* [PATCH 6.12 001/181] mount: honour SB_NOUSER in the new mount API
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 002/181] selftests/bpf: Fail unbound UDP on sockmap update Greg Kroah-Hartman
` (182 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Denis Arefev, Al Viro,
Christian Brauner (Amutable), Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <viro@zeniv.linux.org.uk>
[ Upstream commit 6dd3c6884cd9defb511284b566cef5ac8f657dbf ]
One should *not* be allowed to mount one of those, new API or not.
Reported-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://patch.msgid.link/20260602020444.GP2636677@ZenIV
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
[Denis: rename new_mnt -> newmount.mnt]
[Denis: use goto err_unlock instead of direct return]
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/namespace.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/namespace.c b/fs/namespace.c
index 94c06c8429023..a596381dba1c4 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -4229,6 +4229,11 @@ SYSCALL_DEFINE3(fsmount, int, fs_fd, unsigned int, flags,
ret = PTR_ERR(newmount.mnt);
goto err_unlock;
}
+ if (newmount.mnt->mnt_sb->s_flags & SB_NOUSER) {
+ mntput(newmount.mnt);
+ ret = -EINVAL;
+ goto err_unlock;
+ }
newmount.dentry = dget(fc->root);
newmount.mnt->mnt_flags = mnt_flags;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 002/181] selftests/bpf: Fail unbound UDP on sockmap update
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 001/181] mount: honour SB_NOUSER in the new mount API Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 003/181] drm/amd/display: Add AV mute wait frames to dce110_set_avmute Greg Kroah-Hartman
` (181 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Michal Luczaj, Kuniyuki Iwashima,
Jakub Sitnicki, Kumar Kartikeya Dwivedi,
Ricardo B . Marlière , Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michal Luczaj <mhal@rbox.co>
[ Upstream commit 203b06932777b9ad5085319389dea566f5c2ca63 ]
sockmap now rejects unbound UDP sockets. Adjust test_maps. While at it,
check socket()'s return value.
This effectively reverts commit c39aa2159974 ("bpf, selftests: Fix
test_maps now that sockmap supports UDP").
Signed-off-by: Michal Luczaj <mhal@rbox.co>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20260707-sockmap-lookup-udp-leak-v4-4-f878346f27ab@rbox.co
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Ricardo B. Marlière (SUSE) <ricardo@marliere.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/bpf/test_maps.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index 905d5981ace1b..6f080cc7eb96d 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -752,16 +752,15 @@ static void test_sockmap(unsigned int tasks, void *data)
goto out_sockmap;
}
- /* Test update with unsupported UDP socket */
+ /* Test update with unsupported unbound UDP socket */
udp = socket(AF_INET, SOCK_DGRAM, 0);
- i = 0;
- err = bpf_map_update_elem(fd, &i, &udp, BPF_ANY);
- if (err) {
- printf("Failed socket update SOCK_DGRAM '%i:%i'\n",
- i, udp);
+ CHECK(udp < 0, "socket(AF_INET, SOCK_DGRAM)", "errno:%d\n", errno);
+ err = bpf_map_update_elem(fd, &(int){0}, &udp, BPF_ANY);
+ close(udp);
+ if (!err) {
+ printf("Unexpectedly succeeded unbound UDP update '0:%i'\n", udp);
goto out_sockmap;
}
- close(udp);
/* Test update without programs */
for (i = 0; i < 6; i++) {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 003/181] drm/amd/display: Add AV mute wait frames to dce110_set_avmute
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 001/181] mount: honour SB_NOUSER in the new mount API Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 002/181] selftests/bpf: Fail unbound UDP on sockmap update Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 004/181] drm/amd/display: Check for tg ops in dce110_set_avmute Greg Kroah-Hartman
` (180 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Wayne Lin, Ray Wu, Fangzhi Zuo,
Dan Wheeler, Alex Deucher, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ray Wu <ray.wu@amd.com>
[ Upstream commit 443290d70b01e9c35830c300e3247c06581b594c ]
Port the three-frame wait logic from dcn30_set_avmute to
dce110_set_avmute so that older DCN versions (1.0, 2.0) also
wait for GCP packets to be sent out before proceeding.
This ensures HDMI sinks properly process the mute state,
preventing garbled display after link re-establishment.
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5167
Reviewed-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 414da24137ace80d8c59fefd43ba3ec9f5f854ba)
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../amd/display/dc/hwss/dce110/dce110_hwseq.c | 21 ++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
index 551638d9ff613..a4f092eb0857b 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
@@ -1256,8 +1256,27 @@ void dce110_blank_stream(struct pipe_ctx *pipe_ctx)
void dce110_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
{
- if (pipe_ctx != NULL && pipe_ctx->stream_res.stream_enc != NULL)
+ if (pipe_ctx == NULL || pipe_ctx->stream_res.stream_enc == NULL)
+ return;
+
+ if (dc_is_hdmi_signal(pipe_ctx->stream->signal)) {
pipe_ctx->stream_res.stream_enc->funcs->set_avmute(pipe_ctx->stream_res.stream_enc, enable);
+
+ /* Wait for three frames to make sure AV mute is sent out.
+ * Some HDMI sinks need additional GCP packets to properly
+ * process the mute state, especially after link re-establishment
+ * with HDMI 2.0 scrambling enabled.
+ */
+ if (enable && pipe_ctx->stream_res.tg->funcs->is_tg_enabled(pipe_ctx->stream_res.tg)) {
+ int i;
+
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
+ for (i = 0; i < 3; i++) {
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VBLANK);
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
+ }
+ }
+ }
}
static enum audio_dto_source translate_to_dto_source(enum controller_id crtc_id)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 004/181] drm/amd/display: Check for tg ops in dce110_set_avmute
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (2 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 003/181] drm/amd/display: Add AV mute wait frames to dce110_set_avmute Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 005/181] s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey() Greg Kroah-Hartman
` (179 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Viktor Jägersküpper,
Ray Wu, Alex Deucher, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ray Wu <ray.wu@amd.com>
[ Upstream commit 3141e3d61469bba2624a91c5e2407f110b33b29e ]
Some older DCE timing generators do not implement is_tg_enabled in
their ops table. Calling it unconditionally when waiting for AV mute
frames causes a NULL pointer dereference on Southern Islands dGPUs
when turning the display off over HDMI.
Check that tg and the required ops exist before waiting for frames.
Fixes: 414da24137ac ("drm/amd/display: Add AV mute wait frames to dce110_set_avmute")
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5557
Tested-by: Viktor Jägersküpper <viktor_jaegerskuepper@freenet.de>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
index a4f092eb0857b..dcc78244dd7c3 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
@@ -1267,7 +1267,10 @@ void dce110_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
* process the mute state, especially after link re-establishment
* with HDMI 2.0 scrambling enabled.
*/
- if (enable && pipe_ctx->stream_res.tg->funcs->is_tg_enabled(pipe_ctx->stream_res.tg)) {
+ if (enable && pipe_ctx->stream_res.tg &&
+ pipe_ctx->stream_res.tg->funcs->is_tg_enabled &&
+ pipe_ctx->stream_res.tg->funcs->wait_for_state &&
+ pipe_ctx->stream_res.tg->funcs->is_tg_enabled(pipe_ctx->stream_res.tg)) {
int i;
pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 005/181] s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (3 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 004/181] drm/amd/display: Check for tg ops in dce110_set_avmute Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 006/181] NFS: Pin the struct nfs_server during a FREE_STATEID call Greg Kroah-Hartman
` (178 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Holger Dengler, Harald Freudenberger,
Vasily Gorbik, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Harald Freudenberger <freude@linux.ibm.com>
[ Upstream commit 01476391aecef36a3b789ee844357b22fbc90665 ]
The helper function _ip_cprb_helper() uses internal buffer memory for
building and processing CPRBs. After use this buffer was never
scrubbed which could lead to leaving for example clear key material in
memory which could be exposed via tricky reuse of this same memory.
Extend the _ip_cprb_helper() function with another parameter 'scrub'
used to steer scrubbing of this buffer. So now the caller has the
opportunity to decide if scrubbing is needed or not.
Extend the clear key to secure key token import process in function
cca_clr2cipherkey() to tell the helper function from above to scrub
the cprb buffer when the clear key value is part of the request data.
Add explicit scrubbing on return from function cca_clr2cipherkey() for
the random EXOR buffer and the cprb buffer.
Overall this cleans the internal used buffer in case of clear key
import to prevent sensitive data to get exposed.
Fixes: 4bc123b18ce6 ("s390/zcrypt: Add low level functions for CCA AES cipher keys")
Cc: stable@vger.kernel.org
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/s390/crypto/zcrypt_ccamisc.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c
index 6790afd517ec6..48d36d5a87118 100644
--- a/drivers/s390/crypto/zcrypt_ccamisc.c
+++ b/drivers/s390/crypto/zcrypt_ccamisc.c
@@ -938,7 +938,8 @@ static int _ip_cprb_helper(u16 cardnr, u16 domain,
const u8 *clr_key_value,
int clr_key_bit_size,
u8 *key_token,
- int *key_token_size)
+ int *key_token_size,
+ bool scrub)
{
int rc, n;
u8 *mem, *ptr;
@@ -1077,7 +1078,7 @@ static int _ip_cprb_helper(u16 cardnr, u16 domain,
*key_token_size = t->len;
out:
- free_cprbmem(mem, PARMBSIZE, 0);
+ free_cprbmem(mem, PARMBSIZE, scrub);
return rc;
}
@@ -1120,28 +1121,32 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
* 4/4 COMPLETE the secure cipher key import
*/
rc = _ip_cprb_helper(card, dom, "AES ", "FIRST ", "MIN3PART",
- exorbuf, keybitsize, token, &tokensize);
+ exorbuf, keybitsize, token, &tokensize,
+ true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 1/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
rc = _ip_cprb_helper(card, dom, "AES ", "ADD-PART", NULL,
- clrkey, keybitsize, token, &tokensize);
+ clrkey, keybitsize, token, &tokensize,
+ true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 2/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
rc = _ip_cprb_helper(card, dom, "AES ", "ADD-PART", NULL,
- exorbuf, keybitsize, token, &tokensize);
+ exorbuf, keybitsize, token, &tokensize,
+ true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 3/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
rc = _ip_cprb_helper(card, dom, "AES ", "COMPLETE", NULL,
- NULL, keybitsize, token, &tokensize);
+ NULL, keybitsize, token, &tokensize,
+ true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 4/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
@@ -1158,7 +1163,8 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
*keybufsize = tokensize;
out:
- kfree(token);
+ memzero_explicit(exorbuf, sizeof(exorbuf));
+ kfree_sensitive(token);
return rc;
}
EXPORT_SYMBOL(cca_clr2cipherkey);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 006/181] NFS: Pin the struct nfs_server during a FREE_STATEID call
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (4 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 005/181] s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey() Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 007/181] arm64: dts: broadcom: bcm2712: Remove non-functional EL2 virtual timer Greg Kroah-Hartman
` (177 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Dan Aloni, Anna Schumaker,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Anna Schumaker <anna.schumaker@hammerspace.com>
[ Upstream commit cf616096a0f3a2b60f7d68b6b39674a6867ded9c ]
Dan Aloni reports that he was able to hit a use-after-free bug if a
FREE_STATEID operation gets delayed for whatever reason. Fix this by
bumping the refcount of the 'struct nfs_server' object for the duration
of the FREE_STATEID so it doesn't get cleaned up from underneath us
while operations are still in flight.
Reported-by: Dan Aloni <dan.aloni@vastdata.com>
Fixes: 7c1d5fae4a87 ("NFSv4: Convert nfs41_free_stateid to use an asynchronous RPC call")
Tested-by: Dan Aloni <dan.aloni@vastdata.com>
Signed-off-by: Anna Schumaker <anna.schumaker@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/nfs/nfs4proc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 840789e182ef3..facd4e28770be 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -10585,6 +10585,7 @@ static void nfs41_free_stateid_release(void *calldata)
struct nfs_free_stateid_data *data = calldata;
struct nfs_client *clp = data->server->nfs_client;
+ nfs_sb_deactive(data->server->super);
nfs_put_client(clp);
kfree(calldata);
}
@@ -10626,6 +10627,10 @@ static int nfs41_free_stateid(struct nfs_server *server,
if (!refcount_inc_not_zero(&clp->cl_count))
return -EIO;
+ if (!nfs_sb_active(server->super)) {
+ nfs_put_client(clp);
+ return -EIO;
+ }
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
&task_setup.rpc_client, &msg);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 007/181] arm64: dts: broadcom: bcm2712: Remove non-functional EL2 virtual timer
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (5 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 006/181] NFS: Pin the struct nfs_server during a FREE_STATEID call Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 008/181] ARM: npcm: Fix OF node refcount leaks in SMP setup Greg Kroah-Hartman
` (176 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Marek Szyprowski, Daniel Drake,
Florian Fainelli, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Daniel Drake <dan@reactivated.net>
[ Upstream commit 75952cfc7752c52a2b692b59d34ce160d3edabb2 ]
Commit d87773de9efe1 ("clocksource/drivers/arm_arch_timer: Default to EL2
virtual timer when running VHE") causes boot to hang on Raspberry Pi 5.
The newly-selected EL2 virtual timer does not generate any interrupts,
even though the GIC_DIST_ENABLE_SET flag has been confirmed set via
readback.
It is highly unusual that this timer interrupt is non-operational because
this is a standard GIC interrupt corresponding to a standard Cortex-A76
CPU timer. However, Broadcom have confirmed for this SoC:
> the interrupt line was never connected in the first place as this was
> not identified as being a requirement
Remove the corresponding DeviceTree entry.
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Closes: https://lore.kernel.org/all/ea15cce1-b393-43f6-8d58-3d6f90f0c0cd@samsung.com/
Fixes: faa3381267d0 ("arm64: dts: broadcom: Add minimal support for Raspberry Pi 5")
Signed-off-by: Daniel Drake <dan@reactivated.net>
Link: https://lore.kernel.org/r/20260716-bcm2712-el2-v2-1-e708f7fb42fa@reactivated.net
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/broadcom/bcm2712.dtsi | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
index 209f99b1ceae7..c8e809d77b3fe 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi
@@ -279,8 +279,6 @@ IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) |
IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) |
- IRQ_TYPE_LEVEL_LOW)>,
- <GIC_PPI 12 (GIC_CPU_MASK_SIMPLE(4) |
IRQ_TYPE_LEVEL_LOW)>;
};
};
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 008/181] ARM: npcm: Fix OF node refcount leaks in SMP setup
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (6 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 007/181] arm64: dts: broadcom: bcm2712: Remove non-functional EL2 virtual timer Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 009/181] ARM: dts: BCM5301X: fix PCIe controller 2 second interrupt Greg Kroah-Hartman
` (175 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Yuho Choi, Avi Fishman,
Andrew Jeffery, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yuho Choi <dbgh9129@gmail.com>
[ Upstream commit 8eb052f48331474c2789d07b7f11165c323bd2f9 ]
npcm7xx_smp_boot_secondary() and npcm7xx_smp_prepare_cpus() look up
the GCR and SCU nodes with of_find_compatible_node(). The returned
nodes are used for of_iomap(), but the node references are never
released.
of_iomap() does not consume the device node reference, and iounmap()
only releases the MMIO mapping. Drop each node reference after the
corresponding mapping attempt.
Fixes: 7bffa14c9aed ("arm: npcm: add basic support for Nuvoton BMCs")
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
Reviewed-by: Avi Fishman <avifishman70@gmail.com>
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/mach-npcm/platsmp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/mach-npcm/platsmp.c b/arch/arm/mach-npcm/platsmp.c
index 41891d3aa1247..4c1fc9983746c 100644
--- a/arch/arm/mach-npcm/platsmp.c
+++ b/arch/arm/mach-npcm/platsmp.c
@@ -32,6 +32,7 @@ static int npcm7xx_smp_boot_secondary(unsigned int cpu,
goto out;
}
gcr_base = of_iomap(gcr_np, 0);
+ of_node_put(gcr_np);
if (!gcr_base) {
pr_err("could not iomap gcr");
ret = -ENOMEM;
@@ -60,6 +61,7 @@ static void __init npcm7xx_smp_prepare_cpus(unsigned int max_cpus)
return;
}
scu_base = of_iomap(scu_np, 0);
+ of_node_put(scu_np);
if (!scu_base) {
pr_err("could not iomap scu");
return;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 009/181] ARM: dts: BCM5301X: fix PCIe controller 2 second interrupt
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (7 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 008/181] ARM: npcm: Fix OF node refcount leaks in SMP setup Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 010/181] drm/bridge: ps8640: propagate AUX transfer register errors Greg Kroah-Hartman
` (174 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Rosen Penev, Florian Fainelli,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Rosen Penev <rosenp@gmail.com>
[ Upstream commit bab4d538f8485e0d48538fcb82b285df3779278e ]
PCIe controller 2 has interrupts 0-4 mapping to GIC SPI 138-142. The
mapping for interrupt 1 was incorrectly set to 138 due to a copy-paste
error. Fix it to 139.
Assisted-by: opencode:big-pickle
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://lore.kernel.org/r/20260725215722.9323-1-rosenp@gmail.com
Fixes: 3b3e35b279be ("ARM: dts: BCM5301X: Relicense AXI interrupts code to the GPL 2.0+ / MIT")
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/boot/dts/broadcom/bcm-ns.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/broadcom/bcm-ns.dtsi b/arch/arm/boot/dts/broadcom/bcm-ns.dtsi
index d0d5f7e52a917..f08d0a27de0b4 100644
--- a/arch/arm/boot/dts/broadcom/bcm-ns.dtsi
+++ b/arch/arm/boot/dts/broadcom/bcm-ns.dtsi
@@ -138,7 +138,7 @@ axi@18000000 {
/* PCIe Controller 2 */
<0x00014000 0 &gic GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
- <0x00014000 1 &gic GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
+ <0x00014000 1 &gic GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>,
<0x00014000 2 &gic GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>,
<0x00014000 3 &gic GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>,
<0x00014000 4 &gic GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>,
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 010/181] drm/bridge: ps8640: propagate AUX transfer register errors
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (8 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 009/181] ARM: dts: BCM5301X: fix PCIe controller 2 second interrupt Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 011/181] net: hns3: fix speed configuration residue after driver reload Greg Kroah-Hartman
` (173 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Pengpeng Hou, Douglas Anderson,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pengpeng Hou <pengpeng@iscas.ac.cn>
[ Upstream commit 20697ecb299cd77b4cf8b28f655e56606b0472d8 ]
ps8640_aux_transfer_msg() programs the AUX address registers, starts the
AUX transfer, waits for SWAUX_SEND to clear, and reads the AUX status
register. Several of those regmap operations have return values, but the
function only checks a stale ret after the status read.
Propagate failures from the address write, transfer start, completion
poll, and status read. This avoids returning a transfer length when the
bridge register transaction or AUX completion wait failed.
Fixes: 13afcdd7277e ("drm/bridge: parade-ps8640: Add support for AUX channel")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patch.msgid.link/20260723103509.2-ps8640-v2-pengpeng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/bridge/parade-ps8640.c | 27 ++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 14d4dcf239da8..61ea855e55d87 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -258,8 +258,14 @@ static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,
addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :
((len - 1) & SWAUX_LENGTH_MASK);
- regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
- ARRAY_SIZE(addr_len));
+ ret = regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
+ ARRAY_SIZE(addr_len));
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "failed to write AUX address %#x, len %zu: %d\n",
+ msg->address, len, ret);
+ return ret;
+ }
if (len && (request == DP_AUX_NATIVE_WRITE ||
request == DP_AUX_I2C_WRITE)) {
@@ -275,13 +281,22 @@ static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,
}
}
- regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
+ ret = regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to start AUX transfer: %d\n", ret);
+ return ret;
+ }
/* Zero delay loop because i2c transactions are slow already */
- regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
- !(data & SWAUX_SEND), 0, 50 * 1000);
+ ret = regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
+ !(data & SWAUX_SEND), 0, 50 * 1000);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to complete AUX transfer: %d\n",
+ ret);
+ return ret;
+ }
- regmap_read(map, PAGE0_SWAUX_STATUS, &data);
+ ret = regmap_read(map, PAGE0_SWAUX_STATUS, &data);
if (ret) {
DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n",
ret);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 011/181] net: hns3: fix speed configuration residue after driver reload
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (9 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 010/181] drm/bridge: ps8640: propagate AUX transfer register errors Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 012/181] Revert "net: thunderbolt: Enable end-to-end flow control also in transmit" Greg Kroah-Hartman
` (172 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jijie Shao, Simon Horman,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jijie Shao <shaojijie@huawei.com>
[ Upstream commit 3860d8748af315bfee6fe669fddc1fc17d3214db ]
After setting a 100G optical port to 40G via ethtool and reloading
the driver, the port remains at 40G instead of reverting to the
firmware default speed of 100G.
The commit referenced in Fixes: added two overwrites in
hclge_init_ae_dev() for non-copper media, so that optical ports
connected to forced-mode remotes inherit the firmware-preset
autoneg and speed instead of the hardcoded defaults:
req_autoneg = mac.autoneg
req_speed = mac.speed (when autoneg disabled)
The autoneg overwrite keeps existing behavior:
hclge_set_autoneg_speed_dup() already uses mac.autoneg (not
req_autoneg) since it was introduced, so autoneg inheritance from
firmware was already in place. This part is kept.
The speed overwrite, however, introduces the residue: mac.speed
reflects whatever was last programmed into the MAC, and after unload
firmware does not restore the MAC speed to the flash default. So if
the user changed speed via ethtool in a prior load, mac.speed still
carries that value on reload and req_speed inherits it.
Fix by dropping the req_speed overwrite only. req_speed keeps the
firmware default value set in hclge_configure() (cfg.default_speed),
so a reload reverts the speed to default, matching the expectation
that a driver reload resets link configuration.
Trade-off: on optical ports whose firmware default speed does not
match a forced-mode remote, reload now drops the link and the user
must re-apply ethtool configuration. This is acceptable: a driver
reload is expected to reset link configuration, not to inherit
runtime state from before unload. The autoneg inheritance is left
in place as established behavior; changing it is out of scope for
this patch and would itself be a user-perceivable behavior change.
Fixes: d9d349c4e8a0 ("net: hns3: differentiate autoneg default values between copper and fiber")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260724093036.426631-1-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 79858b06c97b0..786aefc3d107e 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -11930,12 +11930,8 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
if (ret)
goto err_ptp_uninit;
- if (hdev->hw.mac.media_type != HNAE3_MEDIA_TYPE_COPPER) {
+ if (hdev->hw.mac.media_type != HNAE3_MEDIA_TYPE_COPPER)
hdev->hw.mac.req_autoneg = hdev->hw.mac.autoneg;
- if (hdev->hw.mac.autoneg == AUTONEG_DISABLE &&
- hdev->hw.mac.speed != SPEED_UNKNOWN)
- hdev->hw.mac.req_speed = hdev->hw.mac.speed;
- }
ret = hclge_set_autoneg_speed_dup(hdev);
if (ret) {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 012/181] Revert "net: thunderbolt: Enable end-to-end flow control also in transmit"
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (10 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 011/181] net: hns3: fix speed configuration residue after driver reload Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 013/181] bonding: alb: re-check primary_is_promisc under RTNL in bond_alb_monitor Greg Kroah-Hartman
` (171 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, zhangjianrong, Fan Ye,
Mika Westerberg, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Fan Ye <fy15309206903@gmail.com>
[ Upstream commit 1881f2efbf7f78dc0a79a387b29fde6ff56d3731 ]
This reverts commit a8065af3346ebd7c76ebc113451fb3ba94cf7769.
Per the USB4 spec, a Transmit Descriptor Ring with E2E flow control
disabled does not require any credits to be available before the Host
Interface Adapter Layer transmits a tunneled packet from it. Once E2E is
enabled on that ring the controller must first obtain end-to-end
credits.
The ASMedia ASM4242 USB4 host router (PCI 1b21:2425) never delivers
those credits. The controller does accept the configuration: reading the
ring OPTIONS register back right after tb_ring_start() returns exactly
what was written, including RING_FLAG_E2E_FLOW_CONTROL (bit 28) and the
E2E HopID field. No credit ever arrives though, so the Tx ring's
hardware consumer index never advances and the link carries no traffic
at all.
Measured on two hosts connected point to point, onboard ASM4242 on MSI
X870E and X870, v6.17, stock drivers/net/thunderbolt/main.c with only
this revert applied on top:
before: 100% packet loss to the peer; thunderbolt0 is up and the
XDomain handshake completes ("new host found"), but iperf3
fails with "No route to host" once the neighbour entry
expires
after: 0% packet loss, 0.28 ms RTT; iperf3 4.21 Gb/s one way and
5.17 Gb/s the other (5 runs each, stddev <= 0.02), 1
retransmit in 10 s
An instrumented build additionally showed a frozen-Tx-consumer watchdog
firing ~30k times in a 10 s window before this change.
Rx-side E2E is not touched by this revert, so peers that do return
credits keep receive-side flow control.
ASMedia does not look like an isolated case. The out-of-tree
thunderbolt-ibverbs project disables native E2E on AMD NHI by default,
noting that "Strix Halo has reproduced TX completion wedges with
multiple native E2E rings active" -- the same failure mode, on a
different vendor. Since the driver has no way to tell in advance which
host router returns the credits, going back to the previous behaviour
looks safer than adding a quirk per affected part; Tx-side E2E can be
reintroduced as an opt-in for controllers that are known to implement
the credit return.
Note that the reverted commit was not fixing a reported problem, it was
derived from the spec wording alone, so this revert is not expected to
regress a known workload. Cc'ing the original author in case there was
one.
Fixes: a8065af3346e ("net: thunderbolt: Enable end-to-end flow control also in transmit")
Cc: zhangjianrong <zhangjianrong5@huawei.com>
Signed-off-by: Fan Ye <fy15309206903@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://patch.msgid.link/20260727123002.25225-1-fy15309206903@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/thunderbolt/main.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/net/thunderbolt/main.c b/drivers/net/thunderbolt/main.c
index 5d7d11d75b0b8..960839a651e51 100644
--- a/drivers/net/thunderbolt/main.c
+++ b/drivers/net/thunderbolt/main.c
@@ -928,12 +928,8 @@ static int tbnet_open(struct net_device *dev)
netif_carrier_off(dev);
- flags = RING_FLAG_FRAME;
- /* Only enable full E2E if the other end supports it too */
- if (tbnet_e2e && net->svc->prtcstns & TBNET_E2E)
- flags |= RING_FLAG_E2E;
-
- ring = tb_ring_alloc_tx(xd->tb->nhi, -1, TBNET_RING_SIZE, flags);
+ ring = tb_ring_alloc_tx(xd->tb->nhi, -1, TBNET_RING_SIZE,
+ RING_FLAG_FRAME);
if (!ring) {
netdev_err(dev, "failed to allocate Tx ring\n");
return -ENOMEM;
@@ -952,6 +948,11 @@ static int tbnet_open(struct net_device *dev)
sof_mask = BIT(TBIP_PDF_FRAME_START);
eof_mask = BIT(TBIP_PDF_FRAME_END);
+ flags = RING_FLAG_FRAME;
+ /* Only enable full E2E if the other end supports it too */
+ if (tbnet_e2e && net->svc->prtcstns & TBNET_E2E)
+ flags |= RING_FLAG_E2E;
+
ring = tb_ring_alloc_rx(xd->tb->nhi, -1, TBNET_RING_SIZE, flags,
net->tx_ring.ring->hop, sof_mask,
eof_mask, tbnet_start_poll, net);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 013/181] bonding: alb: re-check primary_is_promisc under RTNL in bond_alb_monitor
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (11 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 012/181] Revert "net: thunderbolt: Enable end-to-end flow control also in transmit" Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 014/181] enic: fix tx_hang_reset use-after-free on device removal Greg Kroah-Hartman
` (170 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, AutonomousCodeSecurity,
Xiang Mei (Microsoft), Nikolay Aleksandrov, Jay Vosburgh,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xiang Mei (Microsoft) <xmei5@asu.edu>
[ Upstream commit 683c6ba6e58e6ed1037831ea97dd58d9c0e76b8d ]
bond_alb_monitor() reads primary_is_promisc under RCU, then drops RCU and
takes RTNL via rtnl_trylock() before undoing the promiscuity it set on the
active slave. In that window the active slave can change under RTNL
(RTM_DELLINK -> __bond_release_one() -> bond_alb_handle_active_change()),
which already drops the promiscuity and clears primary_is_promisc. The
monitor still acts on the stale decision: if the slave was removed with no
failover, curr_active_slave is now NULL and the deref faults; if it failed
over, the stale dev_set_promiscuity(-1) underflows the new slave's
promiscuity counter and pins it in IFF_PROMISC.
Oops: general protection fault, probably for non-canonical address ...
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Workqueue: b42 bond_alb_monitor
RIP: 0010:bond_alb_monitor (drivers/net/bonding/bond_alb.c:1600)
process_one_work (kernel/workqueue.c:3322)
worker_thread (kernel/workqueue.c:3486)
kthread (kernel/kthread.c:436)
ret_from_fork (arch/x86/kernel/process.c:158)
Kernel panic - not syncing: Fatal exception
Re-check primary_is_promisc (and curr_active_slave) after taking RTNL so
the monitor only undoes an increment it still owns. The other bonding
monitors already re-read state under RTNL in their commit phase
(bond_miimon_commit/bond_ab_arp_commit); bond_alb_monitor() was the only
one acting on the pre-trylock decision.
Fixes: d0e81b7e2246 ("bonding: Acquire correct locks in alb for promisc change")
Reported-by: AutonomousCodeSecurity@microsoft.com
Signed-off-by: Xiang Mei (Microsoft) <xmei5@asu.edu>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20260725233930.2957317-1-xmei5@asu.edu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/bonding/bond_alb.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 7edf0fd58c346..ce6a3a0a2e153 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1535,8 +1535,8 @@ void bond_alb_monitor(struct work_struct *work)
struct bonding *bond = container_of(work, struct bonding,
alb_work.work);
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
+ struct slave *slave, *curr;
struct list_head *iter;
- struct slave *slave;
if (!bond_has_slaves(bond)) {
atomic_set(&bond_info->tx_rebalance_counter, 0);
@@ -1598,9 +1598,11 @@ void bond_alb_monitor(struct work_struct *work)
* because a slave was disabled then
* it can now leave promiscuous mode.
*/
- dev_set_promiscuity(rtnl_dereference(bond->curr_active_slave)->dev,
- -1);
- bond_info->primary_is_promisc = 0;
+ curr = rtnl_dereference(bond->curr_active_slave);
+ if (bond_info->primary_is_promisc && curr) {
+ dev_set_promiscuity(curr->dev, -1);
+ bond_info->primary_is_promisc = 0;
+ }
rtnl_unlock();
rcu_read_lock();
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 014/181] enic: fix tx_hang_reset use-after-free on device removal
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (12 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 013/181] bonding: alb: re-check primary_is_promisc under RTNL in bond_alb_monitor Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 015/181] net/mlx5e: TC, Check if flow is PEER before acquiring devcom lock Greg Kroah-Hartman
` (169 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Satish Kharat, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Satish Kharat <satishkh@cisco.com>
[ Upstream commit ec680ea4ba1bca92a767fb7e7869758bfdd886e3 ]
enic_remove() cancels the reset and change_mtu_work items but does not
cancel tx_hang_reset. A TX timeout that fires while the device is being
removed can schedule enic_tx_hang_reset() so that it runs after
free_netdev(), resulting in a use-after-free.
cancel_work_sync() alone is not sufficient here: the still-live watchdog
and notify paths can re-schedule these work items in the window between
the cancel and unregister_netdev(). Use disable_work_sync(), which
cancels the work and blocks any subsequent schedule_work() from
requeuing it, and apply it to the reset and change_mtu_work items as
well so the same requeue race is closed for all teardown work.
Fixes: 937317c7c109 ("enic: do hang reset only in case of tx timeout")
Signed-off-by: Satish Kharat <satishkh@cisco.com>
Link: https://patch.msgid.link/20260728062730.2394873-1-satishkh@cisco.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/cisco/enic/enic_main.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index a432783756d8c..e474cef720630 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -3141,8 +3141,9 @@ static void enic_remove(struct pci_dev *pdev)
if (netdev) {
struct enic *enic = netdev_priv(netdev);
- cancel_work_sync(&enic->reset);
- cancel_work_sync(&enic->change_mtu_work);
+ disable_work_sync(&enic->reset);
+ disable_work_sync(&enic->tx_hang_reset);
+ disable_work_sync(&enic->change_mtu_work);
unregister_netdev(netdev);
enic_dev_deinit(enic);
vnic_dev_close(enic->vdev);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 015/181] net/mlx5e: TC, Check if flow is PEER before acquiring devcom lock
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (13 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 014/181] enic: fix tx_hang_reset use-after-free on device removal Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 016/181] pds_core: keep the health thread stopped during reset Greg Kroah-Hartman
` (168 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Shay Drory, Cosmin Ratiu,
Tariq Toukan, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shay Drory <shayd@nvidia.com>
[ Upstream commit 6ddfba2ea98db21b001e0e5c472499156224650c ]
In case __mlx5e_add_fdb_flow() fails in lower levels, the flow is
deleted via mlx5e_tc_del_flow(), and mlx5e_tc_del_flow() is acquiring
ESW devcom lock without condition. In addition, in case of peer_flow,
__mlx5e_add_fdb_flow() is called while holding ESW devcom comp lock.
This results in an AA deadlock.
To fix this, introduce a new PEER flag that is set on flows created as
peer flows (the duplicate flows on peer devices), and check it in
mlx5e_tc_del_flow() before acquiring ESW devcom lock.
Lockdep splat:
============================================
WARNING: possible recursive locking detected
============================================
Possible unsafe locking scenario:
CPU0
----
lock(&comp->lock_key#2);
lock(&comp->lock_key#2);
*** DEADLOCK ***
Call Trace:
<TASK>
dump_stack_lvl+0x69/0xa0
print_deadlock_bug.cold+0xbd/0xca
__lock_acquire+0x1671/0x2ec0
lock_acquire+0x10e/0x2e0
down_read+0x95/0x430
mlx5_devcom_for_each_peer_begin+0x4e/0xe0 [mlx5_core]
mlx5e_tc_del_flow+0x11d/0xa70 [mlx5_core]
mlx5e_flow_put+0x99/0x100 [mlx5_core]
__mlx5e_add_fdb_flow+0x409/0xf00 [mlx5_core]
mlx5e_configure_flower+0x2a86/0x4100 [mlx5_core]
mlx5e_rep_setup_tc_cls_flower+0x12f/0x1b0 [mlx5_core]
mlx5e_rep_setup_tc_cb+0x153/0x750 [mlx5_core]
tc_setup_cb_add+0x1dc/0x470
fl_change+0x2f4d/0x626d [cls_flower]
tc_new_tfilter+0x79b/0x2310
rtnetlink_rcv_msg+0x778/0xad0
do_syscall_64+0x70/0x960
entry_SYSCALL_64_after_hwframe+0x4b/0x53
</TASK>
Fixes: 04de7dda7394 ("net/mlx5e: Infrastructure for duplicated offloading of TC flows")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260728044338.2271143-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h | 1 +
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h
index efb34de4cb7ad..692ac2f21d94e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h
@@ -30,6 +30,7 @@ enum {
MLX5E_TC_FLOW_FLAG_FAILED = MLX5E_TC_FLOW_BASE + 9,
MLX5E_TC_FLOW_FLAG_SAMPLE = MLX5E_TC_FLOW_BASE + 10,
MLX5E_TC_FLOW_FLAG_USE_ACT_STATS = MLX5E_TC_FLOW_BASE + 11,
+ MLX5E_TC_FLOW_FLAG_PEER = MLX5E_TC_FLOW_BASE + 12,
};
struct mlx5e_tc_flow_parse_attr {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 8878990254f46..a5ae179310672 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -2161,7 +2161,8 @@ static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
if (mlx5e_is_eswitch_flow(flow)) {
struct mlx5_devcom_comp_dev *devcom = flow->priv->mdev->priv.eswitch->devcom;
- if (!mlx5_devcom_for_each_peer_begin(devcom)) {
+ if (flow_flag_test(flow, PEER) ||
+ !mlx5_devcom_for_each_peer_begin(devcom)) {
mlx5e_tc_del_fdb_flow(priv, flow);
return;
}
@@ -4605,6 +4606,7 @@ static int mlx5e_tc_add_fdb_peer_flow(struct flow_cls_offload *f,
else
in_mdev = priv->mdev;
+ flow_flags |= BIT(MLX5E_TC_FLOW_FLAG_PEER);
parse_attr = flow->attr->parse_attr;
peer_flow = __mlx5e_add_fdb_flow(peer_priv, f, flow_flags,
parse_attr->filter_dev,
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 016/181] pds_core: keep the health thread stopped during reset
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (14 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 015/181] net/mlx5e: TC, Check if flow is PEER before acquiring devcom lock Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 017/181] pds_core: cancel pending PCI reset work on AER recovery Greg Kroah-Hartman
` (167 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, sashiko-bot, Nikhil P. Rao,
Jacob Keller, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nikhil P. Rao <nikhil.rao@amd.com>
[ Upstream commit cd09971dcc1c499ae0879010a00e9dba87abdc4f ]
Commit d9407ff11809 ("pds_core: Prevent health thread from running
during reset/remove") stops the health thread with cancel_work_sync()
before a reset, but a devcmd timeout during pdsc_fw_down() re-queues
health_work, so pdsc_health_thread() runs again mid-reset and double
allocates the core DMA queues via pdsc_fw_up().
Only the reset path is affected: on remove PDSC_S_STOPPING_DRIVER gates
the health thread and the workqueue is destroyed.
Use disable_work_sync() to cancel health_work and block further
queue_work() on it, and enable_work() in pdsc_restart_health_thread() to
re-allow it after the reset.
disable_work_sync() keeps a disable depth, so every disable must be
matched by one enable. pdsc_reset_prepare() stops the health thread and
pdsc_reset_done() restarts it. On the AER path pdsc_pci_error_detected()
calls pdsc_reset_prepare(), then pdsc_pci_error_resume() re-inits via
pci_reset_function_locked() (pds_core has no .slot_reset handler), which
runs the pair again - stopping the thread twice but restarting it once.
Gate the disable and enable on a health_stopped flag so each fires at
most once per stopped/running transition.
Fixes: d9407ff11809 ("pds_core: Prevent health thread from running during reset/remove")
Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260629200358.2626129-1-nikhil.rao%40amd.com?part=2
Signed-off-by: Nikhil P. Rao <nikhil.rao@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260727164548.359562-1-nikhil.rao@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/amd/pds_core/core.h | 1 +
drivers/net/ethernet/amd/pds_core/main.c | 10 ++++++++--
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
index becd3104473c2..4dbfe2373b3ac 100644
--- a/drivers/net/ethernet/amd/pds_core/core.h
+++ b/drivers/net/ethernet/amd/pds_core/core.h
@@ -170,6 +170,7 @@ struct pdsc {
struct timer_list wdtimer;
unsigned int wdtimer_period;
struct work_struct health_work;
+ bool health_stopped;
struct devlink_health_reporter *fw_reporter;
u32 fw_recoveries;
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index c78b17d230a84..2329396ec3e25 100644
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -464,8 +464,10 @@ static void pdsc_stop_health_thread(struct pdsc *pdsc)
return;
timer_shutdown_sync(&pdsc->wdtimer);
- if (pdsc->health_work.func)
- cancel_work_sync(&pdsc->health_work);
+ if (pdsc->health_work.func && !pdsc->health_stopped) {
+ disable_work_sync(&pdsc->health_work);
+ pdsc->health_stopped = true;
+ }
}
static void pdsc_restart_health_thread(struct pdsc *pdsc)
@@ -473,6 +475,10 @@ static void pdsc_restart_health_thread(struct pdsc *pdsc)
if (pdsc->pdev->is_virtfn)
return;
+ if (pdsc->health_stopped) {
+ enable_work(&pdsc->health_work);
+ pdsc->health_stopped = false;
+ }
timer_setup(&pdsc->wdtimer, pdsc_wdtimer_cb, 0);
mod_timer(&pdsc->wdtimer, jiffies + 1);
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 017/181] pds_core: cancel pending PCI reset work on AER recovery
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (15 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 016/181] pds_core: keep the health thread stopped during reset Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 018/181] netfilter: ipset: switch ext_size to atomic64_t Greg Kroah-Hartman
` (166 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, sashiko-bot, Nikhil P. Rao,
Jacob Keller, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nikhil P. Rao <nikhil.rao@amd.com>
[ Upstream commit 57d635329d799b79096155cdf47ee0013d6780d1 ]
pdsc_check_pci_health() queues pci_reset_work when it sees a broken PCI
connection, and nothing cancels it. When the PCI core starts AER
recovery, pdsc_pci_error_detected() runs pdsc_reset_prepare() and
recovers the device, but a pci_reset_work queued just before is left
pending. If it runs after recovery released the device lock, it resets a
device the driver now considers healthy, bouncing the link for no reason.
Cancel pci_reset_work in pdsc_pci_error_detected() after
pdsc_reset_prepare(), which has already stopped the health thread so it
cannot requeue the work. cancel_work_sync() is safe under the device
lock here because pdsc_pci_reset_thread() uses pci_try_reset_function(),
which returns instead of blocking on the lock. Only PFs initialize
pci_reset_work, so guard the cancel with !is_virtfn.
Fixes: 81665adf25d2 ("pds_core: Fix pdsc_check_pci_health function to use work thread")
Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260714180223.1642792-2-nikhil.rao%40amd.com?part=1
Signed-off-by: Nikhil P. Rao <nikhil.rao@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260727170030.361116-1-nikhil.rao@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/amd/pds_core/main.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index 2329396ec3e25..9526223a72978 100644
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -550,7 +550,11 @@ static pci_ers_result_t pdsc_pci_error_detected(struct pci_dev *pdev,
pci_channel_state_t error)
{
if (error == pci_channel_io_frozen) {
+ struct pdsc *pdsc = pci_get_drvdata(pdev);
+
pdsc_reset_prepare(pdev);
+ if (!pdev->is_virtfn)
+ cancel_work_sync(&pdsc->pci_reset_work);
return PCI_ERS_RESULT_NEED_RESET;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 018/181] netfilter: ipset: switch ext_size to atomic64_t
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (16 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 017/181] pds_core: cancel pending PCI reset work on AER recovery Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 019/181] ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Greg Kroah-Hartman
` (165 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jozsef Kadlecsik, Florian Westphal,
Pablo Neira Ayuso, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jozsef Kadlecsik <kadlec@netfilter.org>
[ Upstream commit 712a6f545c359b427daa9a5a782e30d2f8331e25 ]
The hash types do not acquire set->lock, they use 'region locking' where
only part of the hash table is locked. Parallel inserts and deletes are
possible and CPUs can race on ->ext_size update. Switch to atomic64_t.
This leaves another bug unresolved: there still can be a race on
comment extension re-init. This will be handled in a later commit
when converting to rhashtable backend.
Fixes: f66ee0410b1c ("netfilter: ipset: Fix "INFO: rcu detected stall in hash_xxx" reports")
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/linux/netfilter/ipset/ip_set.h | 2 +-
net/netfilter/ipset/ip_set_bitmap_gen.h | 4 ++--
net/netfilter/ipset/ip_set_core.c | 6 +++---
net/netfilter/ipset/ip_set_hash_gen.h | 2 +-
net/netfilter/ipset/ip_set_list_set.c | 4 ++--
5 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/include/linux/netfilter/ipset/ip_set.h b/include/linux/netfilter/ipset/ip_set.h
index b98331572ad29..cadae9b2578f1 100644
--- a/include/linux/netfilter/ipset/ip_set.h
+++ b/include/linux/netfilter/ipset/ip_set.h
@@ -273,7 +273,7 @@ struct ip_set {
/* Number of elements (vs timeout) */
u32 elements;
/* Size of the dynamic extensions (vs timeout) */
- size_t ext_size;
+ atomic64_t ext_size;
/* Element data size */
size_t dsize;
/* Offsets to extensions in elements */
diff --git a/net/netfilter/ipset/ip_set_bitmap_gen.h b/net/netfilter/ipset/ip_set_bitmap_gen.h
index cb48a2b9cb9fd..cf8468bf987db 100644
--- a/net/netfilter/ipset/ip_set_bitmap_gen.h
+++ b/net/netfilter/ipset/ip_set_bitmap_gen.h
@@ -77,7 +77,7 @@ mtype_flush(struct ip_set *set)
mtype_ext_cleanup(set);
bitmap_zero(map->members, map->elements);
set->elements = 0;
- set->ext_size = 0;
+ atomic64_set(&set->ext_size, 0);
}
/* Calculate the actual memory size of the set data */
@@ -93,7 +93,7 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
{
const struct mtype *map = set->data;
struct nlattr *nested;
- size_t memsize = mtype_memsize(map, set->dsize) + set->ext_size;
+ size_t memsize = mtype_memsize(map, set->dsize) + atomic64_read(&set->ext_size);
nested = nla_nest_start(skb, IPSET_ATTR_DATA);
if (!nested)
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index f51a1af31513c..29bf5ee74fe36 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -350,7 +350,7 @@ ip_set_init_comment(struct ip_set *set, struct ip_set_comment *comment,
size_t len = ext->comment ? strlen(ext->comment) : 0;
if (unlikely(c)) {
- set->ext_size -= sizeof(*c) + strlen(c->str) + 1;
+ atomic64_sub(sizeof(*c) + strlen(c->str) + 1, &set->ext_size);
rcu_assign_pointer(comment->c, NULL);
kfree_rcu(c, rcu);
}
@@ -362,7 +362,7 @@ ip_set_init_comment(struct ip_set *set, struct ip_set_comment *comment,
if (unlikely(!c))
return;
strscpy(c->str, ext->comment, len + 1);
- set->ext_size += sizeof(*c) + strlen(c->str) + 1;
+ atomic64_add(sizeof(*c) + strlen(c->str) + 1, &set->ext_size);
rcu_assign_pointer(comment->c, c);
}
EXPORT_SYMBOL_GPL(ip_set_init_comment);
@@ -392,7 +392,7 @@ ip_set_comment_free(struct ip_set *set, void *ptr)
c = rcu_dereference_protected(comment->c, 1);
if (unlikely(!c))
return;
- set->ext_size -= sizeof(*c) + strlen(c->str) + 1;
+ atomic64_sub(sizeof(*c) + strlen(c->str) + 1, &set->ext_size);
rcu_assign_pointer(comment->c, NULL);
kfree_rcu(c, rcu);
}
diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h
index 4c1082e38e3d1..81d7f601ed06a 100644
--- a/net/netfilter/ipset/ip_set_hash_gen.h
+++ b/net/netfilter/ipset/ip_set_hash_gen.h
@@ -1289,7 +1289,7 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
rcu_read_lock_bh();
t = rcu_dereference_bh(h->table);
mtype_ext_size(set, &elements, &ext_size);
- memsize = mtype_ahash_memsize(h, t) + ext_size + set->ext_size;
+ memsize = mtype_ahash_memsize(h, t) + ext_size + atomic64_read(&set->ext_size);
htable_bits = t->htable_bits;
rcu_read_unlock_bh();
diff --git a/net/netfilter/ipset/ip_set_list_set.c b/net/netfilter/ipset/ip_set_list_set.c
index 83e1fdcc752d6..9d6ab69ca1a37 100644
--- a/net/netfilter/ipset/ip_set_list_set.c
+++ b/net/netfilter/ipset/ip_set_list_set.c
@@ -421,7 +421,7 @@ list_set_flush(struct ip_set *set)
list_for_each_entry_safe(e, n, &map->members, list)
list_set_del(set, e);
set->elements = 0;
- set->ext_size = 0;
+ atomic64_set(&set->ext_size, 0);
}
static void
@@ -455,7 +455,7 @@ list_set_head(struct ip_set *set, struct sk_buff *skb)
{
const struct list_set *map = set->data;
struct nlattr *nested;
- size_t memsize = list_set_memsize(map, set->dsize) + set->ext_size;
+ size_t memsize = list_set_memsize(map, set->dsize) + atomic64_read(&set->ext_size);
nested = nla_nest_start(skb, IPSET_ATTR_DATA);
if (!nested)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 019/181] ipvs: avoid out-of-bounds write in ip_vs_nat_icmp
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (17 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 018/181] netfilter: ipset: switch ext_size to atomic64_t Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 020/181] ipvs: return the csum validation for forward hook Greg Kroah-Hartman
` (164 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Julian Anastasov, Pablo Neira Ayuso,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Julian Anastasov <ja@ssi.bg>
[ Upstream commit 646922a0379496154e8c8faca4f8e2fd9100cacc ]
Sashiko warns that local attacker can modify the packet
while it is processed by IPVS. Some places read the
IP ihl field multiple times which can cause out-of-bounds
access. One such place is ip_vs_nat_icmp where we
can write after the validated area.
Fix it by providing ciph argument just like it is done for
IPv6 and use ciph->len as offset to the embedded transport
header.
Modify some IPv4 header checks by reading the ihl field
only once.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Link: https://sashiko.dev/#/patchset/20260722101517.36313-1-ja%40ssi.bg
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/net/ip_vs.h | 2 +-
net/netfilter/ipvs/ip_vs_core.c | 67 +++++++++++++++++----------------
net/netfilter/ipvs/ip_vs_xmit.c | 2 +-
3 files changed, 36 insertions(+), 35 deletions(-)
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 6935ec09af24d..80110ec025002 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -1707,7 +1707,7 @@ static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
struct ip_vs_conn *cp, int dir, unsigned int toff,
- bool has_ports);
+ bool has_ports, struct ip_vs_iphdr *ciph);
#ifdef CONFIG_IP_VS_IPV6
void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index 6207a91e93f3b..586346110cd89 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -747,28 +747,27 @@ static int ip_vs_route_me_harder(struct netns_ipvs *ipvs, int af,
*/
void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
struct ip_vs_conn *cp, int inout, unsigned int toff,
- bool has_ports)
+ bool has_ports, struct ip_vs_iphdr *ciph)
{
struct iphdr *iph = ip_hdr(skb);
struct icmphdr *icmph = (struct icmphdr *)(skb->data + toff);
- struct iphdr *ciph = (struct iphdr *)(icmph + 1);
- unsigned int coff __maybe_unused = toff + sizeof(struct icmphdr);
+ struct iphdr *cih = (struct iphdr *)(icmph + 1);
if (inout) {
iph->saddr = cp->vaddr.ip;
ip_send_check(iph);
- ciph->daddr = cp->vaddr.ip;
- ip_send_check(ciph);
+ cih->daddr = cp->vaddr.ip;
+ ip_send_check(cih);
} else {
iph->daddr = cp->daddr.ip;
ip_send_check(iph);
- ciph->saddr = cp->daddr.ip;
- ip_send_check(ciph);
+ cih->saddr = cp->daddr.ip;
+ ip_send_check(cih);
}
/* the TCP/UDP/SCTP port */
if (has_ports) {
- __be16 *ports = (void *)ciph + ciph->ihl*4;
+ __be16 *ports = (void *)(skb->data + ciph->len);
if (inout)
ports[1] = cp->vport;
@@ -782,10 +781,10 @@ void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (inout)
- IP_VS_DBG_PKT(11, AF_INET, pp, skb, coff,
+ IP_VS_DBG_PKT(11, AF_INET, pp, skb, ciph->off,
"Forwarding altered outgoing ICMP");
else
- IP_VS_DBG_PKT(11, AF_INET, pp, skb, coff,
+ IP_VS_DBG_PKT(11, AF_INET, pp, skb, ciph->off,
"Forwarding altered incoming ICMP");
}
@@ -878,7 +877,7 @@ static int handle_response_icmp(int af, struct sk_buff *skb,
ip_vs_nat_icmp_v6(skb, pp, cp, 1, toff, has_ports, ciph);
else
#endif
- ip_vs_nat_icmp(skb, pp, cp, 1, toff, has_ports);
+ ip_vs_nat_icmp(skb, pp, cp, 1, toff, has_ports, ciph);
if (ip_vs_route_me_harder(cp->ipvs, af, skb, hooknum))
goto out;
@@ -914,7 +913,7 @@ static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
struct ip_vs_iphdr ciph;
struct ip_vs_conn *cp;
struct ip_vs_protocol *pp;
- unsigned int offset, ihl;
+ unsigned int offset;
union nf_inet_addr snet;
*related = 1;
@@ -927,7 +926,6 @@ static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
return NF_ACCEPT;
}
- ihl = ipvsh->len;
offset = ipvsh->len;
ic = skb_header_pointer(skb, offset, sizeof(_icmph), &_icmph);
if (ic == NULL)
@@ -953,11 +951,15 @@ static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
/* Now find the contained IP header */
offset += sizeof(_icmph);
+ if (!ip_vs_fill_iph_skb_icmp(AF_INET, skb, offset, true, &ciph))
+ return NF_ACCEPT; /* The packet looks wrong, ignore */
+
cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (!(cih && cih->version == 4 && cih->ihl >= 5))
+ if (!(cih && cih->version == 4 &&
+ ciph.len - ciph.off >= sizeof(struct iphdr)))
return NF_ACCEPT; /* The packet looks wrong, ignore */
- pp = ip_vs_proto_get(cih->protocol);
+ pp = ip_vs_proto_get(ciph.protocol);
if (!pp)
return NF_ACCEPT;
@@ -968,8 +970,6 @@ static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset,
"Checking outgoing ICMP for");
- ip_vs_fill_iph_skb_icmp(AF_INET, skb, offset, true, &ciph);
-
/* The embedded headers contain source and dest in reverse order */
cp = INDIRECT_CALL_1(pp->conn_out_get, ip_vs_conn_out_get_proto,
ipvs, AF_INET, skb, &ciph);
@@ -977,8 +977,8 @@ static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
return NF_ACCEPT;
snet.ip = ipvsh->saddr.ip;
- return handle_response_icmp(AF_INET, skb, &snet, cp, pp, &ciph, ihl,
- hooknum);
+ return handle_response_icmp(AF_INET, skb, &snet, cp, pp, &ciph,
+ ipvsh->len, hooknum);
}
#ifdef CONFIG_IP_VS_IPV6
@@ -1625,10 +1625,12 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
/* Now find the contained IP header */
offset += sizeof(_icmph);
cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (!(cih && cih->version == 4 && cih->ihl >= 5))
+ if (!cih)
return NF_ACCEPT; /* The packet looks wrong, ignore */
- raddr = (union nf_inet_addr *)&cih->daddr;
hlen_ipip = cih->ihl * 4;
+ if (!(cih->version == 4 && hlen_ipip >= sizeof(struct iphdr)))
+ return NF_ACCEPT; /* The packet looks wrong, ignore */
+ raddr = (union nf_inet_addr *)&cih->daddr;
/* Special case for errors for IPIP/UDP/GRE tunnel packets */
tunnel = false;
@@ -1645,9 +1647,6 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
if (!dest || dest->tun_type != IP_VS_CONN_F_TUNNEL_TYPE_IPIP)
return NF_ACCEPT;
offset += hlen_ipip;
- cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
- if (!(cih && cih->version == 4 && cih->ihl >= 5))
- return NF_ACCEPT; /* The packet looks wrong, ignore */
tunnel = true;
} else if ((cih->protocol == IPPROTO_UDP || /* Can be UDP encap */
cih->protocol == IPPROTO_GRE) && /* Can be GRE encap */
@@ -1672,21 +1671,25 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
/* Skip IP and UDP/GRE tunnel headers */
offset = offset2 + ulen;
/* Now we should be at the original IP header */
- cih = skb_header_pointer(skb, offset, sizeof(_ciph),
- &_ciph);
- if (cih && cih->version == 4 && cih->ihl >= 5 &&
- iproto == IPPROTO_IPIP)
+ if (iproto == IPPROTO_IPIP)
tunnel = true;
else
return NF_ACCEPT;
}
}
- pd = ip_vs_proto_data_get(ipvs, cih->protocol);
+ if (!ip_vs_fill_iph_skb_icmp(AF_INET, skb, offset, !tunnel, &ciph))
+ return NF_ACCEPT;
+ pd = ip_vs_proto_data_get(ipvs, ciph.protocol);
if (!pd)
return NF_ACCEPT;
pp = pd->pp;
+ cih = skb_header_pointer(skb, offset, sizeof(_ciph), &_ciph);
+ if (!(cih && cih->version == 4 &&
+ ciph.len - ciph.off >= sizeof(struct iphdr)))
+ return NF_ACCEPT; /* The packet looks wrong, ignore */
+
/* Is the embedded protocol header present? */
if (unlikely(cih->frag_off & htons(IP_OFFSET) && !pp->dont_defrag))
return NF_ACCEPT;
@@ -1694,9 +1697,6 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
IP_VS_DBG_PKT(11, AF_INET, pp, skb, offset,
"Checking incoming ICMP for");
- offset2 = offset;
- ip_vs_fill_iph_skb_icmp(AF_INET, skb, offset, !tunnel, &ciph);
-
/* The embedded headers contain source and dest in reverse order.
* For IPIP/UDP/GRE tunnel this is error for request, not for reply.
*/
@@ -1726,11 +1726,12 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
}
if (tunnel) {
- unsigned int hlen_orig = cih->ihl * 4;
+ unsigned int hlen_orig = ciph.len - ciph.off;
__be32 info = ic->un.gateway;
__u8 type = ic->type;
__u8 code = ic->code;
+ offset2 = offset;
/* Update the MTU */
if (ic->type == ICMP_DEST_UNREACH &&
ic->code == ICMP_FRAG_NEEDED) {
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index b85420a3a14ce..240378e37741a 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -1577,7 +1577,7 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
if (skb_cow(skb, rt->dst.dev->hard_header_len))
goto tx_error;
- ip_vs_nat_icmp(skb, pp, cp, 0, toff, has_ports);
+ ip_vs_nat_icmp(skb, pp, cp, 0, toff, has_ports, ciph);
/* Another hack: avoid icmp_send in ip_fragment */
skb->ignore_df = 1;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 020/181] ipvs: return the csum validation for forward hook
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (18 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 019/181] ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 021/181] watchdog: bd96801_wdt: Fix timeout for enabled WDG Greg Kroah-Hartman
` (163 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Julian Anastasov, Pablo Neira Ayuso,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Julian Anastasov <ja@ssi.bg>
[ Upstream commit 99609cb0aa789c8d071050ce8579989551882cc6 ]
Sashiko notes that playing games with the skb dst and rt
flags instead of providing hooknum is not a good idea
when validating the checksums.
Also, skipping checksum validation for FORWARD packets
risk silent data corruption, even if the only user is
the FTP-CMD packets coming from the real server.
Sashiko also noticed that by using common checksum
helper in the previous commit we actually fixed old bug
where the TCP/UDP checksum for IPv6 on CHECKSUM_COMPLETE
was not validated correctly.
Fixes: e876b75b9020 ("ipvs: fix the checksum validations")
Link: https://sashiko.dev/#/patchset/20260722211420.153933-1-pablo%40netfilter.org
Link: https://sashiko.dev/#/patchset/20260727185024.67534-1-ja%40ssi.bg
Link: https://sashiko.dev/#/patchset/20260728202520.59179-1-ja%40ssi.bg
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/net/ip_vs.h | 19 +++++--------------
net/netfilter/ipvs/ip_vs_proto_sctp.c | 2 +-
2 files changed, 6 insertions(+), 15 deletions(-)
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 80110ec025002..1121845bcc2a6 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -24,9 +24,7 @@
#include <linux/netfilter.h> /* for union nf_inet_addr */
#include <linux/ip.h>
#include <linux/ipv6.h> /* for struct ipv6hdr */
-#include <net/route.h>
#include <net/ipv6.h>
-#include <net/ip6_fib.h>
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
#include <net/netfilter/nf_conntrack.h>
#endif
@@ -1740,30 +1738,23 @@ static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
return csum_partial(diff, sizeof(diff), oldsum);
}
-static inline bool ip_vs_checksum_needed(struct sk_buff *skb, int af)
+static inline bool ip_vs_checksum_needed(struct sk_buff *skb)
{
/* Checksum unnecessary or already validated? */
if (skb_csum_unnecessary(skb))
return false;
- /* LOCAL_OUT ? */
- if (!skb->dev || skb->dev->flags & IFF_LOOPBACK)
+ /* Locally generated ? */
+ if (!skb->dev)
return false;
- /* !LOCAL_IN (FORWARD) ? */
- if (af == AF_INET6) {
- if (!(dst_rt6_info(skb_dst(skb))->rt6i_flags & RTF_LOCAL))
- return false;
- } else {
- if (!(skb_rtable(skb)->rt_flags & RTCF_LOCAL))
- return false;
- }
return true;
}
static inline bool ip_vs_checksum_common_check(struct sk_buff *skb,
int offset, int proto, int af)
{
- if (!ip_vs_checksum_needed(skb, af))
+ if (!ip_vs_checksum_needed(skb))
return true;
+ /* Validate csum even for FORWARD */
return !nf_checksum(skb, NF_INET_LOCAL_IN, offset, proto, af);
}
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index 3dbd3096e1637..c80567c73469b 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -193,7 +193,7 @@ sctp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp,
struct sctphdr *sh;
__le32 cmp, val;
- if (!ip_vs_checksum_needed(skb, af))
+ if (!ip_vs_checksum_needed(skb))
return 1;
sh = (struct sctphdr *)(skb->data + sctphoff);
cmp = sh->checksum;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 021/181] watchdog: bd96801_wdt: Fix timeout for enabled WDG
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (19 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 020/181] ipvs: return the csum validation for forward hook Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 022/181] btrfs: fix memory leak in btrfs_do_encoded_write() Greg Kroah-Hartman
` (162 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Matti Vaittinen, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Matti Vaittinen <mazziesaccount@gmail.com>
[ Upstream commit 1246aa2b6ccc8944676bd24ff3e37cc56b93b51b ]
When watchdog is enabled at the probe time, the bd96801 driver retrieves
the timeout configuration from the registers to set-up the heart-beat
values.
As Sashiko pointed out at
https://lore.kernel.org/all/20260722085819.495211F000E9@smtp.kernel.org/
the timeout values are incorrectly computed in driver, resulting wrong
heartbeat. This leads to devere problems if watchdog was enabled at probe
time.
According to the data-sheet, the "too fast" ping limit is configured as
multiple of FASTNG_MIN. Furthermore, the "too slow" ping limit is
configured as multiples of "too fast" timeout. The FASTNG_MIN is set to
11, meaning 1.1 mS and "too fast" and "too slow" limits are computed from
this. Hence, converting the limits to mS should be done by dividing by 10,
not by dividing by USEC_PER_MSEC.
Fix this by dividing the timeout values with correct scaling factor.
While at it, fix whitespace problem (double empty line).
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Fixes: 09dad69757b6 ("watchdog: ROHM BD96801 PMIC WDG driver")
Link: https://lore.kernel.org/r/amxskHmQbi9v-8_l@mva-rohm
[groeck: Added reference to whitespace change to description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/watchdog/bd96801_wdt.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/watchdog/bd96801_wdt.c b/drivers/watchdog/bd96801_wdt.c
index 12b74fd2bc052..a25b7cf1488b2 100644
--- a/drivers/watchdog/bd96801_wdt.c
+++ b/drivers/watchdog/bd96801_wdt.c
@@ -169,7 +169,6 @@ static int bd96801_set_wdt_mode(struct wdtbd96801 *w, unsigned int hw_margin,
int fastng, slowng, type, ret, reg, mask;
struct device *dev = w->dev;
-
if (hw_margin_min * 1000 > FASTNG_MAX_US) {
dev_err(dev, "Unsupported fast timeout %u uS [max %u]\n",
hw_margin_min * 1000, FASTNG_MAX_US);
@@ -258,10 +257,10 @@ static int bd96801_set_heartbeat_from_hw(struct wdtbd96801 *w,
fast = FASTNG_MIN << sel;
sel = (val & BD96801_WD_RATIO_MASK) + 1;
- w->wdt.max_hw_heartbeat_ms = (fast << sel) / USEC_PER_MSEC;
+ w->wdt.max_hw_heartbeat_ms = (fast << sel) / 10;
if ((conf_reg & BD96801_WD_TYPE_MASK) == BD96801_WD_TYPE_WIN)
- w->wdt.min_hw_heartbeat_ms = fast / USEC_PER_MSEC;
+ w->wdt.min_hw_heartbeat_ms = fast / 10;
return 0;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 022/181] btrfs: fix memory leak in btrfs_do_encoded_write()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (20 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 021/181] watchdog: bd96801_wdt: Fix timeout for enabled WDG Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 023/181] bpf: Preserve pointer state for commuted arithmetic Greg Kroah-Hartman
` (161 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Filipe Manana, Dmitry Antipov,
David Sterba, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Antipov <dmantipov@yandex.ru>
[ Upstream commit d2a4e4e626b2f4670b69b430c357f03f53eb6632 ]
Local fuzzing of 6.12.94 has found the following memory leak:
Unreferenced object 0xffff888018050a80 (size 64):
comm "syz.0.17", pid 10297, jiffies 4294953601
hex dump (first 32 bytes):
00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................
10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff ................
backtrace (crc a8a6fc29):
kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
slab_post_alloc_hook mm/slub.c:4152 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
__kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358
kmalloc_noprof include/linux/slab.h:878 [inline]
extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline]
qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305
btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355
btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746
btrfs_encoded_write fs/btrfs/file.c:1482 [inline]
btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507
btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738
btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Unreferenced object 0xffff888018050a00 (size 64):
comm "syz.0.17", pid 10297, jiffies 4294953601
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00 ................
90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff ................
backtrace (crc cb5c9580):
kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
slab_post_alloc_hook mm/slub.c:4152 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
__kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358
kmalloc_noprof include/linux/slab.h:878 [inline]
kzalloc_noprof include/linux/slab.h:1014 [inline]
ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114
extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline]
__set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086
set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821
qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312
btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355
btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746
btrfs_encoded_write fs/btrfs/file.c:1482 [inline]
btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507
btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738
btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Fix this by freeing an extent changeset before returning from
btrfs_do_encoded_write().
Fixes: 7c0c7269f7b5 ("btrfs: add BTRFS_IOC_ENCODED_WRITE")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/btrfs/inode.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f60f8bf38dc50..ab7f19ca21457 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -9684,6 +9684,7 @@ ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from,
}
kvfree(folios);
out:
+ extent_changeset_free(data_reserved);
if (ret >= 0)
iocb->ki_pos += encoded->len;
return ret;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 023/181] bpf: Preserve pointer state for commuted arithmetic
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (21 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 022/181] btrfs: fix memory leak in btrfs_do_encoded_write() Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 024/181] net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler() Greg Kroah-Hartman
` (160 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Yiyang Chen, Daniel Wade,
Shung-Hsi Yu, Eduard Zingerman, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yiyang Chen <chenyy23@mails.tsinghua.edu.cn>
[ Upstream commit a4c6f804b44c5c790269b25e0e61cf4e9f117c86 ]
When scalar += pointer is handled in adjust_ptr_min_max_vals(), the
destination register inherits the pointer state from the source pointer.
Copying only selected fields is fragile because pointer provenance is
tracked by several bpf_reg_state fields.
Use the caller's temporary offset register to preserve the scalar operand
while replacing the destination with the full pointer state. This preserves
the frame number for PTR_TO_STACK registers and keeps parent identity
fields consistent.
Fixes: f4d7e40a5b71 ("bpf: introduce function calls (verification)")
Signed-off-by: Yiyang Chen <chenyy23@mails.tsinghua.edu.cn>
Tested-by: Daniel Wade <danjwade95@gmail.com>
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Link: https://patch.msgid.link/20260729-c3-035-public-bpf-v4-v4-2-8ee297e2346b@mails.tsinghua.edu.cn
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/bpf/verifier.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 77183b436da5e..275c9fabc955e 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -13565,11 +13565,12 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
return -EACCES;
}
- /* In case of 'scalar += pointer', dst_reg inherits pointer type and id.
- * The id may be overwritten later if we create a new variable offset.
+ /* For 'scalar += pointer', dst_reg inherits the complete pointer
+ * register state. Individual fields may be adjusted later by pointer
+ * arithmetic. Callers guarantee that below does not overwrite off_reg.
*/
- dst_reg->type = ptr_reg->type;
- dst_reg->id = ptr_reg->id;
+ if (dst_reg != ptr_reg)
+ *dst_reg = *ptr_reg;
if (!check_reg_sane_offset(env, off_reg, ptr_reg->type) ||
!check_reg_sane_offset(env, ptr_reg, ptr_reg->type))
@@ -13631,7 +13632,7 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
}
break;
case BPF_SUB:
- if (dst_reg == off_reg) {
+ if (dst_reg != ptr_reg) {
/* scalar -= pointer. Creates an unknown scalar */
verbose(env, "R%d tried to subtract pointer from scalar\n",
dst);
@@ -14490,8 +14491,8 @@ static int adjust_reg_min_max_vals(struct bpf_verifier_env *env,
err = mark_chain_precision(env, insn->dst_reg);
if (err)
return err;
- return adjust_ptr_min_max_vals(env, insn,
- src_reg, dst_reg);
+ off_reg = *dst_reg;
+ return adjust_ptr_min_max_vals(env, insn, src_reg, &off_reg);
}
} else if (ptr_reg) {
/* pointer += scalar */
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 024/181] net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (22 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 023/181] bpf: Preserve pointer state for commuted arithmetic Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:31 ` [PATCH 6.12 025/181] net/sched: cls_route: fix fastmap use-after-free on filter Greg Kroah-Hartman
` (159 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mahanta Jambigi, Hidayath Khan,
Sidraya Jayagond, Dust Li, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mahanta Jambigi <mjambigi@linux.ibm.com>
[ Upstream commit 976245094925bab9bc39366b2e9ab44ffcde61d0 ]
The SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in
smc_llc_event_handler() stores an incoming qentry into the local LLC flow
without first checking whether a qentry is already pending. If a malicious or
buggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is
active and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the
pointer without freeing the previous allocation, leaking one kmalloc-96 object
per spurious message.
The sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry
guard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a
duplicate message when qentry is already occupied falls through to break and is
freed by the kfree(qentry) at the out: label, rather than silently leaking the
existing allocation.
The response direction (smc_llc_rx_response()) is unaffected: it already guards
with flow->qentry at the equivalent site and drops duplicate responses
correctly.
Fixes: 0fb0b02bd6fd ("net/smc: adapt SMC client code to use the LLC flow")
Signed-off-by: Mahanta Jambigi <mjambigi@linux.ibm.com>
Reviewed-by: Hidayath Khan <hidayath@linux.ibm.com>
Reviewed-by: Sidraya Jayagond <sidraya@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Link: https://patch.msgid.link/20260729130153.970800-1-mjambigi@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/smc/smc_llc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c
index 018ce8133b026..149d63cff667e 100644
--- a/net/smc/smc_llc.c
+++ b/net/smc/smc_llc.c
@@ -1918,7 +1918,8 @@ static void smc_llc_event_handler(struct smc_llc_qentry *qentry)
return;
case SMC_LLC_CONFIRM_LINK:
case SMC_LLC_ADD_LINK_CONT:
- if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) {
+ if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE &&
+ !lgr->llc_flow_lcl.qentry) {
/* a flow is waiting for this message */
smc_llc_flow_qentry_set(&lgr->llc_flow_lcl, qentry);
wake_up(&lgr->llc_msg_waiter);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 025/181] net/sched: cls_route: fix fastmap use-after-free on filter
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (23 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 024/181] net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler() Greg Kroah-Hartman
@ 2026-08-17 13:31 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 026/181] net: hisilicon: hix5hd2_gmac: remove redundant NAPI delete Greg Kroah-Hartman
` (158 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:31 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, zdi-disclosures, Santosh Kalluri,
Paolo Abeni, Victor Nogueira, Jamal Hadi Salim, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jamal Hadi Salim <jhs@mojatatu.com>
[ Upstream commit 47d7f7051253bdc02b1d245d87e38f16d31a74df ]
The route4 classifier maintains a 16-slot fastmap cache that stores raw
struct route4_filter pointers indexed by (id, iif). The reader
(route4_classify) populates this cache via route4_set_fastmap() for every
classified packet that hits a filter. The writer (route4_delete,
route4_change) clears the cache via route4_reset_fastmap() before
RCU-deferred kfree of the filter.
This creates a UAF race:
1. Reader walks the RCU-protected bucket chain, finds filter f
2. Writer unlinks f, calls route4_reset_fastmap(), then tcf_queue_work()
3. Reader calls route4_set_fastmap() and writes f into the cache
*after* the writer's reset, caching a pointer about to be freed
4. After the RCU grace period, kfree(f) executes
5. Next classified packet on the same (id, iif) tuple hits the stale
fastmap entry and reads f->res from freed memory
Reproduced with an mdelay(100) accelerator in route4_set_fastmap() and a
concurrent add/delete stress test (provided by both zdi and Santosh).
Both triggered KASAN slab-use-after-free reports in the route4 fastmap
paths.
Fix:
Introduce a per-filter boolean dying flag to suppress stale fastmap
republishing by in-flight readers.
Fixes: 1109c00547fc ("net: sched: RCU cls_route")
Reported-by: zdi-disclosures@trendmicro.com
Reported-by: Santosh Kalluri <santosh.kalluri129@gmail.com>
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Tested-by: Victor Nogueira <victor@mojatatu.com>
Tested-by: Santosh Kalluri <santosh.kalluri129@gmail.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20260729094411.46257-1-jhs@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/sched/cls_route.c | 35 ++++++++++++++++++++++++++---------
1 file changed, 26 insertions(+), 9 deletions(-)
diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index b9c58c040c305..38469cdcb22d6 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -52,6 +52,7 @@ struct route4_filter {
struct tcf_result res;
struct tcf_exts exts;
u32 handle;
+ bool dying;
struct route4_bucket *bkt;
struct tcf_proto *tp;
struct rcu_work rwork;
@@ -66,9 +67,11 @@ static inline int route4_fastmap_hash(u32 id, int iif)
static DEFINE_SPINLOCK(fastmap_lock);
static void
-route4_reset_fastmap(struct route4_head *head)
+route4_reset_fastmap(struct route4_head *head, struct route4_filter *f)
{
spin_lock_bh(&fastmap_lock);
+ if (f)
+ f->dying = true;
memset(head->fastmap, 0, sizeof(head->fastmap));
spin_unlock_bh(&fastmap_lock);
}
@@ -81,9 +84,11 @@ route4_set_fastmap(struct route4_head *head, u32 id, int iif,
/* fastmap updates must look atomic to aling id, iff, filter */
spin_lock_bh(&fastmap_lock);
- head->fastmap[h].id = id;
- head->fastmap[h].iif = iif;
- head->fastmap[h].filter = f;
+ if (f == ROUTE4_FAILURE || !f->dying) {
+ head->fastmap[h].id = id;
+ head->fastmap[h].iif = iif;
+ head->fastmap[h].filter = f;
+ }
spin_unlock_bh(&fastmap_lock);
}
@@ -297,6 +302,13 @@ static void route4_destroy(struct tcf_proto *tp, bool rtnl_held,
next = rtnl_dereference(f->next);
RCU_INIT_POINTER(b->ht[h2], next);
tcf_unbind_filter(tp, &f->res);
+ /* Mark the filter dying under fastmap_lock so
+ * any in-flight reader that still holds it
+ * will skip the republish in route4_set_fastmap().
+ */
+ spin_lock_bh(&fastmap_lock);
+ f->dying = true;
+ spin_unlock_bh(&fastmap_lock);
if (tcf_exts_get_net(&f->exts))
route4_queue_work(f);
else
@@ -307,6 +319,11 @@ static void route4_destroy(struct tcf_proto *tp, bool rtnl_held,
kfree_rcu(b, rcu);
}
}
+
+ /* All filters are unlinked and marked dying, so no in-flight
+ * reader can republish a stale entry after this reset.
+ */
+ route4_reset_fastmap(head, NULL);
kfree_rcu(head, rcu);
}
@@ -334,11 +351,11 @@ static int route4_delete(struct tcf_proto *tp, void *arg, bool *last,
/* unlink it */
RCU_INIT_POINTER(*fp, rtnl_dereference(f->next));
- /* Remove any fastmap lookups that might ref filter
- * notice we unlink'd the filter so we can't get it
- * back in the fastmap.
+ /* Clear any fastmap entries that may ref this filter and
+ * mark it dying so in-flight readers can't republish it
+ * after the reset.
*/
- route4_reset_fastmap(head);
+ route4_reset_fastmap(head, f);
/* Delete it */
tcf_unbind_filter(tp, &f->res);
@@ -558,7 +575,7 @@ static int route4_change(struct net *net, struct sk_buff *in_skb,
}
}
- route4_reset_fastmap(head);
+ route4_reset_fastmap(head, fold);
*arg = f;
if (fold) {
tcf_unbind_filter(tp, &fold->res);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 026/181] net: hisilicon: hix5hd2_gmac: remove redundant NAPI delete
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (24 preceding siblings ...)
2026-08-17 13:31 ` [PATCH 6.12 025/181] net/sched: cls_route: fix fastmap use-after-free on filter Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 027/181] devlink: fix net namespace reference leak in reload Greg Kroah-Hartman
` (157 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jiawen Liu, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiawen Liu <1298662399@qq.com>
[ Upstream commit f307a7dc32097c11413178fca437a10d20890bc2 ]
hix5hd2_dev_remove() calls netif_napi_del() before unregister_netdev().
This is not needed because free_netdev() deletes all NAPI instances
attached to the net_device.
Remove the redundant call and let the networking core tear down the NAPI
instance during unregister_netdev(). The probe error path still keeps its
explicit netif_napi_del(), because the device has not been registered
there.
Fixes: 57c5bc9ad7d7 ("net: hisilicon: add hix5hd2 mac driver")
Signed-off-by: Jiawen Liu <1298662399@qq.com>
Link: https://patch.msgid.link/tencent_5FFD37A252B4FEA6A80AD25B17C8E904F005@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/hisilicon/hix5hd2_gmac.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
index 1a972b093a424..cc1d04d05e4b3 100644
--- a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
+++ b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
@@ -1282,7 +1282,6 @@ static void hix5hd2_dev_remove(struct platform_device *pdev)
struct net_device *ndev = platform_get_drvdata(pdev);
struct hix5hd2_priv *priv = netdev_priv(ndev);
- netif_napi_del(&priv->napi);
unregister_netdev(ndev);
mdiobus_unregister(priv->bus);
mdiobus_free(priv->bus);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 027/181] devlink: fix net namespace reference leak in reload
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (25 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 026/181] net: hisilicon: hix5hd2_gmac: remove redundant NAPI delete Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 028/181] net/mlx5: fw_tracer, return NULL on create error Greg Kroah-Hartman
` (156 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Or Har-Toov, Jiri Pirko,
Tariq Toukan, Antoine Tenart, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Or Har-Toov <ohartoov@nvidia.com>
[ Upstream commit 1c4dac9bf1d2ac31da63b794bdec697777cbd0fd ]
devlink_nl_reload_doit() calls devlink_netns_get(), which returns a net
with a held reference. When the requested namespace differs from the
current one and the reload action is not DRIVER_REINIT, the function
returns -EOPNOTSUPP without releasing the reference. Add the missing
put_net() on this error path.
Fixes: 2edd92570441 ("devlink: don't allow to change net namespace for FW_ACTIVATE reload action")
Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Link: https://patch.msgid.link/20260729080600.2427721-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/devlink/dev.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/devlink/dev.c b/net/devlink/dev.c
index 13c73f50da3d1..fc109acd4e844 100644
--- a/net/devlink/dev.c
+++ b/net/devlink/dev.c
@@ -579,6 +579,7 @@ int devlink_nl_reload_doit(struct sk_buff *skb, struct genl_info *info)
action != DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
NL_SET_ERR_MSG_MOD(info->extack,
"Changing namespace is only supported for reinit action");
+ put_net(dest_net);
return -EOPNOTSUPP;
}
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 028/181] net/mlx5: fw_tracer, return NULL on create error
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (26 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 027/181] devlink: fix net namespace reference leak in reload Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 029/181] counter: microchip-tcb-capture: Fix DT channel validation Greg Kroah-Hartman
` (155 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Michael Guralnik, Shay Drori,
Tariq Toukan, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Guralnik <michaelgur@nvidia.com>
[ Upstream commit af39eb111ce6b5eba9c08513b62c4868eb7e7fd5 ]
Tracer creation can fail by returning either NULL or ERR_PTR.
The return value is stored without a check on the device, and users
treat ERR_PTR and NULL the same way.
This also causes a crash in the core dump logic, which is missing the
ERR_PTR check and ends up dereferencing it, as shown in the trace below.
Switch tracer creation to return NULL on failure only, so callers only
need a single NULL check.
Internal error: Oops: 0000000096000006 [#1] SMP
Modules linked in: mlx5_ib ib_uverbs ib_core ipv6 mlx5_core
CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.19.7 #1 PREEMPT(none)
Workqueue: mlx5_health0001:01:00.0 mlx5_fw_reporter_err_work [mlx5_core]
pstate: a3400009 (NzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : mlx5_fw_tracer_trigger_core_dump_general+0x58/0xe0 [mlx5_core]
lr : mlx5_fw_tracer_trigger_core_dump_general+0x40/0xe0 [mlx5_core]
sp : ffff800081cf3c40
x29: ffff800081cf3c90 x28: 0000000000000000 x27: 0000000000000000
x26: ffff000080018828 x25: 0000000000000000 x24: ffff000080304a05
x23: ffff800081cf3d80 x22: ffff0000847e01a0 x21: 0000000000000000
x20: ffff0000847e01a0 x19: ffffffffffffffa1 x18: ffff80008310bbf0
x17: ffff800080119650 x16: ffff80008010df54 x15: ffff80008010d4ac
x14: ffff800079c202e4 x13: ffff80008002fe60 x12: ffff800080119650
x11: ffff80008010df54 x10: ffff80008010d4ac x9 : ffff800079c203d8
x8 : ffff800081cf3c88 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000008 x3 : 0000000000000030
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 00000000c5c4000e
Call trace:
mlx5_fw_tracer_trigger_core_dump_general+0x58/0xe0 [mlx5_core] (P)
mlx5_fw_reporter_dump+0x30/0x2e0 [mlx5_core]
devlink_health_do_dump+0x9c/0x160
devlink_health_report+0x1c0/0x288
mlx5_fw_reporter_err_work+0xac/0xc0 [mlx5_core]
process_one_work+0x15c/0x3d8
worker_thread+0x18c/0x320
kthread+0x148/0x228
ret_from_fork+0x10/0x20
Code: b9400000 5ac00800 7a401800 540003ca (3940a260)
---[ end trace 0000000000000000 ]---
Kernel panic - not syncing: Oops: Fatal exception
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x000000,00078031,75fce5a1,35fffe67
Memory Limit: none
---[ end Kernel panic - not syncing: Oops: Fatal exception ]---
Fixes: fd1483fe1f9f ("net/mlx5: Add support for FW reporter dump")
Signed-off-by: Michael Guralnik <michaelgur@nvidia.com>
Reviewed-by: Shay Drori <shayd@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260729080402.2427184-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../ethernet/mellanox/mlx5/core/diag/fw_tracer.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
index 0b82a6a133d6c..74f68b70ad1c1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
@@ -1025,13 +1025,11 @@ struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev)
tracer = kvzalloc(sizeof(*tracer), GFP_KERNEL);
if (!tracer)
- return ERR_PTR(-ENOMEM);
+ return NULL;
tracer->work_queue = create_singlethread_workqueue("mlx5_fw_tracer");
- if (!tracer->work_queue) {
- err = -ENOMEM;
+ if (!tracer->work_queue)
goto free_tracer;
- }
tracer->dev = dev;
@@ -1073,7 +1071,7 @@ struct mlx5_fw_tracer *mlx5_fw_tracer_create(struct mlx5_core_dev *dev)
destroy_workqueue(tracer->work_queue);
free_tracer:
kvfree(tracer);
- return ERR_PTR(err);
+ return NULL;
}
static int fw_tracer_event(struct notifier_block *nb, unsigned long action, void *data);
@@ -1084,7 +1082,7 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
struct mlx5_core_dev *dev;
int err;
- if (IS_ERR_OR_NULL(tracer))
+ if (!tracer)
return 0;
if (!tracer->str_db.loaded)
@@ -1134,7 +1132,7 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
/* Stop tracer + Cleanup HW resources */
void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer)
{
- if (IS_ERR_OR_NULL(tracer))
+ if (!tracer)
return;
mutex_lock(&tracer->state_lock);
@@ -1163,7 +1161,7 @@ void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer)
/* Free software resources (Buffers, etc ..) */
void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer)
{
- if (IS_ERR_OR_NULL(tracer))
+ if (!tracer)
return;
mlx5_core_dbg(tracer->dev, "FWTracer: Destroy\n");
@@ -1215,7 +1213,7 @@ int mlx5_fw_tracer_reload(struct mlx5_fw_tracer *tracer)
struct mlx5_core_dev *dev;
int err;
- if (IS_ERR_OR_NULL(tracer))
+ if (!tracer)
return 0;
dev = tracer->dev;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 029/181] counter: microchip-tcb-capture: Fix DT channel validation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (27 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 028/181] net/mlx5: fw_tracer, return NULL on create error Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 030/181] bpf: tcp: Make mem flags configurable through bpf_iter_tcp_realloc_batch Greg Kroah-Hartman
` (154 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Babanpreet Singh, Joshua Crofts,
William Breathitt Gray, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Babanpreet Singh <bbnpreetsingh@gmail.com>
[ Upstream commit f1a3a9946aab611dd2200c01ff122f64b033dad2 ]
mchp_tc_probe() reads the devicetree "reg" cell - a u32, per the API
contract of of_property_read_u32_index() - into a signed int, so the
bounds check "channel > 2" fails to reject cell values at or above
0x80000000: reinterpreted as a negative int, they compare below 2 and
pass validation.
A malformed devicetree can therefore drive a negative channel into the
ATMEL_TC_REG() offset arithmetic, making the driver access syscon
regmap offsets outside the TC block's register window, and into the
"t%d_clk" clock-name formatting, where it truncates clk_name (sized
for "t0_clk".."t2_clk").
Declare channel as u32, matching the API contract; the unsigned
comparison then rejects everything except channels 0..2. Adjust the
format specifier to %u accordingly, which also resolves the W=1
warning that exposed the gap:
microchip-tcb-capture.c:520:56: warning: '%d' directive output may
be truncated writing between 1 and 11 bytes into a region of size
6 [-Wformat-truncation=]
note: directive argument in the range [-2147483648, 2]
No behavior change for well-formed devicetrees: channels 0..2 take
identical paths before and after.
Fixes: 106b104137fd ("counter: Add microchip TCB capture counter")
Assisted-by: Claude:claude-fable-5 [gcc W=1]
Signed-off-by: Babanpreet Singh <bbnpreetsingh@gmail.com>
Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
Link: https://lore.kernel.org/r/20260714042910.7-1-bbnpreetsingh@gmail.com
Signed-off-by: William Breathitt Gray <wbg@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/counter/microchip-tcb-capture.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c
index 461f57f66631c..fbd1afe178a36 100644
--- a/drivers/counter/microchip-tcb-capture.c
+++ b/drivers/counter/microchip-tcb-capture.c
@@ -309,7 +309,7 @@ static int mchp_tc_probe(struct platform_device *pdev)
char clk_name[7];
struct regmap *regmap;
struct clk *clk[3];
- int channel;
+ u32 channel;
int ret, i;
counter = devm_counter_alloc(&pdev->dev, sizeof(*priv));
@@ -343,7 +343,7 @@ static int mchp_tc_probe(struct platform_device *pdev)
priv->channel[i] = channel;
- snprintf(clk_name, sizeof(clk_name), "t%d_clk", channel);
+ snprintf(clk_name, sizeof(clk_name), "t%u_clk", channel);
clk[i] = of_clk_get_by_name(np->parent, clk_name);
if (IS_ERR(clk[i])) {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 030/181] bpf: tcp: Make mem flags configurable through bpf_iter_tcp_realloc_batch
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (28 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 029/181] counter: microchip-tcb-capture: Fix DT channel validation Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 031/181] bpf: tcp: Make sure iter->batch always contains a full bucket snapshot Greg Kroah-Hartman
` (153 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jordan Rife, Martin KaFai Lau,
Kuniyuki Iwashima, Stanislav Fomichev, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Rife <jordan@jrife.io>
[ Upstream commit 8271bec9fc1cfe522b1a18cacbefd6712a3d41c2 ]
Prepare for the next patch which needs to be able to choose either
GFP_USER or GFP_NOWAIT for calls to bpf_iter_tcp_realloc_batch.
Signed-off-by: Jordan Rife <jordan@jrife.io>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Stable-dep-of: e5fd3f514e27 ("bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_ipv4.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index a9f3ee89302ce..cffa0fc1ae6e1 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3032,12 +3032,12 @@ static void bpf_iter_tcp_put_batch(struct bpf_tcp_iter_state *iter)
}
static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
- unsigned int new_batch_sz)
+ unsigned int new_batch_sz, gfp_t flags)
{
struct sock **new_batch;
new_batch = kvmalloc(sizeof(*new_batch) * new_batch_sz,
- GFP_USER | __GFP_NOWARN);
+ flags | __GFP_NOWARN);
if (!new_batch)
return -ENOMEM;
@@ -3149,7 +3149,8 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
return sk;
}
- if (!resized && !bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2)) {
+ if (!resized && !bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2,
+ GFP_USER)) {
resized = true;
goto again;
}
@@ -3578,7 +3579,7 @@ static int bpf_iter_init_tcp(void *priv_data, struct bpf_iter_aux_info *aux)
if (err)
return err;
- err = bpf_iter_tcp_realloc_batch(iter, INIT_BATCH_SZ);
+ err = bpf_iter_tcp_realloc_batch(iter, INIT_BATCH_SZ, GFP_USER);
if (err) {
bpf_iter_fini_seq_net(priv_data);
return err;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 031/181] bpf: tcp: Make sure iter->batch always contains a full bucket snapshot
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (29 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 030/181] bpf: tcp: Make mem flags configurable through bpf_iter_tcp_realloc_batch Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 032/181] bpf: tcp: Get rid of st_bucket_done Greg Kroah-Hartman
` (152 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jordan Rife, Martin KaFai Lau,
Kuniyuki Iwashima, Stanislav Fomichev, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Rife <jordan@jrife.io>
[ Upstream commit cdec67a489d4fdae3e83e04fca0419136a83c4c2 ]
Require that iter->batch always contains a full bucket snapshot. This
invariant is important to avoid skipping or repeating sockets during
iteration when combined with the next few patches. Before, there were
two cases where a call to bpf_iter_tcp_batch may only capture part of a
bucket:
1. When bpf_iter_tcp_realloc_batch() returns -ENOMEM.
2. When more sockets are added to the bucket while calling
bpf_iter_tcp_realloc_batch(), making the updated batch size
insufficient.
In cases where the batch size only covers part of a bucket, it is
possible to forget which sockets were already visited, especially if we
have to process a bucket in more than two batches. This forces us to
choose between repeating or skipping sockets, so don't allow this:
1. Stop iteration and propagate -ENOMEM up to userspace if reallocation
fails instead of continuing with a partial batch.
2. Try bpf_iter_tcp_realloc_batch() with GFP_USER just as before, but if
we still aren't able to capture the full bucket, call
bpf_iter_tcp_realloc_batch() again while holding the bucket lock to
guarantee the bucket does not change. On the second attempt use
GFP_NOWAIT since we hold onto the spin lock.
I did some manual testing to exercise the code paths where GFP_NOWAIT is
used and where ERR_PTR(err) is returned. I used the realloc test cases
included later in this series to trigger a scenario where a realloc
happens inside bpf_iter_tcp_batch and made a small code tweak to force
the first realloc attempt to allocate a too-small batch, thus requiring
another attempt with GFP_NOWAIT. Some printks showed both reallocs with
the tests passing:
Jun 27 00:00:53 crow kernel: again GFP_USER
Jun 27 00:00:53 crow kernel: again GFP_NOWAIT
Jun 27 00:00:53 crow kernel: again GFP_USER
Jun 27 00:00:53 crow kernel: again GFP_NOWAIT
With this setup, I also forced each of the bpf_iter_tcp_realloc_batch
calls to return -ENOMEM to ensure that iteration ends and that the
read() in userspace fails.
Signed-off-by: Jordan Rife <jordan@jrife.io>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Stable-dep-of: e5fd3f514e27 ("bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_ipv4.c | 109 +++++++++++++++++++++++++++++++-------------
1 file changed, 77 insertions(+), 32 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index cffa0fc1ae6e1..2bcc037521930 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3041,7 +3041,7 @@ static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
if (!new_batch)
return -ENOMEM;
- bpf_iter_tcp_put_batch(iter);
+ memcpy(new_batch, iter->batch, sizeof(*iter->batch) * iter->end_sk);
kvfree(iter->batch);
iter->batch = new_batch;
iter->max_sk = new_batch_sz;
@@ -3050,69 +3050,95 @@ static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
}
static unsigned int bpf_iter_tcp_listening_batch(struct seq_file *seq,
- struct sock *start_sk)
+ struct sock **start_sk)
{
- struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
struct bpf_tcp_iter_state *iter = seq->private;
- struct tcp_iter_state *st = &iter->state;
struct hlist_nulls_node *node;
unsigned int expected = 1;
struct sock *sk;
- sock_hold(start_sk);
- iter->batch[iter->end_sk++] = start_sk;
+ sock_hold(*start_sk);
+ iter->batch[iter->end_sk++] = *start_sk;
- sk = sk_nulls_next(start_sk);
+ sk = sk_nulls_next(*start_sk);
+ *start_sk = NULL;
sk_nulls_for_each_from(sk, node) {
if (seq_sk_match(seq, sk)) {
if (iter->end_sk < iter->max_sk) {
sock_hold(sk);
iter->batch[iter->end_sk++] = sk;
+ } else if (!*start_sk) {
+ /* Remember where we left off. */
+ *start_sk = sk;
}
expected++;
}
}
- spin_unlock(&hinfo->lhash2[st->bucket].lock);
return expected;
}
static unsigned int bpf_iter_tcp_established_batch(struct seq_file *seq,
- struct sock *start_sk)
+ struct sock **start_sk)
{
- struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
struct bpf_tcp_iter_state *iter = seq->private;
- struct tcp_iter_state *st = &iter->state;
struct hlist_nulls_node *node;
unsigned int expected = 1;
struct sock *sk;
- sock_hold(start_sk);
- iter->batch[iter->end_sk++] = start_sk;
+ sock_hold(*start_sk);
+ iter->batch[iter->end_sk++] = *start_sk;
- sk = sk_nulls_next(start_sk);
+ sk = sk_nulls_next(*start_sk);
+ *start_sk = NULL;
sk_nulls_for_each_from(sk, node) {
if (seq_sk_match(seq, sk)) {
if (iter->end_sk < iter->max_sk) {
sock_hold(sk);
iter->batch[iter->end_sk++] = sk;
+ } else if (!*start_sk) {
+ /* Remember where we left off. */
+ *start_sk = sk;
}
expected++;
}
}
- spin_unlock_bh(inet_ehash_lockp(hinfo, st->bucket));
return expected;
}
+static unsigned int bpf_iter_fill_batch(struct seq_file *seq,
+ struct sock **start_sk)
+{
+ struct bpf_tcp_iter_state *iter = seq->private;
+ struct tcp_iter_state *st = &iter->state;
+
+ if (st->state == TCP_SEQ_STATE_LISTENING)
+ return bpf_iter_tcp_listening_batch(seq, start_sk);
+ else
+ return bpf_iter_tcp_established_batch(seq, start_sk);
+}
+
+static void bpf_iter_tcp_unlock_bucket(struct seq_file *seq)
+{
+ struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
+ struct bpf_tcp_iter_state *iter = seq->private;
+ struct tcp_iter_state *st = &iter->state;
+
+ if (st->state == TCP_SEQ_STATE_LISTENING)
+ spin_unlock(&hinfo->lhash2[st->bucket].lock);
+ else
+ spin_unlock_bh(inet_ehash_lockp(hinfo, st->bucket));
+}
+
static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
{
struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
struct bpf_tcp_iter_state *iter = seq->private;
struct tcp_iter_state *st = &iter->state;
unsigned int expected;
- bool resized = false;
struct sock *sk;
+ int err;
/* The st->bucket is done. Directly advance to the next
* bucket instead of having the tcp_seek_last_pos() to skip
@@ -3129,33 +3155,52 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
}
}
-again:
- /* Get a new batch */
iter->cur_sk = 0;
iter->end_sk = 0;
- iter->st_bucket_done = false;
+ iter->st_bucket_done = true;
sk = tcp_seek_last_pos(seq);
if (!sk)
return NULL; /* Done */
- if (st->state == TCP_SEQ_STATE_LISTENING)
- expected = bpf_iter_tcp_listening_batch(seq, sk);
- else
- expected = bpf_iter_tcp_established_batch(seq, sk);
+ expected = bpf_iter_fill_batch(seq, &sk);
+ if (likely(iter->end_sk == expected))
+ goto done;
- if (iter->end_sk == expected) {
- iter->st_bucket_done = true;
- return sk;
- }
+ /* Batch size was too small. */
+ bpf_iter_tcp_unlock_bucket(seq);
+ bpf_iter_tcp_put_batch(iter);
+ err = bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2,
+ GFP_USER);
+ if (err)
+ return ERR_PTR(err);
+
+ iter->cur_sk = 0;
+ iter->end_sk = 0;
+
+ sk = tcp_seek_last_pos(seq);
+ if (!sk)
+ return NULL; /* Done */
+
+ expected = bpf_iter_fill_batch(seq, &sk);
+ if (likely(iter->end_sk == expected))
+ goto done;
- if (!resized && !bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2,
- GFP_USER)) {
- resized = true;
- goto again;
+ /* Batch size was still too small. Hold onto the lock while we try
+ * again with a larger batch to make sure the current bucket's size
+ * does not change in the meantime.
+ */
+ err = bpf_iter_tcp_realloc_batch(iter, expected, GFP_NOWAIT);
+ if (err) {
+ bpf_iter_tcp_unlock_bucket(seq);
+ return ERR_PTR(err);
}
- return sk;
+ expected = bpf_iter_fill_batch(seq, &sk);
+ WARN_ON_ONCE(iter->end_sk != expected);
+done:
+ bpf_iter_tcp_unlock_bucket(seq);
+ return iter->batch[0];
}
static void *bpf_iter_tcp_seq_start(struct seq_file *seq, loff_t *pos)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 032/181] bpf: tcp: Get rid of st_bucket_done
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (30 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 031/181] bpf: tcp: Make sure iter->batch always contains a full bucket snapshot Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 033/181] bpf: tcp: Use bpf_tcp_iter_batch_item for bpf_tcp_iter_state batch items Greg Kroah-Hartman
` (151 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jordan Rife, Martin KaFai Lau,
Kuniyuki Iwashima, Stanislav Fomichev, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Rife <jordan@jrife.io>
[ Upstream commit e25ab9b874a4bd8c6e3e5ce66cbe8a1dd4096e2e ]
Get rid of the st_bucket_done field to simplify TCP iterator state and
logic. Before, st_bucket_done could be false if bpf_iter_tcp_batch
returned a partial batch; however, with the last patch ("bpf: tcp: Make
sure iter->batch always contains a full bucket snapshot"),
st_bucket_done == true is equivalent to iter->cur_sk == iter->end_sk.
Signed-off-by: Jordan Rife <jordan@jrife.io>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Stable-dep-of: e5fd3f514e27 ("bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_ipv4.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 2bcc037521930..c18eee7ed5378 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3004,7 +3004,6 @@ struct bpf_tcp_iter_state {
unsigned int end_sk;
unsigned int max_sk;
struct sock **batch;
- bool st_bucket_done;
};
struct bpf_iter__tcp {
@@ -3027,8 +3026,10 @@ static int tcp_prog_seq_show(struct bpf_prog *prog, struct bpf_iter_meta *meta,
static void bpf_iter_tcp_put_batch(struct bpf_tcp_iter_state *iter)
{
- while (iter->cur_sk < iter->end_sk)
- sock_gen_put(iter->batch[iter->cur_sk++]);
+ unsigned int cur_sk = iter->cur_sk;
+
+ while (cur_sk < iter->end_sk)
+ sock_gen_put(iter->batch[cur_sk++]);
}
static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
@@ -3145,7 +3146,7 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
* one by one in the current bucket and eventually find out
* it has to advance to the next bucket.
*/
- if (iter->st_bucket_done) {
+ if (iter->end_sk && iter->cur_sk == iter->end_sk) {
st->offset = 0;
st->bucket++;
if (st->state == TCP_SEQ_STATE_LISTENING &&
@@ -3157,7 +3158,6 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
iter->cur_sk = 0;
iter->end_sk = 0;
- iter->st_bucket_done = true;
sk = tcp_seek_last_pos(seq);
if (!sk)
@@ -3305,10 +3305,8 @@ static void bpf_iter_tcp_seq_stop(struct seq_file *seq, void *v)
(void)tcp_prog_seq_show(prog, &meta, v, 0);
}
- if (iter->cur_sk < iter->end_sk) {
+ if (iter->cur_sk < iter->end_sk)
bpf_iter_tcp_put_batch(iter);
- iter->st_bucket_done = false;
- }
}
static const struct seq_operations bpf_iter_tcp_seq_ops = {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 033/181] bpf: tcp: Use bpf_tcp_iter_batch_item for bpf_tcp_iter_state batch items
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (31 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 032/181] bpf: tcp: Get rid of st_bucket_done Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 034/181] bpf: tcp: Avoid socket skips and repeats during iteration Greg Kroah-Hartman
` (150 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jordan Rife, Martin KaFai Lau,
Kuniyuki Iwashima, Stanislav Fomichev, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Rife <jordan@jrife.io>
[ Upstream commit efeb820951ebf3778830256496ff72d00d135310 ]
Prepare for the next patch that tracks cookies between iterations by
converting struct sock **batch to union bpf_tcp_iter_batch_item *batch
inside struct bpf_tcp_iter_state.
Signed-off-by: Jordan Rife <jordan@jrife.io>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Stable-dep-of: e5fd3f514e27 ("bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_ipv4.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index c18eee7ed5378..6a8241367672b 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2998,12 +2998,16 @@ static int tcp4_seq_show(struct seq_file *seq, void *v)
}
#ifdef CONFIG_BPF_SYSCALL
+union bpf_tcp_iter_batch_item {
+ struct sock *sk;
+};
+
struct bpf_tcp_iter_state {
struct tcp_iter_state state;
unsigned int cur_sk;
unsigned int end_sk;
unsigned int max_sk;
- struct sock **batch;
+ union bpf_tcp_iter_batch_item *batch;
};
struct bpf_iter__tcp {
@@ -3029,13 +3033,13 @@ static void bpf_iter_tcp_put_batch(struct bpf_tcp_iter_state *iter)
unsigned int cur_sk = iter->cur_sk;
while (cur_sk < iter->end_sk)
- sock_gen_put(iter->batch[cur_sk++]);
+ sock_gen_put(iter->batch[cur_sk++].sk);
}
static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
unsigned int new_batch_sz, gfp_t flags)
{
- struct sock **new_batch;
+ union bpf_tcp_iter_batch_item *new_batch;
new_batch = kvmalloc(sizeof(*new_batch) * new_batch_sz,
flags | __GFP_NOWARN);
@@ -3059,7 +3063,7 @@ static unsigned int bpf_iter_tcp_listening_batch(struct seq_file *seq,
struct sock *sk;
sock_hold(*start_sk);
- iter->batch[iter->end_sk++] = *start_sk;
+ iter->batch[iter->end_sk++].sk = *start_sk;
sk = sk_nulls_next(*start_sk);
*start_sk = NULL;
@@ -3067,7 +3071,7 @@ static unsigned int bpf_iter_tcp_listening_batch(struct seq_file *seq,
if (seq_sk_match(seq, sk)) {
if (iter->end_sk < iter->max_sk) {
sock_hold(sk);
- iter->batch[iter->end_sk++] = sk;
+ iter->batch[iter->end_sk++].sk = sk;
} else if (!*start_sk) {
/* Remember where we left off. */
*start_sk = sk;
@@ -3088,7 +3092,7 @@ static unsigned int bpf_iter_tcp_established_batch(struct seq_file *seq,
struct sock *sk;
sock_hold(*start_sk);
- iter->batch[iter->end_sk++] = *start_sk;
+ iter->batch[iter->end_sk++].sk = *start_sk;
sk = sk_nulls_next(*start_sk);
*start_sk = NULL;
@@ -3096,7 +3100,7 @@ static unsigned int bpf_iter_tcp_established_batch(struct seq_file *seq,
if (seq_sk_match(seq, sk)) {
if (iter->end_sk < iter->max_sk) {
sock_hold(sk);
- iter->batch[iter->end_sk++] = sk;
+ iter->batch[iter->end_sk++].sk = sk;
} else if (!*start_sk) {
/* Remember where we left off. */
*start_sk = sk;
@@ -3200,7 +3204,7 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
WARN_ON_ONCE(iter->end_sk != expected);
done:
bpf_iter_tcp_unlock_bucket(seq);
- return iter->batch[0];
+ return iter->batch[0].sk;
}
static void *bpf_iter_tcp_seq_start(struct seq_file *seq, loff_t *pos)
@@ -3235,11 +3239,11 @@ static void *bpf_iter_tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
* st->bucket. See tcp_seek_last_pos().
*/
st->offset++;
- sock_gen_put(iter->batch[iter->cur_sk++]);
+ sock_gen_put(iter->batch[iter->cur_sk++].sk);
}
if (iter->cur_sk < iter->end_sk)
- sk = iter->batch[iter->cur_sk];
+ sk = iter->batch[iter->cur_sk].sk;
else
sk = bpf_iter_tcp_batch(seq);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 034/181] bpf: tcp: Avoid socket skips and repeats during iteration
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (32 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 033/181] bpf: tcp: Use bpf_tcp_iter_batch_item for bpf_tcp_iter_state batch items Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 035/181] bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch() Greg Kroah-Hartman
` (149 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jordan Rife, Martin KaFai Lau,
Stanislav Fomichev, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Rife <jordan@jrife.io>
[ Upstream commit f5080f612a1c587bf636bb23d2a2f4de276d60e4 ]
Replace the offset-based approach for tracking progress through a bucket
in the TCP table with one based on socket cookies. Remember the cookies
of unprocessed sockets from the last batch and use this list to
pick up where we left off or, in the case that the next socket
disappears between reads, find the first socket after that point that
still exists in the bucket and resume from there.
This approach guarantees that all sockets that existed when iteration
began and continue to exist throughout will be visited exactly once.
Sockets that are added to the table during iteration may or may not be
seen, but if they are they will be seen exactly once.
Signed-off-by: Jordan Rife <jordan@jrife.io>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Stable-dep-of: e5fd3f514e27 ("bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_ipv4.c | 147 ++++++++++++++++++++++++++++++++++----------
1 file changed, 115 insertions(+), 32 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 6a8241367672b..7785c177f2cd3 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -58,6 +58,7 @@
#include <linux/times.h>
#include <linux/slab.h>
#include <linux/sched.h>
+#include <linux/sock_diag.h>
#include <net/net_namespace.h>
#include <net/icmp.h>
@@ -3000,6 +3001,7 @@ static int tcp4_seq_show(struct seq_file *seq, void *v)
#ifdef CONFIG_BPF_SYSCALL
union bpf_tcp_iter_batch_item {
struct sock *sk;
+ __u64 cookie;
};
struct bpf_tcp_iter_state {
@@ -3030,10 +3032,19 @@ static int tcp_prog_seq_show(struct bpf_prog *prog, struct bpf_iter_meta *meta,
static void bpf_iter_tcp_put_batch(struct bpf_tcp_iter_state *iter)
{
+ union bpf_tcp_iter_batch_item *item;
unsigned int cur_sk = iter->cur_sk;
+ __u64 cookie;
- while (cur_sk < iter->end_sk)
- sock_gen_put(iter->batch[cur_sk++].sk);
+ /* Remember the cookies of the sockets we haven't seen yet, so we can
+ * pick up where we left off next time around.
+ */
+ while (cur_sk < iter->end_sk) {
+ item = &iter->batch[cur_sk++];
+ cookie = sock_gen_cookie(item->sk);
+ sock_gen_put(item->sk);
+ item->cookie = cookie;
+ }
}
static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
@@ -3054,6 +3065,106 @@ static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,
return 0;
}
+static struct sock *bpf_iter_tcp_resume_bucket(struct sock *first_sk,
+ union bpf_tcp_iter_batch_item *cookies,
+ int n_cookies)
+{
+ struct hlist_nulls_node *node;
+ struct sock *sk;
+ int i;
+
+ for (i = 0; i < n_cookies; i++) {
+ sk = first_sk;
+ sk_nulls_for_each_from(sk, node)
+ if (cookies[i].cookie == atomic64_read(&sk->sk_cookie))
+ return sk;
+ }
+
+ return NULL;
+}
+
+static struct sock *bpf_iter_tcp_resume_listening(struct seq_file *seq)
+{
+ struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
+ struct bpf_tcp_iter_state *iter = seq->private;
+ struct tcp_iter_state *st = &iter->state;
+ unsigned int find_cookie = iter->cur_sk;
+ unsigned int end_cookie = iter->end_sk;
+ int resume_bucket = st->bucket;
+ struct sock *sk;
+
+ if (end_cookie && find_cookie == end_cookie)
+ ++st->bucket;
+
+ sk = listening_get_first(seq);
+ iter->cur_sk = 0;
+ iter->end_sk = 0;
+
+ if (sk && st->bucket == resume_bucket && end_cookie) {
+ sk = bpf_iter_tcp_resume_bucket(sk, &iter->batch[find_cookie],
+ end_cookie - find_cookie);
+ if (!sk) {
+ spin_unlock(&hinfo->lhash2[st->bucket].lock);
+ ++st->bucket;
+ sk = listening_get_first(seq);
+ }
+ }
+
+ return sk;
+}
+
+static struct sock *bpf_iter_tcp_resume_established(struct seq_file *seq)
+{
+ struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
+ struct bpf_tcp_iter_state *iter = seq->private;
+ struct tcp_iter_state *st = &iter->state;
+ unsigned int find_cookie = iter->cur_sk;
+ unsigned int end_cookie = iter->end_sk;
+ int resume_bucket = st->bucket;
+ struct sock *sk;
+
+ if (end_cookie && find_cookie == end_cookie)
+ ++st->bucket;
+
+ sk = established_get_first(seq);
+ iter->cur_sk = 0;
+ iter->end_sk = 0;
+
+ if (sk && st->bucket == resume_bucket && end_cookie) {
+ sk = bpf_iter_tcp_resume_bucket(sk, &iter->batch[find_cookie],
+ end_cookie - find_cookie);
+ if (!sk) {
+ spin_unlock_bh(inet_ehash_lockp(hinfo, st->bucket));
+ ++st->bucket;
+ sk = established_get_first(seq);
+ }
+ }
+
+ return sk;
+}
+
+static struct sock *bpf_iter_tcp_resume(struct seq_file *seq)
+{
+ struct bpf_tcp_iter_state *iter = seq->private;
+ struct tcp_iter_state *st = &iter->state;
+ struct sock *sk = NULL;
+
+ switch (st->state) {
+ case TCP_SEQ_STATE_LISTENING:
+ sk = bpf_iter_tcp_resume_listening(seq);
+ if (sk)
+ break;
+ st->bucket = 0;
+ st->state = TCP_SEQ_STATE_ESTABLISHED;
+ fallthrough;
+ case TCP_SEQ_STATE_ESTABLISHED:
+ sk = bpf_iter_tcp_resume_established(seq);
+ break;
+ }
+
+ return sk;
+}
+
static unsigned int bpf_iter_tcp_listening_batch(struct seq_file *seq,
struct sock **start_sk)
{
@@ -3138,32 +3249,12 @@ static void bpf_iter_tcp_unlock_bucket(struct seq_file *seq)
static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
{
- struct inet_hashinfo *hinfo = seq_file_net(seq)->ipv4.tcp_death_row.hashinfo;
struct bpf_tcp_iter_state *iter = seq->private;
- struct tcp_iter_state *st = &iter->state;
unsigned int expected;
struct sock *sk;
int err;
- /* The st->bucket is done. Directly advance to the next
- * bucket instead of having the tcp_seek_last_pos() to skip
- * one by one in the current bucket and eventually find out
- * it has to advance to the next bucket.
- */
- if (iter->end_sk && iter->cur_sk == iter->end_sk) {
- st->offset = 0;
- st->bucket++;
- if (st->state == TCP_SEQ_STATE_LISTENING &&
- st->bucket > hinfo->lhash2_mask) {
- st->state = TCP_SEQ_STATE_ESTABLISHED;
- st->bucket = 0;
- }
- }
-
- iter->cur_sk = 0;
- iter->end_sk = 0;
-
- sk = tcp_seek_last_pos(seq);
+ sk = bpf_iter_tcp_resume(seq);
if (!sk)
return NULL; /* Done */
@@ -3179,10 +3270,7 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
if (err)
return ERR_PTR(err);
- iter->cur_sk = 0;
- iter->end_sk = 0;
-
- sk = tcp_seek_last_pos(seq);
+ sk = bpf_iter_tcp_resume(seq);
if (!sk)
return NULL; /* Done */
@@ -3234,11 +3322,6 @@ static void *bpf_iter_tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
* meta.seq_num is used instead.
*/
st->num++;
- /* Move st->offset to the next sk in the bucket such that
- * the future start() will resume at st->offset in
- * st->bucket. See tcp_seek_last_pos().
- */
- st->offset++;
sock_gen_put(iter->batch[iter->cur_sk++].sk);
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 035/181] bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (33 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 034/181] bpf: tcp: Avoid socket skips and repeats during iteration Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 036/181] vhost/vdpa: reject overflowing PA map page counts on 32-bit Greg Kroah-Hartman
` (148 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jose Fernandez (Anthropic),
Kuniyuki Iwashima, Kumar Kartikeya Dwivedi, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jose Fernandez (Anthropic) <jose.fernandez@linux.dev>
[ Upstream commit e5fd3f514e27db1f05fbd72ba615d74941e23c51 ]
reqsk_queue_hash_req() publishes a TCP_NEW_SYN_RECV request_sock onto
the ehash chain, drops the bucket lock, and only afterwards sets
rsk_refcnt to 3.
Lockless readers such as __inet_lookup_established() handle this with
refcount_inc_not_zero(), but bpf_iter_tcp_established_batch() uses plain
sock_hold() while holding the bucket lock, on the assumption that the
lock guarantees sk_refcnt > 0. That assumption does not hold for
request_sock:
CPU 0 CPU 1
----- -----
tcp_conn_request()
reqsk_queue_hash_req()
inet_ehash_insert(req)
spin_lock(bucket)
__sk_nulls_add_node_rcu(req) // rsk_refcnt == 0
spin_unlock(bucket)
bpf_iter_tcp_established_batch()
spin_lock(bucket)
sock_hold(req) <-- addition on 0
spin_unlock(bucket)
refcount_set(&req->rsk_refcnt, 3) // clobbers saturated value
which surfaces as:
refcount_t: addition on 0; use-after-free.
WARNING: lib/refcount.c:25 at refcount_warn_saturate+0x48/0x90, CPU#1
Call Trace:
bpf_iter_tcp_established_batch+0x14e/0x170
bpf_iter_tcp_batch+0x53/0x200
bpf_iter_tcp_seq_next+0x27/0x70
bpf_seq_read+0x107/0x410
vfs_read+0xb9/0x380
The iterator's stolen reference is lost when the publishing CPU's
refcount_set() overwrites the count, leaving the socket one reference
short. When the last legitimate owner drops its reference the reqsk is
freed while still reachable, leading to use-after-free.
This reproduces in seconds with tcp_syncookies=0, a handful of threads
doing connect()/close() to a local listener while others read an
iter/tcp link in a tight loop.
Use refcount_inc_not_zero() and skip the socket on failure. A skipped
socket is still part of the bucket, so keep counting it in expected.
The reallocations are sized from expected, and a request sock whose
refcount gets published while the lock is held across the last realloc
must already have room.
A skipped socket is counted in expected but never batched, so end_sk
can be short of expected on a batch that is actually complete. Decide
completeness by whether the walk left any socket behind instead. The
WARN after the locked realloc checks the same, replacing an
end_sk == expected check that could not hold on that path since
commit cdec67a489d4 ("bpf: tcp: Make sure iter->batch always
contains a full bucket snapshot").
If every matching socket in a bucket is mid-init (refcount 0), end_sk
stays 0. Advance to the next bucket rather than returning a batch entry
that was never filled this round.
Fixes: 04c7820b776f ("bpf: tcp: Bpf iter batching and lock_sock")
Assisted-by: Claude:unspecified
Signed-off-by: Jose Fernandez (Anthropic) <jose.fernandez@linux.dev>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://lore.kernel.org/bpf/20260730-bpf-iter-tcp-refcnt-v3-1-754b9c8a6717@linux.dev
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_ipv4.c | 43 ++++++++++++++++++++++++-------------------
1 file changed, 24 insertions(+), 19 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 7785c177f2cd3..08154b1f4a8c4 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3199,24 +3199,24 @@ static unsigned int bpf_iter_tcp_established_batch(struct seq_file *seq,
{
struct bpf_tcp_iter_state *iter = seq->private;
struct hlist_nulls_node *node;
- unsigned int expected = 1;
- struct sock *sk;
-
- sock_hold(*start_sk);
- iter->batch[iter->end_sk++].sk = *start_sk;
+ struct sock *sk = *start_sk;
+ unsigned int expected = 0;
- sk = sk_nulls_next(*start_sk);
*start_sk = NULL;
sk_nulls_for_each_from(sk, node) {
- if (seq_sk_match(seq, sk)) {
- if (iter->end_sk < iter->max_sk) {
- sock_hold(sk);
- iter->batch[iter->end_sk++].sk = sk;
- } else if (!*start_sk) {
- /* Remember where we left off. */
- *start_sk = sk;
- }
- expected++;
+ if (!seq_sk_match(seq, sk))
+ continue;
+ expected++;
+ if (iter->end_sk < iter->max_sk) {
+ /* reqsk_queue_hash_req() inserts with sk_refcnt == 0
+ * and refcount_set()s it after the bucket lock drops.
+ */
+ if (unlikely(!refcount_inc_not_zero(&sk->sk_refcnt)))
+ continue;
+ iter->batch[iter->end_sk++].sk = sk;
+ } else if (!*start_sk) {
+ /* Remember where we left off. */
+ *start_sk = sk;
}
}
@@ -3254,12 +3254,13 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
struct sock *sk;
int err;
+again:
sk = bpf_iter_tcp_resume(seq);
if (!sk)
return NULL; /* Done */
expected = bpf_iter_fill_batch(seq, &sk);
- if (likely(iter->end_sk == expected))
+ if (likely(!sk))
goto done;
/* Batch size was too small. */
@@ -3275,7 +3276,7 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
return NULL; /* Done */
expected = bpf_iter_fill_batch(seq, &sk);
- if (likely(iter->end_sk == expected))
+ if (likely(!sk))
goto done;
/* Batch size was still too small. Hold onto the lock while we try
@@ -3288,10 +3289,14 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq)
return ERR_PTR(err);
}
- expected = bpf_iter_fill_batch(seq, &sk);
- WARN_ON_ONCE(iter->end_sk != expected);
+ bpf_iter_fill_batch(seq, &sk);
+ WARN_ON_ONCE(sk);
done:
bpf_iter_tcp_unlock_bucket(seq);
+ if (unlikely(!iter->end_sk)) {
+ ++iter->state.bucket;
+ goto again;
+ }
return iter->batch[0].sk;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 036/181] vhost/vdpa: reject overflowing PA map page counts on 32-bit
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (34 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 035/181] bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 037/181] vdpa/mlx5: Fix buffer length in create_direct_keys() Greg Kroah-Hartman
` (147 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Michael S. Tsirkin, Yousef Alhouseen,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yousef Alhouseen <alhouseenyousef@gmail.com>
[ Upstream commit 0619aaa34c0c2a2dcb07f0e9c8a34e7efb8c4cdf ]
vhost_vdpa_pa_map() adds the IOVA page offset to the user-controlled map
size before computing the number of pages to pin. On 32-bit systems,
where unsigned long is narrower than u64, that addition can overflow and
the code can pin and map fewer pages than the requested IOTLB range.
Reject sizes that overflow the unsigned long page-count calculation.
Fixes: 22af48cf91aa ("vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap()")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yousef Alhouseen <alhouseenyousef@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <CAMuQ4bX-iDvcUOPPY+NLz95tkRJYwWqvzAr=U48uNaub_HZLGw@mail.gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/vhost/vdpa.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 2464c9de67712..a47fdcb61bf36 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -1102,6 +1102,7 @@ static int vhost_vdpa_pa_map(struct vhost_vdpa *v,
unsigned int gup_flags = FOLL_LONGTERM;
unsigned long npages, cur_base, map_pfn, last_pfn = 0;
unsigned long lock_limit, sz2pin, nchunks, i;
+ unsigned long page_offset;
u64 start = iova;
long pinned;
int ret = 0;
@@ -1114,7 +1115,13 @@ static int vhost_vdpa_pa_map(struct vhost_vdpa *v,
if (perm & VHOST_ACCESS_WO)
gup_flags |= FOLL_WRITE;
- npages = PFN_UP(size + (iova & ~PAGE_MASK));
+ page_offset = iova & ~PAGE_MASK;
+ if (size > ULONG_MAX - page_offset) {
+ ret = -EINVAL;
+ goto free;
+ }
+
+ npages = PFN_UP(size + page_offset);
if (!npages) {
ret = -EINVAL;
goto free;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 037/181] vdpa/mlx5: Fix buffer length in create_direct_keys()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (35 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 036/181] vhost/vdpa: reject overflowing PA map page counts on 32-bit Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 038/181] tcp: do not change rcv_ssthresh in tcp_measure_rcv_mss() Greg Kroah-Hartman
` (146 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Christian Borntraeger,
Dragos Tatulea, Michael S. Tsirkin, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Borntraeger <borntraeger@linux.ibm.com>
[ Upstream commit 727e1f569855df83579edbd73dcb4a0723543a12 ]
We have seen in our CI the following KASAN message:
BUG: KASAN: slab-out-of-bounds in cmd_exec+0x550/0xca0 [mlx5_core]
Read of size 272 at addr 0000000176795020 by task qemu-system-s39/82764
[...]
[<000011388ab3a7a0>] cmd_exec+0x550/0xca0 [mlx5_core]
[<000011388ab3b61c>] mlx5_cmd_exec_cb+0x25c/0x4f0 [mlx5_core]
[<000011388b21e82e>] mlx5_vdpa_exec_async_cmds+0x22e/0x5e0 [mlx5_vdpa]
[<000011388b21fd44>] create_direct_keys+0x954/0xef0 [mlx5_vdpa]
[...]
The buggy address is located 4128 bytes inside of
allocated 4384-byte region [0000000176794000, 0000000176795120)
So in essence we read 16 bytes beyond 4384-byte allocation.
create_direct_keys calculates the pointer and length for in and out
buffers.
The size calculation for in includes the entire structure
size (out + in + mtt[]) but the pointer passed to cmd_exec points only
to the 'in' field, skipping the 'out' field.
This causes mlx5_copy_to_msg() to read beyond the allocated buffer
by sizeof(out) bytes when copying command data.
Properly calculate the input size to match the pointer and allocation size.
Fixes: 0071b138d44a ("vdpa/mlx5: Create direct MKEYs in parallel")
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Tested-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260706141537.3510294-1-borntraeger@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/vdpa/mlx5/core/mr.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/vdpa/mlx5/core/mr.c b/drivers/vdpa/mlx5/core/mr.c
index c7a20278bc3ca..27abbe69b55cd 100644
--- a/drivers/vdpa/mlx5/core/mr.c
+++ b/drivers/vdpa/mlx5/core/mr.c
@@ -234,7 +234,8 @@ static int create_direct_keys(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_mr *
cmds[i].out = cmd_mem->out;
cmds[i].outlen = sizeof(cmd_mem->out);
cmds[i].in = cmd_mem->in;
- cmds[i].inlen = struct_size(cmd_mem, mtt, mttcount);
+ cmds[i].inlen = struct_size(cmd_mem, mtt, mttcount) -
+ offsetof(struct mlx5_create_mkey_mem, in);
fill_create_direct_mr(mvdev, dmr, cmd_mem);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 038/181] tcp: do not change rcv_ssthresh in tcp_measure_rcv_mss()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (36 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 037/181] vdpa/mlx5: Fix buffer length in create_direct_keys() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 039/181] xsk: require at least 16 bytes of TX metadata Greg Kroah-Hartman
` (145 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Nathan Gao, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nathan Gao <zcgao@amazon.com>
[ Upstream commit 0e125ecfe20c077625cf0be8d750d5c3abc0dce9 ]
Commit f5da7c45188e ("tcp: adjust rcvq_space after updating scaling
ratio") replaced the direct window_clamp update in tcp_measure_rcv_mss()
with a call to tcp_set_window_clamp(), a helper that implements the
TCP_WINDOW_CLAMP setsockopt. As a side effect, the helper also shrinks
rcv_ssthresh via __tcp_adjust_rcv_ssthresh().
As a result, each scaling_ratio decrease detected by
tcp_measure_rcv_mss() also cuts rcv_ssthresh. Elsewhere in TCP,
rcv_ssthresh is usually cut under memory pressure and grows via
tcp_grow_window().
Flows whose segment sizes vary keep scaling_ratio oscillating, which
leads to an unstable rcv_ssthresh: a dip of rcv_ssthresh only recovers
via tcp_grow_window(), keeping the advertised window at a relatively
low level even after the ratio itself has recovered, and can even stall
the sender.
Observed on a customer's proxy gateway after upgrading from kernel 6.1
to 6.12: in the worst case, rcv_ssthresh was cut in half by a
scaling_ratio dip. P99 latency jumped from <10ms on 6.1 to ~100ms on
6.12, and almost returned to the 6.1 level with this patch applied.
Restore the plain WRITE_ONCE() update of window_clamp, as introduced
in commit a2cbb1603943 ("tcp: Update window clamping condition"), and
keep the rcvq_space.space adjustment. Now rcv_ssthresh is decoupled from
scaling_ratio changes in tcp_measure_rcv_mss().
Fixes: f5da7c45188e ("tcp: adjust rcvq_space after updating scaling ratio")
Signed-off-by: Nathan Gao <zcgao@amazon.com>
Link: https://patch.msgid.link/20260725030806.28135-1-zcgao@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/tcp_input.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e57917aefd508..2fb68455679a8 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -247,7 +247,7 @@ static void tcp_measure_rcv_mss(struct sock *sk, const struct sk_buff *skb)
struct tcp_sock *tp = tcp_sk(sk);
val = tcp_win_from_space(sk, sk->sk_rcvbuf);
- tcp_set_window_clamp(sk, val);
+ WRITE_ONCE(tp->window_clamp, val);
if (tp->window_clamp < tp->rcvq_space.space)
tp->rcvq_space.space = tp->window_clamp;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 039/181] xsk: require at least 16 bytes of TX metadata
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (37 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 038/181] tcp: do not change rcv_ssthresh in tcp_measure_rcv_mss() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 040/181] udp: fix potential use-after-free in tunnel segmentation Greg Kroah-Hartman
` (144 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, AutonomousCodeSecurity,
Cen Zhang (Microsoft), Stanislav Fomichev, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Stanislav Fomichev <sdf.kernel@gmail.com>
[ Upstream commit 1bb30b181d9f0484e141f8411e15ed906d5c6780 ]
AF_XDP accepts a TX metadata length as small as eight bytes, but every
supported request needs the flags plus at least one eight-byte request
field. Such short metadata also lets the kernel read beyond the registered
area.
Require 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve
compatibility with applications that do not use launch-time metadata.
Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
Reported-by: AutonomousCodeSecurity@microsoft.com
Reported-by: Cen Zhang (Microsoft) <blbllhy@gmail.com>
Link: https://lore.kernel.org/netdev/20260720155210.34229-1-blbllhy@gmail.com/
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260727161959.885642-2-sdf@fomichev.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/xdp/xdp_umem.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 9ec7bd948acc7..81ffda5501078 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -209,6 +209,8 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
if (mr->flags & XDP_UMEM_TX_METADATA_LEN) {
if (mr->tx_metadata_len >= 256 || mr->tx_metadata_len % 8)
return -EINVAL;
+ if (mr->tx_metadata_len < 16)
+ return -EINVAL;
umem->tx_metadata_len = mr->tx_metadata_len;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 040/181] udp: fix potential use-after-free in tunnel segmentation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (38 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 039/181] xsk: require at least 16 bytes of TX metadata Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 041/181] net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter Greg Kroah-Hartman
` (143 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Xuanqiang Luo, Antoine Tenart,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
[ Upstream commit d0f86fb36eb260abd10007b62c9dcc1028e03e61 ]
__skb_udp_tunnel_segment() gets the UDP header before ensuring the
tunnel header is in the skb head. If the pull reallocates skb->head,
the saved UDP header pointer is no longer valid.
Get the UDP header after the pull to avoid a potential use-after-free.
Fixes: dbef491ebe7f ("udp: Use uh->len instead of skb->len to compute checksum in segmentation")
Signed-off-by: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Link: https://patch.msgid.link/20260730093554.68127-1-xuanqiang.luo@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/udp_offload.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index 99688014901ed..04246d1f8b3e7 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -22,17 +22,19 @@ static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb,
int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb);
bool remcsum, need_csum, offload_csum, gso_partial;
struct sk_buff *segs = ERR_PTR(-EINVAL);
- struct udphdr *uh = udp_hdr(skb);
u16 mac_offset = skb->mac_header;
__be16 protocol = skb->protocol;
u16 mac_len = skb->mac_len;
int udp_offset, outer_hlen;
+ struct udphdr *uh;
__wsum partial;
bool need_ipsec;
if (unlikely(!pskb_may_pull(skb, tnl_hlen)))
goto out;
+ uh = udp_hdr(skb);
+
/* Adjust partial header checksum to negate old length.
* We cannot rely on the value contained in uh->len as it is
* possible that the actual value exceeds the boundaries of the
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 041/181] net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (39 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 040/181] udp: fix potential use-after-free in tunnel segmentation Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 042/181] net/openvswitch: check Ethernet header length in key_extract() Greg Kroah-Hartman
` (142 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Zhiling Zou, Ren Wei,
Toke Høiland-Jørgensen, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Toke Høiland-Jørgensen <toke@toke.dk>
[ Upstream commit 2a33516f9ef59ad11844d4fc152f889449b5daf3 ]
The sch_cake ACK filter parses packets to find the TCP header and filter
duplicated ACKs if the flow is backlogged. The parsing code contains a
WARN_ON(1) which can be triggered by a malformed IP header in certain
cases. Depending on the system configuration, this leads either to
either spamming dmesg with warnings, or a panic if panic_on_warn is set.
The code already correctly skips the offending packet in the branch that
triggers the warning, so the WARN_ON itself doesn't really serve any
purpose. So just drop it altogether to avoid the inconvenient side
effects.
Fixes: 8b7138814f29 ("sch_cake: Add optional ACK filter")
Reported-by: Zhiling Zou <zhilinz@nebusec.ai>
Reported-by: Ren Wei <enjou1224z@gmail.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20260729191417.45665-1-toke@toke.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/sched/sch_cake.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
index 2f33739036bb1..43908ec231696 100644
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -1265,7 +1265,6 @@ static struct sk_buff *cake_ack_filter(struct cake_sched_data *q,
seglen = ntohs(ipv6h_check->payload_len);
} else {
- WARN_ON(1); /* shouldn't happen */
continue;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 042/181] net/openvswitch: check Ethernet header length in key_extract()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (40 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 041/181] net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 043/181] net/sched: cls_api: Always acquire rtnl_lock when destroying locked classifiers Greg Kroah-Hartman
` (141 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, AutonomousCodeSecurity,
Eelco Chaudron, Cen Zhang (Microsoft), Ilya Maximets, Paolo Abeni,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cen Zhang (Microsoft) <blbllhy@gmail.com>
[ Upstream commit cf6f8b29befb92173659bcef6a441d274947bfae ]
When a packet arrives on an ARPHRD_NONE device (e.g. TUN),
ovs_flow_key_extract() trusts the user-provided skb->protocol field: if
it is ETH_P_TEB, the packet is classified as MAC_PROTO_ETHERNET and
key_extract() is called without ensuring the skb has ETH_HLEN (14) bytes
of linear data. key_extract() unconditionally pulls 2 * ETH_ALEN bytes
for MAC addresses and parse_ethertype() pulls 2 more, either of which
triggers a kernel BUG in __skb_pull() when the linear area is too small.
kernel BUG at include/linux/skbuff.h:2848!
RIP: 0010:key_extract+0xa7e/0xd90 net/openvswitch/flow.c:933
ovs_flow_key_extract+0x419/0xa70
ovs_vport_receive+0x222/0x390
netdev_frame_hook+0x3e0/0x630
tun_get_user+0x2d0c/0x38e0
Fixed by calling check_header() in key_extract() before accessing the
Ethernet header.
Fixes: 217ac77a3c25 ("openvswitch: allow L3 netdev ports")
Reported-by: AutonomousCodeSecurity@microsoft.com
Reviewed-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Cen Zhang (Microsoft) <blbllhy@gmail.com>
Reviewed-by: Ilya Maximets <i.maximets@ovn.org>
Link: https://patch.msgid.link/20260730222006.118652-1-blbllhy@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/openvswitch/flow.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index b80bd3a907739..52e261ce91e8e 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -893,8 +893,6 @@ static int key_extract_l3l4(struct sk_buff *skb, struct sw_flow_key *key)
* Ethernet header
* @key: output flow key
*
- * The caller must ensure that skb->len >= ETH_HLEN.
- *
* Initializes @skb header fields as follows:
*
* - skb->mac_header: the L2 header.
@@ -914,8 +912,6 @@ static int key_extract_l3l4(struct sk_buff *skb, struct sw_flow_key *key)
*/
static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
{
- struct ethhdr *eth;
-
/* Flags are always used as part of stats */
key->tp.flags = 0;
@@ -930,6 +926,13 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
skb_reset_network_header(skb);
key->eth.type = skb->protocol;
} else {
+ struct ethhdr *eth;
+ int err;
+
+ err = check_header(skb, ETH_HLEN);
+ if (unlikely(err))
+ return err;
+
eth = eth_hdr(skb);
ether_addr_copy(key->eth.src, eth->h_source);
ether_addr_copy(key->eth.dst, eth->h_dest);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 043/181] net/sched: cls_api: Always acquire rtnl_lock when destroying locked classifiers
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (41 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 042/181] net/openvswitch: check Ethernet header length in key_extract() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 044/181] hwmon: (nzxt-smart2) Check return value of init_device() in probe Greg Kroah-Hartman
` (140 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Feng Xue, Victor Nogueira,
Jamal Hadi Salim, Paolo Abeni, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jamal Hadi Salim <jhs@mojatatu.com>
[ Upstream commit a347304b2ca1a5377d5bd2d8a72e4b4f12afe648 ]
Another challenge with unlocked filters.
There is a short window in tc_new_tfilter where a tcf_proto can be found
and briefly referenced by a totally unrelated, unlocked classifier's request
and cause a race.
Feng created a poc which created this race with two threads, one creating a
u32 filter and other a flower filter in the same chain/prio:
1. Both threads enter tc_new_tfilter, both find the chain empty, both
drop filter_chain_lock
2. u32 finishes tcf_proto_create("u32") first, calls
tcf_chain_tp_insert_unique() -> inserts u32_tp into the chain
3. flower finishes tcf_proto_create("flower") later, calls
tcf_chain_tp_insert_unique() -> tcf_chain_tp_find() now sees u32_tp
already there, takes a reference on it, destroys flower's own tp_new
and returns u32_tp to the caller.
Flower then hits the kind mismatch check (because it requested for kind
"flower" but tp->ops->kind is "u32") and goes through the errout path
which calls tcf_proto_put() on u32_tp. If the u32 thread has already
gone through its own errout (its change() call failed on the PoC's empty
options) and dropped its create and insert refs, flower's put is the
last one and drops u32_tp's refcnt to zero.
At this point tp->ops->destroy() runs in a context that never took
rtnl_lock. When that happens, it might cause a UAF like the following
(illustrated by the PoC):
[ +0.000710] BUG: KASAN: slab-use-after-free in u32_init (net/sched/cls_u32.c:393)
[ +0.000281] Read of size 8 at addr ffff888120022f00 by task poc_feng_xue/524
Call Trace:
u32_init (net/sched/cls_u32.c:393)
tc_new_tfilter (net/sched/cls_api.c:2378)
Allocated by task 526:
u32_init (net/sched/cls_u32.c:378)
tc_new_tfilter (net/sched/cls_api.c:2378)
Freed by task 522:
kfree
u32_destroy (net/sched/cls_u32.c:662)
tcf_proto_destroy (net/sched/cls_api.c:446)
tcf_proto_put (net/sched/cls_api.c:459)
tc_new_tfilter (net/sched/cls_api.c:2459)
Fix this by having tcf_proto_destroy() take rtnl_lock around
tp->ops->destroy() for locked classifiers whenever rtnl is not held.
To explain why I used a temp variable "not_lockless" I'd like to point to a
semi-related note on rtnl_held vs TCF_PROTO_OPS_DOIT_UNLOCKED (adding here
for future cleanup if deemed necessary):
The rtnl_held parameter and the TCF_PROTO_OPS_DOIT_UNLOCKED flag are
redundant sources of truth for whether rtnl_lock is held. Among the nine
classifier destroy(..rtnl_held..) callbacks, only flower consults the
rtnl_held parameter which it propagates to tc_setup_cb_destroy()
and tc_setup_cb_call(). The other eight (u32, flow, bpf, cgroup, route, basic,
fw, mall) ignore it entirely;-> those that call tc_setup_cb_destroy()
(u32, bpf, mall) hardcode true always instead of forwarding the parameter.
A future cleanup should remove the rtnl_held parameter from the destroy callback
signature entirely and have callers rely solely on their knowledge whether
they are running in an unlocked context.
Fixes: 12db03b65c2b ("net: sched: extend proto ops to support unlocked classifiers")
Reported-by: Feng Xue <feng.xue@outlook.com>
Tested-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20260801125632.360365-1-jhs@mojatatu.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/sched/cls_api.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index c5aeff709ca66..51a09d5553102 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -443,7 +443,22 @@ static void tcf_chain_put(struct tcf_chain *chain);
static void tcf_proto_destroy(struct tcf_proto *tp, bool rtnl_held,
bool sig_destroy, struct netlink_ext_ack *extack)
{
- tp->ops->destroy(tp, rtnl_held, extack);
+ /* A locked classifier's destroy callback (e.g. u32_destroy) uses
+ * rtnl_dereference() and mutates shared structures (e.g. the
+ * tc_u_common hash list) that are only safe under rtnl_lock. When an
+ * unlocked classifier's request (e.g. flower on ingress) loses the
+ * tcf_chain_tp_insert_unique() race and ends up dropping the last
+ * reference on a locked classifier's proto, destroy() would run
+ * without rtnl held. Take it here in that case.
+ */
+ bool not_lockless = !rtnl_held &&
+ !(tp->ops->flags & TCF_PROTO_OPS_DOIT_UNLOCKED);
+
+ if (not_lockless)
+ rtnl_lock();
+ tp->ops->destroy(tp, rtnl_held || not_lockless, extack);
+ if (not_lockless)
+ rtnl_unlock();
tcf_proto_count_usesw(tp, false);
if (sig_destroy)
tcf_proto_signal_destroyed(tp->chain, tp);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 044/181] hwmon: (nzxt-smart2) Check return value of init_device() in probe
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (42 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 043/181] net/sched: cls_api: Always acquire rtnl_lock when destroying locked classifiers Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 045/181] hwmon: (pmbus/lm25066) Fix PMBus coefficient calculations Greg Kroah-Hartman
` (139 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Qingshuang Fu, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qingshuang Fu <fuqingshuang@kylinos.cn>
[ Upstream commit d533882ce1060866a590257f2c77ee23eabef5b8 ]
The init_device() call in nzxt_smart2_hid_probe() can fail because it
sends HID output reports to the hardware to detect fans and set the
update interval. If the hardware is not responding or the HID reports
fail, init_device() returns a negative error code.
However, the return value was ignored, causing the probe to continue
and register an hwmon device even though the device was never properly
initialized. This leads to an inconsistent state where the driver
reports stale data or blocks on wait queues that will never be woken.
The same function's return value is already checked in the
reset_resume() handler, confirming the author's intent that errors
should be propagated.
Note that this fix was not possible before commit 59d104b54b0b
("hwmon: (nzxt-smart2) Stop device IO before calling hid_hw_stop")
because the out_hw_close error path was missing hid_device_io_stop(),
which would have opened a use-after-free risk window.
Fixes: 53e68c20aeb1 ("hwmon: add driver for NZXT RGB&Fan Controller/Smart Device v2.")
Signed-off-by: Qingshuang Fu <fuqingshuang@kylinos.cn>
Link: https://lore.kernel.org/r/20260804074842.505923-1-fffsqian@163.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/nzxt-smart2.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/nzxt-smart2.c b/drivers/hwmon/nzxt-smart2.c
index 66c5886f411a6..8ff3ebc1bb4c1 100644
--- a/drivers/hwmon/nzxt-smart2.c
+++ b/drivers/hwmon/nzxt-smart2.c
@@ -760,7 +760,11 @@ static int nzxt_smart2_hid_probe(struct hid_device *hdev,
hid_device_io_start(hdev);
- init_device(drvdata, UPDATE_INTERVAL_DEFAULT_MS);
+ ret = init_device(drvdata, UPDATE_INTERVAL_DEFAULT_MS);
+ if (ret) {
+ dev_err(&hdev->dev, "init_device failed: %d\n", ret);
+ goto out_hw_close;
+ }
drvdata->hwmon =
hwmon_device_register_with_info(&hdev->dev, "nzxtsmart2", drvdata,
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 045/181] hwmon: (pmbus/lm25066) Fix PMBus coefficient calculations
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (43 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 044/181] hwmon: (nzxt-smart2) Check return value of init_device() in probe Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 046/181] selftests/ftrace: refactor eprobes test to fix argument checks Greg Kroah-Hartman
` (138 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Sashiko, Guenter Roeck, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@roeck-us.net>
[ Upstream commit 0dabe8a56f772f0ece46d2597799f412c277d874 ]
In lm25066_probe(), the PMBus coefficients for current and power are
scaled based on the shunt resistor value. The calculation evaluates the
multiplication using 32-bit arithmetic because info->m is an int and
shunt is a u32:
static int lm25066_probe(struct i2c_client *client) {
...
info->m[PSC_CURRENT_IN] = info->m[PSC_CURRENT_IN] * shunt / 1000;
info->m[PSC_POWER] = info->m[PSC_POWER] * shunt / 1000;
...
}
For large coefficients like 26882 (LM25056) or 15076 (LM5066i), a device
tree shunt-resistor-micro-ohms value exceeding approximately 159,000
(159 mOhm, which is physically valid for low-current applications) causes
the intermediate product to exceed UINT_MAX (4,294,967,295). This results
in a silent wraparound before the division by 1000.
Furthermore, if the wrapped value has the most significant bit set,
converting it back to the signed int info->m results in negative
coefficients. This logic error leads to drastically corrupted current and
power readings, which can cause erratic thermal or power management
behavior in the system.
Fix the problem by using 64-bit operations for the multiply/divide
operations. This can still overflow, but only for unreasonably large
shunt resistor values.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: 94ee5fcc240fe ("hwmon: (pmbus/lm25066) Support configurable sense resistor values")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/pmbus/lm25066.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
index c36c124d1a2d8..f0bf3b1533313 100644
--- a/drivers/hwmon/pmbus/lm25066.c
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/log2.h>
+#include <linux/math.h>
#include <linux/of.h>
#include "pmbus.h"
@@ -540,8 +541,8 @@ static int lm25066_probe(struct i2c_client *client)
if (of_property_read_u32(client->dev.of_node, "shunt-resistor-micro-ohms", &shunt))
shunt = 1000;
- info->m[PSC_CURRENT_IN] = info->m[PSC_CURRENT_IN] * shunt / 1000;
- info->m[PSC_POWER] = info->m[PSC_POWER] * shunt / 1000;
+ info->m[PSC_CURRENT_IN] = DIV_ROUND_CLOSEST_ULL((u64)info->m[PSC_CURRENT_IN] * shunt, 1000);
+ info->m[PSC_POWER] = DIV_ROUND_CLOSEST_ULL((u64)info->m[PSC_POWER] * shunt, 1000);
#if IS_ENABLED(CONFIG_SENSORS_LM25066_REGULATOR)
/* LM25056 doesn't support OPERATION */
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 046/181] selftests/ftrace: refactor eprobes test to fix argument checks
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (44 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 045/181] hwmon: (pmbus/lm25066) Fix PMBus coefficient calculations Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 047/181] bnxt_en: Move RSS table fill outside __bnxt_hwrm_vnic_set_rss() Greg Kroah-Hartman
` (137 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, kernel test robot, Martin Kaiser,
Masami Hiramatsu (Google), Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Martin Kaiser <martin@kaiser.cx>
[ Upstream commit 6e3abef2a27e7402a94111c9eff85d887e64a309 ]
The add/remove eprobe test installs an eprobe for the openat syscall and
runs ls. It checks the filenames that were opened by ls against a
whitelist and a blacklist.
Commit 206b25c09080 ("tracing: eprobe: read the complete FILTER_PTR_STRING
pointer") fixed access to some string fields in eprobes. This triggers
test failures as the blacklist does not allow relative paths for the
openat parameters.
What makes this test unstable is the fact that the openat calls vary a
lot between different systems.
Refactor the test to make it more robust. "cd <directory>" will issue a
chdir syscall with the target directory as parameter. Set an eprobe on
the sys_enter_chdir event and filter for the exact directory name. Allow
(fault) as fallback.
Link: https://lore.kernel.org/all/20260804194705.760893-1-martin@kaiser.cx/
Fixes: 206b25c09080 ("tracing: eprobe: read the complete FILTER_PTR_STRING pointer")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202607151010.b68428e1-lkp@intel.com
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../ftrace/test.d/dynevent/add_remove_eprobe.tc | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
index c300eb0202620..e2322693d0c32 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
@@ -1,16 +1,16 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Generic dynamic event - add/remove eprobe events
-# requires: dynamic_events events/syscalls/sys_enter_openat "<attached-group>.<attached-event> [<args>]":README
+# requires: dynamic_events events/syscalls/sys_enter_chdir "<attached-group>.<attached-event> [<args>]":README
echo 0 > events/enable
clear_dynamic_events
SYSTEM="syscalls"
-EVENT="sys_enter_openat"
+EVENT="sys_enter_chdir"
FIELD="filename"
-EPROBE="eprobe_open"
+EPROBE="eprobe_chdir"
OPTIONS="file=+0(\$filename):ustring"
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
@@ -18,20 +18,14 @@ grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE
echo 1 > events/eprobes/$EPROBE/enable
-ls
+cd /sys/kernel/tracing
echo 0 > events/eprobes/$EPROBE/enable
-content=`grep '^ *ls-' trace | grep 'file='`
-nocontent=`grep '^ *ls-' trace | grep 'file=' | grep -v -e '"/' -e '"."' -e '(fault)' ` || true
-
+content=`grep -e 'file="/sys/kernel/tracing"\|(fault)' trace`
if [ -z "$content" ]; then
exit_fail
fi
-if [ ! -z "$nocontent" ]; then
- exit_fail
-fi
-
echo "-:$EPROBE" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 047/181] bnxt_en: Move RSS table fill outside __bnxt_hwrm_vnic_set_rss()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (45 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 046/181] selftests/ftrace: refactor eprobes test to fix argument checks Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 048/181] bnxt_en: Determine and store default RX ring in vnic structure Greg Kroah-Hartman
` (136 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kalesh AP, Pavan Chebbi, Shravya KN,
Michael Chan, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shravya KN <shravya.k-n@broadcom.com>
[ Upstream commit 1d0fc6c7ea49994b8ff50d02979d1e4207ec6c4f ]
This is a refactor patch with no change in behavior. The caller
will now fill the RSS table before calling __bnxt_hwrm_vnic_set_rss().
In the next patch, we'll add code to determine the default ring for
the VNIC when we fill the RSS table.
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Shravya KN <shravya.k-n@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20260731190937.807270-2-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 0b137529a899 ("bnxt_en: Refresh VNIC default ring on queue restart if needed")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 4970e20b2cb1b..ce7de01000160 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6367,6 +6367,9 @@ static void bnxt_fill_hw_rss_tbl(struct bnxt *bp, struct bnxt_vnic_info *vnic)
bool no_rss = !(vnic->flags & BNXT_VNIC_RSS_FLAG);
u16 i, j;
+ if (!vnic->rss_table)
+ return;
+
/* Fill the RSS indirection table with ring group ids */
for (i = 0, j = 0; i < HW_HASH_INDEX_SIZE; i++) {
if (!no_rss)
@@ -6406,13 +6409,8 @@ static void
__bnxt_hwrm_vnic_set_rss(struct bnxt *bp, struct hwrm_vnic_rss_cfg_input *req,
struct bnxt_vnic_info *vnic)
{
- if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS) {
- bnxt_fill_hw_rss_tbl_p5(bp, vnic);
- if (bp->flags & BNXT_FLAG_CHIP_P7)
- req->flags |= VNIC_RSS_CFG_REQ_FLAGS_IPSEC_HASH_TYPE_CFG_SUPPORT;
- } else {
- bnxt_fill_hw_rss_tbl(bp, vnic);
- }
+ if (bp->flags & BNXT_FLAG_CHIP_P7)
+ req->flags |= VNIC_RSS_CFG_REQ_FLAGS_IPSEC_HASH_TYPE_CFG_SUPPORT;
if (bp->rss_hash_delta) {
req->hash_type = cpu_to_le32(bp->rss_hash_delta);
@@ -6464,6 +6462,7 @@ static int bnxt_hwrm_vnic_set_rss_p5(struct bnxt *bp,
if (!set_rss)
return hwrm_req_send(bp, req);
+ bnxt_fill_hw_rss_tbl_p5(bp, vnic);
__bnxt_hwrm_vnic_set_rss(bp, req, vnic);
ring_tbl_map = vnic->rss_table_dma_addr;
nr_ctxs = bnxt_get_nr_rss_ctxs(bp, bp->rx_nr_rings);
@@ -10299,6 +10298,7 @@ static int __bnxt_setup_vnic(struct bnxt *bp, struct bnxt_vnic_info *vnic)
}
skip_rss_ctx:
+ bnxt_fill_hw_rss_tbl(bp, vnic);
/* configure default vnic, ring grp */
rc = bnxt_hwrm_vnic_cfg(bp, vnic);
if (rc) {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 048/181] bnxt_en: Determine and store default RX ring in vnic structure
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (46 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 047/181] bnxt_en: Move RSS table fill outside __bnxt_hwrm_vnic_set_rss() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 049/181] bnxt_en: Refresh VNIC default ring on queue restart if needed Greg Kroah-Hartman
` (135 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kalesh AP, Pavan Chebbi, Shravya KN,
Michael Chan, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shravya KN <shravya.k-n@broadcom.com>
[ Upstream commit 53f01cd594e223aabb538d5288e60111523c96f2 ]
Each VNIC has a default RX ring. The purpose of the default RX ring
is to provide a destination for any packets that cannot be parsed by
the RSS logic. Up until now, the default RX ring is always Ring 0.
We neglected to take care of this default RX ring when adding the
queue restart feature. If ring 0 (default ring) is re-started, it
may now have a new FW ring ID after freeing the old one and
allocating a new one. The VNIC now may have a stale default ring
and it may generate an internal exception. This exception may
appear in dmesg:
FW reported unknown error type 10
The best way to resolve this issue is to use a more appropriate
ring for the default ring instead of always ring 0. Ring 0 may not
even be in the RSS table, especially on a new RSS context.
This patch adds the logic to determine and store the proper default
RX ring for a VNIC. For an RSS VNIC, the default ring is the lowest
ring number in the RSS table. The next patch will add proper logic
to update the VNIC if the default ring changes after queue restart.
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Shravya KN <shravya.k-n@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20260731190937.807270-3-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 0b137529a899 ("bnxt_en: Refresh VNIC default ring on queue restart if needed")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 33 +++++++++++++++--------
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 +
2 files changed, 23 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index ce7de01000160..31971a45ac3d4 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6365,25 +6365,36 @@ int bnxt_get_nr_rss_ctxs(struct bnxt *bp, int rx_rings)
static void bnxt_fill_hw_rss_tbl(struct bnxt *bp, struct bnxt_vnic_info *vnic)
{
bool no_rss = !(vnic->flags & BNXT_VNIC_RSS_FLAG);
- u16 i, j;
+ u16 i, j, min_j = bp->rx_nr_rings - 1;
if (!vnic->rss_table)
- return;
+ goto skip_rss_tbl;
/* Fill the RSS indirection table with ring group ids */
for (i = 0, j = 0; i < HW_HASH_INDEX_SIZE; i++) {
if (!no_rss)
j = bp->rss_indir_tbl[i];
+ min_j = min(j, min_j);
vnic->rss_table[i] = cpu_to_le16(vnic->fw_grp_ids[j]);
}
+
+skip_rss_tbl:
+ if (vnic->rss_table && !no_rss)
+ vnic->default_rx_ring = min_j;
+ else if (vnic->flags & BNXT_VNIC_RFS_FLAG)
+ vnic->default_rx_ring = vnic->vnic_id - 1;
+ else if ((vnic->vnic_id == 1) && BNXT_CHIP_TYPE_NITRO_A0(bp))
+ vnic->default_rx_ring = bp->rx_nr_rings - 1;
+ else
+ vnic->default_rx_ring = 0;
}
static void bnxt_fill_hw_rss_tbl_p5(struct bnxt *bp,
struct bnxt_vnic_info *vnic)
{
+ u16 tbl_size, i, min_j = bp->rx_nr_rings - 1;
__le16 *ring_tbl = vnic->rss_table;
struct bnxt_rx_ring_info *rxr;
- u16 tbl_size, i;
tbl_size = bnxt_get_rxfh_indir_size(bp->dev);
@@ -6396,6 +6407,7 @@ static void bnxt_fill_hw_rss_tbl_p5(struct bnxt *bp,
j = ethtool_rxfh_context_indir(vnic->rss_ctx)[i];
else
j = bp->rss_indir_tbl[i];
+ min_j = min(j, min_j);
rxr = &bp->rx_ring[j];
ring_id = rxr->rx_ring_struct.fw_ring_id;
@@ -6403,6 +6415,7 @@ static void bnxt_fill_hw_rss_tbl_p5(struct bnxt *bp,
ring_id = bnxt_cp_ring_for_rx(bp, rxr);
*ring_tbl++ = cpu_to_le16(ring_id);
}
+ vnic->default_rx_ring = min_j;
}
static void
@@ -6600,8 +6613,9 @@ int bnxt_hwrm_vnic_cfg(struct bnxt *bp, struct bnxt_vnic_info *vnic)
return rc;
if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS) {
- struct bnxt_rx_ring_info *rxr = &bp->rx_ring[0];
+ struct bnxt_rx_ring_info *rxr;
+ rxr = &bp->rx_ring[vnic->default_rx_ring];
req->default_rx_ring_id =
cpu_to_le16(rxr->rx_ring_struct.fw_ring_id);
req->default_cmpl_ring_id =
@@ -6634,13 +6648,7 @@ int bnxt_hwrm_vnic_cfg(struct bnxt *bp, struct bnxt_vnic_info *vnic)
req->cos_rule = cpu_to_le16(0xffff);
}
- if (vnic->flags & BNXT_VNIC_RSS_FLAG)
- ring = 0;
- else if (vnic->flags & BNXT_VNIC_RFS_FLAG)
- ring = vnic->vnic_id - 1;
- else if ((vnic->vnic_id == 1) && BNXT_CHIP_TYPE_NITRO_A0(bp))
- ring = bp->rx_nr_rings - 1;
-
+ ring = vnic->default_rx_ring;
grp_idx = bp->rx_ring[ring].bnapi->index;
req->dflt_ring_grp = cpu_to_le16(bp->grp_info[grp_idx].fw_grp_id);
req->lb_rule = cpu_to_le16(0xffff);
@@ -10604,6 +10612,9 @@ static int bnxt_setup_nitroa0_vnic(struct bnxt *bp)
return rc;
}
+ /* Setup the proper default RX ring */
+ bnxt_fill_hw_rss_tbl(bp, vnic);
+
rc = bnxt_hwrm_vnic_cfg(bp, vnic);
if (rc) {
netdev_err(bp->dev, "Cannot allocate special vnic for NS2 A0: %x\n",
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 37fb74f18eeec..f50fe72f83ac6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1300,6 +1300,7 @@ struct bnxt_vnic_info {
#define BNXT_VNIC_RSSCTX_FLAG 0x40
struct ethtool_rxfh_context *rss_ctx;
u32 vnic_id;
+ u16 default_rx_ring;
};
struct bnxt_rss_ctx {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 049/181] bnxt_en: Refresh VNIC default ring on queue restart if needed
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (47 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 048/181] bnxt_en: Determine and store default RX ring in vnic structure Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 050/181] bnxt_en: Fix PTP PPS setting bug Greg Kroah-Hartman
` (134 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kalesh AP, Pavan Chebbi, Shravya KN,
Michael Chan, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shravya KN <shravya.k-n@broadcom.com>
[ Upstream commit 0b137529a8997caf67190ca1d71ba8bbdb44fbfb ]
When a queue is restarted, refresh VNIC_CFG for all VNICs whose
default RX ring is the restarted ring. This will eliminate this
possible FW warning caused by a stale default ring in the VNIC:
FW reported unknown error type 10
Fixes: 5ac066b7b062 ("bnxt_en: Fix queue start to update vnic RSS table")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Shravya KN <shravya.k-n@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20260731190937.807270-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 31971a45ac3d4..2356b7ba7fcfb 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -10531,6 +10531,11 @@ static int bnxt_set_vnic_mru_p5(struct bnxt *bp, struct bnxt_vnic_info *vnic,
vnic->vnic_id, rc);
return rc;
}
+ if (rxr_id == vnic->default_rx_ring) {
+ rc = bnxt_hwrm_vnic_cfg(bp, vnic);
+ if (rc)
+ return rc;
+ }
}
vnic->mru = mru;
bnxt_hwrm_vnic_update(bp, vnic,
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 050/181] bnxt_en: Fix PTP PPS setting bug
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (48 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 049/181] bnxt_en: Refresh VNIC default ring on queue restart if needed Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 051/181] sctp: fix addip_serial increment on ASCONF_ACK allocation failure Greg Kroah-Hartman
` (133 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Pavan Chebbi, Keegan Freyhof,
Michael Chan, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Keegan Freyhof <keegan.freyhof@broadcom.com>
[ Upstream commit 80eaf88efec33ac77ed7726d066c4f2f932cc329 ]
The existing driver logic is always turning on PTP_CLK_REQ_PPS
regardless of the "on" parameter passed to bnxt_ptp_enable().
During shutdown, PTP_CLK_REQ_PPS may be turned off and this
bug will do the opposite and may trigger a PCIe PTM request TLP.
On some systems this can trigger a PCIe AER.
Fix it by properly configuring PTP_CLK_REQ_PPS based on the "on"
parameter.
Fixes: 9e518f25802c ("bnxt_en: 1PPS functions to configure TSIO pins")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Keegan Freyhof <keegan.freyhof@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20260731190937.807270-6-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 6dfa0ab74c332..02276b9ac5c62 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -494,12 +494,15 @@ static int bnxt_ptp_enable(struct ptp_clock_info *ptp_info,
return rc;
case PTP_CLK_REQ_PPS:
/* Configure PHC PPS IN */
- rc = bnxt_ptp_cfg_pin(bp, 0, BNXT_PPS_PIN_PPS_IN);
+ pin_id = 0;
+ if (!on)
+ break;
+ rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_IN);
if (rc)
return rc;
rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_INTERNAL);
if (!rc)
- ptp->pps_info.pins[0].event = BNXT_PPS_EVENT_INTERNAL;
+ ptp->pps_info.pins[pin_id].event = BNXT_PPS_EVENT_INTERNAL;
return rc;
default:
netdev_err(ptp->bp->dev, "Unrecognized PIN function\n");
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 051/181] sctp: fix addip_serial increment on ASCONF_ACK allocation failure
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (49 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 050/181] bnxt_en: Fix PTP PPS setting bug Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 052/181] tcp: fix TFO max_qlen accounting across reuseport migration Greg Kroah-Hartman
` (132 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Qing Luo, Xin Long, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qing Luo <luoqing@kylinos.cn>
[ Upstream commit aa2e13ae8d3cbe2c15ef4f7e971b2de0832794aa ]
In sctp_process_asconf(), when sctp_make_asconf_ack() fails to allocate
the ASCONF_ACK chunk due to memory pressure, the code jumps to the
done label where asoc->peer.addip_serial is unconditionally incremented.
This leaves the peer's ASCONF (serial N) unacknowledged while the local
endpoint now expects serial N+1. When the peer retransmits serial N, it
falls into the serial < addip_serial + 1 branch ,
which attempts to look up a cached ACK for serial N. No cached ACK
exists since the allocation failed, so the retransmission is silently
discarded. The peer eventually times out and ABORTs the association.
Move the addip_serial increment inside the if (asconf_ack) block so that
the serial number is only advanced when the ASCONF_ACK is successfully
created and cached. This way, on allocation failure, the serial number
is unchanged and the peer's retransmitted ASCONF will be correctly
re-processed.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Qing Luo <luoqing@kylinos.cn>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20260804025514.241767-1-l1138897701@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/sctp/sm_make_chunk.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 27a7739a7d424..b6eb79ef6a55d 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -3354,12 +3354,11 @@ struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
goto done;
}
done:
- asoc->peer.addip_serial++;
-
/* If we are sending a new ASCONF_ACK hold a reference to it in assoc
* after freeing the reference to old asconf ack if any.
*/
if (asconf_ack) {
+ asoc->peer.addip_serial++;
sctp_chunk_hold(asconf_ack);
list_add_tail(&asconf_ack->transmitted_list,
&asoc->asconf_ack_list);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 052/181] tcp: fix TFO max_qlen accounting across reuseport migration
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (50 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 051/181] sctp: fix addip_serial increment on ASCONF_ACK allocation failure Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 053/181] net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length Greg Kroah-Hartman
` (131 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jiayuan Chen, Kuniyuki Iwashima,
Eric Dumazet, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiayuan Chen <jiayuan.chen@linux.dev>
[ Upstream commit a0ab2ba83e35159d81cec830a92e885ecf8139be ]
A listener's TCP_FASTOPEN max_qlen stops being accurate and lets through
far more pending Fast Open requests than it was configured for.
This only shows up with SO_REUSEPORT listener migration, where closing a
listener hands its still-pending TFO children over to a surviving one.
fastopenq.qlen is charged in tcp_fastopen_create_child() when the child
is created and uncharged in reqsk_fastopen_remove() when the handshake
completes. The uncharge follows rsk_listener of the request the child
points at, and inet_reqsk_clone() has repointed the child at a new
request owned by the new listener, so the ++ and the -- land on two
different sockets. The new listener's qlen drifts negative and its
limit no longer binds.
Charge the new listener during migration, like reqsk_queue_migrated()
already does for queue->young and queue->qlen.
Fixes: 54b92e841937 ("tcp: Migrate TCP_ESTABLISHED/TCP_SYN_RECV sockets in accept queues.")
Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260803061739.134737-1-jiayuan.chen@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv4/inet_connection_sock.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 5ff45bc854422..91dcdb7567ace 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -987,11 +987,23 @@ static struct request_sock *inet_reqsk_clone(struct request_sock *req,
nreq->rsk_listener = sk;
- /* We need not acquire fastopenq->lock
- * because the child socket is locked in inet_csk_listen_stop().
- */
- if (sk->sk_protocol == IPPROTO_TCP && tcp_rsk(nreq)->tfo_listener)
+ if (sk->sk_protocol == IPPROTO_TCP && tcp_rsk(nreq)->tfo_listener) {
+ struct fastopen_queue *fastopenq;
+
+ /* reqsk_fastopen_remove() will uncharge nreq->rsk_listener,
+ * that is @sk, so charge it here. Unlike the listener
+ * being closed, @sk is live and needs its lock.
+ */
+ fastopenq = &inet_csk(sk)->icsk_accept_queue.fastopenq;
+ spin_lock_bh(&fastopenq->lock);
+ fastopenq->qlen++;
+ spin_unlock_bh(&fastopenq->lock);
+
+ /* We need not acquire fastopenq->lock
+ * because the child socket is locked in inet_csk_listen_stop().
+ */
rcu_assign_pointer(tcp_sk(nreq->sk)->fastopen_rsk, nreq);
+ }
return nreq;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 053/181] net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (51 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 052/181] tcp: fix TFO max_qlen accounting across reuseport migration Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 054/181] net: prestera: validate firmware header length Greg Kroah-Hartman
` (130 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Henry Martin, Jakub Kicinski,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Henry Martin <bsdhenrymartin@gmail.com>
[ Upstream commit afa58b7384913c8773d837acdb07b035690ec5d2 ]
ncsi_send_cmd_nl() takes the number of bytes to copy from the
attacker-controlled ncsi_pkt_hdr.length field of the in-band packet
header, while the source buffer is the NCSI_ATTR_DATA netlink
attribute whose readable size is nla_len() - sizeof(ncsi_pkt_hdr).
The two length sources are never cross-checked: only
nla_len() >= sizeof(struct ncsi_pkt_hdr) is enforced.
With hdr->length set larger than the attribute payload (up to 65535
against at most 2032 readable bytes), ncsi_cmd_handler_oem() copies
past the end of the netlink attribute buffer with unsafe_memcpy(),
leaking up to ~64KB of kernel heap memory into the transmitted NCSI
command packet. The destination skb is sized by the declared payload,
so the write side does not overflow - this is a pure OOB read /
information leak, reachable with CAP_NET_ADMIN on systems with a
registered NCSI device (e.g. OpenBMC on Aspeed BMC SoCs, where
NET_NCSI=y is standard).
Reject commands whose declared payload extends past the end of the
data attribute.
The issue was found by the autokbug dynamic kernel fuzzer at Tencent
Yunding Lab.
Fixes: 9771b8ccdfa6 ("net/ncsi: Extend NC-SI Netlink interface to allow user space to send NC-SI command")
Reported-by: Henry Martin <bsdhenrymartin@gmail.com>
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
Link: https://patch.msgid.link/20260803043618.3210301-1-bsdhenrymartin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ncsi/ncsi-netlink.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/ncsi/ncsi-netlink.c b/net/ncsi/ncsi-netlink.c
index 2f872d064396d..8cc538358f6a3 100644
--- a/net/ncsi/ncsi-netlink.c
+++ b/net/ncsi/ncsi-netlink.c
@@ -461,6 +461,10 @@ static int ncsi_send_cmd_nl(struct sk_buff *msg, struct genl_info *info)
nca.req_flags = NCSI_REQ_FLAG_NETLINK_DRIVEN;
nca.info = info;
nca.payload = ntohs(hdr->length);
+ if (nca.payload > len - sizeof(*hdr)) {
+ ret = -EINVAL;
+ goto out_netlink;
+ }
nca.data = data + sizeof(*hdr);
ret = ncsi_xmit_cmd(&nca);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 054/181] net: prestera: validate firmware header length
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (52 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 053/181] net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 055/181] net: remove WARN_ON_ONCE() from sk_mc_loop() Greg Kroah-Hartman
` (129 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Pengpeng Hou, Elad Nachman,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pengpeng Hou <pengpeng@iscas.ac.cn>
[ Upstream commit 8ae344eb540af3f457179b52bc6061416752485c ]
prestera_fw_hdr_parse() reads the firmware header before checking
that the firmware image contains that header.
Reject images shorter than struct prestera_fw_header before decoding the
magic and version fields.
Fixes: 4c2703dfd7fabb ("net: marvell: prestera: Add PCI interface support")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Acked-by: Elad Nachman <enachman@marvell.com>
Link: https://patch.msgid.link/20260731141500.1-prestera-v2-pengpeng@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/marvell/prestera/prestera_pci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
index 35857dc19542f..5db2c9e5e077d 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
@@ -684,6 +684,9 @@ static int prestera_fw_hdr_parse(struct prestera_fw *fw)
struct prestera_fw_header *hdr;
u32 magic;
+ if (fw->bin->size < sizeof(*hdr))
+ return -EINVAL;
+
hdr = (struct prestera_fw_header *)fw->bin->data;
magic = be32_to_cpu(hdr->magic_number);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 055/181] net: remove WARN_ON_ONCE() from sk_mc_loop()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (53 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 054/181] net: prestera: validate firmware header length Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 056/181] net/smc: fix TOCTOU race between smc_listen_out() and listener close Greg Kroah-Hartman
` (128 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+22c3218a6fa219e47321,
Eric Dumazet, Paolo Abeni, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit b8a39a09ae4eaae04309e1e38ed6a1101d967496 ]
sk_mc_loop() can be called for sockets that are neither AF_INET
nor AF_INET6 (e.g. AF_PACKET sockets when sending packets via raw/packet
socket over virtual devices such as VRF or ipvlan).
In such cases, sk_family is not AF_INET/AF_INET6 and sk_mc_loop() falls
through the switch statement and triggers WARN_ON_ONCE(1).
Non-INET sockets do not support IP_MULTICAST_LOOP or IPV6_MULTICAST_LOOP
options, so loopback should default to true without generating a warning.
Fixes: f60e5990d9c1 ("ipv6: protect skb->sk accesses from recursive dereference inside the stack")
Reported-by: syzbot+22c3218a6fa219e47321@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/6a72024c.13623e66.bdc14.0019.GAE@google.com/T/#u
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260804152048.2134341-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/core/sock.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/net/core/sock.c b/net/core/sock.c
index 4a09e780406fe..e8b03cf3a428c 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -773,7 +773,6 @@ bool sk_mc_loop(const struct sock *sk)
return inet6_test_bit(MC6_LOOP, sk);
#endif
}
- WARN_ON_ONCE(1);
return true;
}
EXPORT_SYMBOL(sk_mc_loop);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 056/181] net/smc: fix TOCTOU race between smc_listen_out() and listener close
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (54 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 055/181] net: remove WARN_ON_ONCE() from sk_mc_loop() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 057/181] net: thunderbolt: Tear down DMA paths before stopping the rings Greg Kroah-Hartman
` (127 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mahanta Jambigi, Sidraya Jayagond,
Breno Leitao, Dust Li, Paolo Abeni, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sidraya Jayagond <sidraya@linux.ibm.com>
[ Upstream commit 185a4caeecabc150106deda1da170b09f2ad803f ]
smc_listen_out() reads lsmc->sk.sk_state without the listener lock,
then acquires lock_sock_nested() only after the check passes. This
opens a window where smc_close_active() can transition the listener
to SMC_CLOSED, call smc_close_cleanup_listen() to drain the accept
queue, and release the lock, all between the lockless read and the
delayed lock acquisition:
smc_listen_work (smc_hs_wq) smc_close_active()
------------------------------- -------------------------
release_sock(child)
if (sk_state == SMC_LISTEN) TRUE
lock_sock(listener)
sk_state = SMC_CLOSED
smc_close_cleanup_listen()
release_sock(listener)
flush_work(tcp_listen_work)
lock_sock_nested(listener)
smc_accept_enqueue(listener, child) /* child enqueued on dead listener */
smc_close_active() flushes only tcp_listen_work. Work items already
dispatched onto smc_hs_wq for the CLC handshake continue running
unguarded. smc_accept_enqueue() takes a sock_hold() on the child that
is never released, so the child smc_sock, its clcsock, and the
reference all leak. A remote peer that opens TCP connections while the
server calls close() can exhaust kernel memory.
Move lock_sock_nested() to before the sk_state check so that the test
and the enqueue are atomic under the listener lock.
Fixes: fd57770dd198 ("net/smc: wait for pending work before clcsock release_sock")
Reviewed-by: Mahanta Jambigi <mjambigi@linux.ibm.com>
Signed-off-by: Sidraya Jayagond <sidraya@linux.ibm.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Link: https://patch.msgid.link/20260803070701.126339-1-sidraya@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/smc/af_smc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 8d740f588a771..8e95839161aa1 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1933,11 +1933,12 @@ static void smc_listen_out(struct smc_sock *new_smc)
atomic_dec(&lsmc->queued_smc_hs);
release_sock(newsmcsk); /* lock in smc_listen_work() */
+ lock_sock_nested(&lsmc->sk, SINGLE_DEPTH_NESTING);
if (lsmc->sk.sk_state == SMC_LISTEN) {
- lock_sock_nested(&lsmc->sk, SINGLE_DEPTH_NESTING);
smc_accept_enqueue(&lsmc->sk, newsmcsk);
release_sock(&lsmc->sk);
} else { /* no longer listening */
+ release_sock(&lsmc->sk);
smc_close_non_accepted(newsmcsk);
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 057/181] net: thunderbolt: Tear down DMA paths before stopping the rings
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (55 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 056/181] net/smc: fix TOCTOU race between smc_listen_out() and listener close Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 058/181] ata: pata_sl82c105: fix bridge revision use-after-free Greg Kroah-Hartman
` (126 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Fan XinRan, Mika Westerberg,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Fan XinRan <shinjiangjiang@gmail.com>
[ Upstream commit 68bf02b6b4ad3f748c6db71fd77b6c0402d252f4 ]
tbnet_tear_down() stops both rings and frees their frame buffers before
calling tb_xdomain_disable_paths(). tb_ring_stop() zeroes the ring's
descriptor base and tbnet_free_buffers() unmaps and frees the pages the
frames sit in, so by the time __tb_path_deactivate_hop() polls the hop's
'pending' bit, anything still in flight has nowhere to drain to.
The teardown sequence has been in this order since the driver was added.
The setup path has not: commit ff7cd07f3064 ("net: thunderbolt: Enable
DMA paths only after rings are enabled") moved the path enable to the end
of tbnet_connected_work() and documented why:
/* Both logins successful so enable the rings, high-speed DMA
* paths and start the network device queue.
*
* Note we enable the DMA paths last to make sure we have primed
* the Rx ring before any incoming packets are allowed to
* arrive.
*/
Teardown was never updated to match, so the rings and the paths now come
down in the same order they go up instead of in reverse.
On an ASMedia ASM4242 host router the 'pending' bit then never clears:
every teardown burns the full 500 ms timeout and
__tb_path_deactivate_hop() returns -ETIMEDOUT. Raising the timeout to
5 s does not help, so the hop is not slow to drain, it never drains
at all.
The failure is invisible above the thunderbolt core.
__tb_path_deactivate_hops() is void and only calls tb_port_warn();
tb_path_deactivate(), tb_tunnel_deactivate() and
__tb_disconnect_xdomain_paths() are void as well, and
tb_disconnect_xdomain_paths() ends in an unconditional "return 0". So
tb_xdomain_disable_paths() reports success and the netdev_warn() below
it never fires. Repeated teardowns eventually take the XDomain control
channel down, after which the peer node is gone and only a power cycle
brings the controller back.
Deactivating the paths first fixes it. Measured with kretprobes on a
stock v6.17 tree with no other patches applied, on a link that was up
and had just carried traffic:
before: __tb_path_deactivate_hop() returns 0 for the first hop, then
-ETIMEDOUT for the second 500335 us later
after: 0 for both, 525 us apart
Alternating the two orderings ABBA over three load levels, four
teardowns per arm: every teardown failed before the change (21 of 21
that ran), none failed after (0 of 24). The before arms ran short
because the link died partway through. The same split shows up when
the interface is enslaved to a bond instead of just brought down, which
is how I ran into this in the first place. Throughput and latency after
the change are unchanged.
Hosts whose routers drain the hop despite the stale descriptor base see
no functional difference, since the paths end up deactivated either way.
Fixes: e69b6c02b4c3 ("net: Add support for networking over Thunderbolt cable")
Signed-off-by: Fan XinRan <shinjiangjiang@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://patch.msgid.link/20260803-b4-tbnet-teardown-v2-1-27de6a13ca2d@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/thunderbolt/main.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/drivers/net/thunderbolt/main.c b/drivers/net/thunderbolt/main.c
index 960839a651e51..ceaba08cd378a 100644
--- a/drivers/net/thunderbolt/main.c
+++ b/drivers/net/thunderbolt/main.c
@@ -389,11 +389,16 @@ static void tbnet_tear_down(struct tbnet *net, bool send_logout)
break;
}
- tb_ring_stop(net->rx_ring.ring);
- tb_ring_stop(net->tx_ring.ring);
- tbnet_free_buffers(&net->rx_ring);
- tbnet_free_buffers(&net->tx_ring);
-
+ /* Tear the paths down before stopping the rings. This mirrors
+ * tbnet_connected_work(), which enables the paths last so the
+ * Rx ring is primed before packets can arrive. Stopping a
+ * ring zeroes its descriptor base and tbnet_free_buffers()
+ * unmaps and frees the frame buffers, leaving anything still
+ * in flight with nowhere to drain to;
+ * __tb_path_deactivate_hop() then waits for the hop's
+ * 'pending' bit, which on some host routers never clears in
+ * that state.
+ */
ret = tb_xdomain_disable_paths(net->xd,
net->local_transmit_path,
net->tx_ring.ring->hop,
@@ -402,6 +407,11 @@ static void tbnet_tear_down(struct tbnet *net, bool send_logout)
if (ret)
netdev_warn(net->dev, "failed to disable DMA paths\n");
+ tb_ring_stop(net->rx_ring.ring);
+ tb_ring_stop(net->tx_ring.ring);
+ tbnet_free_buffers(&net->rx_ring);
+ tbnet_free_buffers(&net->tx_ring);
+
tb_xdomain_release_in_hopid(net->xd, net->remote_transmit_path);
net->remote_transmit_path = 0;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 058/181] ata: pata_sl82c105: fix bridge revision use-after-free
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (56 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 057/181] net: thunderbolt: Tear down DMA paths before stopping the rings Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 059/181] net/atm: fix slab-out-of-bounds read in vcc_setsockopt() Greg Kroah-Hartman
` (125 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Hongyan Xu, Niklas Cassel,
Damien Le Moal, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hongyan Xu <getshell@seu.edu.cn>
[ Upstream commit 7700a31039cdc6715cb6cce7e7a664ee4e945f67 ]
pci_get_slot() returns a referenced PCI device. Commit 44c10138fd4b
("PCI: Change all drivers to use pci_device->revision") replaced a
configuration-space read with direct access to the cached revision field,
but left that access after pci_dev_put(). The bridge may therefore be freed
before its revision is read.
Read the revision before dropping the reference.
Fixes: 44c10138fd4b ("PCI: Change all drivers to use pci_device->revision")
Signed-off-by: Hongyan Xu <getshell@seu.edu.cn>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/ata/pata_sl82c105.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 93882e976ede4..2a5ce46af5a0a 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -264,6 +264,7 @@ static struct ata_port_operations sl82c105_port_ops = {
static int sl82c105_bridge_revision(struct pci_dev *pdev)
{
struct pci_dev *bridge;
+ u8 revision;
/*
* The bridge should be part of the same device, but function 0.
@@ -285,8 +286,9 @@ static int sl82c105_bridge_revision(struct pci_dev *pdev)
/*
* We need to find function 0's revision, not function 1
*/
+ revision = bridge->revision;
pci_dev_put(bridge);
- return bridge->revision;
+ return revision;
}
static void sl82c105_fixup(struct pci_dev *pdev)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 059/181] net/atm: fix slab-out-of-bounds read in vcc_setsockopt()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (57 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 058/181] ata: pata_sl82c105: fix bridge revision use-after-free Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 060/181] sctp: clear control chunk transport if it is being removed Greg Kroah-Hartman
` (124 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+53ecc09fb81df10ef4de,
Eric Dumazet, Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit d0c80dbb970439bd2eeb0e5effff8c16a5f4e1e3 ]
vcc_setsockopt() contained an ineffective optlen check:
if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
return -EINVAL;
If __SO_LEVEL_MATCH(optname, level) evaluated to false (e.g. if the caller
passed a mismatched level), the length check optlen != __SO_SIZE(optname)
was short-circuited and bypassed. Execution then fell through to switch(optname),
calling copy_from_sockptr() assuming optval contained sufficient space.
Furthermore, even if level matched, a cgroup BPF setsockopt filter could shrink
optlen after entry. Because copy_from_sockptr() on kernel pointers uses memcpy(),
this leads to a KASAN slab-out-of-bounds read when optlen is smaller than the
expected structure size.
Fix this by using copy_safe_from_sockptr(), which unconditionally validates
that optlen is at least the expected size before copying. Also change the local
'value' variable type from 'unsigned long' to 'int' so that SO_SETCLP matches
its sizeof(int) ABI encoding on 64-bit systems.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot+53ecc09fb81df10ef4de@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=53ecc09fb81df10ef4de
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260805131508.3227331-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/atm/common.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/net/atm/common.c b/net/atm/common.c
index 196c36269b34f..413863861bcaa 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -760,7 +760,7 @@ int vcc_setsockopt(struct socket *sock, int level, int optname,
sockptr_t optval, unsigned int optlen)
{
struct atm_vcc *vcc;
- unsigned long value;
+ int value;
int error;
if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
@@ -772,8 +772,10 @@ int vcc_setsockopt(struct socket *sock, int level, int optname,
{
struct atm_qos qos;
- if (copy_from_sockptr(&qos, optval, sizeof(qos)))
- return -EFAULT;
+ error = copy_safe_from_sockptr(&qos, sizeof(qos), optval,
+ optlen);
+ if (error)
+ return error;
error = check_qos(&qos);
if (error)
return error;
@@ -786,8 +788,10 @@ int vcc_setsockopt(struct socket *sock, int level, int optname,
return 0;
}
case SO_SETCLP:
- if (copy_from_sockptr(&value, optval, sizeof(value)))
- return -EFAULT;
+ error = copy_safe_from_sockptr(&value, sizeof(value), optval,
+ optlen);
+ if (error)
+ return error;
if (value)
vcc->atm_options |= ATM_ATMOPT_CLP;
else
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 060/181] sctp: clear control chunk transport if it is being removed
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (58 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 059/181] net/atm: fix slab-out-of-bounds read in vcc_setsockopt() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 061/181] tls: dont abort the connection on signal-interrupted sends Greg Kroah-Hartman
` (123 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Daniele Linguaglossa, Xin Long,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xin Long <lucien.xin@gmail.com>
[ Upstream commit c9158ceaf27780ef64534ad72f44ffde3f8ccc49 ]
sctp_make_heartbeat_ack() caches the destination transport in
chunk->transport without taking a reference. When src_out_of_asoc_ok is
enabled, the HEARTBEAT ACK may remain queued on control_chunk_list instead
of being transmitted immediately.
If the peer transport is removed while the chunk is still queued,
sctp_assoc_rm_peer() drops the transport and schedules it for RCU freeing,
but only clears cached transport pointers in out_chunk_list. The queued
control chunk therefore retains a dangling transport pointer.
Once an ASCONF_ACK clears the suppression and the queued control chunk is
transmitted, SCTP dereferences the stale transport pointer, leading to a
use-after-free.
Fix this by also clearing chunk->transport for queued control chunks in
control_chunk_list when removing the transport.
Fixes: 8a07eb0a50ae ("sctp: Add ASCONF operation on the single-homed host")
Reported-by: Daniele Linguaglossa <danielelinguaglossa@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/7e1168cb722132152a29d47e5eafaeac4a3bf6f3.1785943120.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/sctp/associola.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 44f06c5f1f256..ebdc48be47813 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -573,6 +573,10 @@ void sctp_assoc_rm_peer(struct sctp_association *asoc,
if (ch->transport == peer)
ch->transport = NULL;
+ list_for_each_entry(ch, &asoc->outqueue.control_chunk_list, list)
+ if (ch->transport == peer)
+ ch->transport = NULL;
+
asoc->peer.transport_count--;
sctp_ulpevent_notify_peer_addr_change(peer, SCTP_ADDR_REMOVED, 0);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 061/181] tls: dont abort the connection on signal-interrupted sends
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (59 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 060/181] sctp: clear control chunk transport if it is being removed Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 062/181] hwmon: (corsair-psu) fix possible out-of-bounds access on missing string termination Greg Kroah-Hartman
` (122 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Maximilian Immanuel Brandtner,
Jakub Kicinski, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Maximilian Immanuel Brandtner <maxbr@linux.ibm.com>
[ Upstream commit af0e5cdd031f4f4a8f6d4160bfbda4f36872b0ed ]
When a signal interrupts a blocking send, tls_tx_records() treats the
resulting -ERESTARTSYS as a transmission failure and marks the socket
errored via tls_err_abort() with the raw error code. Later syscalls
return the kernel-internal errno 512 (ERESTARTSYS) to userspace, as the
signal it stems from is no longer pending during syscall exit and thus
never translated.
An interrupted send is not a connection error: the partially sent record
stays queued and is resent later. Interrupt error codes are therefore
excluded from the abort in the same way as -EAGAIN.
Fixes: b341ca51d267 ("tls: Fix tls_sw_sendmsg error handling")
Signed-off-by: Maximilian Immanuel Brandtner <maxbr@linux.ibm.com>
Link: https://patch.msgid.link/20260805063109.1772314-1-maxbr@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/tls/tls_sw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 2b875369d5232..137a7914c3044 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -458,7 +458,7 @@ int tls_tx_records(struct sock *sk, int flags)
}
tx_err:
- if (rc < 0 && rc != -EAGAIN)
+ if (rc < 0 && rc != -EAGAIN && rc != -EINTR && rc != -ERESTARTSYS)
tls_err_abort(sk, rc);
return rc;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 062/181] hwmon: (corsair-psu) fix possible out-of-bounds access on missing string termination
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (60 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 061/181] tls: dont abort the connection on signal-interrupted sends Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 063/181] hwmon: (ads7828) Fix external VREF regulator handling Greg Kroah-Hartman
` (121 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Wilken Gottwalt, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Wilken Gottwalt <wilken.gottwalt@posteo.net>
[ Upstream commit 36c4d73ce05d1d8896c2669eb0730d35a02a2ec1 ]
In theory it could be possible that the REPLY_SIZE sized buffers for
holding the vendor and product strings could be end up missing the null
termination (for example by malicious hardware built on purpose)
required by the seq_printf() call. That limits the debugfs printf calls
to a maximum string length of REPLY_SIZE.
Fixes: d115b51e0e567 ("hwmon: add Corsair PSU HID controller driver")
Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Link: https://lore.kernel.org/r/anLj9gPWRoRDbQBV@monster.localdomain
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/corsair-psu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hwmon/corsair-psu.c b/drivers/hwmon/corsair-psu.c
index 4ab73bcef1d12..61d1b22bc63ec 100644
--- a/drivers/hwmon/corsair-psu.c
+++ b/drivers/hwmon/corsair-psu.c
@@ -709,7 +709,7 @@ static int vendor_show(struct seq_file *seqf, void *unused)
{
struct corsairpsu_data *priv = seqf->private;
- seq_printf(seqf, "%s\n", priv->vendor);
+ seq_printf(seqf, "%.*s\n", REPLY_SIZE, priv->vendor);
return 0;
}
@@ -719,7 +719,7 @@ static int product_show(struct seq_file *seqf, void *unused)
{
struct corsairpsu_data *priv = seqf->private;
- seq_printf(seqf, "%s\n", priv->product);
+ seq_printf(seqf, "%.*s\n", REPLY_SIZE, priv->product);
return 0;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 063/181] hwmon: (ads7828) Fix external VREF regulator handling
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (61 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 062/181] hwmon: (corsair-psu) fix possible out-of-bounds access on missing string termination Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 064/181] hwmon: (ltc4282) Avoid overflow in maximum power calculation Greg Kroah-Hartman
` (120 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Qingshuang Fu, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qingshuang Fu <fuqingshuang@kylinos.cn>
[ Upstream commit fddb5ceaf901b050ed2a1a7deeecbf97e003435a ]
The driver currently has two issues with the external VREF regulator
handling in ads7828_probe():
1. All errors from devm_regulator_get_optional() are ignored, causing the
driver to incorrectly fall back to internal VREF even for transient
errors like -EPROBE_DEFER or genuine failures like -ENOMEM.
2. The external regulator is never enabled. The driver calls
regulator_get_voltage() without first calling regulator_enable(),
so the VREF pin may remain unpowered if the regulator is not
configured as always-on.
Fix both issues by switching to devm_regulator_get_enable_read_voltage(),
which handles regulator get, enable, and voltage read in one call.
Only -ENODEV (no regulator specified in device tree) should trigger the
fallback to internal VREF. All other errors are propagated to the caller.
Fixes: a8ddfea09566 ("hwmon: (ads7828) Accept optional parameters from device tree")
Signed-off-by: Qingshuang Fu <fuqingshuang@kylinos.cn>
Link: https://lore.kernel.org/r/20260805061645.1331652-1-fffsqian@163.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/ads7828.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/hwmon/ads7828.c b/drivers/hwmon/ads7828.c
index 436637264056c..20ef4992f5bb8 100644
--- a/drivers/hwmon/ads7828.c
+++ b/drivers/hwmon/ads7828.c
@@ -106,12 +106,11 @@ static int ads7828_probe(struct i2c_client *client)
struct ads7828_data *data;
struct device *hwmon_dev;
unsigned int vref_mv = ADS7828_INT_VREF_MV;
- unsigned int vref_uv;
+ int vref_uv;
bool diff_input = false;
bool ext_vref = false;
unsigned int regval;
enum ads7828_chips chip;
- struct regulator *reg;
data = devm_kzalloc(dev, sizeof(struct ads7828_data), GFP_KERNEL);
if (!data)
@@ -125,9 +124,11 @@ static int ads7828_probe(struct i2c_client *client)
} else if (dev->of_node) {
diff_input = of_property_read_bool(dev->of_node,
"ti,differential-input");
- reg = devm_regulator_get_optional(dev, "vref");
- if (!IS_ERR(reg)) {
- vref_uv = regulator_get_voltage(reg);
+ vref_uv = devm_regulator_get_enable_read_voltage(dev, "vref");
+ if (vref_uv < 0) {
+ if (vref_uv != -ENODEV)
+ return vref_uv;
+ } else {
vref_mv = DIV_ROUND_CLOSEST(vref_uv, 1000);
if (vref_mv < ADS7828_EXT_VREF_MV_MIN ||
vref_mv > ADS7828_EXT_VREF_MV_MAX)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 064/181] hwmon: (ltc4282) Avoid overflow in maximum power calculation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (62 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 063/181] hwmon: (ads7828) Fix external VREF regulator handling Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 065/181] hwmon: (ltc4282) Clamp negative current limits Greg Kroah-Hartman
` (119 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sashiko, Nuno Sa, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@roeck-us.net>
[ Upstream commit edd11a94335747423569500a194c6eaa915f2963 ]
During device initialization in ltc4282_set_max_limits(), the calculation
of the maximum power limit can suffer from a 32-bit integer overflow.
static int ltc4282_set_max_limits(struct ltc4282_state *st)
{
...
st->power_max = DIV_ROUND_CLOSEST(st->vsense_max * DECA * MILLI,
st->rsense) * st->vfs_out;
...
}
The result of DIV_ROUND_CLOSEST() evaluates to a 32-bit unsigned integer
on 32-bit architectures. This result is then multiplied by st->vfs_out,
which is a 16-bit unsigned integer. According to C promotion rules, since
both operands are 32-bit or smaller, the multiplication is performed in
32-bit precision.
If the device is configured with a low sense resistor value via the device
tree (for example, 100 nano-ohms, resulting in st->rsense = 1) and the
voltage is high, the division result can reach 343,750,000 and st->vfs_out
can be 33,280. The product of these values is approximately 11.44 trillion,
which exceeds the maximum capacity of a 32-bit integer and overflows
before being stored in st->power_max.
This overflow causes a truncated value to be assigned to st->power_max and
written to the hardware limit register. An incorrect maximum power limit
can trigger spurious power-bad faults or alarms, which may lead to the
shutdown of the monitored power rail.
Avoid the problem by calculating and storing the maximum power using 64-bit
variables.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: cbc29538dbf7d ("hwmon: Add driver for LTC4282")
Cc: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/ltc4282.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/hwmon/ltc4282.c b/drivers/hwmon/ltc4282.c
index e1c0d02b564b7..93e08bde29aa9 100644
--- a/drivers/hwmon/ltc4282.c
+++ b/drivers/hwmon/ltc4282.c
@@ -142,7 +142,7 @@ struct ltc4282_state {
*/
struct ltc4282_cache in0_1_cache[LTC4282_CHAN_VGPIO];
u32 vsense_max;
- long power_max;
+ s64 power_max;
u32 rsense;
u16 vdd;
u16 vfs_out;
@@ -621,13 +621,12 @@ static int ltc4282_read(struct device *dev, enum hwmon_sensor_types type,
}
static int ltc4282_write_power_byte(const struct ltc4282_state *st, u32 reg,
- long val)
+ s64 val)
{
u32 power;
u64 temp;
- if (val > st->power_max)
- val = st->power_max;
+ val = clamp(val, 0, st->power_max);
temp = val * int_pow(U8_MAX, 2) * st->rsense;
power = DIV64_U64_ROUND_CLOSEST(temp,
@@ -637,7 +636,7 @@ static int ltc4282_write_power_byte(const struct ltc4282_state *st, u32 reg,
}
static int ltc4282_write_power_word(const struct ltc4282_state *st, u32 reg,
- long val)
+ u64 val)
{
u64 temp = int_pow(U16_MAX, 2) * st->rsense, temp_2;
__be16 __raw;
@@ -1254,7 +1253,8 @@ static int ltc4282_set_max_limits(struct ltc4282_state *st)
return ret;
/* Power is given by ISENSE * Vout. */
- st->power_max = DIV_ROUND_CLOSEST(st->vsense_max * DECA * MILLI, st->rsense) * st->vfs_out;
+ st->power_max = DIV_ROUND_CLOSEST_ULL((u64)st->vsense_max * DECA * MILLI,
+ st->rsense) * st->vfs_out;
ret = ltc4282_write_power_byte(st, LTC4282_POWER_MAX, st->power_max);
if (ret)
return ret;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 065/181] hwmon: (ltc4282) Clamp negative current limits
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (63 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 064/181] hwmon: (ltc4282) Avoid overflow in maximum power calculation Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 066/181] hwmon: (ltc4282) Fix parsing adi,current-limit-sense-microvolt Greg Kroah-Hartman
` (118 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sashiko, Nuno Sa, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@roeck-us.net>
[ Upstream commit e253dd5f9f6d875a317895bf43ec9534ed7523cb ]
When a negative value is passed to ltc4282_write_curr(), the signed long
val is cast directly to u64:
drivers/hwmon/ltc4282.c:ltc4282_write_curr() {
/* need to pass it in millivolt */
u32 in = DIV_ROUND_CLOSEST_ULL((u64)val * st->rsense, DECA * MICRO);
...
}
This cast converts negative inputs into large positive values. The
subsequent division result overflows the u32 in variable, truncating
to a pseudo-random positive value. When this is passed to
ltc4282_write_voltage_byte(), it is clamped to the maximum limit instead
of zero.
Clamp val to 0 and to the maximum supported upper limit before the cast
and assign the result to a 64-bit temporary variable before the division
to avoid the underflow and an also possible overflow.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: cbc29538dbf7d ("hwmon: Add driver for LTC4282")
Cc: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/ltc4282.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/ltc4282.c b/drivers/hwmon/ltc4282.c
index 93e08bde29aa9..0e7449db3158f 100644
--- a/drivers/hwmon/ltc4282.c
+++ b/drivers/hwmon/ltc4282.c
@@ -15,6 +15,7 @@
#include <linux/hwmon-sysfs.h>
#include <linux/i2c.h>
#include <linux/math.h>
+#include <linux/math64.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
@@ -945,8 +946,11 @@ static int ltc4282_curr_reset_hist(struct ltc4282_state *st)
static int ltc4282_write_curr(struct ltc4282_state *st, u32 attr,
long val)
{
+ s32 ulimit = min_t(u64, INT_MAX,
+ div_u64((u64)INT_MAX * DECA * MICRO, st->rsense));
+ u64 val64 = clamp(val, 0, ulimit);
/* need to pass it in millivolt */
- u32 in = DIV_ROUND_CLOSEST_ULL((u64)val * st->rsense, DECA * MICRO);
+ u32 in = DIV_ROUND_CLOSEST_ULL(val64 * st->rsense, DECA * MICRO);
switch (attr) {
case hwmon_curr_max:
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 066/181] hwmon: (ltc4282) Fix parsing adi,current-limit-sense-microvolt
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (64 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 065/181] hwmon: (ltc4282) Clamp negative current limits Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 067/181] mm/vmscan: wake up flushers conditionally to avoid cgroup OOM Greg Kroah-Hartman
` (117 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sashiko, Nuno Sa, Guenter Roeck,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@roeck-us.net>
[ Upstream commit 335698fd7f60b6707b21fda725f97f35fa956b07 ]
ltc4282_parse_dt() evaluates the wrong variable when parsing the current
limit.
When the adi,current-limit-sense-microvolt property is parsed into
st->vsense_max, the subsequent switch statement evaluates the unrelated
val variable instead of st->vsense_max:
drivers/hwmon/ltc4282.c:ltc4282_parse_dt() {
...
ret = device_property_read_u32(dev, "adi,current-limit-sense-microvolt",
&st->vsense_max);
if (!ret) {
int reg_val;
switch (val) {
case 12500:
reg_val = 0;
break;
...
}
Because val holds a small integer representing vin_mode (from 0 to 3), it
never matches any of the valid current limit cases.
This causes it to always fall through to the default error case, return
-EINVAL, and aborts probe initialization for any device tree using this
property.
Validate st->vsense_max instead to fix the problem.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: cbc29538dbf7d ("hwmon: Add driver for LTC4282")
Cc: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/ltc4282.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwmon/ltc4282.c b/drivers/hwmon/ltc4282.c
index 0e7449db3158f..5f7ab813051c8 100644
--- a/drivers/hwmon/ltc4282.c
+++ b/drivers/hwmon/ltc4282.c
@@ -1425,7 +1425,7 @@ static int ltc4282_setup(struct ltc4282_state *st, struct device *dev)
if (!ret) {
int reg_val;
- switch (val) {
+ switch (st->vsense_max) {
case 12500:
reg_val = 0;
break;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 067/181] mm/vmscan: wake up flushers conditionally to avoid cgroup OOM
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (65 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 066/181] hwmon: (ltc4282) Fix parsing adi,current-limit-sense-microvolt Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 068/181] net: fec: do not release NULL pages when RX buffer allocation fails Greg Kroah-Hartman
` (116 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Wei Xu, Zeng Jingxiang, Kairui Song,
Chris Li, T.J. Mercier, Yu Zhao, Andrew Morton, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zeng Jingxiang <linuszeng@tencent.com>
[ Upstream commit 1bc542c6a0d1444559ab75823a89a94d244bf933 ]
Commit 14aa8b2d5c2e ("mm/mglru: don't sync disk for each aging cycle")
removed the opportunity to wake up flushers during the MGLRU page
reclamation process can lead to an increased likelihood of triggering OOM
when encountering many dirty pages during reclamation on MGLRU.
This leads to premature OOM if there are too many dirty pages in cgroup:
Killed
dd invoked oom-killer: gfp_mask=0x101cca(GFP_HIGHUSER_MOVABLE|__GFP_WRITE),
order=0, oom_score_adj=0
Call Trace:
<TASK>
dump_stack_lvl+0x5f/0x80
dump_stack+0x14/0x20
dump_header+0x46/0x1b0
oom_kill_process+0x104/0x220
out_of_memory+0x112/0x5a0
mem_cgroup_out_of_memory+0x13b/0x150
try_charge_memcg+0x44f/0x5c0
charge_memcg+0x34/0x50
__mem_cgroup_charge+0x31/0x90
filemap_add_folio+0x4b/0xf0
__filemap_get_folio+0x1a4/0x5b0
? srso_return_thunk+0x5/0x5f
? __block_commit_write+0x82/0xb0
ext4_da_write_begin+0xe5/0x270
generic_perform_write+0x134/0x2b0
ext4_buffered_write_iter+0x57/0xd0
ext4_file_write_iter+0x76/0x7d0
? selinux_file_permission+0x119/0x150
? srso_return_thunk+0x5/0x5f
? srso_return_thunk+0x5/0x5f
vfs_write+0x30c/0x440
ksys_write+0x65/0xe0
__x64_sys_write+0x1e/0x30
x64_sys_call+0x11c2/0x1d50
do_syscall_64+0x47/0x110
entry_SYSCALL_64_after_hwframe+0x76/0x7e
memory: usage 308224kB, limit 308224kB, failcnt 2589
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
...
file_dirty 303247360
file_writeback 0
...
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=test,
mems_allowed=0,oom_memcg=/test,task_memcg=/test,task=dd,pid=4404,uid=0
Memory cgroup out of memory: Killed process 4404 (dd) total-vm:10512kB,
anon-rss:1152kB, file-rss:1824kB, shmem-rss:0kB, UID:0 pgtables:76kB
oom_score_adj:0
The flusher wake up was removed to decrease SSD wearing, but if we are
seeing all dirty folios at the tail of an LRU, not waking up the flusher
could lead to thrashing easily. So wake it up when a memcg is about to
OOM due to dirty caches.
I did run the build kernel test[1] on V6, with -j16 1G memcg on my local
branch:
Without the patch(10 times):
user 1449.394
system 368.78 372.58 363.03 362.31 360.84 372.70 368.72 364.94 373.51
366.58 (avg 367.399)
real 164.883
With the V6 patch(10 times):
user 1447.525
system 360.87 360.63 372.39 364.09 368.49 365.15 359.93 362.04 359.72
354.60 (avg 362.79)
real 164.514
Test results show that this patch has about 1% performance improvement,
which should be caused by noise.
Link: https://lkml.kernel.org/r/20241026115714.1437435-1-jingxiangzeng.cas@gmail.com
Link: https://lore.kernel.org/all/CACePvbV4L-gRN9UKKuUnksfVJjOTq_5Sti2-e=pb_w51kucLKQ@mail.gmail.com/ [1]
Fixes: 14aa8b2d5c2e ("mm/mglru: don't sync disk for each aging cycle")
Suggested-by: Wei Xu <weixugc@google.com>
Signed-off-by: Zeng Jingxiang <linuszeng@tencent.com>
Signed-off-by: Kairui Song <kasong@tencent.com>
Reviewed-by: Wei Xu <weixugc@google.com>
Tested-by: Chris Li <chrisl@kernel.org>
Cc: T.J. Mercier <tjmercier@google.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
mm/vmscan.c | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index deeb4310fd54c..20f4cb33d8e8a 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4313,6 +4313,7 @@ static bool sort_folio(struct lruvec *lruvec, struct folio *folio, struct scan_c
int tier_idx)
{
bool success;
+ bool dirty, writeback;
int gen = folio_lru_gen(folio);
int type = folio_is_file_lru(folio);
int zone = folio_zonenum(folio);
@@ -4358,9 +4359,17 @@ static bool sort_folio(struct lruvec *lruvec, struct folio *folio, struct scan_c
return true;
}
+ dirty = folio_test_dirty(folio);
+ writeback = folio_test_writeback(folio);
+ if (type == LRU_GEN_FILE && dirty) {
+ sc->nr.file_taken += delta;
+ if (!writeback)
+ sc->nr.unqueued_dirty += delta;
+ }
+
/* waiting for writeback */
- if (folio_test_locked(folio) || folio_test_writeback(folio) ||
- (type == LRU_GEN_FILE && folio_test_dirty(folio))) {
+ if (folio_test_locked(folio) || writeback ||
+ (type == LRU_GEN_FILE && dirty)) {
gen = folio_inc_gen(lruvec, folio, true);
list_move(&folio->lru, &lrugen->folios[gen][type][zone]);
return true;
@@ -4476,7 +4485,8 @@ static int scan_folios(struct lruvec *lruvec, struct scan_control *sc,
trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, MAX_LRU_BATCH,
scanned, skipped, isolated,
type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON);
-
+ if (type == LRU_GEN_FILE)
+ sc->nr.file_taken += isolated;
/*
* There might not be eligible folios due to reclaim_idx. Check the
* remaining to prevent livelock if it's not making progress.
@@ -4610,6 +4620,7 @@ static int evict_folios(struct lruvec *lruvec, struct scan_control *sc, int swap
return scanned;
retry:
reclaimed = shrink_folio_list(&list, pgdat, sc, &stat, false);
+ sc->nr.unqueued_dirty += stat.nr_unqueued_dirty;
sc->nr_reclaimed += reclaimed;
trace_mm_vmscan_lru_shrink_inactive(pgdat->node_id,
scanned, reclaimed, &stat, sc->priority,
@@ -4821,6 +4832,13 @@ static bool try_to_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)
cond_resched();
}
+ /*
+ * If too many file cache in the coldest generation can't be evicted
+ * due to being dirty, wake up the flusher.
+ */
+ if (sc->nr.unqueued_dirty && sc->nr.unqueued_dirty == sc->nr.file_taken)
+ wakeup_flusher_threads(WB_REASON_VMSCAN);
+
/* whether this lruvec should be rotated */
return nr_to_scan < 0;
}
@@ -5966,6 +5984,7 @@ static void shrink_node(pg_data_t *pgdat, struct scan_control *sc)
bool reclaimable = false;
if (lru_gen_enabled() && root_reclaim(sc)) {
+ memset(&sc->nr, 0, sizeof(sc->nr));
lru_gen_shrink_node(pgdat, sc);
return;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 068/181] net: fec: do not release NULL pages when RX buffer allocation fails
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (66 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 067/181] mm/vmscan: wake up flushers conditionally to avoid cgroup OOM Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 069/181] spi: spi-fsl-dspi: Avoid setup_accel logic for DMA transfers Greg Kroah-Hartman
` (115 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Mehmet Fide, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mehmet Fide <mehmet.fide@screeningeagle.com>
fec_enet_alloc_rxq_buffers() leaves the loop as soon as
page_pool_dev_alloc_pages() returns NULL and jumps to err_alloc, which
calls fec_enet_free_buffers(). That helper walks the whole ring and
hands every rx_skb_info[i].page to page_pool_put_full_page(), including
the entries the allocation loop never reached. Those are still NULL,
because the queue was allocated with kzalloc(), and
page_pool_put_full_page() dereferences the page, so an open that runs
out of memory oopses instead of returning -ENOMEM:
Unable to handle kernel NULL pointer dereference at virtual address 00000014 when read
Internal error: Oops: 5 [#1] SMP ARM
CPU: 0 PID: 384 Comm: connmand Not tainted 6.18.43 #1
Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
PC is at fec_enet_free_buffers+0xb0/0x2a8
Call trace:
fec_enet_free_buffers from fec_enet_open+0x1e0/0x504
fec_enet_open from __dev_open+0x114/0x238
__dev_open from __dev_change_flags+0x190/0x208
__dev_change_flags from netif_change_flags+0x1c/0x58
netif_change_flags from dev_change_flags+0x44/0x74
dev_change_flags from devinet_ioctl+0x3a4/0x768
Seen on a Colibri VF50, 128 MiB of RAM, on the first ifup after boot.
Skip the entries that hold no page, and clear the ones that do after
releasing them, so that a later failed open cannot release the same page
a second time.
Mainline is not affected. Commit a2ae70c0efe4 ("net: fec: add
fec_alloc_rxq_buffers_pp() to allocate buffers from page pool") replaced
this loop with fec_free_rxq_buffers(), which skips and clears the empty
entries. That commit is part of the XDP zero copy series and is not a
stable candidate, so this is the equivalent minimal fix for 6.18.y.
Fixes: 95698ff6177b ("net: fec: using page pool to manage RX buffers")
Cc: stable@vger.kernel.org
Signed-off-by: Mehmet Fide <mehmet.fide@screeningeagle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/freescale/fec_main.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index d8189c433847c..22cd47d19ce24 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3323,8 +3323,15 @@ static void fec_enet_free_buffers(struct net_device *ndev)
for (q = 0; q < fep->num_rx_queues; q++) {
rxq = fep->rx_queue[q];
- for (i = 0; i < rxq->bd.ring_size; i++)
- page_pool_put_full_page(rxq->page_pool, rxq->rx_skb_info[i].page, false);
+ for (i = 0; i < rxq->bd.ring_size; i++) {
+ struct page *page = rxq->rx_skb_info[i].page;
+
+ if (!page)
+ continue;
+
+ page_pool_put_full_page(rxq->page_pool, page, false);
+ rxq->rx_skb_info[i].page = NULL;
+ }
for (i = 0; i < XDP_STATS_TOTAL; i++)
rxq->stats[i] = 0;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 069/181] spi: spi-fsl-dspi: Avoid setup_accel logic for DMA transfers
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (67 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 068/181] net: fec: do not release NULL pages when RX buffer allocation fails Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 070/181] mtd: spinand: fix direct mapping creation sizes Greg Kroah-Hartman
` (114 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Larisa Grigore, James Clark,
Mark Brown, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Larisa Grigore <larisa.grigore@nxp.com>
[ Upstream commit cac7e5054115fcc41b1cb050af8e8971f7c9b22b ]
Repacking multiple smaller words into larger ones to make use of the
full FIFO doesn't save anything in DMA mode, so don't bother doing it.
Signed-off-by: Larisa Grigore <larisa.grigore@nxp.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Link: https://patch.msgid.link/20250522-james-nxp-spi-v2-8-bea884630cfb@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-fsl-dspi.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index e26363ae74890..bc7479c834ff6 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -746,8 +746,12 @@ static void dspi_setup_accel(struct fsl_dspi *dspi)
struct spi_transfer *xfer = dspi->cur_transfer;
bool odd = !!(dspi->len & 1);
- /* No accel for frames not multiple of 8 bits at the moment */
- if (xfer->bits_per_word % 8)
+ /*
+ * No accel for DMA transfers or frames not multiples of 8 bits at the
+ * moment.
+ */
+ if (dspi->devtype_data->trans_mode == DSPI_DMA_MODE ||
+ xfer->bits_per_word % 8)
goto no_accel;
if (!odd && dspi->len <= dspi->devtype_data->fifo_size * 2) {
@@ -756,10 +760,7 @@ static void dspi_setup_accel(struct fsl_dspi *dspi)
dspi->oper_bits_per_word = 8;
} else {
/* Start off with maximum supported by hardware */
- if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
- dspi->oper_bits_per_word = 32;
- else
- dspi->oper_bits_per_word = 16;
+ dspi->oper_bits_per_word = 32;
/*
* And go down only if the buffer can't be sent with
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 070/181] mtd: spinand: fix direct mapping creation sizes
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (68 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 069/181] spi: spi-fsl-dspi: Avoid setup_accel logic for DMA transfers Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 071/181] mtd: spinand: try a regular dirmap if creating a dirmap for continuous reading fails Greg Kroah-Hartman
` (113 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mikhail Kshevetskiy, Miquel Raynal,
Frieder Schrempf, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
[ Upstream commit e4a0cf9f1d90e6888e5373da3314f761024f6c97 ]
Continuous mode is only supported for data reads, thus writing
requires only single flash page mapping.
Cc: stable@vger.kernel.org
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mtd/nand/spi/core.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 48ac009cbaad2..a480243385e2e 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1036,18 +1036,13 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
unsigned int plane)
{
struct nand_device *nand = spinand_to_nand(spinand);
- struct spi_mem_dirmap_info info = {
- .length = nanddev_page_size(nand) +
- nanddev_per_page_oobsize(nand),
- };
+ struct spi_mem_dirmap_info info = { 0 };
struct spi_mem_dirmap_desc *desc;
- if (spinand->cont_read_possible)
- info.length = nanddev_eraseblock_size(nand);
-
/* The plane number is passed in MSB just above the column address */
info.offset = plane << fls(nand->memorg.pagesize);
+ info.length = nanddev_page_size(nand) + nanddev_per_page_oobsize(nand);
info.op_tmpl = *spinand->op_templates.update_cache;
desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
spinand->spimem, &info);
@@ -1056,6 +1051,8 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
spinand->dirmaps[plane].wdesc = desc;
+ if (spinand->cont_read_possible)
+ info.length = nanddev_eraseblock_size(nand);
info.op_tmpl = *spinand->op_templates.read_cache;
desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
spinand->spimem, &info);
@@ -1071,6 +1068,7 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
return 0;
}
+ info.length = nanddev_page_size(nand) + nanddev_per_page_oobsize(nand);
info.op_tmpl = *spinand->op_templates.update_cache;
info.op_tmpl.data.ecc = true;
desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
@@ -1080,6 +1078,8 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
spinand->dirmaps[plane].wdesc_ecc = desc;
+ if (spinand->cont_read_possible)
+ info.length = nanddev_eraseblock_size(nand);
info.op_tmpl = *spinand->op_templates.read_cache;
info.op_tmpl.data.ecc = true;
desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 071/181] mtd: spinand: try a regular dirmap if creating a dirmap for continuous reading fails
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (69 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 070/181] mtd: spinand: fix direct mapping creation sizes Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 072/181] mtd: spinand: repeat reading in regular mode if " Greg Kroah-Hartman
` (112 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mikhail Kshevetskiy, Miquel Raynal,
Frieder Schrempf, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
[ Upstream commit 004f8ea0d9917398aabff7388b3bf62a84a4088b ]
Continuous reading may result in multiple flash pages reading in one
operation. Typically only one flash page has read/written (a little bit
more than 2-4 Kb), but continuous reading requires the spi controller
to read up to 512 Kb in one operation without toggling CS in beetween.
Roughly speaking spi controllers can be divided on 2 categories:
* spi controllers without dirmap acceleration support
* spi controllers with dirmap acceleration support
Firt of them will have issues with continuous reading if restriction on
the transfer length is implemented in the adjust_op_size() handler.
Second group often supports acceleration of single page only reading.
Thus enabling of continuous reading can break flash reading.
This patch tries to create dirmap for continuous reading first and
fallback to regular reading if spi controller refuses to create it.
Cc: stable@vger.kernel.org
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mtd/nand/spi/core.c | 43 ++++++++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 8 deletions(-)
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index a480243385e2e..10339209e7322 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1032,6 +1032,39 @@ static int spinand_mtd_block_isreserved(struct mtd_info *mtd, loff_t offs)
return ret;
}
+static struct spi_mem_dirmap_desc *spinand_create_rdesc(
+ struct spinand_device *spinand,
+ struct spi_mem_dirmap_info *info)
+{
+ struct nand_device *nand = spinand_to_nand(spinand);
+ struct spi_mem_dirmap_desc *desc = NULL;
+
+ if (spinand->cont_read_possible) {
+ /*
+ * spi controller may return an error if info->length is
+ * too large
+ */
+ info->length = nanddev_eraseblock_size(nand);
+ desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
+ spinand->spimem, info);
+ }
+
+ if (IS_ERR_OR_NULL(desc)) {
+ /*
+ * continuous reading is not supported by flash or
+ * its spi controller, use regular reading
+ */
+ spinand->cont_read_possible = false;
+
+ info->length = nanddev_page_size(nand) +
+ nanddev_per_page_oobsize(nand);
+ desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
+ spinand->spimem, info);
+ }
+
+ return desc;
+}
+
static int spinand_create_dirmap(struct spinand_device *spinand,
unsigned int plane)
{
@@ -1051,11 +1084,8 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
spinand->dirmaps[plane].wdesc = desc;
- if (spinand->cont_read_possible)
- info.length = nanddev_eraseblock_size(nand);
info.op_tmpl = *spinand->op_templates.read_cache;
- desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
- spinand->spimem, &info);
+ desc = spinand_create_rdesc(spinand, &info);
if (IS_ERR(desc))
return PTR_ERR(desc);
@@ -1078,12 +1108,9 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
spinand->dirmaps[plane].wdesc_ecc = desc;
- if (spinand->cont_read_possible)
- info.length = nanddev_eraseblock_size(nand);
info.op_tmpl = *spinand->op_templates.read_cache;
info.op_tmpl.data.ecc = true;
- desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
- spinand->spimem, &info);
+ desc = spinand_create_rdesc(spinand, &info);
if (IS_ERR(desc))
return PTR_ERR(desc);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 072/181] mtd: spinand: repeat reading in regular mode if continuous reading fails
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (70 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 071/181] mtd: spinand: try a regular dirmap if creating a dirmap for continuous reading fails Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 073/181] swapfile: call cond_resched() before locking si->lock Greg Kroah-Hartman
` (111 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mikhail Kshevetskiy, Miquel Raynal,
Frieder Schrempf, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
[ Upstream commit 010dc7f2dd6a0078ade3f88f627ed5fbf45ceb94 ]
Continuous reading may result in multiple flash pages reading in one
operation. Unfortunately, not all spinand controllers support such
large reading. They will read less data. Unfortunately, the operation
can't be continued.
In this case:
* disable continuous reading on this (not good enough) spi controller
* repeat reading in regular mode.
Cc: stable@vger.kernel.org
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mtd/nand/spi/core.c | 25 +++++++++++++++++++++----
1 file changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 10339209e7322..bf16901b77b64 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -427,8 +427,16 @@ static int spinand_read_from_cache_op(struct spinand_device *spinand,
* Dirmap accesses are allowed to toggle the CS.
* Toggling the CS during a continuous read is forbidden.
*/
- if (nbytes && req->continuous)
- return -EIO;
+ if (nbytes && req->continuous) {
+ /*
+ * Spi controller with broken support of continuous
+ * reading was detected. Disable future use of
+ * continuous reading and return -EAGAIN to retry
+ * reading within regular mode.
+ */
+ spinand->cont_read_possible = false;
+ return -EAGAIN;
+ }
}
if (req->datalen)
@@ -849,10 +857,19 @@ static int spinand_mtd_read(struct mtd_info *mtd, loff_t from,
old_stats = mtd->ecc_stats;
- if (spinand_use_cont_read(mtd, from, ops))
+ if (spinand_use_cont_read(mtd, from, ops)) {
ret = spinand_mtd_continuous_page_read(mtd, from, ops, &max_bitflips);
- else
+ if (ret == -EAGAIN && !spinand->cont_read_possible) {
+ /*
+ * Spi controller with broken support of continuous
+ * reading was detected (see spinand_read_from_cache_op()),
+ * repeat reading in regular mode.
+ */
+ ret = spinand_mtd_regular_page_read(mtd, from, ops, &max_bitflips);
+ }
+ } else {
ret = spinand_mtd_regular_page_read(mtd, from, ops, &max_bitflips);
+ }
if (ops->stats) {
ops->stats->uncorrectable_errors +=
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 073/181] swapfile: call cond_resched() before locking si->lock
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (71 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 072/181] mtd: spinand: repeat reading in regular mode if " Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 074/181] Input: evdev - sanitize event type index when fetching event masks Greg Kroah-Hartman
` (110 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Guillaume Morin, Chris Li,
Zijiang Huang, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guillaume Morin <guillaume@morinfr.org>
The 6.12 backport of commit 66366d291f66 ("mm/swap: add cond_resched()
in swap_reclaim_full_clusters to prevent softlockup"),
added a cond_resched() after locking si->lock. Move cond_resched()
before spin_lock().
Signed-off-by: Guillaume Morin <guillaume@morinfr.org>
Fixes: 60cbe67d1342 ("mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup")
Link: https://lore.kernel.org/stable/ansgKOOXi6KE3oKf@bender.morinfr.org/
Cc: stable@vger.kernel.org
Cc: Chris Li <chrisl@kernel.org>
Cc: Zijiang Huang <kerayhuang@tencent.com>
Cc: gregkh@linuxfoundation.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
mm/swapfile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 552df432c37f4..ed0a5ed25e65b 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -770,11 +770,11 @@ static void swap_reclaim_full_clusters(struct swap_info_struct *si, bool force)
}
offset++;
}
+ cond_resched();
spin_lock(&si->lock);
if (to_scan <= 0)
break;
- cond_resched();
}
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 074/181] Input: evdev - sanitize event type index when fetching event masks
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (72 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 073/181] swapfile: call cond_resched() before locking si->lock Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 075/181] ALSA: usb-audio: fix OOB write on Type II inbound URBs Greg Kroah-Hartman
` (109 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Wagenaar, C.C.J. (Chris),
Dmitry Torokhov
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
commit 3abd29c61d2ef37c4102cf755b18be53bb9dbea6 upstream.
The user-supplied event type index passed to EVIOCGMASK / EVIOCSMASK
ioctls is used to index the static counts array in evdev_get_mask_cnt()
and client evmasks array in evdev_get_mask().
While the event type is architecturally bounded by EV_CNT, speculative
execution may mispredict bounds checks and perform out-of-bounds loads.
Sanitize the event type index in evdev_get_mask_cnt() branchlessly using
array_index_mask_nospec(). This clamps the index to 0 for safe array
access and forces the returned count to 0 speculatively when the index
is out of bounds.
We do not need additional array_index_nospec() calls in evdev_get_mask()
because evdev_get_mask_cnt() speculatively forces the count (and
resulting xfer_size) to 0 for out-of-bounds types, preventing any
speculative memory access to client evmasks array.
Reported-by: "Wagenaar, C.C.J. (Chris)" <c.c.j.wagenaar@vu.nl>
Cc: stable@vger.kernel.org
Assisted-by: Antigravity:gemini-3.6-flash
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/anFCAfvxwXB5eJF1@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/input/evdev.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/input/mt.h>
#include <linux/major.h>
+#include <linux/nospec.h>
#include <linux/device.h>
#include <linux/cdev.h>
#include "input-compat.h"
@@ -67,8 +68,10 @@ static size_t evdev_get_mask_cnt(unsigne
[EV_SND] = SND_CNT,
[EV_FF] = FF_CNT,
};
+ unsigned long mask = array_index_mask_nospec(type, EV_CNT);
- return (type < EV_CNT) ? counts[type] : 0;
+ /* Returns 0 for out-of-bounds types, including speculatively */
+ return counts[type & mask] & mask;
}
/* requires the buffer lock to be held */
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 075/181] ALSA: usb-audio: fix OOB write on Type II inbound URBs
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (73 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 074/181] Input: evdev - sanitize event type index when fetching event masks Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 076/181] usb: atm: cxacru: properly kill rcv_urb on error in cxacru_cm() Greg Kroah-Hartman
` (108 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Federico Kirschbaum, Baul Lee,
Takashi Iwai
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baul Lee <baul.lee@xbow.com>
commit 69ee44e1a23be62318189dc4b37fa4ad94053269 upstream.
data_ep_set_params() sizes each URB transfer buffer before it adds the
Format Type II transfer delimiter:
u->packets = urb_packs;
u->buffer_size = maxsize * u->packets;
if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
u->packets++; /* for transfer delimiter */
u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
buffer_size is computed from the pre-increment packet count and never
recomputed, so for a Type II endpoint the buffer is one packet short of
the packet count the URB is built with.
prepare_inbound_urb() then lays out one iso frame per packet and never
consults buffer_size:
offs = 0;
for (i = 0; i < urb_ctx->packets; i++) {
urb->iso_frame_desc[i].offset = offs;
urb->iso_frame_desc[i].length = ep->curpacksize;
offs += ep->curpacksize;
}
urb->transfer_buffer_length = offs;
urb->number_of_packets = urb_ctx->packets;
The last descriptor therefore points one packet past the end of the
transfer buffer, where the host controller writes device data on every
inbound transfer. prepare_silent_urb() and prepare_playback_urb() bound
their fill loops by ctx->buffer_size, so only capture is affected.
fmt_type comes from the device's audio streaming descriptors, so any
device advertising a Type II capture format hits this once userspace sets
hw_params on the stream.
KASAN on 7.2.0-rc5 (arm64) with a dummy_hcd/raw-gadget device, one report
per inbound transfer:
BUG: KASAN: slab-out-of-bounds in dummy_timer
Write of size 64 at addr ffff0000186171c0 by task cons02/166
__asan_memcpy
dummy_timer
hrtimer_run_softirq
Allocated by task 166:
usb_alloc_coherent
snd_usb_endpoint_set_params
The buggy address is located 0 bytes to the right of
allocated 64-byte region [ffff000018617180, ffff0000186171c0)
Compute buffer_size after the delimiter packet has been accounted for,
and bound the fill loop by buffer_size, as prepare_silent_urb() already
does on the outbound side. This grows every Type II URB allocation by
one maxsize packet.
Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
Fixes: 8fdff6a319e7 ("ALSA: snd-usb: implement new endpoint streaming model")
Reported-by: Federico Kirschbaum <federico.kirschbaum@xbow.com>
Reported-by: Baul Lee <baul.lee@xbow.com>
Cc: stable@vger.kernel.org
Signed-off-by: Baul Lee <baul.lee@xbow.com>
Link: https://patch.msgid.link/20260805013441.38245-1-baul.lee@xbow.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/endpoint.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -388,13 +388,15 @@ static int prepare_inbound_urb(struct sn
case SND_USB_ENDPOINT_TYPE_DATA:
offs = 0;
for (i = 0; i < urb_ctx->packets; i++) {
+ if (offs + ep->curpacksize > urb_ctx->buffer_size)
+ break;
urb->iso_frame_desc[i].offset = offs;
urb->iso_frame_desc[i].length = ep->curpacksize;
offs += ep->curpacksize;
}
urb->transfer_buffer_length = offs;
- urb->number_of_packets = urb_ctx->packets;
+ urb->number_of_packets = i;
break;
case SND_USB_ENDPOINT_TYPE_SYNC:
@@ -1263,10 +1265,10 @@ static int data_ep_set_params(struct snd
u->index = i;
u->ep = ep;
u->packets = urb_packs;
- u->buffer_size = maxsize * u->packets;
if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
u->packets++; /* for transfer delimiter */
+ u->buffer_size = maxsize * u->packets;
u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
if (!u->urb)
goto out_of_memory;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 076/181] usb: atm: cxacru: properly kill rcv_urb on error in cxacru_cm()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (74 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 075/181] ALSA: usb-audio: fix OOB write on Type II inbound URBs Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 077/181] thunderbolt: icm: Preserve USB4 proxy data-valid bit Greg Kroah-Hartman
` (107 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, syzbot+c9dff578c3a41775176a,
Aleksandr Nogikh
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aleksandr Nogikh <nogikh@google.com>
commit c2f811314be351d86b6ab41e9297ae80d8da6f86 upstream.
If cxacru_cm() encounters an error while submitting or waiting for snd_urb,
it aborts and returns the error without killing the already submitted
rcv_urb. This leaves the rcv_urb active.
When this happens during initialization (e.g., in cxacru_atm_start()), the
driver may ignore the error and proceed to call cxacru_poll_status(), which
invokes cxacru_cm() again. Attempting to submit the still-active rcv_urb
triggers a warning in usb_submit_urb():
cxacru 1-1:1.0: send of cm 0x84 failed (-104)
ATM dev 0: cxacru_atm_start: CHIP_ADSL_LINE_START returned -104
------------[ cut here ]------------
URB ffff88812658d200 submitted while active
WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x79/0x18b0
drivers/usb/core/urb.c:379
...
Call Trace:
<TASK>
cxacru_cm+0x21a/0xf10 drivers/usb/atm/cxacru.c:631
cxacru_cm_get_array drivers/usb/atm/cxacru.c:722 [inline]
cxacru_poll_status+0x178/0x1110 drivers/usb/atm/cxacru.c:828
cxacru_atm_start+0x185/0x360 drivers/usb/atm/cxacru.c:814
usbatm_atm_init+0x144/0x3a0 drivers/usb/atm/usbatm.c:927
usbatm_usb_probe+0x15cb/0x1db0 drivers/usb/atm/usbatm.c:1178
cxacru_usb_probe+0x17f/0x220 drivers/usb/atm/cxacru.c:1370
...
To fix this, ensure that rcv_urb is properly killed if cxacru_cm() aborts
early. We can safely call usb_kill_urb() on rcv_urb in the error path, as
it is safe to call even if the URB is not active (e.g., if it failed to
submit in the first place, or if it already completed).
Fixes: 1b0e61465234 ("[PATCH] USB ATM: driver for the Conexant AccessRunner chipset cxacru")
Cc: stable <stable@kernel.org>
Assisted-by: Gemini:gemini-3.5-flash Gemini:gemini-3.1-pro-preview syzbot
Reported-by: syzbot+c9dff578c3a41775176a@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=c9dff578c3a41775176a
Link: https://syzkaller.appspot.com/ai_job?id=75fec6f2-c8a6-43b1-b184-4d26baba86cc
Signed-off-by: Aleksandr Nogikh <nogikh@google.com>
Link: https://patch.msgid.link/91edfa4c-a63d-400c-9f00-31f3e1f98c00@mail.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/atm/cxacru.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -700,6 +700,8 @@ static int cxacru_cm(struct cxacru_data
ret = offd;
usb_dbg(instance->usbatm, "cm %#x\n", cm);
fail:
+ if (ret < 0)
+ usb_kill_urb(instance->rcv_urb);
mutex_unlock(&instance->cm_serialize);
err:
return ret;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 077/181] thunderbolt: icm: Preserve USB4 proxy data-valid bit
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (75 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 076/181] usb: atm: cxacru: properly kill rcv_urb on error in cxacru_cm() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 078/181] usb: cdnsp: fix incorrect endian conversions for APB timeout register Greg Kroah-Hartman
` (106 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Xu Rao, Mika Westerberg
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xu Rao <raoxu@uniontech.com>
commit e48844ece5e3ed1d1eb865f6da2b16f62cd9f86d upstream.
The ICM USB4 switch operation request encodes two values in
request.data_len_valid: bit 4 marks the data payload valid, while bits
3:0 hold the payload length in dwords. A zero length with the valid bit
set represents the full 16-dword data array.
icm_usb4_switch_op() sets the valid bit when a transmit payload is
present. For payloads shorter than the full 16 dwords, it then assigns
the length to the whole field and clears the valid bit that was just set.
The payload is still copied into the request, but the descriptor sent to
firmware marks that data as invalid.
This affects USB4 router operations that send short payloads through the
firmware connection manager. In particular, USB4 NVM writes can send a
short final block when the image size is not aligned to the 64-byte proxy
payload size. Firmware may then ignore or reject that final block, while
full 16-dword blocks are unaffected because they are encoded as length 0
with the valid bit set.
OR the short payload length into data_len_valid so the valid bit is
preserved.
Fixes: 9039387e166e ("thunderbolt: Add USB4 router operation proxy for firmware connection manager")
Cc: stable@vger.kernel.org
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/thunderbolt/icm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -2291,7 +2291,7 @@ static int icm_usb4_switch_op(struct tb_
if (tx_data_len) {
request.data_len_valid |= ICM_USB4_SWITCH_DATA_VALID;
if (tx_data_len < ARRAY_SIZE(request.data))
- request.data_len_valid =
+ request.data_len_valid |=
tx_data_len & ICM_USB4_SWITCH_DATA_LEN_MASK;
memcpy(request.data, tx_data, tx_data_len * sizeof(u32));
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 078/181] usb: cdnsp: fix incorrect endian conversions for APB timeout register
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (76 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 077/181] thunderbolt: icm: Preserve USB4 proxy data-valid bit Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 079/181] usb: gadget: f_ncm: Use unsigned int for ndp_index Greg Kroah-Hartman
` (105 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Arnd Bergmann, stable,
Pawel Laszczak
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pawel Laszczak <pawell@cadence.com>
commit 50b303f3d0f7de543ee90d50879970783d06da33 upstream.
readl() already returns a CPU-endian value. Passing its return value to
le32_to_cpu() is therefore redundant and causes an incorrect double byte
swap on big-endian systems.
Similarly, writel() expects a CPU-endian value, so passing the result of
cpu_to_le32() is incorrect.
Remove the unnecessary conversions and operate on the MMIO register value
as a CPU-endian u32.
Fixes: 241e2ce88e5a ("usb: cdnsp: Fix issue with resuming from L1")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260720-endian-fix-v1-v1-1-b5681fa1ea9f@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/cdns3/cdnsp-gadget.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/cdns3/cdnsp-gadget.c
+++ b/drivers/usb/cdns3/cdnsp-gadget.c
@@ -154,9 +154,9 @@ static void cdnsp_set_apb_timeout_value(
offset = cdnsp_find_next_ext_cap(base, offset, D_XEC_PRE_REGS_CAP);
reg = base + offset + REG_CHICKEN_BITS_3_OFFSET;
- val = le32_to_cpu(readl(reg));
+ val = readl(reg);
val = CHICKEN_APB_TIMEOUT_SET(val, cdns->override_apb_timeout);
- writel(cpu_to_le32(val), reg);
+ writel(val, reg);
}
static void cdnsp_set_chicken_bits_2(struct cdnsp_device *pdev, u32 bit)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 079/181] usb: gadget: f_ncm: Use unsigned int for ndp_index
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (77 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 078/181] usb: cdnsp: fix incorrect endian conversions for APB timeout register Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 080/181] net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup() Greg Kroah-Hartman
` (104 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, stable, Sonali Pradhan
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sonali Pradhan <sonalipradhan@google.com>
commit 6b1c8a9403a26cb0fed7a648916c74dc236da591 upstream.
The variable ndp_index is declared as a signed integer, but it stores
the return value of get_ncm(), which is unsigned.
A malicious host can supply a large offset that overflows the signed
ndp_index, making it negative. Because ndp_index is compared against
unsigned bounds, this negative value bypasses sanity checks and leads
to an out-of-bounds read when calculating the address of the NDP
block (ntb_ptr + ndp_index).
Fix this by changing ndp_index to unsigned int to ensure consistent
unsigned comparisons throughout the function.
Fixes: 370af734dfaf ("usb: gadget: NCM: RX function support multiple NDPs")
Cc: stable <stable@kernel.org>
Signed-off-by: Sonali Pradhan <sonalipradhan@google.com>
Link: https://patch.msgid.link/20260720165654.2224591-1-sonalipradhan@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/gadget/function/f_ncm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -1171,7 +1171,7 @@ static int ncm_unwrap_ntb(struct gether
unsigned char *ntb_ptr = skb->data;
__le16 *tmp;
unsigned index, index2;
- int ndp_index;
+ unsigned int ndp_index;
unsigned dg_len, dg_len2;
unsigned ndp_len;
unsigned block_len;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 080/181] net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (78 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 079/181] usb: gadget: f_ncm: Use unsigned int for ndp_index Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 081/181] net: usb: ipheth: fix carrier_work UAF on disconnect Greg Kroah-Hartman
` (103 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Yi Cong, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yi Cong <yicong@kylinos.cn>
commit 1f428e30947395d9b9aacee03e25a4e6cfcad7a4 upstream.
When the interface has NETIF_F_SG enabled and skb_linearize() fails in
ax88179_tx_fixup(), the function returns NULL without freeing the skb.
usbnet_start_xmit() treats a NULL return from tx_fixup() as a drop
(info->flags does not set FLAG_MULTI_PACKET for this driver), jumping
to the "drop" label where it does `if (skb) dev_kfree_skb_any(skb)`.
Because tx_fixup() returned NULL, the local skb variable in
usbnet_start_xmit() is NULL, so the original skb is never freed — a
memory leak on every TX frame whose linearization fails (i.e. under
memory pressure).
Free the skb before returning, matching the error handling already used
for the pskb_expand_head() failure path in the same function.
Fixes: 16b1c4e01c89 ("net: usb: ax88179_178a: add TSO feature")
Cc: stable@vger.kernel.org
Signed-off-by: Yi Cong <yicong@kylinos.cn>
Link: https://patch.msgid.link/20260729030436.3420477-1-cong.yi@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/usb/ax88179_178a.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/net/usb/ax88179_178a.c
+++ b/drivers/net/usb/ax88179_178a.c
@@ -1493,8 +1493,10 @@ ax88179_tx_fixup(struct usbnet *dev, str
headroom = skb_headroom(skb) - 8;
- if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb))
+ if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb)) {
+ dev_kfree_skb_any(skb);
return NULL;
+ }
if ((skb_header_cloned(skb) || headroom < 0) &&
pskb_expand_head(skb, headroom < 0 ? 8 : 0, 0, GFP_ATOMIC)) {
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 081/181] net: usb: ipheth: fix carrier_work UAF on disconnect
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (79 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 080/181] net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 082/181] vt: add permission check for KDSKBMETA ioctl Greg Kroah-Hartman
` (102 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Doruk Tan Ozturk, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Doruk Tan Ozturk <doruk@0sec.ai>
commit fde39b8a521780391fb4e5bda2c0aa4928947f12 upstream.
ipheth_sndbulk_callback() re-arms the carrier-check work on any
non-zero URB status:
else
schedule_delayed_work(&dev->carrier_work, 0);
Nothing ties that to the interface being up, so the work can be armed
again after ipheth_close() has already drained it, and stay armed
until the netdev whose private area embeds it is freed.
On unplug with a TX URB in flight, ipheth_disconnect() drains the work
through unregister_netdev() -> ipheth_close() ->
cancel_delayed_work_sync() and only then calls ipheth_kill_urbs().
usb_kill_urb() completes the in-flight TX URB with -ENOENT, so
ipheth_sndbulk_callback() runs after the drain and re-arms
carrier_work.
The same completion also re-arms the work if the interface is only
brought down while a TX URB is in flight, and
ipheth_carrier_check_work() then keeps re-queueing itself once a
second. unregister_netdev() does not call ipheth_close() for an
already-down interface, so nothing drains it on the later unplug
either.
In both cases free_netdev() frees the netdev while carrier_work is
still pending, and ipheth_carrier_check_work() dereferences freed
memory.
Tie the work to the interface state instead of chasing the completion:
disable it in ipheth_close() and enable it in ipheth_open(), so a
schedule_delayed_work() from the URB completion is a no-op whenever
the interface is not up. disable_delayed_work_sync() also waits for a
running instance, so it fully replaces the cancel_delayed_work_sync()
it takes the place of. The work starts out disabled in ipheth_probe()
so the enable/disable counts balance from the first open.
Reproduced under KASAN on linux-next (next-20260731) with dummy_hcd and
raw-gadget standing in for the device, driving the second path above (the
interface is already down, so unregister_netdev() does not call
ipheth_close()): 15 of 15 unpatched boots report a slab-use-after-free in
__run_timers(), freed by ipheth_disconnect() and re-armed from
ipheth_sndbulk_callback() via queue_delayed_work_on(). The
same trigger on a kernel differing only by this patch reports 0 of 15,
and the carrier check still functions across open/close cycles.
The reproducer needs an attached USB device that stops draining bulk OUT,
plus a link down and unplug, driven as root. It is not a privilege
boundary crossing and no exploit primitive was developed.
Found by 0sec (https://0sec.ai).
Fixes: bb1b40c7cb86 ("usbnet: ipheth: prevent TX queue timeouts when device not ready")
Cc: stable@vger.kernel.org
Signed-off-by: Doruk Tan Ozturk <doruk@0sec.ai>
Link: https://patch.msgid.link/20260802120602.42595-1-doruk@0sec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/usb/ipheth.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
--- a/drivers/net/usb/ipheth.c
+++ b/drivers/net/usb/ipheth.c
@@ -490,6 +490,7 @@ static int ipheth_open(struct net_device
if (retval)
return retval;
+ enable_delayed_work(&dev->carrier_work);
schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT);
return retval;
}
@@ -499,7 +500,11 @@ static int ipheth_close(struct net_devic
struct ipheth_device *dev = netdev_priv(net);
netif_stop_queue(net);
- cancel_delayed_work_sync(&dev->carrier_work);
+ /* A TX URB can still complete with an error after this point and
+ * try to re-arm the carrier work. Disable it instead of cancelling
+ * it, so that such a schedule_delayed_work() is a no-op.
+ */
+ disable_delayed_work_sync(&dev->carrier_work);
return 0;
}
@@ -633,6 +638,10 @@ static int ipheth_probe(struct usb_inter
}
INIT_DELAYED_WORK(&dev->carrier_work, ipheth_carrier_check_work);
+ /* Armed only between ipheth_open() and ipheth_close(). Start out
+ * disabled so the enable/disable counts balance from the first open.
+ */
+ disable_delayed_work(&dev->carrier_work);
retval = ipheth_alloc_urbs(dev);
if (retval) {
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 082/181] vt: add permission check for KDSKBMETA ioctl
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (80 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 081/181] net: usb: ipheth: fix carrier_work UAF on disconnect Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 083/181] vt: stabilize tty reference in kbd_keycode with tty_port_tty_get Greg Kroah-Hartman
` (101 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, stable, Joshua Rogers
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joshua Rogers <linux@joshua.hu>
commit a7ad0034453ba4c353f9b8f810ee2569de33d283 upstream.
KDSKBMETA modifies keyboard meta mode but lacks the !perm check that all
other keyboard setter ioctls in vt_k_ioctl() enforce, allowing a process
to change meta mode on a non-controlling console without authorization.
Assisted-by: AISLE:Snapshot
Cc: stable <stable@kernel.org>
Signed-off-by: Joshua Rogers <linux@joshua.hu>
Link: https://patch.msgid.link/20260731-tty-vt-stuff-v1-2-be99b9da8e30@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/vt/vt_ioctl.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -408,6 +408,8 @@ static int vt_k_ioctl(struct tty_struct
/* this could be folded into KDSKBMODE, but for compatibility
reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */
case KDSKBMETA:
+ if (!perm)
+ return -EPERM;
return vt_do_kdskbmeta(console, arg);
case KDGKBMETA:
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 083/181] vt: stabilize tty reference in kbd_keycode with tty_port_tty_get
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (81 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 082/181] vt: add permission check for KDSKBMETA ioctl Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 084/181] Input: evdev - fix information leak in evdev_pass_values() Greg Kroah-Hartman
` (100 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Joshua Rogers, stable
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joshua Rogers <linux@joshua.hu>
commit e25d47a526939ad44b75f778b8a7500562b84fc1 upstream.
kbd_keycode() reads vc->port.tty without acquiring a tty reference,
racing against con_shutdown() which clears port.tty under a different
lock. Use tty_port_tty_get()/tty_kref_put() to hold a proper reference
for the duration the tty pointer is needed.
Assisted-by: AISLE:Snapshot
Signed-off-by: Joshua Rogers <linux@joshua.hu>
Cc: stable <stable@kernel.org>
Link: https://patch.msgid.link/20260731-tty-vt-stuff-v1-1-be99b9da8e30@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/vt/keyboard.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -1403,7 +1403,7 @@ static void kbd_keycode(unsigned int key
struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
int rc;
- tty = vc->port.tty;
+ tty = tty_port_tty_get(&vc->port);
if (tty && (!tty->driver_data)) {
/* No driver data? Strange. Okay we fix it then. */
@@ -1463,9 +1463,12 @@ static void kbd_keycode(unsigned int key
* characters get aren't echoed locally. This makes key repeat
* usable with slow applications and under heavy loads.
*/
+ tty_kref_put(tty);
return;
}
+ tty_kref_put(tty);
+
param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
param.ledstate = kbd->ledflagstate;
key_map = key_maps[shift_final];
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 084/181] Input: evdev - fix information leak in evdev_pass_values()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (82 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 083/181] vt: stabilize tty reference in kbd_keycode with tty_port_tty_get Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:32 ` [PATCH 6.12 085/181] ima: fix out-of-bounds read in xattr_verify() Greg Kroah-Hartman
` (99 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, sashiko-bot, Dmitry Torokhov
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
commit 90f305f2c7a30257c683e13f4bf7c798eea992a0 upstream.
In evdev_pass_values(), the input_event structure is allocated on the
kernel stack and populated field-by-field. However, it is never fully
initialized. On architectures where struct input_event contains explicit
or implicit padding (such as the 32-bit __pad field on SPARC64), these
padding bytes are left uninitialized.
When this event structure is subsequently passed to the client buffer
and later copied to userspace, the uninitialized padding bytes leak
kernel stack memory, potentially exposing sensitive information.
Similar issues exist in __evdev_queue_syn_dropped and __pass_event.
Fix this by explicitly zeroing the entire event structure with memset()
before populating its fields. This ensures all padding bytes are cleared
before the data crosses the security boundary.
Reported-by: sashiko-bot@kernel.org
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/ampGGKo4UMKru6f5@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/input/evdev.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -149,11 +149,11 @@ static void __evdev_queue_syn_dropped(st
struct timespec64 ts = ktime_to_timespec64(ev_time[client->clk_type]);
struct input_event ev;
+ memset(&ev, 0, sizeof(ev));
ev.input_event_sec = ts.tv_sec;
ev.input_event_usec = ts.tv_nsec / NSEC_PER_USEC;
ev.type = EV_SYN;
ev.code = SYN_DROPPED;
- ev.value = 0;
client->buffer[client->head++] = ev;
client->head &= client->bufsize - 1;
@@ -221,20 +221,20 @@ static void __pass_event(struct evdev_cl
client->head &= client->bufsize - 1;
if (unlikely(client->head == client->tail)) {
+ struct input_event ev;
+
+ memset(&ev, 0, sizeof(ev));
+ ev.input_event_sec = event->input_event_sec;
+ ev.input_event_usec = event->input_event_usec;
+ ev.type = EV_SYN;
+ ev.code = SYN_DROPPED;
+
/*
* This effectively "drops" all unconsumed events, leaving
* EV_SYN/SYN_DROPPED plus the newest event in the queue.
*/
client->tail = (client->head - 2) & (client->bufsize - 1);
-
- client->buffer[client->tail] = (struct input_event) {
- .input_event_sec = event->input_event_sec,
- .input_event_usec = event->input_event_usec,
- .type = EV_SYN,
- .code = SYN_DROPPED,
- .value = 0,
- };
-
+ client->buffer[client->tail] = ev;
client->packet_head = client->tail;
}
@@ -256,6 +256,8 @@ static void evdev_pass_values(struct evd
if (client->revoked)
return;
+ memset(&event, 0, sizeof(event));
+
ts = ktime_to_timespec64(ev_time[client->clk_type]);
event.input_event_sec = ts.tv_sec;
event.input_event_usec = ts.tv_nsec / NSEC_PER_USEC;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 085/181] ima: fix out-of-bounds read in xattr_verify()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (83 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 084/181] Input: evdev - fix information leak in evdev_pass_values() Greg Kroah-Hartman
@ 2026-08-17 13:32 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 086/181] ipvs: stop estimator after disabled calc phase Greg Kroah-Hartman
` (98 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:32 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Lincoln Wallace, Mimi Zohar
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lincoln Wallace <locnnil0@gmail.com>
commit 5ff232d31106f45ac87c3b64e1d35a0667777797 upstream.
The digest-length check in xattr_verify() mixes int and size_t:
if (xattr_len - sizeof(xattr_value->type) - hash_start >=
iint->ima_hash->length)
sizeof() yields size_t, so the usual arithmetic conversions promote
the whole left-hand side to unsigned 64-bit before the subtraction
runs. For a truncated xattr this underflows instead of going negative:
a 1-byte IMA_XATTR_DIGEST_NG xattr (xattr_len == 1, hash_start == 1)
turns "1 - 1 - 1" into SIZE_MAX, which is trivially >= ima_hash->length.
The check then passes and the following memcmp() reads
iint->ima_hash->length bytes starting past the end of the buffer
vfs_getxattr_alloc() allocated for it.
Nothing upstream clamps xattr_len back into a safe range first:
ima_get_hash_algo() only special-cases xattr_len < 2 to pick a default
algorithm, and evm_verifyxattr() returns INTEGRITY_UNKNOWN rather than
failing when no HMAC key is loaded, so a truncated security.ima value
reaches the length check as-is.
Rewrite the comparison so every operand stays a signed int and no
implicit conversion to size_t can occur.
Fixes: 3ea7a56067e6 ("ima: provide hash algo info in the xattr")
Cc: stable@vger.kernel.org
Signed-off-by: Lincoln Wallace <locnnil0@gmail.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
security/integrity/ima/ima_appraise.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -302,8 +302,13 @@ static int xattr_verify(enum ima_hooks f
} else {
set_bit(IMA_DIGSIG, &iint->atomic_flags);
}
- if (xattr_len - sizeof(xattr_value->type) - hash_start >=
- iint->ima_hash->length)
+ /*
+ * Use addition, not subtraction: sizeof() forces unsigned
+ * math and a short xattr_len would wrap around, bypassing
+ * this bounds check.
+ */
+ if (xattr_len >= (int)sizeof(xattr_value->type) + hash_start +
+ (int)iint->ima_hash->length)
/*
* xattr length may be longer. md5 hash in previous
* version occupied 20 bytes in xattr, instead of 16
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 086/181] ipvs: stop estimator after disabled calc phase
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (84 preceding siblings ...)
2026-08-17 13:32 ` [PATCH 6.12 085/181] ima: fix out-of-bounds read in xattr_verify() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 087/181] ipvs: add totalconns for dest Greg Kroah-Hartman
` (97 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zhiling Zou, Julian Anastasov,
Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhiling Zou <zhilinz@nebusec.ai>
commit 558f67f1340f803a346ecd14a69c49653111c5f4 upstream.
IPVS estimator kthread 0 starts with zeroed chain and tick limits until
its initial calculation phase completes. If network namespace teardown
clears ipvs->enable during that phase, ip_vs_est_calc_phase() can return
without installing positive limits.
The kthread can then continue into its main loop and drain
est_temp_list with zero chain_max, tick_max and est_max_count values.
Each enqueue consumes one available tick row, but est_count never
reaches the zero est_max_count value. After all rows are consumed, the
row lookup returns IPVS_EST_NTICKS and ip_vs_enqueue_estimator() writes
past the ticks and tick_len arrays.
Exit kthread 0 after the calculation phase if the kthread is stopping or
IPVS has been disabled. That keeps temporary estimators from being
drained after the limits failed to initialize.
Estimator kthreads can now self-exit before teardown or reload stops
kd->task. Keep an extra task reference after creation and release it
with kthread_stop_put(), so kd->task remains valid until the stop paths
consume that reference.
Fixes: 705dd3444081 ("ipvs: use kthreads for stats estimation")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/ipvs/ip_vs_est.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/net/netfilter/ipvs/ip_vs_est.c
+++ b/net/netfilter/ipvs/ip_vs_est.c
@@ -187,8 +187,11 @@ static int ip_vs_estimation_kthread(void
}
/* kthread 0 will handle the calc phase */
- if (ipvs->est_calc_phase)
+ if (ipvs->est_calc_phase) {
ip_vs_est_calc_phase(ipvs);
+ if (kthread_should_stop() || !READ_ONCE(ipvs->enable))
+ return 0;
+ }
}
while (1) {
@@ -263,6 +266,7 @@ int ip_vs_est_kthread_start(struct netns
kd->task = NULL;
goto out;
}
+ get_task_struct(kd->task);
set_user_nice(kd->task, sysctl_est_nice(ipvs));
set_cpus_allowed_ptr(kd->task, sysctl_est_cpulist(ipvs));
@@ -278,7 +282,7 @@ void ip_vs_est_kthread_stop(struct ip_vs
{
if (kd->task) {
pr_info("stopping estimator thread %d...\n", kd->id);
- kthread_stop(kd->task);
+ kthread_stop_put(kd->task);
kd->task = NULL;
}
}
@@ -510,7 +514,7 @@ static void ip_vs_est_kthread_destroy(st
if (kd) {
if (kd->task) {
pr_info("stop unused estimator thread %d...\n", kd->id);
- kthread_stop(kd->task);
+ kthread_stop_put(kd->task);
}
ip_vs_stats_free(kd->calc_stats);
kfree(kd);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 087/181] ipvs: add totalconns for dest
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (85 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 086/181] ipvs: stop estimator after disabled calc phase Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 088/181] ipvs: properly update the overload flag on dest edit Greg Kroah-Hartman
` (96 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Julian Anastasov, Yizhou Zhao,
Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Julian Anastasov <ja@ssi.bg>
commit 04d2feaed8d0103c498727191ba04001d5100e67 upstream.
Replace the inactconns dest counter with totalconns, now
inactconns can be obtained from totalconns - activeconns.
This reduces the atomic inc/dec ops for TCP/SCTP from
6 to 4 if the connection is established and then closed.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/ip_vs.h | 17 ++++++++++++-----
net/netfilter/ipvs/ip_vs_conn.c | 24 +++++++-----------------
net/netfilter/ipvs/ip_vs_ctl.c | 10 +++++-----
net/netfilter/ipvs/ip_vs_lc.c | 4 ++--
net/netfilter/ipvs/ip_vs_proto_sctp.c | 2 --
net/netfilter/ipvs/ip_vs_proto_tcp.c | 2 --
net/netfilter/ipvs/ip_vs_sync.c | 7 ++-----
7 files changed, 28 insertions(+), 38 deletions(-)
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -736,7 +736,7 @@ struct ip_vs_dest {
/* connection counters and thresholds */
atomic_t activeconns; /* active connections */
- atomic_t inactconns; /* inactive connections */
+ atomic_t totalconns; /* total connections */
atomic_t persistconns; /* persistent connections */
__u32 u_threshold; /* upper threshold */
__u32 l_threshold; /* lower threshold */
@@ -1865,14 +1865,21 @@ void ip_vs_unregister_hooks(struct netns
static inline int
ip_vs_dest_conn_overhead(struct ip_vs_dest *dest)
{
- /* We think the overhead of processing active connections is 256
+ /* We think the overhead of processing active connections is 257
* times higher than that of inactive connections in average. (This
- * 256 times might not be accurate, we will change it later) We
+ * 257 times might not be accurate, we will change it later) We
* use the following formula to estimate the overhead now:
- * dest->activeconns*256 + dest->inactconns
+ * dest->activeconns*256 + dest->totalconns
*/
return (atomic_read(&dest->activeconns) << 8) +
- atomic_read(&dest->inactconns);
+ atomic_read(&dest->totalconns);
+}
+
+static inline int
+ip_vs_dest_inactconns(const struct ip_vs_dest *dest)
+{
+ return max(atomic_read(&dest->totalconns) -
+ atomic_read(&dest->activeconns), 0);
}
#ifdef CONFIG_IP_VS_PROTO_TCP
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -570,12 +570,6 @@ static inline void ip_vs_bind_xmit_v6(st
#endif
-static inline int ip_vs_dest_totalconns(struct ip_vs_dest *dest)
-{
- return atomic_read(&dest->activeconns)
- + atomic_read(&dest->inactconns);
-}
-
/*
* Bind a connection entry with a virtual service destination
* Called just after a new connection entry is created.
@@ -633,8 +627,7 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, s
*/
if (!(flags & IP_VS_CONN_F_INACTIVE))
atomic_inc(&dest->activeconns);
- else
- atomic_inc(&dest->inactconns);
+ atomic_inc(&dest->totalconns);
} else {
/* It is a persistent connection/template, so increase
the persistent connection counter */
@@ -642,7 +635,7 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, s
}
if (dest->u_threshold != 0 &&
- ip_vs_dest_totalconns(dest) >= dest->u_threshold)
+ atomic_read(&dest->totalconns) >= dest->u_threshold)
dest->flags |= IP_VS_DEST_F_OVERLOAD;
}
@@ -724,13 +717,10 @@ static inline void ip_vs_unbind_dest(str
/* Update the connection counters */
if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
- /* It is a normal connection, so decrease the inactconns
- or activeconns counter */
- if (cp->flags & IP_VS_CONN_F_INACTIVE) {
- atomic_dec(&dest->inactconns);
- } else {
+ /* It is a normal connection, so decrease the counters */
+ if (!(cp->flags & IP_VS_CONN_F_INACTIVE))
atomic_dec(&dest->activeconns);
- }
+ atomic_dec(&dest->totalconns);
} else {
/* It is a persistent connection/template, so decrease
the persistent connection counter */
@@ -738,10 +728,10 @@ static inline void ip_vs_unbind_dest(str
}
if (dest->l_threshold != 0) {
- if (ip_vs_dest_totalconns(dest) < dest->l_threshold)
+ if (atomic_read(&dest->totalconns) < dest->l_threshold)
dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
} else if (dest->u_threshold != 0) {
- if (ip_vs_dest_totalconns(dest) * 4 < dest->u_threshold * 3)
+ if (atomic_read(&dest->totalconns) * 4 < dest->u_threshold * 3)
dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
} else {
if (dest->flags & IP_VS_DEST_F_OVERLOAD)
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1101,7 +1101,7 @@ ip_vs_new_dest(struct ip_vs_service *svc
dest->port = udest->port;
atomic_set(&dest->activeconns, 0);
- atomic_set(&dest->inactconns, 0);
+ atomic_set(&dest->totalconns, 0);
atomic_set(&dest->persistconns, 0);
refcount_set(&dest->refcnt, 1);
@@ -2456,7 +2456,7 @@ static int ip_vs_info_seq_show(struct se
ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
atomic_read(&dest->weight),
atomic_read(&dest->activeconns),
- atomic_read(&dest->inactconns));
+ ip_vs_dest_inactconns(dest));
else
#endif
seq_printf(seq,
@@ -2467,7 +2467,7 @@ static int ip_vs_info_seq_show(struct se
ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
atomic_read(&dest->weight),
atomic_read(&dest->activeconns),
- atomic_read(&dest->inactconns));
+ ip_vs_dest_inactconns(dest));
}
}
@@ -2953,7 +2953,7 @@ __ip_vs_get_dest_entries(struct netns_ip
entry.u_threshold = dest->u_threshold;
entry.l_threshold = dest->l_threshold;
entry.activeconns = atomic_read(&dest->activeconns);
- entry.inactconns = atomic_read(&dest->inactconns);
+ entry.inactconns = ip_vs_dest_inactconns(dest);
entry.persistconns = atomic_read(&dest->persistconns);
ip_vs_copy_stats(&kstats, &dest->stats);
ip_vs_export_stats_user(&entry.stats, &kstats);
@@ -3557,7 +3557,7 @@ static int ip_vs_genl_fill_dest(struct s
nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
atomic_read(&dest->activeconns)) ||
nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
- atomic_read(&dest->inactconns)) ||
+ ip_vs_dest_inactconns(dest)) ||
nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
atomic_read(&dest->persistconns)) ||
nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
--- a/net/netfilter/ipvs/ip_vs_lc.c
+++ b/net/netfilter/ipvs/ip_vs_lc.c
@@ -31,7 +31,7 @@ ip_vs_lc_schedule(struct ip_vs_service *
/*
* Simply select the server with the least number of
- * (activeconns<<5) + inactconns
+ * (activeconns*256) + totalconns
* Except whose weight is equal to zero.
* If the weight is equal to zero, it means that the server is
* quiesced, the existing connections to the server still get
@@ -57,7 +57,7 @@ ip_vs_lc_schedule(struct ip_vs_service *
IP_VS_DBG_ADDR(least->af, &least->addr),
ntohs(least->port),
atomic_read(&least->activeconns),
- atomic_read(&least->inactconns));
+ ip_vs_dest_inactconns(least));
return least;
}
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -446,12 +446,10 @@ set_sctp_state(struct ip_vs_proto_data *
if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
(next_state != IP_VS_SCTP_S_ESTABLISHED)) {
atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
cp->flags |= IP_VS_CONN_F_INACTIVE;
} else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
(next_state == IP_VS_SCTP_S_ESTABLISHED)) {
atomic_inc(&dest->activeconns);
- atomic_dec(&dest->inactconns);
cp->flags &= ~IP_VS_CONN_F_INACTIVE;
}
}
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -527,12 +527,10 @@ set_tcp_state(struct ip_vs_proto_data *p
if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
!tcp_state_active(new_state)) {
atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
cp->flags |= IP_VS_CONN_F_INACTIVE;
} else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
tcp_state_active(new_state)) {
atomic_inc(&dest->activeconns);
- atomic_dec(&dest->inactconns);
cp->flags &= ~IP_VS_CONN_F_INACTIVE;
}
}
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -879,13 +879,10 @@ static void ip_vs_proc_conn(struct netns
spin_lock_bh(&cp->lock);
if ((cp->flags ^ flags) & IP_VS_CONN_F_INACTIVE &&
!(flags & IP_VS_CONN_F_TEMPLATE) && dest) {
- if (flags & IP_VS_CONN_F_INACTIVE) {
+ if (flags & IP_VS_CONN_F_INACTIVE)
atomic_dec(&dest->activeconns);
- atomic_inc(&dest->inactconns);
- } else {
+ else
atomic_inc(&dest->activeconns);
- atomic_dec(&dest->inactconns);
- }
}
flags &= IP_VS_CONN_F_BACKUP_UPD_MASK;
flags |= cp->flags & ~IP_VS_CONN_F_BACKUP_UPD_MASK;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 088/181] ipvs: properly update the overload flag on dest edit
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (86 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 087/181] ipvs: add totalconns for dest Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 089/181] ipvs: clear IPv4 options after rebasing tunnel ICMP errors Greg Kroah-Hartman
` (95 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Julian Anastasov, Yizhou Zhao,
Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Julian Anastasov <ja@ssi.bg>
commit 8f843441c4e7eae8ea83491e8c203c2b192edcf5 upstream.
The upper/lower connection thresholds for dest can be changed,
so use ip_vs_dest_update_overload() to properly update the
dest overload flag.
The thresholds were not limited, fit them in the 0 .. INT_MAX
range as already done in ipvsadm.
As the thresholds are also read when connections are created
and expired, use WRITE_ONCE/READ_ONCE to access them.
As the lower threshold is optional, use (u - (u >> 2)) to
calculate the 75% default value based on the upper threshold
by preserving the integer rounding, as suggested by Yizhou Zhao.
Trigger flag update when totalconns reaches one of the
thresholds and use dst_lock to serialize the updating.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/ip_vs.h | 3 +
net/netfilter/ipvs/ip_vs_conn.c | 27 +++++-----------
net/netfilter/ipvs/ip_vs_ctl.c | 67 +++++++++++++++++++++++++++++++++++-----
3 files changed, 72 insertions(+), 25 deletions(-)
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -740,6 +740,7 @@ struct ip_vs_dest {
atomic_t persistconns; /* persistent connections */
__u32 u_threshold; /* upper threshold */
__u32 l_threshold; /* lower threshold */
+ __u32 l_threshold_val;/* used lower threshold */
/* for destination cache */
spinlock_t dst_lock; /* lock of dst_cache */
@@ -1567,6 +1568,8 @@ static inline void ip_vs_dest_put_and_fr
kfree(dest);
}
+void ip_vs_dest_update_overload(struct ip_vs_dest *dest, int mode);
+
/* IPVS sync daemon data and function prototypes
* (from ip_vs_sync.c)
*/
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -621,22 +621,22 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, s
/* Update the connection counters */
if (!(flags & IP_VS_CONN_F_TEMPLATE)) {
+ int tc;
+
/* It is a normal connection, so modify the counters
* according to the flags, later the protocol can
* update them on state change
*/
if (!(flags & IP_VS_CONN_F_INACTIVE))
atomic_inc(&dest->activeconns);
- atomic_inc(&dest->totalconns);
+ tc = atomic_inc_return(&dest->totalconns);
+ if (tc == READ_ONCE(dest->u_threshold))
+ ip_vs_dest_update_overload(dest, 1);
} else {
/* It is a persistent connection/template, so increase
the persistent connection counter */
atomic_inc(&dest->persistconns);
}
-
- if (dest->u_threshold != 0 &&
- atomic_read(&dest->totalconns) >= dest->u_threshold)
- dest->flags |= IP_VS_DEST_F_OVERLOAD;
}
@@ -717,27 +717,20 @@ static inline void ip_vs_unbind_dest(str
/* Update the connection counters */
if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
+ int tc;
+
/* It is a normal connection, so decrease the counters */
if (!(cp->flags & IP_VS_CONN_F_INACTIVE))
atomic_dec(&dest->activeconns);
- atomic_dec(&dest->totalconns);
+ tc = atomic_fetch_dec(&dest->totalconns);
+ if (tc == READ_ONCE(dest->l_threshold_val))
+ ip_vs_dest_update_overload(dest, -1);
} else {
/* It is a persistent connection/template, so decrease
the persistent connection counter */
atomic_dec(&dest->persistconns);
}
- if (dest->l_threshold != 0) {
- if (atomic_read(&dest->totalconns) < dest->l_threshold)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- } else if (dest->u_threshold != 0) {
- if (atomic_read(&dest->totalconns) * 4 < dest->u_threshold * 3)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- } else {
- if (dest->flags & IP_VS_DEST_F_OVERLOAD)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- }
-
ip_vs_dest_put(dest);
}
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -960,6 +960,40 @@ void ip_vs_stats_free(struct ip_vs_stats
}
}
+/* Update overload flag based on number of dest conns and lower/upper
+ * connection thresholds:
+ * - conns reach u_threshold and exceed it: set the flag
+ * - conns go below l_threshold (or 75% of u_threshold): clear the flag
+ */
+static void __ip_vs_dest_update_overload(struct ip_vs_dest *dest, int mode)
+{
+ int conns;
+ u32 l, u;
+
+ lockdep_assert_held(&dest->dst_lock);
+ u = READ_ONCE(dest->u_threshold);
+ if (!u)
+ goto unset;
+ l = READ_ONCE(dest->l_threshold_val);
+ conns = atomic_read(&dest->totalconns);
+ if (conns >= (mode > 0 ? l : u)) {
+ dest->flags |= IP_VS_DEST_F_OVERLOAD;
+ return;
+ }
+ if (conns >= (mode < 0 ? u : l))
+ return;
+
+unset:
+ dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
+}
+
+void ip_vs_dest_update_overload(struct ip_vs_dest *dest, int mode)
+{
+ spin_lock_bh(&dest->dst_lock);
+ __ip_vs_dest_update_overload(dest, mode);
+ spin_unlock_bh(&dest->dst_lock);
+}
+
/*
* Update a destination in the given service
*/
@@ -1026,10 +1060,19 @@ __ip_vs_update_dest(struct ip_vs_service
/* set the dest status flags */
dest->flags |= IP_VS_DEST_F_AVAILABLE;
- if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- dest->u_threshold = udest->u_threshold;
- dest->l_threshold = udest->l_threshold;
+ if (READ_ONCE(dest->u_threshold) != udest->u_threshold ||
+ READ_ONCE(dest->l_threshold) != udest->l_threshold) {
+ spin_lock_bh(&dest->dst_lock);
+ WRITE_ONCE(dest->u_threshold, udest->u_threshold);
+ WRITE_ONCE(dest->l_threshold, udest->l_threshold);
+ /* Low threshold defaults to 75% of upper threshold */
+ WRITE_ONCE(dest->l_threshold_val,
+ udest->l_threshold ? :
+ (udest->u_threshold -
+ (udest->u_threshold >> 2)));
+ __ip_vs_dest_update_overload(dest, 0);
+ spin_unlock_bh(&dest->dst_lock);
+ }
dest->af = udest->af;
@@ -1142,6 +1185,9 @@ ip_vs_add_dest(struct ip_vs_service *svc
return -ERANGE;
}
+ if (udest->u_threshold > INT_MAX)
+ return -EINVAL;
+
if (udest->tun_type == IP_VS_CONN_F_TUNNEL_TYPE_GUE) {
if (udest->tun_port == 0) {
pr_err("%s(): tunnel port is zero\n", __func__);
@@ -1212,6 +1258,9 @@ ip_vs_edit_dest(struct ip_vs_service *sv
return -ERANGE;
}
+ if (udest->u_threshold > INT_MAX)
+ return -EINVAL;
+
if (udest->tun_type == IP_VS_CONN_F_TUNNEL_TYPE_GUE) {
if (udest->tun_port == 0) {
pr_err("%s(): tunnel port is zero\n", __func__);
@@ -2950,8 +2999,8 @@ __ip_vs_get_dest_entries(struct netns_ip
entry.port = dest->port;
entry.conn_flags = atomic_read(&dest->conn_flags);
entry.weight = atomic_read(&dest->weight);
- entry.u_threshold = dest->u_threshold;
- entry.l_threshold = dest->l_threshold;
+ entry.u_threshold = READ_ONCE(dest->u_threshold);
+ entry.l_threshold = READ_ONCE(dest->l_threshold);
entry.activeconns = atomic_read(&dest->activeconns);
entry.inactconns = ip_vs_dest_inactconns(dest);
entry.persistconns = atomic_read(&dest->persistconns);
@@ -3552,8 +3601,10 @@ static int ip_vs_genl_fill_dest(struct s
dest->tun_port) ||
nla_put_u16(skb, IPVS_DEST_ATTR_TUN_FLAGS,
dest->tun_flags) ||
- nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
- nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
+ nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH,
+ READ_ONCE(dest->u_threshold)) ||
+ nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH,
+ READ_ONCE(dest->l_threshold)) ||
nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
atomic_read(&dest->activeconns)) ||
nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 089/181] ipvs: clear IPv4 options after rebasing tunnel ICMP errors
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (87 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 088/181] ipvs: properly update the overload flag on dest edit Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 090/181] packet: use consistent hard_header_len in non-ring send paths Greg Kroah-Hartman
` (94 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kyle Zeng, David Lee,
Julian Anastasov, Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kyle Zeng <kylebot@openai.com>
commit e0ba936287dfe9783426aac27e5fd76fe35b38c9 upstream.
ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the
quoted original request before passing it to icmp_send(). However,
IPCB(skb)->opt still describes the outer IPv4 header.
A timestamp option in the outer header can therefore leave an offset
that points into the quoted transport header after the rebase.
__ip_options_echo() treats a byte at that stale location as the option
length and copies it into the fixed-size option storage on the
__icmp_send() stack, causing a stack out-of-bounds write.
Clear the stale option metadata after resetting the network header.
Keep the remaining control block fields, including the ingress
interface used by the ICMP response path.
Fixes: f2edb9f7706d ("ipvs: implement passive PMTUD for IPIP packets")
Cc: stable@vger.kernel.org
Assisted-by: Codex:gpt-5.6-sol Codex:gpt-5.5-cyber
Signed-off-by: Kyle Zeng <kylebot@openai.com>
Co-developed-by: David Lee <david.lee@trailofbits.com>
Signed-off-by: David Lee <david.lee@trailofbits.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/ipvs/ip_vs_core.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -1772,6 +1772,7 @@ ip_vs_in_icmp(struct netns_ipvs *ipvs, s
if (pskb_pull(skb, offset2) == NULL)
goto ignore_tunnel;
skb_reset_network_header(skb);
+ memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
/* Ensure the IP header is present in headroom */
if (!pskb_may_pull(skb, hlen_orig))
goto ignore_tunnel;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 090/181] packet: use consistent hard_header_len in non-ring send paths
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (88 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 089/181] ipvs: clear IPv4 options after rebasing tunnel ICMP errors Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 091/181] packet: use consistent hard_header_len in TX_RING send path Greg Kroah-Hartman
` (93 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Qihang Tang, Willem de Bruijn,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qihang Tang <q.h.hack.winter@gmail.com>
commit 03390aa32e669cc4ecd7d34108e2e1afc13d689d upstream.
packet_snd() reads dev->hard_header_len multiple times while allocating
and constructing an skb. Device reconfiguration can change this value
concurrently, for example through bonding device type changes.
For SOCK_RAW, packet_snd() can save a larger value in reserve and later
allocate headroom using a smaller value. Moving skb->data back by reserve
then places it before skb->head, and the following copy from userspace can
attempt an out-of-bounds write.
packet_sendmsg_spkt() has the same issue because it calculates its
reservation and header offset from separate reads before dropping the RCU
read lock to allocate the skb.
Add LL_RESERVED_SPACE_EX() for callers that already saved a header length.
Read hard_header_len once in packet_snd() and use it for allocation and
construction. In packet_sendmsg_spkt(), preserve the allocation-time value
through the device lookup retry.
The separate SOCK_DGRAM consistency problem between hard_header_len and
header_ops->create is not addressed here.
Fixes: b84bbaf7a6c8 ("packet: in packet_snd start writing at link layer allocation")
Cc: stable@vger.kernel.org
Signed-off-by: Qihang Tang <q.h.hack.winter@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260805125729.19220-3-q.h.hack.winter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/netdevice.h | 6 ++++--
net/packet/af_packet.c | 26 ++++++++++++++++----------
2 files changed, 20 insertions(+), 12 deletions(-)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -297,9 +297,11 @@ struct hh_cache {
* We could use other alignment values, but we must maintain the
* relationship HH alignment <= LL alignment.
*/
-#define LL_RESERVED_SPACE(dev) \
- ((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom)) \
+#define LL_RESERVED_SPACE_EX(dev, hlen) \
+ ((((hlen) + READ_ONCE((dev)->needed_headroom)) \
& ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
+#define LL_RESERVED_SPACE(dev) \
+ LL_RESERVED_SPACE_EX(dev, (dev)->hard_header_len)
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom) + (extra)) \
& ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2005,8 +2005,9 @@ static int packet_sendmsg_spkt(struct so
struct net_device *dev;
struct sockcm_cookie sockc;
__be16 proto = 0;
- int err;
+ int hard_header_len;
int extra_len = 0;
+ int err;
/*
* Get and verify the address.
@@ -2049,14 +2050,18 @@ retry:
extra_len = 4; /* We're doing our own CRC */
}
+ /* Keep the allocation-time header length across retry. */
+ if (!skb)
+ hard_header_len = READ_ONCE(dev->hard_header_len);
+
err = -EMSGSIZE;
- if (len > dev->mtu + dev->hard_header_len + VLAN_HLEN + extra_len)
+ if (len > dev->mtu + hard_header_len + VLAN_HLEN + extra_len)
goto out_unlock;
if (!skb) {
- size_t reserved = LL_RESERVED_SPACE(dev);
+ size_t reserved = LL_RESERVED_SPACE_EX(dev, hard_header_len);
int tlen = dev->needed_tailroom;
- unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0;
+ unsigned int hhlen = dev->header_ops ? hard_header_len : 0;
rcu_read_unlock();
skb = sock_wmalloc(sk, len + reserved + tlen, 0, GFP_KERNEL);
@@ -2086,7 +2091,7 @@ retry:
err = -EINVAL;
goto out_unlock;
}
- if (len > (dev->mtu + dev->hard_header_len + extra_len) &&
+ if (len > (dev->mtu + hard_header_len + extra_len) &&
!packet_extra_vlan_len_allowed(dev, skb)) {
err = -EMSGSIZE;
goto out_unlock;
@@ -3008,7 +3013,7 @@ static int packet_snd(struct socket *soc
int offset = 0;
struct packet_sock *po = pkt_sk(sk);
int vnet_hdr_sz = READ_ONCE(po->vnet_hdr_sz);
- int hlen, tlen, linear;
+ int hard_header_len, hlen, tlen, linear;
int extra_len = 0;
/*
@@ -3049,8 +3054,9 @@ static int packet_snd(struct socket *soc
goto out_unlock;
}
+ hard_header_len = READ_ONCE(dev->hard_header_len);
if (sock->type == SOCK_RAW)
- reserve = dev->hard_header_len;
+ reserve = hard_header_len;
if (vnet_hdr_sz) {
err = packet_snd_vnet_parse(msg, &len, &vnet_hdr, vnet_hdr_sz);
if (err)
@@ -3071,10 +3077,10 @@ static int packet_snd(struct socket *soc
goto out_unlock;
err = -ENOBUFS;
- hlen = LL_RESERVED_SPACE(dev);
+ hlen = LL_RESERVED_SPACE_EX(dev, hard_header_len);
tlen = dev->needed_tailroom;
linear = __virtio16_to_cpu(vio_le(), vnet_hdr.hdr_len);
- linear = max(linear, min_t(int, len, dev->hard_header_len));
+ linear = max(linear, min_t(int, len, hard_header_len));
skb = packet_alloc_skb(sk, hlen + tlen, hlen, len, linear,
msg->msg_flags & MSG_DONTWAIT, &err);
if (skb == NULL)
@@ -3090,7 +3096,7 @@ static int packet_snd(struct socket *soc
} else if (reserve) {
skb_reserve(skb, -reserve);
if (len < reserve + sizeof(struct ipv6hdr) &&
- dev->min_header_len != dev->hard_header_len)
+ dev->min_header_len != hard_header_len)
skb_reset_network_header(skb);
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 091/181] packet: use consistent hard_header_len in TX_RING send path
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (89 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 090/181] packet: use consistent hard_header_len in non-ring send paths Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 092/181] net/packet: reset the MAC header on the packet-socket transmit path Greg Kroah-Hartman
` (92 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Qihang Tang, Willem de Bruijn,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qihang Tang <q.h.hack.winter@gmail.com>
commit 21b5953e7494c16a42e6cd8cf110e18d13ae4a6b upstream.
tpacket_snd() reads dev->hard_header_len independently for skb
allocation and header construction in tpacket_fill_skb(). Concurrent
netdevice reconfiguration can therefore make the reserved headroom
smaller than the amount later pushed, or make copylen - hard_header_len
negative.
Snapshot hard_header_len once before processing ring frames and use it
for the frame limit, headroom allocation, copy length, and skb
construction. Pass the snapshot to tpacket_fill_skb().
The separate SOCK_DGRAM consistency problem between hard_header_len and
header_ops->create is not addressed here.
Fixes: 69e3c75f4d54 ("net: TX_RING and packet mmap")
Cc: stable@vger.kernel.org
Signed-off-by: Qihang Tang <q.h.hack.winter@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260805125729.19220-4-q.h.hack.winter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/packet/af_packet.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2626,6 +2626,7 @@ static int packet_snd_vnet_parse(struct
static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
void *frame, struct net_device *dev, void *data, int tp_len,
__be16 proto, unsigned char *addr, int hlen, int copylen,
+ int hard_header_len,
const struct sockcm_cookie *sockc)
{
union tpacket_uhdr ph;
@@ -2657,8 +2658,8 @@ static int tpacket_fill_skb(struct packe
} else if (copylen) {
int hdrlen = min_t(int, copylen, tp_len);
- skb_push(skb, dev->hard_header_len);
- skb_put(skb, copylen - dev->hard_header_len);
+ skb_push(skb, hard_header_len);
+ skb_put(skb, copylen - hard_header_len);
err = skb_store_bits(skb, 0, data, hdrlen);
if (unlikely(err))
return err;
@@ -2789,7 +2790,7 @@ static int tpacket_snd(struct packet_soc
void *data;
int len_sum = 0;
int status = TP_STATUS_AVAILABLE;
- int hlen, tlen, copylen = 0;
+ int hard_header_len, hlen, tlen, copylen = 0;
long timeo;
mutex_lock(&po->pg_vec_lock);
@@ -2836,8 +2837,9 @@ static int tpacket_snd(struct packet_soc
goto out_put;
}
+ hard_header_len = READ_ONCE(dev->hard_header_len);
if (po->sk.sk_socket->type == SOCK_RAW)
- reserve = dev->hard_header_len;
+ reserve = hard_header_len;
size_max = po->tx_ring.frame_size
- (po->tp_hdrlen - sizeof(struct sockaddr_ll));
@@ -2874,7 +2876,7 @@ static int tpacket_snd(struct packet_soc
goto tpacket_error;
status = TP_STATUS_SEND_REQUEST;
- hlen = LL_RESERVED_SPACE(dev);
+ hlen = LL_RESERVED_SPACE_EX(dev, hard_header_len);
tlen = dev->needed_tailroom;
if (vnet_hdr_sz) {
data += vnet_hdr_sz;
@@ -2892,10 +2894,10 @@ static int tpacket_snd(struct packet_soc
vnet_hdr.hdr_len);
has_vnet_hdr = true;
}
- copylen = max_t(int, copylen, dev->hard_header_len);
+ copylen = max_t(int, copylen, hard_header_len);
skb = sock_alloc_send_skb(&po->sk,
hlen + tlen + sizeof(struct sockaddr_ll) +
- (copylen - dev->hard_header_len),
+ (copylen - hard_header_len),
!need_wait, &err);
if (unlikely(skb == NULL)) {
@@ -2905,7 +2907,8 @@ static int tpacket_snd(struct packet_soc
goto out_status;
}
tp_len = tpacket_fill_skb(po, skb, ph, dev, data, tp_len, proto,
- addr, hlen, copylen, &sockc);
+ addr, hlen, copylen, hard_header_len,
+ &sockc);
if (likely(tp_len >= 0) &&
tp_len > dev->mtu + reserve &&
!vnet_hdr_sz &&
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 092/181] net/packet: reset the MAC header on the packet-socket transmit path
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (90 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 091/181] packet: use consistent hard_header_len in TX_RING send path Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 093/181] packet: synchronize pressure clearing with ring reconfiguration Greg Kroah-Hartman
` (91 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Doruk Tan Ozturk, Willem de Bruijn,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Doruk Tan Ozturk <doruk@0sec.ai>
commit c2707480cfbf19c7619acc9c089d17f20869821f upstream.
packet_parse_headers() resets the MAC header only for a SOCK_RAW frame
whose socket did not bind a protocol. A protocol-bound SOCK_RAW socket,
any SOCK_DGRAM frame, and the legacy SOCK_PACKET path therefore leave
skb->mac_header unset here.
For frames sent via __dev_queue_xmit() this is harmless: it resets the
MAC header unconditionally. But the packet-socket PACKET_QDISC_BYPASS
path uses dev_direct_xmit(), which does not, so the frame reaches
ndo_start_xmit() with the MAC header unset. A driver that reads
eth_hdr(skb) on transmit then dereferences skb->head + (u16)~0, an
out-of-bounds access ~64 KiB past the head -- the same class fixed for
one consumer in commit f5089008f90c ("macsec: do not read an unset MAC
header in macsec_encrypt()").
packet_parse_headers() runs only on the transmit path, where skb->data
points at the start of the L2 header for every packet-socket type
regardless of its length: SOCK_RAW and SOCK_PACKET carry a user-supplied
header and SOCK_DGRAM has one built by dev_hard_header(). Reset the MAC
header unconditionally, mirroring __dev_queue_xmit(), so the frame is
anchored on the bypass path too.
Found by 0sec (https://0sec.ai) using automated source analysis;
verified against source and matched to the macsec KASAN report in
f5089008f90c. Compile-tested.
Fixes: 75c65772c3d1 ("net/packet: Ask driver for protocol if not provided by user")
Cc: stable@vger.kernel.org
Signed-off-by: Doruk Tan Ozturk <doruk@0sec.ai>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260724144015.63219-1-doruk@0sec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/packet/af_packet.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1976,11 +1976,12 @@ static void packet_parse_headers(struct
{
int depth;
+ /* On TX skb->data is the L2 header; anchor it for all socket types. */
+ skb_reset_mac_header(skb);
+
if ((!skb->protocol || skb->protocol == htons(ETH_P_ALL)) &&
- sock->type == SOCK_RAW) {
- skb_reset_mac_header(skb);
+ sock->type == SOCK_RAW)
skb->protocol = dev_parse_header_protocol(skb);
- }
/* Move network header to the right position for VLAN tagged packets */
if (likely(skb->dev->type == ARPHRD_ETHER) &&
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 093/181] packet: synchronize pressure clearing with ring reconfiguration
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (91 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 092/181] net/packet: reset the MAC header on the packet-socket transmit path Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 094/181] net: fix skb length accounting after generic XDP frag adjustment Greg Kroah-Hartman
` (90 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Vega, Zihan Xi, Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <zihanx@nebusec.ai>
commit 1a35da325cac4d5bcad76a2aa943408a6f1d9000 upstream.
packet_set_ring() updates the RX ring state under sk_receive_queue.lock,
but used to publish the tpacket receive mode through po->prot_hook.func
after releasing that lock. packet_poll() and packet_recvmsg() can then
run the pressure clearing path after the ring has been cleared while
still seeing tpacket_rcv, causing __packet_rcv_has_room() to dereference
stale or NULL ring storage.
Move the existing receive hook assignment into the same
sk_receive_queue.lock section as the ring state update. Keep the
assignment otherwise unchanged, including on TX ring reconfiguration, to
avoid adding behavior changes that are not required for the fix.
Serialize packet_recvmsg() pressure clearing with the same queue lock
only after PACKET_SOCK_PRESSURE has been observed. If the flag is clear
and the socket has moved away from tpacket_rcv, packet_set_ring() has
already detached the socket and waited for synchronize_net(), so no new
packet input can set the flag again.
packet_poll() already holds sk_receive_queue.lock, so it uses the new
unlocked helper directly.
Fixes: 2ccdbaa6d55b ("packet: rollover lock contention avoidance")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: Codex:gpt-5.4
Signed-off-by: Zihan Xi <zihanx@nebusec.ai>
Link: https://patch.msgid.link/f90b5688311fa278d1361ea8c6be0bf25967d591.1785247446.git.zihanx@nebusec.ai
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/packet/af_packet.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1367,13 +1367,25 @@ static int packet_rcv_has_room(struct pa
return ret;
}
-static void packet_rcv_try_clear_pressure(struct packet_sock *po)
+static void __packet_rcv_try_clear_pressure(struct packet_sock *po)
{
if (packet_sock_flag(po, PACKET_SOCK_PRESSURE) &&
__packet_rcv_has_room(po, NULL) == ROOM_NORMAL)
packet_sock_flag_set(po, PACKET_SOCK_PRESSURE, false);
}
+static void packet_rcv_try_clear_pressure(struct packet_sock *po)
+{
+ struct sock *sk = &po->sk;
+
+ if (!packet_sock_flag(po, PACKET_SOCK_PRESSURE))
+ return;
+
+ spin_lock_bh(&sk->sk_receive_queue.lock);
+ __packet_rcv_try_clear_pressure(po);
+ spin_unlock_bh(&sk->sk_receive_queue.lock);
+}
+
static void packet_sock_destruct(struct sock *sk)
{
skb_queue_purge(&sk->sk_error_queue);
@@ -4357,7 +4369,7 @@ static __poll_t packet_poll(struct file
TP_STATUS_KERNEL))
mask |= EPOLLIN | EPOLLRDNORM;
}
- packet_rcv_try_clear_pressure(po);
+ __packet_rcv_try_clear_pressure(po);
spin_unlock_bh(&sk->sk_receive_queue.lock);
spin_lock_bh(&sk->sk_write_queue.lock);
if (po->tx_ring.pg_vec) {
@@ -4597,14 +4609,14 @@ static int packet_set_ring(struct sock *
rb->frame_max = (req->tp_frame_nr - 1);
rb->head = 0;
rb->frame_size = req->tp_frame_size;
+ po->prot_hook.func = (po->rx_ring.pg_vec) ?
+ tpacket_rcv : packet_rcv;
spin_unlock_bh(&rb_queue->lock);
swap(rb->pg_vec_order, order);
swap(rb->pg_vec_len, req->tp_block_nr);
rb->pg_vec_pages = req->tp_block_size/PAGE_SIZE;
- po->prot_hook.func = (po->rx_ring.pg_vec) ?
- tpacket_rcv : packet_rcv;
skb_queue_purge(rb_queue);
if (atomic_long_read(&po->mapped))
pr_err("packet_mmap: vma is busy: %ld\n",
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 094/181] net: fix skb length accounting after generic XDP frag adjustment
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (92 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 093/181] packet: synchronize pressure clearing with ring reconfiguration Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 095/181] net: openvswitch: reallocate update replies for mismatched IDs Greg Kroah-Hartman
` (89 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mohsin Bashir, Lorenzo Bianconi,
Sun Jian, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sun Jian <sun.jian.kdev@gmail.com>
commit 33f2b2eb33d666ecac68031e0f31424fb70528db upstream.
Generic XDP exposes non-linear skb fragments through an xdp_buff. If an
XDP program adjusts the fragment area, bpf_prog_run_generic_xdp() copies
xdp_frags_size back to skb->data_len but leaves skb->len containing the
old fragment contribution.
After a fragment shrink, this makes skb_headlen() larger than the actual
linear area. In the reproduced UDP receive path, __skb_datagram_iter()
copied 1024 bytes past the actual linear tail to userspace, starting at
struct skb_shared_info. The copied bytes included the affected skb's
nr_frags, xdp_frags_size and a kernel pointer from
skb_shinfo(skb)->frags[0]. Real packet data was displaced by the same
amount and truncated at the end.
Subtract the old data_len before replacing it and add the new data_len
afterwards, keeping skb->len and skb->data_len synchronized.
A 60000-byte UDP datagram on a veth pair with MTU 64000 was shortened by
1024 bytes from its fragment area. Before the fix, all 10 runs produced
corrupted payloads. After the fix, all 10 runs matched the expected
payload exactly.
Fixes: e6d5dbdd20aa ("xdp: add multi-buff support for xdp running in generic mode")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/bpf/al9T9Eto%2FhRIzP5W@boxer/
Reviewed-by: Mohsin Bashir <hmohsin@meta.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sun Jian <sun.jian.kdev@gmail.com>
Link: https://patch.msgid.link/20260804054040.613675-2-sun.jian.kdev@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/core/dev.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5116,12 +5116,16 @@ u32 bpf_prog_run_generic_xdp(struct sk_b
}
/* XDP frag metadata (e.g. nr_frags) are updated in eBPF helpers
- * (e.g. bpf_xdp_adjust_tail), we need to update data_len here.
+ * (e.g. bpf_xdp_adjust_tail). Remove the old fragment contribution
+ * from skb->len before updating data_len, then add the new one back.
*/
- if (xdp_buff_has_frags(xdp))
+ skb->len -= skb->data_len;
+ if (xdp_buff_has_frags(xdp)) {
skb->data_len = skb_shinfo(skb)->xdp_frags_size;
- else
+ skb->len += skb->data_len;
+ } else {
skb->data_len = 0;
+ }
/* check if XDP changed eth hdr such SKB needs update */
eth = (struct ethhdr *)xdp->data;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 095/181] net: openvswitch: reallocate update replies for mismatched IDs
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (93 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 094/181] net: fix skb length accounting after generic XDP frag adjustment Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 096/181] net/sched: reject overly deep qdisc hierarchies Greg Kroah-Hartman
` (88 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zhiling Zou, Ilya Maximets,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhiling Zou <zhilinz@nebusec.ai>
commit 5d1c224dd914579524a183a514c12b95095d12ce upstream.
ovs_flow_cmd_new() preallocates the optional reply skb before it takes
ovs_mutex and before it knows which existing flow will be updated.
That is normally fine because the skb is sized from the request flow
identifier. That identifier also becomes the inserted flow's identifier.
For updates, however, a request with a UFID may miss the UFID lookup and
then fall back to the flow key lookup. That lookup can legitimately find
an existing key-identified flow. UFIDs are optional and the flow key is
the primary identifier.
For echoed replies, ovs_flow_cmd_fill_info() writes the matched flow's
identifier, not the request identifier used for the preallocation. A short
request UFID can therefore leave too little room for the key identifier.
The fill can then fail with -EMSGSIZE and hit the BUG_ON(error < 0) in the
update path.
Once the update target has been resolved, reallocate the reply skb if the
matched flow needs a larger reply than the request identifier allowed. Do
this before replacing the actions so the request can still fail cleanly if
the rare extra allocation fails.
Fixes: 74ed7ab9264c ("openvswitch: Add support for unique flow IDs.")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai>
Reviewed-by: Ilya Maximets <i.maximets@ovn.org>
Link: https://patch.msgid.link/f7bbd3c30ce81a39156e226b3872d73abed21d2f.1785644623.git.zhilinz@nebusec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/openvswitch/datapath.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1083,9 +1083,8 @@ static int ovs_flow_cmd_new(struct sk_bu
error = -EEXIST;
goto err_unlock_ovs;
}
- /* The flow identifier has to be the same for flow updates.
- * Look for any overlapping flow.
- */
+
+ /* Look for any overlapping flow. */
if (unlikely(!ovs_flow_cmp(flow, &match))) {
if (ovs_identifier_is_key(&flow->id))
flow = ovs_flow_tbl_lookup_exact(&dp->table,
@@ -1097,6 +1096,30 @@ static int ovs_flow_cmd_new(struct sk_bu
goto err_unlock_ovs;
}
}
+
+ if (unlikely(reply)) {
+ size_t cur, req;
+
+ cur = ovs_flow_cmd_msg_size(acts, &new_flow->id,
+ ufid_flags);
+ req = ovs_flow_cmd_msg_size(acts, &flow->id,
+ ufid_flags);
+ if (cur < req) {
+ struct sk_buff *resized;
+
+ resized = ovs_flow_cmd_alloc_info(acts,
+ &flow->id,
+ info, false,
+ ufid_flags);
+ if (IS_ERR(resized)) {
+ error = PTR_ERR(resized);
+ goto err_unlock_ovs;
+ }
+ kfree_skb(reply);
+ reply = resized;
+ }
+ }
+
/* Update actions. */
old_acts = ovsl_dereference(flow->sf_acts);
rcu_assign_pointer(flow->sf_acts, acts);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 096/181] net/sched: reject overly deep qdisc hierarchies
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (94 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 095/181] net: openvswitch: reallocate update replies for mismatched IDs Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 097/181] net: octeontx2-pf: Fix UB in shift operation Greg Kroah-Hartman
` (87 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jamal Hadi Salim, Vega, Zijie Huang,
Ren Wei, Victor Nogueira, Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zijie Huang <milkory@outlook.com>
commit dedd34b0f2310e28c5f6d4875cfbf4b7ed821c01 upstream.
Deep qdisc hierarchies can lead to excessive recursion in qdisc tree
walkers and exhaust the kernel stack. The existing loop check does not
cover the create-and-graft path, so a hierarchy can still be extended by
creating a new child qdisc below an already deep parent.
Store the hierarchy depth in struct Qdisc and update it when qdiscs are
grafted. Reject new child qdiscs once the parent is already at the maximum
allowed depth.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Suggested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: Codex:gpt-5.4
Signed-off-by: Zijie Huang <milkory@outlook.com>
Signed-off-by: Ren Wei <enjou1224z@gmail.com>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Link: https://patch.msgid.link/1e9ab39597423fd5d13cfaaf52279b8ee3d9fc3c.1785434373.git.milkory@outlook.com
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/sch_generic.h | 1 +
net/sched/sch_api.c | 9 +++++++++
2 files changed, 10 insertions(+)
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -101,6 +101,7 @@ struct Qdisc {
struct hlist_node hash;
u32 handle;
u32 parent;
+ int depth;
struct netdev_queue *dev_queue;
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1095,6 +1095,9 @@ static int qdisc_graft(struct net_device
unsigned int i, num_q, ingress;
struct netdev_queue *dev_queue;
+ if (new)
+ new->depth = 0;
+
ingress = 0;
num_q = dev->num_tx_queues;
if ((q && q->flags & TCQ_F_INGRESS) ||
@@ -1192,9 +1195,15 @@ skip:
NL_SET_ERR_MSG(extack, "STAB not supported on a non root");
return -EINVAL;
}
+ if (new && parent->depth >= 7) {
+ NL_SET_ERR_MSG(extack, "Qdisc hierarchy is too deep");
+ return -E2BIG;
+ }
err = cops->graft(parent, cl, new, &old, extack);
if (err)
return err;
+ if (new)
+ new->depth = parent->depth + 1;
notify_and_destroy(net, skb, n, classid, old, new, extack);
}
return 0;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 097/181] net: octeontx2-pf: Fix UB in shift operation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (95 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 096/181] net/sched: reject overly deep qdisc hierarchies Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 098/181] net: remove CAP_SYS_RAWIO zero-padding in dev_validate_header Greg Kroah-Hartman
` (86 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sergey V. Frolov, Ratheesh Kannoth,
Sunil Goutham, Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sergey V. Frolov <Sergey.V.Frolov@kaspersky.com>
commit 7e2d693af0d4c05bddccb3541a0aabd69f4cb244 upstream.
In function otx2_get_egress_burst_cfg, when the parameter `burst` is
255 and the max mantissa is 255 (0xFFULL), `burst_exp` is set to
`ilog2(255) - 1`, which equals 6.
This results in an unsigned wrap-around when calculating
`(1ULL << (*burst_exp - 7))`, since `*burst_exp - 7` becomes -1,
which makes the shift operand 0xFFFFFFFF. This value is greater than
the width of the left operand.
According to standard 6.5.7 p.3:
"The type of the result is that of the promoted left operand.
If the value of the right operand is negative or is greater than
or equal to the width of the promoted left operand, the behavior
is undefined."
Fix the off-by-one boundary condition.
Add a WARN_ON(*burst_exp < 7) before the else branch as an
explicit safeguard. This ensures that if max_mantissa ever changes
in a way that reintroduces this condition, it will be immediately
caught at runtime rather than silently triggering UB.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: e638a83f167e ("octeontx2-pf: TC_MATCHALL egress ratelimiting offload")
Signed-off-by: Sergey V. Frolov <Sergey.V.Frolov@kaspersky.com>
Cc: stable@vger.kernel.org
Reviewed-by: Ratheesh Kannoth <rkannoth@marvell.com>
Reviewed-by: Sunil Goutham <sgoutham@marvell.com>
Link: https://patch.msgid.link/20260804120446.1955448-1-Sergey.V.Frolov@kaspersky.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
@@ -78,10 +78,12 @@ static void otx2_get_egress_burst_cfg(st
if (burst) {
*burst_exp = ilog2(burst) ? ilog2(burst) - 1 : 0;
tmp = burst - rounddown_pow_of_two(burst);
- if (burst < max_mantissa)
+ if (burst <= max_mantissa) {
*burst_mantissa = tmp * 2;
- else
+ } else {
+ WARN_ON(*burst_exp < 7);
*burst_mantissa = tmp / (1ULL << (*burst_exp - 7));
+ }
} else {
*burst_exp = MAX_BURST_EXPONENT;
*burst_mantissa = max_mantissa;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 098/181] net: remove CAP_SYS_RAWIO zero-padding in dev_validate_header
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (96 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 097/181] net: octeontx2-pf: Fix UB in shift operation Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 099/181] mac802154: fix netdev use-after-free in beacon worker Greg Kroah-Hartman
` (85 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Willem de Bruijn, Qihang Tang,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qihang Tang <q.h.hack.winter@gmail.com>
commit 3b9a324e646d3657a8d9806dfbfe4f3e4066e882 upstream.
dev_validate_header() reads dev->hard_header_len directly when
zero-padding short link layer headers for CAP_SYS_RAWIO holders:
if (capable(CAP_SYS_RAWIO)) {
memset(ll_header + len, 0, dev->hard_header_len - len);
return true;
}
Packet send paths call dev_validate_header() on skbs whose headroom was
allocated from an earlier hard_header_len read. If the device is
reconfigured so that dev->hard_header_len increases before validation,
the memset writes past the reserved buffer, an out-of-bounds write.
This out-of-bounds write is masked in some SOCK_RAW paths today because
the same concurrent increase can first make skb_push() exceed the
reserved headroom and trigger skb_under_panic(). Remove the zero-padding
branch before making those hard_header_len reads consistent, so the
snapshot fixes do not turn a loud panic into a silent overwrite.
This path is only reached for variable length L2 protocols, where
len < hard_header_len but len >= min_header_len. No remaining in-tree
variable length L2 protocol implements header_ops->validate, and the
CAP_SYS_RAWIO bypass that zero-pads and accepts short headers has no
real value beyond allowing testing of intentionally malformed input.
Drop the CAP_SYS_RAWIO branch. The remaining reads of
dev->hard_header_len in dev_validate_header() are comparisons only and
have no memory safety impact.
Suggested-by: Willem de Bruijn <willemb@google.com>
Fixes: 2793a23aacbd ("net: validate variable length ll headers")
Cc: stable@vger.kernel.org
Signed-off-by: Qihang Tang <q.h.hack.winter@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260805125729.19220-2-q.h.hack.winter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/netdevice.h | 5 -----
1 file changed, 5 deletions(-)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3191,11 +3191,6 @@ static inline bool dev_validate_header(c
if (len < dev->min_header_len)
return false;
- if (capable(CAP_SYS_RAWIO)) {
- memset(ll_header + len, 0, dev->hard_header_len - len);
- return true;
- }
-
if (dev->header_ops && dev->header_ops->validate)
return dev->header_ops->validate(ll_header, len);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 099/181] mac802154: fix netdev use-after-free in beacon worker
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (97 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 098/181] net: remove CAP_SYS_RAWIO zero-padding in dev_validate_header Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 100/181] netfilter: ebt_nflog: pin the NFLOG backend Greg Kroah-Hartman
` (84 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zihan Xi, Miquel Raynal,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <zihanx@nebusec.ai>
commit 5f26a690e8efa54315e4922368daf54e0b8f5515 upstream.
mac802154_beacon_worker() reads local->beacon_req under RCU and derives
the sub-interface from the request, but then drops the RCU read lock and
continues to use both sdata and the embedded wpan_dev.
mac802154_stop_beacons_locked() cancels only pending beacon work, clears
local->beacon_req and frees the request. A beacon worker that is already
running can therefore continue after interface teardown and dereference
the freed netdev private area.
The scan worker already pins the netdev before leaving RCU. Apply the
same lifetime rule to the beacon worker: take a netdev reference while
the request is still protected by RCU, and release it on all paths that
continue after the reference is acquired.
Fixes: 3accf4762734 ("mac802154: Handle basic beaconing")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zihan Xi <zihanx@nebusec.ai>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/e9a3909c7a6281967961773ca841e860b8ecf40e.1785596603.git.zihanx@nebusec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/mac802154/scan.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/net/mac802154/scan.c
+++ b/net/mac802154/scan.c
@@ -415,6 +415,7 @@ void mac802154_beacon_worker(struct work
container_of(work, struct ieee802154_local, beacon_work.work);
struct cfg802154_beacon_request *beacon_req;
struct ieee802154_sub_if_data *sdata;
+ netdevice_tracker dev_tracker;
struct wpan_dev *wpan_dev;
u8 interval;
int ret;
@@ -427,12 +428,14 @@ void mac802154_beacon_worker(struct work
}
sdata = IEEE802154_WPAN_DEV_TO_SUB_IF(beacon_req->wpan_dev);
+ netdev_hold(sdata->dev, &dev_tracker, GFP_ATOMIC);
/* Wait an arbitrary amount of time in case we cannot use the device */
if (local->suspended || !ieee802154_sdata_running(sdata)) {
rcu_read_unlock();
queue_delayed_work(local->mac_wq, &local->beacon_work,
msecs_to_jiffies(1000));
+ netdev_put(sdata->dev, &dev_tracker);
return;
}
@@ -450,6 +453,7 @@ void mac802154_beacon_worker(struct work
if (interval < IEEE802154_ACTIVE_SCAN_DURATION)
queue_delayed_work(local->mac_wq, &local->beacon_work,
local->beacon_interval);
+ netdev_put(sdata->dev, &dev_tracker);
}
int mac802154_stop_beacons_locked(struct ieee802154_local *local,
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 100/181] netfilter: ebt_nflog: pin the NFLOG backend
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (98 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 099/181] mac802154: fix netdev use-after-free in beacon worker Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 101/181] net: bridge: mrp: fix uninitialised bytes on the wire Greg Kroah-Hartman
` (83 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Chengfeng Ye, Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chengfeng Ye <nicoyip.dev@gmail.com>
commit 30825970339c107bacaf7f61af90fcdb1f597ca1 upstream.
nf_log_unregister() runs after the per-net teardown so its final RCU
grace period also drains readers that obtained the logger from a per-net
binding. However, ebt_nflog passes an explicit ULOG log type to
nf_log_packet() without holding a reference on the selected logger module,
unlike the xt_NFLOG and nft_log frontends.
An ebtables nflog rule can therefore remain callable while nfnetlink_log
is unloaded. The resulting interleaving is:
CPU 0 CPU 1
nfnetlink_log_fini()
unregister_pernet_subsys()
kfree(nfnl_log_pernet(net))
ebt_nflog_tg()
nf_log_packet()
nfulnl_log_packet()
instance_lookup_get_rcu()
The global ULOG logger is still registered at this point, so CPU 1
dereferences the per-net state after CPU 0 has freed it. KASAN reported:
BUG: KASAN: slab-use-after-free in instance_lookup_get_rcu
Read of size 8 at addr ff110001052e6210 by task poc/92
Call Trace:
instance_lookup_get_rcu+0x1ce/0x1f0 [nfnetlink_log]
nfulnl_log_packet+0x248/0x2fb0 [nfnetlink_log]
nf_log_packet+0x204/0x300
ebt_nflog_tg+0x351/0x550
ebt_do_table+0xedf/0x22b0
Allocated by task 90:
__kmalloc_noprof+0x186/0x470
ops_init+0x6d/0x420
register_pernet_operations+0x2f6/0x670
register_pernet_subsys+0x23/0x40
Freed by task 93:
kfree+0x131/0x3c0
ops_undo_list+0x3e3/0x700
unregister_pernet_operations+0x232/0x490
unregister_pernet_subsys+0x1c/0x30
nfnetlink_log_fini+0x34/0x450 [nfnetlink_log]
Acquire the ULOG logger module reference when an ebt_nflog rule is
validated and release it when the rule is destroyed. Request the NFLOG
backend for legacy callers when needed, matching xt_NFLOG. This prevents
module teardown until all ebt_nflog rules have stopped using the logger.
Fixes: c83fa19603bd ("netfilter: nf_log: don't call synchronize_rcu in nf_log_unset")
Cc: stable@vger.kernel.org
Signed-off-by: Chengfeng Ye <nicoyip.dev@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/bridge/netfilter/ebt_nflog.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
--- a/net/bridge/netfilter/ebt_nflog.c
+++ b/net/bridge/netfilter/ebt_nflog.c
@@ -41,11 +41,25 @@ ebt_nflog_tg(struct sk_buff *skb, const
static int ebt_nflog_tg_check(const struct xt_tgchk_param *par)
{
struct ebt_nflog_info *info = par->targinfo;
+ int ret;
if (info->flags & ~EBT_NFLOG_MASK)
return -EINVAL;
info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0';
- return 0;
+
+ ret = nf_logger_find_get(par->family, NF_LOG_TYPE_ULOG);
+ if (ret != 0 && !par->nft_compat) {
+ request_module("%s", "nfnetlink_log");
+
+ ret = nf_logger_find_get(par->family, NF_LOG_TYPE_ULOG);
+ }
+
+ return ret;
+}
+
+static void ebt_nflog_tg_destroy(const struct xt_tgdtor_param *par)
+{
+ nf_logger_put(par->family, NF_LOG_TYPE_ULOG);
}
static struct xt_target ebt_nflog_tg_reg __read_mostly = {
@@ -54,6 +68,7 @@ static struct xt_target ebt_nflog_tg_reg
.family = NFPROTO_BRIDGE,
.target = ebt_nflog_tg,
.checkentry = ebt_nflog_tg_check,
+ .destroy = ebt_nflog_tg_destroy,
.targetsize = sizeof(struct ebt_nflog_info),
.me = THIS_MODULE,
};
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 101/181] net: bridge: mrp: fix uninitialised bytes on the wire
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (99 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 100/181] netfilter: ebt_nflog: pin the NFLOG backend Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 102/181] KVM: s390: pci: Fix memory accounting for pinned/unpinned pages Greg Kroah-Hartman
` (82 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Nikolay Aleksandrov, Baul Lee,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baul Lee <baul.lee@xbow.com>
commit 63488dba65ef91373ef616575b32eb0eb21459f4 upstream.
br_mrp_alloc_test_skb() builds MRP test frames on an skb from
dev_alloc_skb(), which does not clear the linear data area. On the MRA
ring-role branch the sub-option TLV header is appended with
sub_tlv = skb_put(skb, sizeof(*sub_tlv));
sub_tlv->type = BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR;
so sub_tlv->length is never written, and the two trailing alignment bytes
are appended with a bare skb_put() that does not clear them either. The
neighbouring oui and sub_opt regions are explicitly zeroed, so three
uninitialised bytes are left in every MRA MRP_Test frame that goes out.
Put the sub-option TLV header and the alignment padding in a single
skb_put_zero(), which clears both. The AUTO_MGR sub-TLV carries no
payload, so the zeroed length field is already the value it should have.
Fixes: f7458934b079 ("net: bridge: mrp: Update the Test frames for MRA")
Suggested-by: Nikolay Aleksandrov <razor@blackwall.org>
Cc: stable@vger.kernel.org
Signed-off-by: Baul Lee <baul.lee@xbow.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260729131941.10254-1-baul.lee@xbow.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/bridge/br_mrp.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c
@@ -224,11 +224,9 @@ static struct sk_buff *br_mrp_alloc_test
sub_opt = skb_put(skb, sizeof(*sub_opt));
memset(sub_opt, 0x0, sizeof(*sub_opt));
- sub_tlv = skb_put(skb, sizeof(*sub_tlv));
- sub_tlv->type = BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR;
-
/* 32 bit alligment shall be ensured therefore add 2 bytes */
- skb_put(skb, MRP_OPT_PADDING);
+ sub_tlv = skb_put_zero(skb, sizeof(*sub_tlv) + MRP_OPT_PADDING);
+ sub_tlv->type = BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR;
}
br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_END, 0x0);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 102/181] KVM: s390: pci: Fix memory accounting for pinned/unpinned pages
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (100 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 101/181] net: bridge: mrp: fix uninitialised bytes on the wire Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 103/181] KVM: s390: pci: Fix missing error codes and memory unaccounting Greg Kroah-Hartman
` (81 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Christian Borntraeger,
Matthew Rosato, Farhan Ali, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Farhan Ali <alifm@linux.ibm.com>
[ Upstream commit 36f6999ecde3976731a8bfc0b8e667da6f593069 ]
The account_mem() and unaccount_mem() functions call get_uid() which
increments the reference count of struct user_struct on every invocation.
But we don't decrement the count by calling free_uid(). It also
accounted/unaccounted the pages against the current->mm. But its possible
the unaccount_mem() can be called from a different process context than the
one that originally pinned the pages.
Let's fix this by storing the pinning process user_struct and mm_struct
when accounting for pinned pages, and subsequently free these resources
when the pages are unpinned.
Fixes: 3c5a1b6f0a18 ("KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding")
Cc: stable@vger.kernel.org
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
[borntraeger@linux.ibm.com: Fixed whitespace]
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
[alifm@linux.ibm.com: Resolve merge conflict]
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/kvm/pci.c | 48 ++++++++++++++++++++++++++++++++-------------
arch/s390/kvm/pci.h | 2 ++
2 files changed, 36 insertions(+), 14 deletions(-)
diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
index 17fedfc7bb990..f887e11b0f1ef 100644
--- a/arch/s390/kvm/pci.c
+++ b/arch/s390/kvm/pci.c
@@ -191,34 +191,54 @@ static int kvm_zpci_clear_airq(struct zpci_dev *zdev)
return cc ? -EIO : 0;
}
-static inline void unaccount_mem(unsigned long nr_pages)
+static inline void unaccount_mem(struct kvm_zdev *kzdev, unsigned long nr_pages)
{
- struct user_struct *user = get_uid(current_user());
+ struct user_struct *user = kzdev->user_account;
+ struct mm_struct *mm_account = kzdev->mm_account;
- if (user)
+ if (user) {
atomic_long_sub(nr_pages, &user->locked_vm);
- if (current->mm)
- atomic64_sub(nr_pages, ¤t->mm->pinned_vm);
+ free_uid(user);
+ kzdev->user_account = NULL;
+ }
+
+ if (mm_account) {
+ atomic64_sub(nr_pages, &mm_account->pinned_vm);
+ mmdrop(mm_account);
+ kzdev->mm_account = NULL;
+ }
}
-static inline int account_mem(unsigned long nr_pages)
+static inline int account_mem(struct kvm_zdev *kzdev, unsigned long nr_pages)
{
struct user_struct *user = get_uid(current_user());
unsigned long page_limit, cur_pages, new_pages;
+ int rc = 0;
page_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
+ cur_pages = atomic_long_read(&user->locked_vm);
do {
- cur_pages = atomic_long_read(&user->locked_vm);
new_pages = cur_pages + nr_pages;
- if (new_pages > page_limit)
- return -ENOMEM;
- } while (atomic_long_cmpxchg(&user->locked_vm, cur_pages,
- new_pages) != cur_pages);
+ if (new_pages > page_limit) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ } while (!atomic_long_try_cmpxchg(&user->locked_vm, &cur_pages, new_pages));
+
+ if (current->mm) {
+ mmgrab(current->mm);
+ atomic64_add(nr_pages, ¤t->mm->pinned_vm);
+ }
- atomic64_add(nr_pages, ¤t->mm->pinned_vm);
+ kzdev->user_account = user;
+ kzdev->mm_account = current->mm;
return 0;
+
+out:
+ free_uid(user);
+ return rc;
}
static int kvm_s390_pci_aif_enable(struct zpci_dev *zdev, struct zpci_fib *fib,
@@ -295,7 +315,7 @@ static int kvm_s390_pci_aif_enable(struct zpci_dev *zdev, struct zpci_fib *fib,
}
/* Account for pinned pages, roll back on failure */
- if (account_mem(pcount))
+ if (account_mem(zdev->kzdev, pcount))
goto unpin2;
/* AISB must be allocated before we can fill in GAITE */
@@ -424,7 +444,7 @@ static int kvm_s390_pci_aif_disable(struct zpci_dev *zdev, bool force)
pcount++;
}
if (pcount > 0)
- unaccount_mem(pcount);
+ unaccount_mem(kzdev, pcount);
out:
mutex_unlock(&aift->aift_lock);
diff --git a/arch/s390/kvm/pci.h b/arch/s390/kvm/pci.h
index ff0972dd5e71d..fdf8c7bf4ed08 100644
--- a/arch/s390/kvm/pci.h
+++ b/arch/s390/kvm/pci.h
@@ -22,6 +22,8 @@ struct kvm_zdev {
struct kvm *kvm;
struct zpci_fib fib;
struct list_head entry;
+ struct user_struct *user_account;
+ struct mm_struct *mm_account;
};
struct zpci_gaite {
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 103/181] KVM: s390: pci: Fix missing error codes and memory unaccounting
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (101 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 102/181] KVM: s390: pci: Fix memory accounting for pinned/unpinned pages Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 104/181] KVM: s390: pci: Fix resource leak on IRQ registration failure Greg Kroah-Hartman
` (80 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Christian Borntraeger,
Matthew Rosato, Farhan Ali, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Farhan Ali <alifm@linux.ibm.com>
[ Upstream commit f86842e4d6c482300f4567f492d512c9ccf5bc4f ]
In kvm_s390_pci_aif_enable() two error paths failed to set an error code,
causing the function to return 0 on failure. It also failed to rollback
memory accounting on failure. Fix both by propagating an error code on
failure and calling unaccount_mem() in the cleanup path.
Fixes: 3c5a1b6f0a18 ("KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding")
Cc: stable@vger.kernel.org
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
[alifm@linux.ibm.com: Resolve merge conflict]
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/kvm/pci.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
index f887e11b0f1ef..a20fa27fa0301 100644
--- a/arch/s390/kvm/pci.c
+++ b/arch/s390/kvm/pci.c
@@ -315,14 +315,17 @@ static int kvm_s390_pci_aif_enable(struct zpci_dev *zdev, struct zpci_fib *fib,
}
/* Account for pinned pages, roll back on failure */
- if (account_mem(zdev->kzdev, pcount))
+ rc = account_mem(zdev->kzdev, pcount);
+ if (rc)
goto unpin2;
/* AISB must be allocated before we can fill in GAITE */
mutex_lock(&aift->aift_lock);
bit = airq_iv_alloc_bit(aift->sbv);
- if (bit == -1UL)
+ if (bit == -1UL) {
+ rc = -ENOMEM;
goto unlock;
+ }
zdev->aisb = bit; /* store the summary bit number */
zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA |
AIRQ_IV_BITLOCK |
@@ -374,6 +377,8 @@ static int kvm_s390_pci_aif_enable(struct zpci_dev *zdev, struct zpci_fib *fib,
airq_iv_free_bit(aift->sbv, zdev->aisb);
zdev->aisb = 0;
unlock:
+ if (pcount > 0)
+ unaccount_mem(zdev->kzdev, pcount);
mutex_unlock(&aift->aift_lock);
unpin2:
if (fib->fmt0.sum == 1)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 104/181] KVM: s390: pci: Fix resource leak on IRQ registration failure
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (102 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 103/181] KVM: s390: pci: Fix missing error codes and memory unaccounting Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 105/181] KVM: s390: pci: Fix aisb calculation Greg Kroah-Hartman
` (79 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Matthew Rosato,
Christian Borntraeger, Farhan Ali, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Farhan Ali <alifm@linux.ibm.com>
[ Upstream commit 5580c9858f1e00f60191eb09c3add359836d60b6 ]
Currently if kvm_zpci_set_airq() fails, kvm_s390_pci_aif_enable() returns
the error code but doesn't do any resource cleanup thus leaking resources.
Fix this by cleaning up all the resources such as the GAITE, AIBV, AISB and
unpinning any pinned pages. While at it, remove dead code that stored FIB
values that were never referenced.
As part of the cleanup, we are also holding the aift_lock a bit longer, as
we hold the lock while executing the MPCIFC instruction. Though this is not
strictly necessary, it means we don't have to drop and re-acquire in the
error case.
Fixes: 3c5a1b6f0a18 ("KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding")
Cc: stable@vger.kernel.org
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
[alifm@linux.ibm.com: Resolved merge conflict]
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/kvm/pci.c | 29 +++++++++++++++++++++--------
1 file changed, 21 insertions(+), 8 deletions(-)
diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
index a20fa27fa0301..61489016e4252 100644
--- a/arch/s390/kvm/pci.c
+++ b/arch/s390/kvm/pci.c
@@ -359,19 +359,32 @@ static int kvm_s390_pci_aif_enable(struct zpci_dev *zdev, struct zpci_fib *fib,
aift->kzdev[zdev->aisb] = zdev->kzdev;
spin_unlock_irq(&aift->gait_lock);
- /* Update guest FIB for re-issue */
- fib->fmt0.aisbo = zdev->aisb & 63;
- fib->fmt0.aisb = virt_to_phys(aift->sbv->vector + (zdev->aisb / 64) * 8);
- fib->fmt0.isc = gisc;
-
/* Save some guest fib values in the host for later use */
- zdev->kzdev->fib.fmt0.isc = fib->fmt0.isc;
+ zdev->kzdev->fib.fmt0.isc = gisc;
zdev->kzdev->fib.fmt0.aibv = fib->fmt0.aibv;
- mutex_unlock(&aift->aift_lock);
/* Issue the clp to setup the irq now */
rc = kvm_zpci_set_airq(zdev);
- return rc;
+ if (!rc) {
+ mutex_unlock(&aift->aift_lock);
+ return rc;
+ }
+
+ /* Start cleanup */
+ zdev->kzdev->fib.fmt0.isc = 0;
+ zdev->kzdev->fib.fmt0.aibv = 0;
+
+ spin_lock_irq(&aift->gait_lock);
+ gaite->count--;
+ gaite->aisb = 0;
+ gaite->gisc = 0;
+ gaite->aisbo = 0;
+ gaite->gisa = 0;
+ aift->kzdev[zdev->aisb] = NULL;
+ spin_unlock_irq(&aift->gait_lock);
+
+ airq_iv_release(zdev->aibv);
+ zdev->aibv = NULL;
free_aisb:
airq_iv_free_bit(aift->sbv, zdev->aisb);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 105/181] KVM: s390: pci: Fix aisb calculation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (103 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 104/181] KVM: s390: pci: Fix resource leak on IRQ registration failure Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 106/181] block: Reorder the request allocation code in blk_mq_submit_bio() Greg Kroah-Hartman
` (78 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Matthew Rosato, Niklas Schnelle,
Christian Borntraeger, Farhan Ali, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Matthew Rosato <mjrosato@linux.ibm.com>
[ Upstream commit 0cfe660559e857d7c00ab86c73e4510ce069086f ]
The current implementation of aisb calculation will erroneously index
via an unsigned long * as well as multiply by 8B for every 64-bits in
the offset; only one or the other is required. This throws off aisb
calculations once the number of devices exceeds 64, and can result
in out-of-bounds access as well as failure to indicate summary bits
associated with those devices in guests.
Fix this by converting to a physical address before applying the
offset, as is already done in arch/s390/pci/pci_irq.c.
Fixes: 3c5a1b6f0a18 ("KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
[alifm@linux.ibm.com: Resolved merge conflict]
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/kvm/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c
index 61489016e4252..d9fcbf41025e0 100644
--- a/arch/s390/kvm/pci.c
+++ b/arch/s390/kvm/pci.c
@@ -167,7 +167,7 @@ static int kvm_zpci_set_airq(struct zpci_dev *zdev)
fib.fmt0.noi = airq_iv_end(zdev->aibv);
fib.fmt0.aibv = virt_to_phys(zdev->aibv->vector);
fib.fmt0.aibvo = 0;
- fib.fmt0.aisb = virt_to_phys(aift->sbv->vector + (zdev->aisb / 64) * 8);
+ fib.fmt0.aisb = virt_to_phys(aift->sbv->vector) + (zdev->aisb / 64) * 8;
fib.fmt0.aisbo = zdev->aisb & 63;
fib.gd = zdev->gisa;
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 106/181] block: Reorder the request allocation code in blk_mq_submit_bio()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (104 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 105/181] KVM: s390: pci: Fix aisb calculation Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 107/181] blk-mq: pop cached request if it is usable Greg Kroah-Hartman
` (77 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Damien Le Moal, Christoph Hellwig,
Bart Van Assche, Chaitanya Kulkarni, Jens Axboe, Simon Liebold,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bart Van Assche <bvanassche@acm.org>
[ Upstream commit 44e41381591dc5b4ea67a9f170b4ec85c817586e ]
Help the CPU branch predictor in case of a cache hit by handling the cache
hit scenario first.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20241218212246.1073149-2-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: dc278e9bf2b9 ("blk-mq: pop cached request if it is usable")
Signed-off-by: Simon Liebold <simonlie@amazon.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
block/blk-mq.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5bfaa8e4b9cf6..c1dff0d9f9439 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3121,12 +3121,12 @@ void blk_mq_submit_bio(struct bio *bio)
}
new_request:
- if (!rq) {
+ if (rq) {
+ blk_mq_use_cached_rq(rq, plug, bio);
+ } else {
rq = blk_mq_get_new_requests(q, plug, bio, nr_segs);
if (unlikely(!rq))
goto queue_exit;
- } else {
- blk_mq_use_cached_rq(rq, plug, bio);
}
trace_block_getrq(bio);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 107/181] blk-mq: pop cached request if it is usable
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (105 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 106/181] block: Reorder the request allocation code in blk_mq_submit_bio() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 108/181] blk-mq: reinsert cached request to the list Greg Kroah-Hartman
` (76 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Keith Busch, Jens Axboe,
Simon Liebold, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Keith Busch <kbusch@kernel.org>
[ Upstream commit dc278e9bf2b9513a763353e6b9cc21e0f532954e ]
When submitting a bio to blk-mq, if the task should sleep after peeking
a cached request, but before it pops it, the plug flushes and calls
blk_mq_free_plug_rqs, freeing the cached_rqs. This creates a
use-after-free bug. Fix this by popping the cached request before any
possible blocking calls if it is suitable for use.
Popping this request first holds a queue reference, so avoid any
serialization races with queue freezes and can safely proceed with
dispatching that request to the driver. This potentially increases a
timing window from when a driver wants to freeze its queue to when
requests stop being dispatched. That scenario is off the fast path
though, and drivers need to appropriately handle requests during a
freeze request anyway.
The downside is the popped element needs to be individually freed when
we performed a bio plug merge. The cached request would have had to be
freed later anyway, but this patch does it inline with building the plug
list instead of after flushing it.
Fixes: b0077e269f6c1 ("blk-mq: make sure active queue usage is held for bio_integrity_prep()")
Fixes: 7b4f36cd22a65 ("block: ensure we hold a queue reference when using queue limits")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://patch.msgid.link/20260521190253.242065-1-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[ fix contextual conflicts ]
Signed-off-by: Simon Liebold <simonlie@amazon.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
block/blk-mq.c | 34 +++++++++-------------------------
1 file changed, 9 insertions(+), 25 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index c1dff0d9f9439..fd21976375ed4 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2989,7 +2989,7 @@ static struct request *blk_mq_get_new_requests(struct request_queue *q,
/*
* Check if there is a suitable cached request and return it.
*/
-static struct request *blk_mq_peek_cached_request(struct blk_plug *plug,
+static struct request *blk_mq_get_cached_request(struct blk_plug *plug,
struct request_queue *q, blk_opf_t opf)
{
enum hctx_type type = blk_mq_get_hctx_type(opf);
@@ -3005,27 +3005,10 @@ static struct request *blk_mq_peek_cached_request(struct blk_plug *plug,
return NULL;
if (op_is_flush(rq->cmd_flags) != op_is_flush(opf))
return NULL;
+ rq_list_pop(&plug->cached_rqs);
return rq;
}
-static void blk_mq_use_cached_rq(struct request *rq, struct blk_plug *plug,
- struct bio *bio)
-{
- if (rq_list_pop(&plug->cached_rqs) != rq)
- WARN_ON_ONCE(1);
-
- /*
- * If any qos ->throttle() end up blocking, we will have flushed the
- * plug and hence killed the cached_rq list as well. Pop this entry
- * before we throttle.
- */
- rq_qos_throttle(rq->q, bio);
-
- blk_mq_rq_time_init(rq, 0);
- rq->cmd_flags = bio->bi_opf;
- INIT_LIST_HEAD(&rq->queuelist);
-}
-
static bool bio_unaligned(const struct bio *bio, struct request_queue *q)
{
unsigned int bs_mask = queue_logical_block_size(q) - 1;
@@ -3063,7 +3046,7 @@ void blk_mq_submit_bio(struct bio *bio)
/*
* If the plug has a cached request for this queue, try to use it.
*/
- rq = blk_mq_peek_cached_request(plug, q, bio->bi_opf);
+ rq = blk_mq_get_cached_request(plug, q, bio->bi_opf);
/*
* A BIO that was released from a zone write plug has already been
@@ -3122,7 +3105,10 @@ void blk_mq_submit_bio(struct bio *bio)
new_request:
if (rq) {
- blk_mq_use_cached_rq(rq, plug, bio);
+ rq_qos_throttle(rq->q, bio);
+ blk_mq_rq_time_init(rq, blk_time_get_ns());
+ rq->cmd_flags = bio->bi_opf;
+ INIT_LIST_HEAD(&rq->queuelist);
} else {
rq = blk_mq_get_new_requests(q, plug, bio, nr_segs);
if (unlikely(!rq))
@@ -3165,12 +3151,10 @@ void blk_mq_submit_bio(struct bio *bio)
return;
queue_exit:
- /*
- * Don't drop the queue reference if we were trying to use a cached
- * request and thus didn't acquire one.
- */
if (!rq)
blk_queue_exit(q);
+ else
+ blk_mq_free_request(rq);
}
#ifdef CONFIG_BLK_MQ_STACKING
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 108/181] blk-mq: reinsert cached request to the list
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2026-08-17 13:33 ` [PATCH 6.12 107/181] blk-mq: pop cached request if it is usable Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 109/181] dt-bindings: crypto: qcom,ice: Fix missing power-domain and iface clk Greg Kroah-Hartman
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From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Ming Lei, Christoph Hellwig,
Keith Busch, Chaitanya Kulkarni, Jens Axboe, Simon Liebold,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Keith Busch <kbusch@kernel.org>
[ Upstream commit b051bb6bf0a231117036aa607cadf55be8e63910 ]
A previous commit removed an optimization out of caution for a scenario
that turns out not to be real: all the "queue_exit" goto's are safe to
reinsert the request into the cached_rq's plug list as they are either
from a non-blocking path, or a successful merge that already holds the
queue reference. This optimization is most needed for small sequential
workloads that successfully merge into larger requests.
Fixes: dc278e9bf2b9 ("blk-mq: pop cached request if it is usable")
Suggested-by: Ming Lei <tom.leiming@gmail.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://patch.msgid.link/20260526153531.2365935-1-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Simon Liebold <simonlie@amazon.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
block/blk-mq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index fd21976375ed4..6af42682af7d6 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3154,7 +3154,7 @@ void blk_mq_submit_bio(struct bio *bio)
if (!rq)
blk_queue_exit(q);
else
- blk_mq_free_request(rq);
+ rq_list_add_head(&plug->cached_rqs, rq);
}
#ifdef CONFIG_BLK_MQ_STACKING
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 109/181] dt-bindings: crypto: qcom,ice: Fix missing power-domain and iface clk
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@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 110/181] crypto: ccp - Add new SEV/SNP platform shutdown API Greg Kroah-Hartman
` (74 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kuldeep Singh, Krzysztof Kozlowski,
Harshal Dev, Bjorn Andersson, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Harshal Dev <harshal.dev@oss.qualcomm.com>
[ Upstream commit e27264daac7d9ce892a2a5b4a864d6d9a3c9276a ]
The DT bindings for inline-crypto engine do not specify the UFS_PHY_GDSC
power-domain and iface clock. Without enabling the iface clock and the
associated power-domain the ICE hardware cannot function correctly and
leads to unclocked hardware accesses being observed during probe.
Extend and fix the DT bindings for inline-crypto engine by allowing
description of the iface clock and UFS_PHY_GDSC power-domain.
This patch has been adapted from the mentioned upstream commit to drop
references to Eliza and Milos Qualcomm platforms which do not exist
on the stable tree. Thus, patch now fixes the original commit which
introduced the DT binding for Qualcomm inline-crypto engine.
Fixes: f6ff91a47ac5 ("dt-bindings: crypto: Add Qualcomm Inline Crypto Engine")
Reviewed-by: Kuldeep Singh <kuldeep.singh@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260416-qcom_ice_power_and_clk_vote-v5-1-5ccf5d7e2846@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../crypto/qcom,inline-crypto-engine.yaml | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/crypto/qcom,inline-crypto-engine.yaml b/Documentation/devicetree/bindings/crypto/qcom,inline-crypto-engine.yaml
index 0304f074cf085..2793afc7f85c4 100644
--- a/Documentation/devicetree/bindings/crypto/qcom,inline-crypto-engine.yaml
+++ b/Documentation/devicetree/bindings/crypto/qcom,inline-crypto-engine.yaml
@@ -25,6 +25,16 @@ properties:
maxItems: 1
clocks:
+ minItems: 1
+ maxItems: 2
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: core
+ - const: iface
+
+ power-domains:
maxItems: 1
required:
@@ -42,6 +52,10 @@ examples:
compatible = "qcom,sm8550-inline-crypto-engine",
"qcom,inline-crypto-engine";
reg = <0x01d88000 0x8000>;
- clocks = <&gcc GCC_UFS_PHY_ICE_CORE_CLK>;
+ clocks = <&gcc GCC_UFS_PHY_ICE_CORE_CLK>,
+ <&gcc GCC_UFS_PHY_AHB_CLK>;
+ clock-names = "core",
+ "iface";
+ power-domains = <&gcc UFS_PHY_GDSC>;
};
...
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 110/181] crypto: ccp - Add new SEV/SNP platform shutdown API
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` (108 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 109/181] dt-bindings: crypto: qcom,ice: Fix missing power-domain and iface clk Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 111/181] KVM: SVM: Add support to initialize SEV/SNP functionality in KVM Greg Kroah-Hartman
` (73 subsequent siblings)
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From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Dionna Glaze, Tom Lendacky,
Ashish Kalra, Herbert Xu, Jack Wang, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ashish Kalra <ashish.kalra@amd.com>
commit f7b86e0e75bc234751cb7a82d888083a57ef28b2 upstream.
Add new API interface to do SEV/SNP platform shutdown when KVM module
is unloaded.
Reviewed-by: Dionna Glaze <dionnaglaze@google.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/crypto/ccp/sev-dev.c | 9 +++++++++
include/linux/psp-sev.h | 3 +++
2 files changed, 12 insertions(+)
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index d668f9318c286..7c05cae7e5778 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -2444,6 +2444,15 @@ static void sev_firmware_shutdown(struct sev_device *sev)
mutex_unlock(&sev_cmd_mutex);
}
+void sev_platform_shutdown(void)
+{
+ if (!psp_master || !psp_master->sev_data)
+ return;
+
+ sev_firmware_shutdown(psp_master->sev_data);
+}
+EXPORT_SYMBOL_GPL(sev_platform_shutdown);
+
void sev_dev_destroy(struct psp_device *psp)
{
struct sev_device *sev = psp->sev_data;
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
index 613a8209bed27..6a4435cfa977e 100644
--- a/include/linux/psp-sev.h
+++ b/include/linux/psp-sev.h
@@ -947,6 +947,7 @@ int sev_do_cmd(int cmd, void *data, int *psp_ret);
void *psp_copy_user_blob(u64 uaddr, u32 len);
void *snp_alloc_firmware_page(gfp_t mask);
void snp_free_firmware_page(void *addr);
+void sev_platform_shutdown(void);
#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
@@ -981,6 +982,8 @@ static inline void *snp_alloc_firmware_page(gfp_t mask)
static inline void snp_free_firmware_page(void *addr) { }
+static inline void sev_platform_shutdown(void) { }
+
#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
#endif /* __PSP_SEV_H__ */
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 111/181] KVM: SVM: Add support to initialize SEV/SNP functionality in KVM
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` (109 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 110/181] crypto: ccp - Add new SEV/SNP platform shutdown API Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 112/181] crypto: ccp - Fix checks for SNP_VLEK_LOAD input buffer length Greg Kroah-Hartman
` (72 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sean Christopherson, Tom Lendacky,
Ashish Kalra, Herbert Xu, Jack Wang, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ashish Kalra <ashish.kalra@amd.com>
commit 6f1d5a3513c2370bbd6115dd430906bc2f4bdc53 upstream.
Move platform initialization of SEV/SNP from CCP driver probe time to
KVM module load time so that KVM can do SEV/SNP platform initialization
explicitly if it actually wants to use SEV/SNP functionality.
Add support for KVM to explicitly call into the CCP driver at load time
to initialize SEV/SNP. If required, this behavior can be altered with KVM
module parameters to not do SEV/SNP platform initialization at module load
time. Additionally, a corresponding SEV/SNP platform shutdown is invoked
during KVM module unload time.
Continue to support SEV deferred initialization as the user may have the
file containing SEV persistent data for SEV INIT_EX available only later
after module load/init.
Suggested-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/kvm/svm/sev.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 6cec696461da2..bd0344bacaf1e 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2972,6 +2972,7 @@ void __init sev_set_cpu_caps(void)
void __init sev_hardware_setup(void)
{
unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count;
+ struct sev_platform_init_args init_args = {0};
bool sev_snp_supported = false;
bool sev_es_supported = false;
bool sev_supported = false;
@@ -3088,6 +3089,15 @@ void __init sev_hardware_setup(void)
sev_supported_vmsa_features = 0;
if (sev_es_debug_swap_enabled)
sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP;
+
+ if (!sev_enabled)
+ return;
+
+ /*
+ * Do both SNP and SEV initialization at KVM module load.
+ */
+ init_args.probe = true;
+ sev_platform_init(&init_args);
}
void sev_hardware_unsetup(void)
@@ -3103,6 +3113,8 @@ void sev_hardware_unsetup(void)
misc_cg_set_capacity(MISC_CG_RES_SEV, 0);
misc_cg_set_capacity(MISC_CG_RES_SEV_ES, 0);
+
+ sev_platform_shutdown();
}
int sev_cpu_init(struct svm_cpu_data *sd)
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 112/181] crypto: ccp - Fix checks for SNP_VLEK_LOAD input buffer length
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@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 113/181] crypto: ccp - Abort doing SEV INIT if SNP INIT fails Greg Kroah-Hartman
` (71 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Diego GonzalezVillalobos,
Michael Roth, Herbert Xu, Jack Wang, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Roth <michael.roth@amd.com>
commit ed53a5050f42a3243a7ed8dfa49030e54034b952 upstream.
The SNP_VLEK_LOAD IOCTL currently fails due to sev_cmd_buffer_len()
returning the default expected buffer length of 0 instead of the correct
value, which would be sizeof(struct sev_user_data_snp_vlek_load). Add
specific handling for SNP_VLEK_LOAD so the correct expected size is
returned.
Reported-by: Diego GonzalezVillalobos <Diego.GonzalezVillalobos@amd.com>
Cc: Diego GonzalezVillalobos <Diego.GonzalezVillalobos@amd.com>
Fixes: 332d2c1d713e ("crypto: ccp: Add the SNP_VLEK_LOAD command")
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
[Jack: sev_cmd_buffer_len() in queue/6.12 does not yet have the
SEV_CMD_SNP_FEATURE_INFO case the upstream context line matched
against (it lands in a later, unrelated commit not queued here),
so the new SEV_CMD_SNP_VLEK_LOAD case was placed directly after
SEV_CMD_SNP_COMMIT instead. No functional difference from upstream.]
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/crypto/ccp/sev-dev.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 7c05cae7e5778..6e08378eb5fac 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -226,6 +226,7 @@ static int sev_cmd_buffer_len(int cmd)
case SEV_CMD_SNP_GUEST_REQUEST: return sizeof(struct sev_data_snp_guest_request);
case SEV_CMD_SNP_CONFIG: return sizeof(struct sev_user_data_snp_config);
case SEV_CMD_SNP_COMMIT: return sizeof(struct sev_data_snp_commit);
+ case SEV_CMD_SNP_VLEK_LOAD: return sizeof(struct sev_user_data_snp_vlek_load);
default: return 0;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 113/181] crypto: ccp - Abort doing SEV INIT if SNP INIT fails
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` (111 preceding siblings ...)
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@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 114/181] futex: Prevent robust futex exit race some more Greg Kroah-Hartman
` (70 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Ashish Kalra, Herbert Xu, Jack Wang,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ashish Kalra <ashish.kalra@amd.com>
commit 6131e119f5799bec55535530fa2fc44f5c7be1f1 upstream.
If SNP host support (SYSCFG.SNPEn) is set, then the RMP table must
be initialized before calling SEV INIT.
In other words, if SNP_INIT(_EX) is not issued or fails then
SEV INIT will fail if SNP host support (SYSCFG.SNPEn) is enabled.
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/crypto/ccp/sev-dev.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 6e08378eb5fac..d6a0773d6da8f 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -1118,7 +1118,7 @@ static int __sev_snp_init_locked(int *error)
if (!sev_version_greater_or_equal(SNP_MIN_API_MAJOR, SNP_MIN_API_MINOR)) {
dev_dbg(sev->dev, "SEV-SNP support requires firmware version >= %d:%d\n",
SNP_MIN_API_MAJOR, SNP_MIN_API_MINOR);
- return 0;
+ return -EOPNOTSUPP;
}
/* SNP_INIT requires MSR_VM_HSAVE_PA to be cleared on all CPUs. */
@@ -1357,12 +1357,9 @@ static int _sev_platform_init_locked(struct sev_platform_init_args *args)
rc = __sev_snp_init_locked(&args->error);
if (rc && rc != -ENODEV) {
- /*
- * Don't abort the probe if SNP INIT failed,
- * continue to initialize the legacy SEV firmware.
- */
dev_err(sev->dev, "SEV-SNP: failed to INIT rc %d, error %#x\n",
rc, args->error);
+ return rc;
}
/* Defer legacy SEV/SEV-ES support if allowed by caller/module. */
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 114/181] futex: Prevent robust futex exit race some more
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@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 115/181] kunit/fortify: Replace "volatile" with OPTIMIZER_HIDE_VAR() Greg Kroah-Hartman
` (69 subsequent siblings)
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From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Keno Fischer, Thomas Gleixner,
Ingo Molnar, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Keno Fischer <keno@juliacomputing.com>
commit 6d4514ca9cdf61fec4ec634cf50386f6f7e69748 upstream.
A robust futex unlock stores 0 over the whole futex value - wiping
FUTEX_WAITERS - and wakes a single waiter. That wakeup is a one-shot
notification: the protocol relies on its recipient to either acquire the
futex (and eventually unlock while aware of the remaining contention) or
re-arm FUTEX_WAITERS before sleeping again. If the woken waiter is killed
before it can do either, the kernel must jump in and wake the next task
down the line.
This is a known complication of the futex protocol with a previous
partial fix in commit ca16d5bee598 ("futex: Prevent robust futex exit
race"). Unfortunately, that fix is insufficient.
If a third task re-acquired the futex through the uncontended fast
path in the meantime, the notification is lost: robust exit processing
sees that it is owned by another task and does nothing, while the new
owner sees no FUTEX_WAITERS when it unlocks and wakes nobody.
The remaining waiters sleep forever behind a free futex:
A owns the futex, B and C sleep in FUTEX_WAIT
uval == A | FUTEX_WAITERS
A robust unlock: store 0, FUTEX_WAKE(1) wakes B
uval == 0
D fast path acquire: cmpxchg(0 -> D)
uval == D, no FUTEX_WAITERS
B killed before acting on the wakeup
B exit walk, pending op: owner D != B -> no action
D unlock: no FUTEX_WAITERS -> no wake
C sleeps forever
This is clearly a shortcoming in the implementation, which fails to keep
the FUTEX_WAITERS bit consistent.
Work around this by augmenting the robust list exit processing to also
perform the extra wakeup if the futex word is owned by another thread but
FUTEX_WAITERS is not set.
This does not fix the problem of a non-contended take over/release and free
sequence, which has been discussed for years and has been addressed by
commit 3ca9595d9fb6 ("futex: Add support for unlocking robust futexes") and
subsequent changes, but failed to take the problem described above into
account.
A more complete solution which is based on the in kernel unlock of
contended robust futexes has been discussed in the context of this change
and should show up in mainline sooner than later.
[ tglx: Amend change log slightly and fixup coding style ]
Fixes: ca16d5bee598 ("futex: Prevent robust futex exit race")
Signed-off-by: Keno Fischer <keno@juliahub.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Assisted-by: ClaudeCode:claude-fable-5 tla+
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260730194705.38981-1-keno@juliacomputing.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/futex/core.c | 85 +++++++++++++++++++++++++++++++--------------
1 file changed, 58 insertions(+), 27 deletions(-)
diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 010607a991949..c37d2263c21fe 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -674,8 +674,11 @@ static int handle_futex_death(u32 __user *uaddr, struct task_struct *curr,
return -1;
/*
- * Special case for regular (non PI) futexes. The unlock path in
- * user space has two race scenarios:
+ * Special case for regular (non PI) futexes. Ordinarily, we do
+ * not perform any processing here unless the current thread was
+ * the owner of the futex (by the TID check below).
+ *
+ * However, the unlock path has three race scenarios:
*
* 1. The unlock path releases the user space futex value and
* before it can execute the futex() syscall to wake up
@@ -684,42 +687,70 @@ static int handle_futex_death(u32 __user *uaddr, struct task_struct *curr,
* 2. A woken up waiter is killed before it can acquire the
* futex in user space.
*
- * In the second case, the wake up notification could be generated
- * by the unlock path in user space after setting the futex value
- * to zero or by the kernel after setting the OWNER_DIED bit below.
+ * 3. A woken up waiter is killed in user space after another
+ * thread has acquired the futex, but before it can set
+ * FUTEX_WAITERS.
+ *
+ * Note that, if userspace uses the FUTEX_ROBUST_UNLOCK flag, we
+ * will not see case 1 here.
+ *
+ * In the second and third case, the wake up notification could
+ * be generated from any of:
+ *
+ * i. An ordinary futex wakeup after unlock (with or
+ * without FUTEX_ROBUST_UNLOCK)
+ * ii. A robust wakeup from another thread's death
+ * iii. A previous round through this special case
+ *
+ * As a result, the futex world will be in one of four states:
+ *
+ * A. The futex word is 0 (unlocked)
+ * B. The futex word is owned by another thread
+ * (FUTEX_WAITERS is not set)
+ * C. The futex word is owned by another thread
+ * (FUTEX_WAITERS set)
+ * D. The futex's owner died and OWNER_DIED is set
+ * (the owner part of the word is 0)
*
- * In both cases the TID validation below prevents a wakeup of
- * potential waiters which can cause these waiters to block
- * forever.
+ * The key issue is that the kernel usually (at least from
+ * sources ii. and iii. or when so requested by userspace from
+ * source i.) only ever wakes *one* waiter at a time. If this
+ * waiter dies before acquiring the futex (or setting the
+ * FUTEX_WAITERS bit), the kernel *must* still wake the next
+ * waiter down the line to uphold the futex invariants and
+ * avoid lost wakeups. Note we do not need to handle state C,
+ * as it does not matter to us whether *we* successfully set
+ * the bit or a third thread did so in the meantime.
*
- * In both cases the following conditions are met:
+ * Therefore, in these cases we must issue an additional
+ * futex_wake(). Note however that we *must not* set OWNER_DIED
+ * here. Our thread is *not* the owner of the futex.
*
- * 1) task->robust_list->list_op_pending != NULL
- * @pending_op == true
- * 2) The owner part of user space futex value == 0
+ * Thus to summarize, the conditions for needing the additional
+ * futex_wake() are:
+ *
+ * 1) @pending_op == true (the thread has not finished the
+ * mutex operation)
+ * 2) The futex word is in one of the states A, B or D
* 3) Regular futex: @pi == false
*
- * If these conditions are met, it is safe to attempt waking up a
- * potential waiter without touching the user space futex value and
- * trying to set the OWNER_DIED bit. If the futex value is zero,
- * the rest of the user space mutex state is consistent, so a woken
- * waiter will just take over the uncontended futex. Setting the
- * OWNER_DIED bit would create inconsistent state and malfunction
- * of the user space owner died handling. Otherwise, the OWNER_DIED
- * bit is already set, and the woken waiter is expected to deal with
- * this.
+ * Note in particular that in all of the states A-D the owner
+ * portion of the futex word differs from our thread's TID
+ * (unless the actual owner has the same TID in another PID
+ * namespace, but we cannot currently distinguish that
+ * scenario), so this can be a special-case wakeup in the bail
+ * path of the ordinary TID check.
*/
owner = uval & FUTEX_TID_MASK;
- if (pending_op && !pi && !owner) {
- futex_wake(uaddr, FLAGS_SIZE_32 | FLAGS_SHARED, 1,
- FUTEX_BITSET_MATCH_ANY);
+ if (owner != task_pid_vnr(curr)) {
+ if (pending_op && !pi && (!owner || !(uval & FUTEX_WAITERS))) {
+ futex_wake(uaddr, FLAGS_SIZE_32 | FLAGS_SHARED, 1,
+ FUTEX_BITSET_MATCH_ANY);
+ }
return 0;
}
- if (owner != task_pid_vnr(curr))
- return 0;
-
/*
* Ok, this dying thread is truly holding a futex
* of interest. Set the OWNER_DIED bit atomically
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 115/181] kunit/fortify: Replace "volatile" with OPTIMIZER_HIDE_VAR()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (113 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 114/181] futex: Prevent robust futex exit race some more Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 116/181] kunit/fortify: Add back "volatile" for sizeof() constants Greg Kroah-Hartman
` (68 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Nathan Chancellor, Kees Cook,
Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kees Cook <kees@kernel.org>
commit 6ee149f61bcce39692f0335a01e99355d4cec8da upstream.
It does seem that using "volatile" isn't going to be sane compared to
using OPTIMIZER_HIDE_VAR() going forward. Some strange interactions[1]
with the sanitizers have been observed in the self-test code, so replace
the logic.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://github.com/ClangBuiltLinux/linux/issues/2075 [1]
Link: https://lore.kernel.org/r/20250312000439.work.112-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
lib/fortify_kunit.c | 139 ++++++++++++++++++++++++--------------------
1 file changed, 77 insertions(+), 62 deletions(-)
diff --git a/lib/fortify_kunit.c b/lib/fortify_kunit.c
index ecb638d4cde1e..1541b2a1694e4 100644
--- a/lib/fortify_kunit.c
+++ b/lib/fortify_kunit.c
@@ -394,8 +394,6 @@ struct fortify_padding {
char buf[32];
unsigned long bytes_after;
};
-/* Force compiler into not being able to resolve size at compile-time. */
-static volatile int unconst;
static void fortify_test_strlen(struct kunit *test)
{
@@ -520,57 +518,56 @@ static void fortify_test_strncpy(struct kunit *test)
{
struct fortify_padding pad = { };
char src[] = "Copy me fully into a small buffer and I will overflow!";
+ size_t sizeof_buf = sizeof(pad.buf);
+
+ OPTIMIZER_HIDE_VAR(sizeof_buf);
/* Destination is %NUL-filled to start with. */
KUNIT_EXPECT_EQ(test, pad.bytes_before, 0);
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 3], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 3], '\0');
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
/* Legitimate strncpy() 1 less than of max size. */
- KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src,
- sizeof(pad.buf) + unconst - 1)
+ KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src, sizeof_buf - 1)
== pad.buf);
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0);
/* Only last byte should be %NUL */
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 3], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 3], '\0');
/* Legitimate (though unterminated) max-size strncpy. */
- KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src,
- sizeof(pad.buf) + unconst)
+ KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src, sizeof_buf)
== pad.buf);
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0);
/* No trailing %NUL -- thanks strncpy API. */
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
/* But we will not have gone beyond. */
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
/* Now verify that FORTIFY is working... */
- KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src,
- sizeof(pad.buf) + unconst + 1)
+ KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src, sizeof_buf + 1)
== pad.buf);
/* Should catch the overflow. */
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 1);
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
/* And we will not have gone beyond. */
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
/* And further... */
- KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src,
- sizeof(pad.buf) + unconst + 2)
+ KUNIT_ASSERT_TRUE(test, strncpy(pad.buf, src, sizeof_buf + 2)
== pad.buf);
/* Should catch the overflow. */
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 2);
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
/* And we will not have gone beyond. */
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
}
@@ -579,55 +576,56 @@ static void fortify_test_strscpy(struct kunit *test)
{
struct fortify_padding pad = { };
char src[] = "Copy me fully into a small buffer and I will overflow!";
+ size_t sizeof_buf = sizeof(pad.buf);
+ size_t sizeof_src = sizeof(src);
+
+ OPTIMIZER_HIDE_VAR(sizeof_buf);
+ OPTIMIZER_HIDE_VAR(sizeof_src);
/* Destination is %NUL-filled to start with. */
KUNIT_EXPECT_EQ(test, pad.bytes_before, 0);
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 3], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 3], '\0');
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
/* Legitimate strscpy() 1 less than of max size. */
- KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src,
- sizeof(pad.buf) + unconst - 1),
+ KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src, sizeof_buf - 1),
-E2BIG);
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0);
/* Keeping space for %NUL, last two bytes should be %NUL */
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 3], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 3], '\0');
/* Legitimate max-size strscpy. */
- KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src,
- sizeof(pad.buf) + unconst),
+ KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src, sizeof_buf),
-E2BIG);
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0);
/* A trailing %NUL will exist. */
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
/* Now verify that FORTIFY is working... */
- KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src,
- sizeof(pad.buf) + unconst + 1),
+ KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src, sizeof_buf + 1),
-E2BIG);
/* Should catch the overflow. */
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 1);
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
/* And we will not have gone beyond. */
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
/* And much further... */
- KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src,
- sizeof(src) * 2 + unconst),
+ KUNIT_ASSERT_EQ(test, strscpy(pad.buf, src, sizeof_src * 2),
-E2BIG);
/* Should catch the overflow. */
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 2);
- KUNIT_EXPECT_EQ(test, pad.buf[sizeof(pad.buf) - 1], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
- KUNIT_EXPECT_NE(test, pad.buf[sizeof(pad.buf) - 2], '\0');
+ KUNIT_EXPECT_EQ(test, pad.buf[sizeof_buf - 1], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
+ KUNIT_EXPECT_NE(test, pad.buf[sizeof_buf - 2], '\0');
/* And we will not have gone beyond. */
KUNIT_EXPECT_EQ(test, pad.bytes_after, 0);
}
@@ -767,7 +765,9 @@ static void fortify_test_strlcat(struct kunit *test)
struct fortify_padding pad = { };
char src[sizeof(pad.buf)] = { };
int i, partial;
- int len = sizeof(pad.buf) + unconst;
+ int len = sizeof(pad.buf);
+
+ OPTIMIZER_HIDE_VAR(len);
/* Fill 15 bytes with valid characters. */
partial = sizeof(src) / 2 - 1;
@@ -857,28 +857,32 @@ struct fortify_zero_sized {
#define __fortify_test(memfunc) \
static void fortify_test_##memfunc(struct kunit *test) \
{ \
- struct fortify_zero_sized zero = { }; \
+ struct fortify_zero_sized empty = { }; \
struct fortify_padding pad = { }; \
char srcA[sizeof(pad.buf) + 2]; \
char srcB[sizeof(pad.buf) + 2]; \
- size_t len = sizeof(pad.buf) + unconst; \
+ size_t len = sizeof(pad.buf); \
+ size_t zero = 0; \
+ \
+ OPTIMIZER_HIDE_VAR(len); \
+ OPTIMIZER_HIDE_VAR(zero); \
\
memset(srcA, 'A', sizeof(srcA)); \
KUNIT_ASSERT_EQ(test, srcA[0], 'A'); \
memset(srcB, 'B', sizeof(srcB)); \
KUNIT_ASSERT_EQ(test, srcB[0], 'B'); \
\
- memfunc(pad.buf, srcA, 0 + unconst); \
+ memfunc(pad.buf, srcA, zero); \
KUNIT_EXPECT_EQ(test, pad.buf[0], '\0'); \
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0); \
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0); \
- memfunc(pad.buf + 1, srcB, 1 + unconst); \
+ memfunc(pad.buf + 1, srcB, zero + 1); \
KUNIT_EXPECT_EQ(test, pad.buf[0], '\0'); \
KUNIT_EXPECT_EQ(test, pad.buf[1], 'B'); \
KUNIT_EXPECT_EQ(test, pad.buf[2], '\0'); \
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0); \
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0); \
- memfunc(pad.buf, srcA, 1 + unconst); \
+ memfunc(pad.buf, srcA, zero + 1); \
KUNIT_EXPECT_EQ(test, pad.buf[0], 'A'); \
KUNIT_EXPECT_EQ(test, pad.buf[1], 'B'); \
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0); \
@@ -904,10 +908,10 @@ static void fortify_test_##memfunc(struct kunit *test) \
/* Reset error counter. */ \
fortify_write_overflows = 0; \
/* Copy nothing into nothing: no errors. */ \
- memfunc(zero.buf, srcB, 0 + unconst); \
+ memfunc(empty.buf, srcB, zero); \
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0); \
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 0); \
- memfunc(zero.buf, srcB, 1 + unconst); \
+ memfunc(empty.buf, srcB, zero + 1); \
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0); \
KUNIT_EXPECT_EQ(test, fortify_write_overflows, 1); \
}
@@ -919,7 +923,9 @@ static void fortify_test_memscan(struct kunit *test)
char haystack[] = "Where oh where is my memory range?";
char *mem = haystack + strlen("Where oh where is ");
char needle = 'm';
- size_t len = sizeof(haystack) + unconst;
+ size_t len = sizeof(haystack);
+
+ OPTIMIZER_HIDE_VAR(len);
KUNIT_ASSERT_PTR_EQ(test, memscan(haystack, needle, len),
mem);
@@ -938,7 +944,9 @@ static void fortify_test_memchr(struct kunit *test)
char haystack[] = "Where oh where is my memory range?";
char *mem = haystack + strlen("Where oh where is ");
char needle = 'm';
- size_t len = sizeof(haystack) + unconst;
+ size_t len = sizeof(haystack);
+
+ OPTIMIZER_HIDE_VAR(len);
KUNIT_ASSERT_PTR_EQ(test, memchr(haystack, needle, len),
mem);
@@ -957,7 +965,9 @@ static void fortify_test_memchr_inv(struct kunit *test)
char haystack[] = "Where oh where is my memory range?";
char *mem = haystack + 1;
char needle = 'W';
- size_t len = sizeof(haystack) + unconst;
+ size_t len = sizeof(haystack);
+
+ OPTIMIZER_HIDE_VAR(len);
/* Normal search is okay. */
KUNIT_ASSERT_PTR_EQ(test, memchr_inv(haystack, needle, len),
@@ -976,8 +986,11 @@ static void fortify_test_memcmp(struct kunit *test)
{
char one[] = "My mind is going ...";
char two[] = "My mind is going ... I can feel it.";
- size_t one_len = sizeof(one) + unconst - 1;
- size_t two_len = sizeof(two) + unconst - 1;
+ size_t one_len = sizeof(one) - 1;
+ size_t two_len = sizeof(two) - 1;
+
+ OPTIMIZER_HIDE_VAR(one_len);
+ OPTIMIZER_HIDE_VAR(two_len);
/* We match the first string (ignoring the %NUL). */
KUNIT_ASSERT_EQ(test, memcmp(one, two, one_len), 0);
@@ -998,7 +1011,9 @@ static void fortify_test_kmemdup(struct kunit *test)
{
char src[] = "I got Doom running on it!";
char *copy;
- size_t len = sizeof(src) + unconst;
+ size_t len = sizeof(src);
+
+ OPTIMIZER_HIDE_VAR(len);
/* Copy is within bounds. */
copy = kmemdup(src, len, GFP_KERNEL);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 116/181] kunit/fortify: Add back "volatile" for sizeof() constants
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (114 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 115/181] kunit/fortify: Replace "volatile" with OPTIMIZER_HIDE_VAR() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 117/181] pinctrl: renesas: rzg2l: Use -ENOTSUPP instead of -EOPNOTSUPP Greg Kroah-Hartman
` (67 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Nathan Chancellor,
Jannik Glückert, Kees Cook, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kees Cook <kees@kernel.org>
commit 10299c07c94aa0997fa43523b53301e713a6415d upstream.
It seems the Clang can see through OPTIMIZER_HIDE_VAR when the constant
is coming from sizeof. Adding "volatile" back to these variables solves
this false positive without reintroducing the issues that originally led
to switching to OPTIMIZER_HIDE_VAR in the first place[1].
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://github.com/ClangBuiltLinux/linux/issues/2075 [1]
Cc: Jannik Glückert <jannik.glueckert@gmail.com>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Fixes: 6ee149f61bcc ("kunit/fortify: Replace "volatile" with OPTIMIZER_HIDE_VAR()")
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250628234034.work.800-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
lib/fortify_kunit.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/fortify_kunit.c b/lib/fortify_kunit.c
index 1541b2a1694e4..d0810e4e65e5b 100644
--- a/lib/fortify_kunit.c
+++ b/lib/fortify_kunit.c
@@ -986,8 +986,8 @@ static void fortify_test_memcmp(struct kunit *test)
{
char one[] = "My mind is going ...";
char two[] = "My mind is going ... I can feel it.";
- size_t one_len = sizeof(one) - 1;
- size_t two_len = sizeof(two) - 1;
+ volatile size_t one_len = sizeof(one) - 1;
+ volatile size_t two_len = sizeof(two) - 1;
OPTIMIZER_HIDE_VAR(one_len);
OPTIMIZER_HIDE_VAR(two_len);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 117/181] pinctrl: renesas: rzg2l: Use -ENOTSUPP instead of -EOPNOTSUPP
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (115 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 116/181] kunit/fortify: Add back "volatile" for sizeof() constants Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 118/181] selftests/bpf: Ensure UDP sockets are bound Greg Kroah-Hartman
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183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Claudiu Beznea, Bartosz Golaszewski,
Geert Uytterhoeven, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
commit c1492da3939c89372929e062d731f328f7693f1e upstream.
The pinctrl and GPIO core code make exceptions for the -ENOTSUPP error
code. One such example is gpio_set_config_with_argument_optional(),
which returns success when gpio_set_config_with_argument() returns
-ENOTSUPP, but reports failure for all other error codes.
Returning -EOPNOTSUPP from the pinctrl driver on the unsupported pinctrl
operation may lead to boot failures when pinctrl drivers implements
struct gpio_chip::set_config, the system uses GPIO hogs, and the
struct gpio_chip::set_config implementation returns -EOPNOTSUPP for the
unsupported operations.
Return -ENOTSUPP for the unsupported pinctrl operation.
Fixes: 560c633d378a ("pinctrl: renesas: rzg2l: Drop oen_read and oen_write callbacks")
Fixes: c4c4637eb57f ("pinctrl: renesas: Add RZ/G2L pin and gpio controller driver")
Cc: stable@vger.kernel.org
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260515124008.2947838-2-claudiu.beznea@kernel.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[claudiu.beznea: fixed conflict by keeping the code v6.12 stable]
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pinctrl/renesas/pinctrl-rzg2l.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 17e27879fd623..6fd79907f17e9 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -1478,7 +1478,7 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
break;
default:
- return -EOPNOTSUPP;
+ return -ENOTSUPP;
}
}
@@ -1560,7 +1560,7 @@ static int rzg2l_pinctrl_pinconf_group_get(struct pinctrl_dev *pctldev,
/* Check config matching between to pin */
if (i && prev_config != *config)
- return -EOPNOTSUPP;
+ return -ENOTSUPP;
prev_config = *config;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 118/181] selftests/bpf: Ensure UDP sockets are bound
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (116 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 117/181] pinctrl: renesas: rzg2l: Use -ENOTSUPP instead of -EOPNOTSUPP Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 119/181] selftests/bpf: Adapt sockmap update error handling Greg Kroah-Hartman
` (65 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Michal Luczaj, Kuniyuki Iwashima,
Jakub Sitnicki, Kumar Kartikeya Dwivedi, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michal Luczaj <mhal@rbox.co>
[ Upstream commit fe3ff273767ef22fe8a7cb3816f264927c190e50 ]
Update sockmap_basic tests to bind sockets before they are used. This
accommodates the recent change in sockmap that rejects unbound UDP sockets.
Signed-off-by: Michal Luczaj <mhal@rbox.co>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20260707-sockmap-lookup-udp-leak-v4-1-f878346f27ab@rbox.co
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/bpf/prog_tests/sockmap_basic.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
index fb08c565d6aad..99522cf68dc8c 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
@@ -703,7 +703,7 @@ static void test_sockmap_many_socket(void)
return;
}
- udp = xsocket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, 0);
+ udp = socket_loopback(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK);
if (udp < 0) {
close(dgram);
close(tcp);
@@ -772,7 +772,7 @@ static void test_sockmap_many_maps(void)
return;
}
- udp = xsocket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, 0);
+ udp = socket_loopback(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK);
if (udp < 0) {
close(dgram);
close(tcp);
@@ -843,7 +843,7 @@ static void test_sockmap_same_sock(void)
return;
}
- udp = xsocket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, 0);
+ udp = socket_loopback(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK);
if (udp < 0) {
close(dgram);
close(tcp);
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 119/181] selftests/bpf: Adapt sockmap update error handling
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (117 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 118/181] selftests/bpf: Ensure UDP sockets are bound Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 120/181] ipv4: Fix fib_nlmsg_size() for RTA_VIA nexthops Greg Kroah-Hartman
` (64 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Michal Luczaj, Kuniyuki Iwashima,
Jakub Sitnicki, Kumar Kartikeya Dwivedi, Sasha Levin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michal Luczaj <mhal@rbox.co>
[ Upstream commit 30581eda4a07ff15db623612cac578e81869e96f ]
Update sockmap_listen to accommodate the recent change in sockmap that
rejects unbound UDP sockets.
TCP: Reject unbound and bound (unless established or listening).
UDP: Accept only bound sockets.
While at it, migrate to ASSERT_* and enforce reverse xmas tree.
Signed-off-by: Michal Luczaj <mhal@rbox.co>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20260707-sockmap-lookup-udp-leak-v4-3-f878346f27ab@rbox.co
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../selftests/bpf/prog_tests/sockmap_listen.c | 21 ++++++++++---------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
index 1cfed83156b03..b04b8188b1514 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
@@ -53,8 +53,8 @@ static void test_insert_opened(struct test_sockmap_listen *skel __always_unused,
int family, int sotype, int mapfd)
{
u32 key = 0;
- u64 value;
int err, s;
+ u64 value;
s = xsocket(family, sotype, 0);
if (s == -1)
@@ -63,11 +63,8 @@ static void test_insert_opened(struct test_sockmap_listen *skel __always_unused,
errno = 0;
value = s;
err = bpf_map_update_elem(mapfd, &key, &value, BPF_NOEXIST);
- if (sotype == SOCK_STREAM) {
- if (!err || errno != EOPNOTSUPP)
- FAIL_ERRNO("map_update: expected EOPNOTSUPP");
- } else if (err)
- FAIL_ERRNO("map_update: expected success");
+ ASSERT_ERR(err, "map_update");
+ ASSERT_EQ(errno, EOPNOTSUPP, "errno");
xclose(s);
}
@@ -77,8 +74,8 @@ static void test_insert_bound(struct test_sockmap_listen *skel __always_unused,
struct sockaddr_storage addr;
socklen_t len = 0;
u32 key = 0;
- u64 value;
int err, s;
+ u64 value;
init_addr_loopback(family, &addr, &len);
@@ -93,8 +90,12 @@ static void test_insert_bound(struct test_sockmap_listen *skel __always_unused,
errno = 0;
value = s;
err = bpf_map_update_elem(mapfd, &key, &value, BPF_NOEXIST);
- if (!err || errno != EOPNOTSUPP)
- FAIL_ERRNO("map_update: expected EOPNOTSUPP");
+ if (sotype == SOCK_STREAM) {
+ ASSERT_ERR(err, "map_update");
+ ASSERT_EQ(errno, EOPNOTSUPP, "errno");
+ } else {
+ ASSERT_OK(err, "map_update");
+ }
close:
xclose(s);
}
@@ -1289,7 +1290,7 @@ static void test_ops(struct test_sockmap_listen *skel, struct bpf_map *map,
/* insert */
TEST(test_insert_invalid),
TEST(test_insert_opened),
- TEST(test_insert_bound, SOCK_STREAM),
+ TEST(test_insert_bound),
TEST(test_insert),
/* delete */
TEST(test_delete_after_insert),
--
2.53.0
^ permalink raw reply related [flat|nested] 185+ messages in thread* [PATCH 6.12 120/181] ipv4: Fix fib_nlmsg_size() for RTA_VIA nexthops
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (118 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 119/181] selftests/bpf: Adapt sockmap update error handling Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 121/181] ipv4: fix use-after-free in fib_nhc_update_mtu() Greg Kroah-Hartman
` (63 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zihan Xi, Ido Schimmel,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <zihanx@nebusec.ai>
commit 4ff9548d84945d2cbf9e4c207288063a200ea397 upstream.
fib_nlmsg_size() still estimates nexthop space as if every gateway is
encoded as an IPv4 RTA_GATEWAY attribute. IPv4 routes can also carry an
IPv6 gateway, which fib_nexthop_info() dumps as RTA_VIA.
As a result, route notifications can allocate an skb that is too small.
fib_dump_info() then fails with -EMSGSIZE and rtmsg_fib() hits the
WARN_ON() that marks such failures as a fib_nlmsg_size() bug. With
panic_on_warn set, this becomes a kernel panic.
Mirror the actual nexthop dump layout in fib_nlmsg_size(): account for
IPv6 nexthop gateways dumped as RTA_VIA, for the no-header rtnexthop
layout used inside RTA_MULTIPATH, and for RTA_FLOW only when it is
actually present.
Fixes: d15662682db2 ("ipv4: Allow ipv6 gateway with ipv4 routes")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zihan Xi <zihanx@nebusec.ai>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/6f53fa797fcaeb26966432ed7ae9bb87c4961f37.1785411220.git.zihanx@nebusec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/fib_semantics.c | 67 ++++++++++++++++++++++++++++++++++-------------
1 file changed, 49 insertions(+), 18 deletions(-)
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -462,6 +462,34 @@ int ip_fib_check_default(__be32 gw, stru
return -1;
}
+static size_t fib_nexthop_nlmsg_size(const struct fib_nh_common *nhc,
+ bool skip_oif)
+{
+ size_t nhsize = 0;
+
+ switch (nhc->nhc_gw_family) {
+ case AF_INET:
+ nhsize += nla_total_size(4); /* RTA_GATEWAY */
+ break;
+ case AF_INET6:
+ nhsize += nla_total_size(sizeof(struct rtvia) +
+ sizeof(struct in6_addr));
+ break;
+ }
+
+ if (!skip_oif && nhc->nhc_dev)
+ nhsize += nla_total_size(4); /* RTA_OIF */
+
+ if (nhc->nhc_lwtstate) {
+ /* RTA_ENCAP */
+ nhsize += lwtunnel_get_encap_size(nhc->nhc_lwtstate);
+ /* RTA_ENCAP_TYPE */
+ nhsize += nla_total_size(2);
+ }
+
+ return nhsize;
+}
+
size_t fib_nlmsg_size(struct fib_info *fi)
{
size_t payload = NLMSG_ALIGN(sizeof(struct rtmsg))
@@ -479,32 +507,35 @@ size_t fib_nlmsg_size(struct fib_info *f
payload += nla_total_size(4); /* RTA_NH_ID */
if (nhs) {
- size_t nh_encapsize = 0;
- /* Also handles the special case nhs == 1 */
-
- /* each nexthop is packed in an attribute */
- size_t nhsize = nla_total_size(sizeof(struct rtnexthop));
+ size_t mpsize = 0;
unsigned int i;
- /* may contain flow and gateway attribute */
- nhsize += 2 * nla_total_size(4);
-
- /* grab encap info */
for (i = 0; i < fib_info_num_path(fi); i++) {
struct fib_nh_common *nhc = fib_info_nhc(fi, i);
+ size_t nhsize;
+
+ nhsize = fib_nexthop_nlmsg_size(nhc, nhs != 1);
- if (nhc->nhc_lwtstate) {
- /* RTA_ENCAP_TYPE */
- nh_encapsize += lwtunnel_get_encap_size(
- nhc->nhc_lwtstate);
- /* RTA_ENCAP */
- nh_encapsize += nla_total_size(2);
+ if (nhs != 1)
+ nhsize += NLA_ALIGN(sizeof(struct rtnexthop));
+
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ if (nhc->nhc_family == AF_INET) {
+ struct fib_nh *nh;
+
+ nh = container_of(nhc, struct fib_nh, nh_common);
+ if (nh->nh_tclassid)
+ nhsize += nla_total_size(4);
}
+#endif
+ if (nhs == 1)
+ payload += nhsize;
+ else
+ mpsize += nhsize;
}
- /* all nexthops are packed in a nested attribute */
- payload += nla_total_size((nhs * nhsize) + nh_encapsize);
-
+ if (nhs != 1)
+ payload += nla_total_size(mpsize);
}
return payload;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 121/181] ipv4: fix use-after-free in fib_nhc_update_mtu()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (119 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 120/181] ipv4: Fix fib_nlmsg_size() for RTA_VIA nexthops Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 122/181] mei: pull kvfree out of spinlock Greg Kroah-Hartman
` (62 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Ido Schimmel, Chengfeng Ye,
Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chengfeng Ye <nicoyip.dev@gmail.com>
commit bc5bde9ce3cc36502839dfe98e068f7303a50982 upstream.
fib_nhc_update_mtu() walks the nexthop exception table under RTNL, but
RTNL does not serialize this walk with PMTU exception updates. The walk
uses rcu_dereference_protected() with a constant true condition without
holding fnhe_lock.
The following interleaving can therefore occur:
CPU 0 CPU 1
fib_nhc_update_mtu() update_or_create_fnhe()
load fnhe spin_lock_bh(&fnhe_lock)
fnhe_remove_oldest()
unlink fnhe
kfree_rcu(fnhe, rcu)
<quiescent state>
access fnhe after grace period
KASAN reported:
BUG: KASAN: slab-use-after-free in fib_nhc_update_mtu+0x3df/0x410
Read of size 8 at addr ffff888107d49000 by task poc/90
Call Trace:
fib_nhc_update_mtu+0x3df/0x410
fib_sync_mtu+0x7a/0xd0
fib_netdev_event+0x229/0x3f0
netif_set_mtu_ext+0x33a/0x570
dev_set_mtu+0x88/0x120
The same walk updates fnhe_pmtu and fnhe_mtu_locked. These fields form a
pair and other writers serialize them with fnhe_lock. RCU alone prevents
reclamation, but would still allow concurrent writers to leave a mixed
pair.
Walk the table under RCU and acquire fnhe_lock only while updating each
exception. RCU keeps the current entry alive while the short critical
section serializes its paired PMTU fields. This avoids holding the global
lock while scanning all 2048 buckets for every nexthop.
Fixes: af7d6cce5369 ("net: ipv4: update fnhe_pmtu when first hop's MTU changes")
Cc: stable@vger.kernel.org
Suggested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Chengfeng Ye <nicoyip.dev@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260807181710.1178747-1-nicoyip.dev@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/route.h | 2 ++
net/ipv4/fib_semantics.c | 34 +++++++++++-----------------------
net/ipv4/route.c | 29 +++++++++++++++++++++++++++++
3 files changed, 42 insertions(+), 23 deletions(-)
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -258,6 +258,8 @@ int fib_dump_info_fnhe(struct sk_buff *s
u32 table_id, struct fib_info *fi,
int *fa_index, int fa_start, unsigned int flags);
+void fnhe_update_pmtu(struct fib_nh_exception *fnhe, u32 new, u32 orig);
+
static inline void ip_rt_put(struct rtable *rt)
{
/* dst_release() accepts a NULL parameter.
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1956,42 +1956,30 @@ static int call_fib_nh_notifiers(struct
return NOTIFY_DONE;
}
-/* Update the PMTU of exceptions when:
- * - the new MTU of the first hop becomes smaller than the PMTU
- * - the old MTU was the same as the PMTU, and it limited discovery of
- * larger MTUs on the path. With that limit raised, we can now
- * discover larger MTUs
- * A special case is locked exceptions, for which the PMTU is smaller
- * than the minimal accepted PMTU:
- * - if the new MTU is greater than the PMTU, don't make any change
- * - otherwise, unlock and set PMTU
+/* Walk the exceptions of a nexthop after its first hop MTU changed. The
+ * chain is RCU protected here, while fnhe_update_pmtu() takes fnhe_lock
+ * for the update of each entry.
*/
void fib_nhc_update_mtu(struct fib_nh_common *nhc, u32 new, u32 orig)
{
struct fnhe_hash_bucket *bucket;
int i;
- bucket = rcu_dereference_protected(nhc->nhc_exceptions, 1);
+ rcu_read_lock();
+ bucket = rcu_dereference(nhc->nhc_exceptions);
if (!bucket)
- return;
+ goto out;
for (i = 0; i < FNHE_HASH_SIZE; i++) {
struct fib_nh_exception *fnhe;
- for (fnhe = rcu_dereference_protected(bucket[i].chain, 1);
+ for (fnhe = rcu_dereference(bucket[i].chain);
fnhe;
- fnhe = rcu_dereference_protected(fnhe->fnhe_next, 1)) {
- if (fnhe->fnhe_mtu_locked) {
- if (new <= fnhe->fnhe_pmtu) {
- fnhe->fnhe_pmtu = new;
- fnhe->fnhe_mtu_locked = false;
- }
- } else if (new < fnhe->fnhe_pmtu ||
- orig == fnhe->fnhe_pmtu) {
- fnhe->fnhe_pmtu = new;
- }
- }
+ fnhe = rcu_dereference(fnhe->fnhe_next))
+ fnhe_update_pmtu(fnhe, new, orig);
}
+out:
+ rcu_read_unlock();
}
void fib_sync_mtu(struct net_device *dev, u32 orig_mtu)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -739,6 +739,35 @@ out_unlock:
spin_unlock_bh(&fnhe_lock);
}
+/* Update the PMTU of an exception when:
+ * - the new MTU of the first hop becomes smaller than the PMTU
+ * - the old MTU was the same as the PMTU, and it limited discovery of
+ * larger MTUs on the path. With that limit raised, we can now
+ * discover larger MTUs
+ * A special case is locked exceptions, for which the PMTU is smaller
+ * than the minimal accepted PMTU:
+ * - if the new MTU is greater than the PMTU, don't make any change
+ * - otherwise, unlock and set PMTU
+ *
+ * fnhe_lock keeps fnhe_pmtu and fnhe_mtu_locked consistent against
+ * update_or_create_fnhe(), which sets both under the same lock.
+ */
+void fnhe_update_pmtu(struct fib_nh_exception *fnhe, u32 new, u32 orig)
+{
+ spin_lock_bh(&fnhe_lock);
+
+ if (fnhe->fnhe_mtu_locked) {
+ if (new <= fnhe->fnhe_pmtu) {
+ fnhe->fnhe_pmtu = new;
+ fnhe->fnhe_mtu_locked = false;
+ }
+ } else if (new < fnhe->fnhe_pmtu || orig == fnhe->fnhe_pmtu) {
+ fnhe->fnhe_pmtu = new;
+ }
+
+ spin_unlock_bh(&fnhe_lock);
+}
+
static void __ip_do_redirect(struct rtable *rt, struct sk_buff *skb, struct flowi4 *fl4,
bool kill_route)
{
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 122/181] mei: pull kvfree out of spinlock
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (120 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 121/181] ipv4: fix use-after-free in fib_nhc_update_mtu() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 123/181] nvmem: layouts: Add fixed-layout driver Greg Kroah-Hartman
` (61 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, Menachem Adin,
Alexander Usyskin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexander Usyskin <alexander.usyskin@intel.com>
commit b0495bb58af06a7de4628c72d500e3d5e180d808 upstream.
The read buffer allocation was changed from kmalloc() to kvmalloc().
This buffer is part of mei_cl_cb structure that can be queued in
rd_complete queue protected by spinlock.
Releasing the structure leads to errors like below when freeing buffer
that allocated non-contiguous:
BUG: sleeping function called from invalid context at mm/vmalloc.c:3448
Separate mei_cl_cb structure dequeue and release to
perform only dequeue under spinlock and push release out of spinlock.
Cc: stable <stable@kernel.org>
Fixes: 4adf613e01bf ("mei: use kvmalloc for read buffer")
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/16359
Reviewed-by: Menachem Adin <menachem.adin@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Link: https://patch.msgid.link/20260719-kvfree_out_of_spinlock-v1-1-e07d6333bea7@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/mei/client.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -447,18 +447,24 @@ static void mei_io_tx_list_free_cl(struc
}
/**
- * mei_io_list_free_fp - free cb from a list that matches file pointer
+ * mei_io_rd_list_free_fp - free cb from a rd_completed list that matches file pointer
*
- * @head: io list
+ * @cl: host client
* @fp: file pointer (matching cb file object), may be NULL
*/
-static void mei_io_list_free_fp(struct list_head *head, const struct file *fp)
+static void mei_io_rd_list_free_fp(struct mei_cl *cl, const struct file *fp)
{
struct mei_cl_cb *cb, *next;
+ LIST_HEAD(cmpl_list);
- list_for_each_entry_safe(cb, next, head, list)
+ spin_lock(&cl->rd_completed_lock);
+ list_for_each_entry_safe(cb, next, &cl->rd_completed, list)
if (!fp || fp == cb->fp)
- mei_io_cb_free(cb);
+ list_move(&cb->list, &cmpl_list);
+ spin_unlock(&cl->rd_completed_lock);
+
+ list_for_each_entry_safe(cb, next, &cmpl_list, list)
+ mei_io_cb_free(cb);
}
/**
@@ -587,9 +593,7 @@ int mei_cl_flush_queues(struct mei_cl *c
mei_io_list_flush_cl(&cl->dev->ctrl_rd_list, cl);
mei_cl_free_pending(cl);
}
- spin_lock(&cl->rd_completed_lock);
- mei_io_list_free_fp(&cl->rd_completed, fp);
- spin_unlock(&cl->rd_completed_lock);
+ mei_io_rd_list_free_fp(cl, fp);
return 0;
}
@@ -1426,7 +1430,7 @@ void mei_cl_add_rd_completed(struct mei_
}
/**
- * mei_cl_del_rd_completed - free read completed callback with lock
+ * mei_cl_del_rd_completed - unlink read completed callback with lock and free it
*
* @cl: host client
* @cb: callback block
@@ -1435,8 +1439,9 @@ void mei_cl_add_rd_completed(struct mei_
void mei_cl_del_rd_completed(struct mei_cl *cl, struct mei_cl_cb *cb)
{
spin_lock(&cl->rd_completed_lock);
- mei_io_cb_free(cb);
+ list_del_init(&cb->list);
spin_unlock(&cl->rd_completed_lock);
+ mei_io_cb_free(cb);
}
/**
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 123/181] nvmem: layouts: Add fixed-layout driver
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (121 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 122/181] mei: pull kvfree out of spinlock Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 124/181] serial: qcom-geni: fix TX DMA buffer flush Greg Kroah-Hartman
` (60 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Miquel Raynal, Mathieu Dubois-Briand,
Srinivas Kandagatla
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
commit b5be879519291f139fa7b365fd0dbc84710e4919 upstream.
Current implementation isn't working well when device tree nodes have a
phandle on a fixed-layout nvmem node. As the fixed layout is handled in
nvmem core, no driver is ever associated with the layout, and the device
consumer driver probe is deferred indefinitely.
Remove the specific handling of fixed-layout and add a layout driver.
This makes the fixed-layout similar to all other layouts, fixing the
whole issue.
Fixes: fc29fd821d9a ("nvmem: core: Rework layouts to become regular devices")
Cc: stable@vger.kernel.org
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260724223404.629248-3-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
MAINTAINERS | 5 +++
drivers/nvmem/core.c | 24 +-------------
drivers/nvmem/internals.h | 2 +
drivers/nvmem/layouts.c | 11 ------
drivers/nvmem/layouts/Makefile | 1
drivers/nvmem/layouts/fixed-layout.c | 58 +++++++++++++++++++++++++++++++++++
include/linux/nvmem-provider.h | 6 +++
7 files changed, 74 insertions(+), 33 deletions(-)
create mode 100644 drivers/nvmem/layouts/fixed-layout.c
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8849,6 +8849,11 @@ F: drivers/base/firmware_loader/
F: rust/kernel/firmware.rs
F: include/linux/firmware.h
+FIXED-LAYOUT NVMEM LAYOUT DRIVER
+M: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
+S: Maintained
+F: drivers/nvmem/layouts/fixed-layout.c
+
FLEXTIMER FTM-QUADDEC DRIVER
M: Patrick Havelange <patrick.havelange@essensium.com>
L: linux-iio@vger.kernel.org
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -811,7 +811,7 @@ static int nvmem_validate_keepouts(struc
return 0;
}
-static int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np)
+int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np)
{
struct device *dev = &nvmem->dev;
struct device_node *child;
@@ -863,29 +863,13 @@ static int nvmem_add_cells_from_dt(struc
return 0;
}
+EXPORT_SYMBOL_GPL(nvmem_add_cells_from_dt);
static int nvmem_add_cells_from_legacy_of(struct nvmem_device *nvmem)
{
return nvmem_add_cells_from_dt(nvmem, nvmem->dev.of_node);
}
-static int nvmem_add_cells_from_fixed_layout(struct nvmem_device *nvmem)
-{
- struct device_node *layout_np;
- int err = 0;
-
- layout_np = of_nvmem_layout_get_container(nvmem);
- if (!layout_np)
- return 0;
-
- if (of_device_is_compatible(layout_np, "fixed-layout"))
- err = nvmem_add_cells_from_dt(nvmem, layout_np);
-
- of_node_put(layout_np);
-
- return err;
-}
-
int nvmem_layout_register(struct nvmem_layout *layout)
{
int ret;
@@ -1038,10 +1022,6 @@ struct nvmem_device *nvmem_register(cons
goto err_remove_cells;
}
- rval = nvmem_add_cells_from_fixed_layout(nvmem);
- if (rval)
- goto err_remove_cells;
-
dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name);
rval = device_add(&nvmem->dev);
--- a/drivers/nvmem/internals.h
+++ b/drivers/nvmem/internals.h
@@ -35,6 +35,8 @@ struct nvmem_device {
bool sysfs_cells_populated;
};
+int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np);
+
#if IS_ENABLED(CONFIG_OF)
int nvmem_layout_bus_register(void);
void nvmem_layout_bus_unregister(void);
--- a/drivers/nvmem/layouts.c
+++ b/drivers/nvmem/layouts.c
@@ -125,11 +125,6 @@ static int nvmem_layout_create_device(st
return 0;
}
-static const struct of_device_id of_nvmem_layout_skip_table[] = {
- { .compatible = "fixed-layout", },
- {}
-};
-
static int nvmem_layout_bus_populate(struct nvmem_device *nvmem,
struct device_node *layout_dn)
{
@@ -142,12 +137,6 @@ static int nvmem_layout_bus_populate(str
return 0;
}
- /* Fixed layouts are parsed manually somewhere else for now */
- if (of_match_node(of_nvmem_layout_skip_table, layout_dn)) {
- pr_debug("%s() - skipping %pOF node\n", __func__, layout_dn);
- return 0;
- }
-
if (of_node_check_flag(layout_dn, OF_POPULATED_BUS)) {
pr_debug("%s() - skipping %pOF, already populated\n",
__func__, layout_dn);
--- a/drivers/nvmem/layouts/Makefile
+++ b/drivers/nvmem/layouts/Makefile
@@ -3,6 +3,7 @@
# Makefile for nvmem layouts.
#
+obj-$(CONFIG_NVMEM_LAYOUTS) += fixed-layout.o
obj-$(CONFIG_NVMEM_LAYOUT_SL28_VPD) += sl28vpd.o
obj-$(CONFIG_NVMEM_LAYOUT_ONIE_TLV) += onie-tlv.o
obj-$(CONFIG_NVMEM_LAYOUT_U_BOOT_ENV) += u-boot-env.o
--- /dev/null
+++ b/drivers/nvmem/layouts/fixed-layout.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2026 Bootlin
+ *
+ * Authors: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
+ */
+
+#include <linux/nvmem-provider.h>
+#include <linux/of.h>
+
+#include "../internals.h"
+
+static int fixed_layout_add_cells(struct nvmem_layout *layout)
+{
+ struct device_node *np;
+ int ret;
+
+ np = of_nvmem_layout_get_container(layout->nvmem);
+ if (!np)
+ return -ENOENT;
+
+ ret = nvmem_add_cells_from_dt(layout->nvmem, np);
+ of_node_put(np);
+
+ return ret;
+}
+
+static int fixed_layout_probe(struct nvmem_layout *layout)
+{
+ layout->add_cells = fixed_layout_add_cells;
+
+ return nvmem_layout_register(layout);
+}
+
+static void fixed_layout_remove(struct nvmem_layout *layout)
+{
+ nvmem_layout_unregister(layout);
+}
+
+static const struct of_device_id fixed_layout_of_match_table[] = {
+ { .compatible = "fixed-layout", },
+ {},
+};
+
+static struct nvmem_layout_driver fixed_layout_layout = {
+ .driver = {
+ .name = "fixed-layout",
+ .of_match_table = fixed_layout_of_match_table,
+ },
+ .probe = fixed_layout_probe,
+ .remove = fixed_layout_remove,
+};
+module_nvmem_layout_driver(fixed_layout_layout);
+
+MODULE_AUTHOR("Mathieu Dubois-Briand");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, fixed_layout_of_match_table);
+MODULE_DESCRIPTION("NVMEM fixed-layout driver");
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -238,6 +238,12 @@ static inline int nvmem_layout_register(
static inline void nvmem_layout_unregister(struct nvmem_layout *layout) {}
+static inline int nvmem_add_cells_from_dt(struct nvmem_device *nvmem,
+ struct device_node *np)
+{
+ return -EOPNOTSUPP;
+}
+
#endif /* CONFIG_NVMEM */
#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 124/181] serial: qcom-geni: fix TX DMA buffer flush
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (122 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 123/181] nvmem: layouts: Add fixed-layout driver Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 125/181] serial: 8250_dma: Clear stale RX state on shutdown Greg Kroah-Hartman
` (59 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jan Sebastian Götte, stable,
Praveen Talari
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jan Sebastian Götte <linux@jaseg.de>
commit e3c04834ae1ab5e9cfbe8ac54ec734aa4774249d upstream.
When transmit flushing a qcom-geni UART during an ongoing TX DMA, the
UART gets stuck infinitely repeating corrupted TX DMA frames.
The DMA-mode uart_ops does not provide a flush_buffer callback, so an
in-flight transfer can complete after serial core has reset the transmit
kfifo, underflowing its length and resubmitting page-sized transfers
indefinitely. Add one that stops the transfer and clears tx_remaining
and tx_queued.
The stop path was also broken: it unmapped the buffer while the serial
engine could still read it, and never reset the TX DMA state machine.
Cancel the main sequencer command first, then reset the state machine
and wait for it before unmapping. Drop the early return so a pending
mapping is also cleaned up when the main command is inactive.
The bug can be triggered from userspace with a large write immediately
followed by TCOFLUSH. A following tcdrain will hang forever. The bug was
reproduced and this fix was validated on Arduino Uno Q (QRB2210)
using /dev/ttyHS1.
Assisted-by: Claude:claude-5-opus Codex:gpt-5
Signed-off-by: Jan Sebastian Götte <linux@jaseg.de>
Fixes: 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA")
Cc: stable <stable@kernel.org>
Reviewed-by: Praveen Talari <praveen.talari@oss.qualcomm.com>
Link: https://patch.msgid.link/20260729174105.21838-2-git@jaseg.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/qcom_geni_serial.c | 43 +++++++++++++++++-----------------
1 file changed, 22 insertions(+), 21 deletions(-)
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -145,6 +145,7 @@ static const struct uart_ops qcom_geni_u
static struct uart_driver qcom_geni_console_driver;
static struct uart_driver qcom_geni_uart_driver;
+static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport);
static void __qcom_geni_serial_cancel_tx_cmd(struct uart_port *uport);
static void qcom_geni_serial_cancel_tx_cmd(struct uart_port *uport);
static int qcom_geni_serial_port_setup(struct uart_port *uport);
@@ -600,35 +601,34 @@ static unsigned int qcom_geni_serial_tx_
return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
}
+static void qcom_geni_serial_flush_buffer_dma(struct uart_port *uport)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+
+ qcom_geni_serial_stop_tx_dma(uport);
+ port->tx_remaining = 0;
+ port->tx_queued = 0;
+}
+
static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport)
{
struct qcom_geni_serial_port *port = to_dev_port(uport);
- bool done;
- if (!qcom_geni_serial_main_active(uport))
- return;
+ if (qcom_geni_serial_main_active(uport))
+ __qcom_geni_serial_cancel_tx_cmd(uport);
if (port->tx_dma_addr) {
+ writel(1, uport->membase + SE_DMA_TX_FSM_RST);
+ if (!qcom_geni_serial_poll_bit(uport, SE_DMA_TX_IRQ_STAT,
+ TX_RESET_DONE, true))
+ dev_err_ratelimited(uport->dev, "TX DMA reset failed");
+ writel(TX_RESET_DONE | TX_DMA_DONE,
+ uport->membase + SE_DMA_TX_IRQ_CLR);
+
geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr,
port->tx_remaining);
port->tx_dma_addr = 0;
- port->tx_remaining = 0;
}
-
- geni_se_cancel_m_cmd(&port->se);
-
- done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
- M_CMD_CANCEL_EN, true);
- if (!done) {
- geni_se_abort_m_cmd(&port->se);
- done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
- M_CMD_ABORT_EN, true);
- if (!done)
- dev_err_ratelimited(uport->dev, "M_CMD_ABORT_EN not set");
- writel(M_CMD_ABORT_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
- }
-
- writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
}
static void qcom_geni_serial_start_tx_dma(struct uart_port *uport)
@@ -1140,7 +1140,7 @@ static void qcom_geni_serial_shutdown(st
uart_port_unlock_irq(uport);
}
-static void qcom_geni_serial_flush_buffer(struct uart_port *uport)
+static void qcom_geni_serial_flush_buffer_fifo(struct uart_port *uport)
{
qcom_geni_serial_cancel_tx_cmd(uport);
}
@@ -1614,7 +1614,7 @@ static const struct uart_ops qcom_geni_c
.request_port = qcom_geni_serial_request_port,
.config_port = qcom_geni_serial_config_port,
.shutdown = qcom_geni_serial_shutdown,
- .flush_buffer = qcom_geni_serial_flush_buffer,
+ .flush_buffer = qcom_geni_serial_flush_buffer_fifo,
.type = qcom_geni_serial_get_type,
.set_mctrl = qcom_geni_serial_set_mctrl,
.get_mctrl = qcom_geni_serial_get_mctrl,
@@ -1637,6 +1637,7 @@ static const struct uart_ops qcom_geni_u
.request_port = qcom_geni_serial_request_port,
.config_port = qcom_geni_serial_config_port,
.shutdown = qcom_geni_serial_shutdown,
+ .flush_buffer = qcom_geni_serial_flush_buffer_dma,
.type = qcom_geni_serial_get_type,
.set_mctrl = qcom_geni_serial_set_mctrl,
.get_mctrl = qcom_geni_serial_get_mctrl,
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 125/181] serial: 8250_dma: Clear stale RX state on shutdown
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (123 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 124/181] serial: qcom-geni: fix TX DMA buffer flush Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 126/181] staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie() Greg Kroah-Hartman
` (58 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, stable, Cunhao Lu
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cunhao Lu <1579567540@qq.com>
commit e2fe6a0efecbef00e3ecc2db64dd5afa8c212b41 upstream.
serial8250_release_dma() terminates RX DMA and releases the channel, but
leaves rx_running set. If the port is closed while an RX transfer is
active, the stale state remains while rxchan is NULL until the channel is
requested again on the next open.
The DesignWare BUSY workaround added by commit a7b9ce39fbe4
("serial: 8250_dw: Ensure BUSY is deasserted") calls
serial8250_rx_dma_flush() from the LCR write path during startup. This
happens before serial8250_request_dma() obtains a new RX channel. On
reopen, the stale rx_running state therefore makes the flush path pass a
NULL channel to dmaengine_pause(), causing a kernel Oops.
Clear rx_running after terminating RX DMA, matching the TX cleanup. Also
make the flush helper return if the DMA object or RX channel is not
available so startup and teardown paths cannot pass a NULL channel to the
DMAengine API.
Fixes: 0fcb7901f9d6 ("tty: serial: 8250_dma: keep own book keeping about RX transfers")
Cc: stable <stable@kernel.org>
Signed-off-by: Cunhao Lu <1579567540@qq.com>
Link: https://patch.msgid.link/tencent_9EE2945F4C933B4D810C73C2D7485E000F06@qq.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/8250/8250_dma.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -211,11 +211,12 @@ void serial8250_rx_dma_flush(struct uart
{
struct uart_8250_dma *dma = p->dma;
- if (dma->rx_running) {
- dmaengine_pause(dma->rxchan);
- __dma_rx_complete(p);
- dmaengine_terminate_async(dma->rxchan);
- }
+ if (!dma || !dma->rxchan || !dma->rx_running)
+ return;
+
+ dmaengine_pause(dma->rxchan);
+ __dma_rx_complete(p);
+ dmaengine_terminate_async(dma->rxchan);
}
EXPORT_SYMBOL_GPL(serial8250_rx_dma_flush);
@@ -324,6 +325,7 @@ void serial8250_release_dma(struct uart_
/* Release RX resources */
dmaengine_terminate_sync(dma->rxchan);
+ dma->rx_running = 0;
dma_free_coherent(dma->rxchan->device->dev, dma->rx_size, dma->rx_buf,
dma->rx_addr);
dma_release_channel(dma->rxchan);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 126/181] staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (124 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 125/181] serial: 8250_dma: Clear stale RX state on shutdown Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 127/181] staging: rtl8723bs: fix OOB read in WMM_param_handler() Greg Kroah-Hartman
` (57 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, stable, Muhammad Bilal
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Muhammad Bilal <meatuni001@gmail.com>
commit 1c3e23e78862493e8cf1adad02b10ffcb8b9921c upstream.
rtw_get_wpa_ie() reads bytes at fixed offsets into a vendor-specific
information element without checking that the element is long enough,
causing an out-of-bounds read for a short trailing IE.
The function locates a vendor-specific IE (EID 221) with rtw_get_ie()
and then compares a 4-byte OUI+type at pbuf + 2 and reads a 2-byte
version word at pbuf + 6. Those accesses require the IE body to be at
least 6 bytes, but rtw_get_ie() only guarantees that the element fits
within the buffer; it does not enforce a minimum body length. A
vendor-specific IE whose length byte is 0 to 5, placed at the end of
the buffer, therefore makes these reads run past the end of the IE and
past the end of the buffer itself.
The buffer holds information elements taken from received management
frames and from the IE blob passed to rtw_cfg80211_set_wpa_ie(), which
is kmemdup'd to its exact length, so the read can run off the end of
the allocation.
The sibling helpers rtw_get_sec_ie(), rtw_get_wapi_ie() and
rtw_get_wps_ie() in this file already reject too-short vendor-specific
IEs before their OUI memcmp(); rtw_get_wpa_ie() was never brought in
line with them, and needs a minimum of 6 rather than 4 bytes because
of the version word. Add the missing length check.
Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Muhammad Bilal <meatuni001@gmail.com>
Link: https://patch.msgid.link/20260719030631.88254-1-meatuni001@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/rtl8723bs/core/rtw_ieee80211.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
+++ b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c
@@ -372,6 +372,9 @@ unsigned char *rtw_get_wpa_ie(unsigned c
pbuf = rtw_get_ie(pbuf, WLAN_EID_VENDOR_SPECIFIC, &len, limit_new);
if (pbuf) {
+ if (len < 6)
+ goto check_next_ie;
+
/* check if oui matches... */
if (memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type)))
goto check_next_ie;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 127/181] staging: rtl8723bs: fix OOB read in WMM_param_handler()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (125 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 126/181] staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 128/181] staging: rtl8723bs: fix missing shared-key auth challenge length check Greg Kroah-Hartman
` (56 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Muhammad Bilal
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Muhammad Bilal <meatuni001@gmail.com>
commit ae21407350151bddfd4fea7aa39bd0643c0ca9d3 upstream.
WMM_param_handler() copies a fixed-size WMM parameter element out of a
received information element without checking that the element is long
enough, causing an out-of-bounds read for a short WMM IE.
The handler reads sizeof(struct WMM_para_element) (18) bytes at
pIE->data + 6, so it requires pIE->length to be at least 24
(WLAN_WMM_LEN), but it never validates the length. Two of its three
callers reach it after matching only the WMM OUI: OnAssocRsp() in
rtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a
4-byte OUI, before calling the handler. A vendor-specific IE carrying
the WMM OUI but a length between 6 and 23, placed in an association
response or in the IE blob handed to join_cmd_hdl(), passes the OUI
check and then makes the memcmp() and memcpy() at pIE->data + 6 read
past the end of the element. OnAssocRsp() parses a frame received from
the AP, so this is reachable from a remote peer.
The remaining caller in rtw_wlan_util.c already guards the handler with
"pIE->length == WLAN_WMM_LEN". Move the equivalent check into the
handler itself so every caller is covered; the sibling IE handlers in
the same parsing loop (HT_caps_handler(), HT_info_handler(),
ERP_IE_handler()) likewise bound their accesses by pIE->length.
Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver")
Cc: stable@vger.kernel.org
Signed-off-by: Muhammad Bilal <meatuni001@gmail.com>
Link: https://patch.msgid.link/20260719041509.97894-1-meatuni001@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/rtl8723bs/core/rtw_wlan_util.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/staging/rtl8723bs/core/rtw_wlan_util.c
+++ b/drivers/staging/rtl8723bs/core/rtw_wlan_util.c
@@ -730,6 +730,9 @@ int WMM_param_handler(struct adapter *pa
return false;
}
+ if (pIE->length != WLAN_WMM_LEN)
+ return false;
+
if (!memcmp(&(pmlmeinfo->WMM_param), (pIE->data + 6), sizeof(struct WMM_para_element)))
return false;
else
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 128/181] staging: rtl8723bs: fix missing shared-key auth challenge length check
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (126 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 127/181] staging: rtl8723bs: fix OOB read in WMM_param_handler() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 129/181] staging: rtl8723bs: validate monitor transmit frame lengths Greg Kroah-Hartman
` (55 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, stable, Panagiotis Petrakopoulos
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Panagiotis Petrakopoulos <npetrakopoulos2003@gmail.com>
commit 2c56ef658ac8c6bca36bc5574715e8f717207c6c upstream.
The WEP shared-key authentication handler uses the challenge-text
element's attacker-controlled length without checking it against the
fixed 128-byte chg_txt buffer.
In OnAuthClient() the length from rtw_get_ie() - up to 255 - is used
to perform memcpy() into the 128-byte pmlmeinfo->chg_txt, so a
malicious AP sending a malformed WLAN_EID_CHALLENGE element can
overflow/underfill chg_txt by up to 127 bytes. It is reachable over the
air, before association, during shared-key authentication. In the case
of an overflow, the driver can write out of bounds. In the case of an
underfill, the driver can echo stale buffer memory.
The challenge text is defined to be exactly 128 octets, which is
already provided as the WLAN_AUTH_CHALLENGE_LEN define; require the
element to be exactly that length before use.
Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Panagiotis Petrakopoulos <npetrakopoulos2003@gmail.com>
Link: https://patch.msgid.link/20260720082409.168379-1-npetrakopoulos2003@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/rtl8723bs/core/rtw_mlme_ext.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
@@ -904,7 +904,7 @@ unsigned int OnAuthClient(struct adapter
p = rtw_get_ie(pframe + WLAN_HDR_A3_LEN + _AUTH_IE_OFFSET_, WLAN_EID_CHALLENGE, (int *)&len,
pkt_len - WLAN_HDR_A3_LEN - _AUTH_IE_OFFSET_);
- if (!p)
+ if (!p || len != WLAN_AUTH_CHALLENGE_LEN)
goto authclnt_fail;
memcpy((void *)(pmlmeinfo->chg_txt), (void *)(p + 2), len);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 129/181] staging: rtl8723bs: validate monitor transmit frame lengths
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (127 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 128/181] staging: rtl8723bs: fix missing shared-key auth challenge length check Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 130/181] misc: fastrpc: fix channel ctx ref leak when session alloc fails Greg Kroah-Hartman
` (54 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, stable, Mariano Baragiola
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mariano Baragiola <mbaragiola@linux.com>
commit 6829665d050983907b560173e49dcc6c11cb2730 upstream.
rtw_cfg80211_monitor_if_xmit_entry() removes the radiotap header and
then reads the 802.11 frame control field without checking that a base
802.11 header remains.
The data path also pulls the calculated 802.11, QoS and SNAP header
span before confirming that the skb contains it. A truncated frame can
therefore cause out-of-bounds reads or leave insufficient data for the
Ethernet address writes.
Reject frames that do not contain the base 802.11 header and data
frames that do not contain their complete calculated header span.
Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Mariano Baragiola <mbaragiola@linux.com>
Link: https://patch.msgid.link/20260727160859.1917096-1-mbaragiola@linux.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
+++ b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
@@ -2041,6 +2041,8 @@ static netdev_tx_t rtw_cfg80211_monitor_
/* Skip the ratio tap header */
skb_pull(skb, rtap_len);
+ if (skb->len < dot11_hdr_len)
+ goto fail;
dot11_hdr = (struct ieee80211_hdr *)skb->data;
frame_control = le16_to_cpu(dot11_hdr->frame_control);
@@ -2053,6 +2055,8 @@ static netdev_tx_t rtw_cfg80211_monitor_
qos_len = 2;
if ((frame_control & 0x0300) == 0x0300)
dot11_hdr_len += 6;
+ if (skb->len < dot11_hdr_len + qos_len + snap_len)
+ goto fail;
memcpy(dst_mac_addr, dot11_hdr->addr1, sizeof(dst_mac_addr));
memcpy(src_mac_addr, dot11_hdr->addr2, sizeof(src_mac_addr));
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 130/181] misc: fastrpc: fix channel ctx ref leak when session alloc fails
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (128 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 129/181] staging: rtl8723bs: validate monitor transmit frame lengths Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 131/181] misc: fastrpc: Remove buffer from list prior to unmap operation Greg Kroah-Hartman
` (53 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, Anandu Krishnan E,
Dmitry Baryshkov, Srinivas Kandagatla
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Anandu Krishnan E <anandu.e@oss.qualcomm.com>
commit 310f7868399668c6d99d88acc9c4cf3462e69d5b upstream.
fastrpc_channel_ctx_get() is called in fastrpc_device_open() before
fastrpc_session_alloc(). If session alloc fails, the error path
returns -EBUSY without calling fastrpc_channel_ctx_put(), leaking
the reference. Fix by adding the missing put.
Fixes: 278d56f970ae ("misc: fastrpc: Reference count channel context")
Cc: stable@kernel.org
Signed-off-by: Anandu Krishnan E <anandu.e@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260724223342.629168-5-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/fastrpc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1643,7 +1643,7 @@ static int fastrpc_device_open(struct in
dev_err(&cctx->rpdev->dev, "No session available\n");
mutex_destroy(&fl->mutex);
kfree(fl);
-
+ fastrpc_channel_ctx_put(cctx);
return -EBUSY;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 131/181] misc: fastrpc: Remove buffer from list prior to unmap operation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (129 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 130/181] misc: fastrpc: fix channel ctx ref leak when session alloc fails Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 132/181] misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke Greg Kroah-Hartman
` (52 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, Dmitry Baryshkov,
Ekansh Gupta, Jianping Li, Srinivas Kandagatla
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
commit 6102ceb4eab845743ee57acd3863fbd06e93c927 upstream.
fastrpc_req_munmap_impl() is called to unmap any buffer. The buffer is
getting removed from the list after it is unmapped from DSP. This can
create potential race conditions if multiple threads invoke unmap
concurrently, where one thread may remove the entry from the list while
another thread's unmap operation is still ongoing.
Fix this by removing the buffer entry from the list before calling the
unmap operation. If the unmap fails, the entry is re-added to the list
so that userspace can retry the unmap, or alternatively, the buffer
will be cleaned up during device release when the DSP process is torn
down and all DSP-side mappings are freed along with remaining buffers
in the list.
Fixes: 2419e55e532de ("misc: fastrpc: add mmap/unmap support")
Cc: stable@kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260724223342.629168-3-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/fastrpc.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1871,9 +1871,6 @@ static int fastrpc_req_munmap_impl(struc
&args[0]);
if (!err) {
dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr);
- spin_lock(&fl->lock);
- list_del(&buf->node);
- spin_unlock(&fl->lock);
fastrpc_buf_free(buf);
} else {
dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr);
@@ -1887,6 +1884,7 @@ static int fastrpc_req_munmap(struct fas
struct fastrpc_buf *buf = NULL, *iter, *b;
struct fastrpc_req_munmap req;
struct device *dev = fl->sctx->dev;
+ int err;
if (copy_from_user(&req, argp, sizeof(req)))
return -EFAULT;
@@ -1894,6 +1892,7 @@ static int fastrpc_req_munmap(struct fas
spin_lock(&fl->lock);
list_for_each_entry_safe(iter, b, &fl->mmaps, node) {
if ((iter->raddr == req.vaddrout) && (iter->size == req.size)) {
+ list_del(&iter->node);
buf = iter;
break;
}
@@ -1906,7 +1905,14 @@ static int fastrpc_req_munmap(struct fas
return -EINVAL;
}
- return fastrpc_req_munmap_impl(fl, buf);
+ err = fastrpc_req_munmap_impl(fl, buf);
+ if (err) {
+ spin_lock(&fl->lock);
+ list_add_tail(&buf->node, &fl->mmaps);
+ spin_unlock(&fl->lock);
+ }
+
+ return err;
}
static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 132/181] misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (130 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 131/181] misc: fastrpc: Remove buffer from list prior to unmap operation Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 133/181] misc: fastrpc: fix memory leak in fastrpc_channel_ctx_free Greg Kroah-Hartman
` (51 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Yuhao Jiang, Junrui Luo,
Dmitry Baryshkov, Srinivas Kandagatla
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Junrui Luo <moonafterrain@outlook.com>
commit b85a0e91d7d6cd06a53c881a46f749cfcef416a2 upstream.
When an invoke is interrupted by a signal,
wait_for_completion_interruptible() returns -ERESTARTSYS and
fastrpc_internal_invoke() moves every buffer from fl->mmaps onto
cctx->invoke_interrupted_mmaps. This list_del()/list_add_tail() walk
runs without holding fl->lock, the lock that serialises fl->mmaps in
fastrpc_req_mmap() and fastrpc_req_munmap() everywhere else.
Take fl->lock around the move, matching every other fl->mmaps accessor.
Fixes: 76e8e4ace1ed ("misc: fastrpc: Safekeep mmaps on interrupted invoke")
Reported-by: Yuhao Jiang <danisjiang@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Junrui Luo <moonafterrain@outlook.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260724223342.629168-4-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/fastrpc.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1279,10 +1279,12 @@ bail:
}
if (err == -ERESTARTSYS) {
+ spin_lock(&fl->lock);
list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
list_del(&buf->node);
list_add_tail(&buf->node, &fl->cctx->invoke_interrupted_mmaps);
}
+ spin_unlock(&fl->lock);
}
if (err)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 133/181] misc: fastrpc: fix memory leak in fastrpc_channel_ctx_free
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (131 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 132/181] misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 134/181] ring-buffer: Fix crash passing ERR_PTR to kthread_stop() Greg Kroah-Hartman
` (50 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eddie Lin, Ekansh Gupta,
Srinivas Kandagatla
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eddie Lin <eddie.lin@oss.qualcomm.com>
commit 2fae94ee14f7fea11d3f95e10383a87c01d21518 upstream.
The 'ctx_idr' is initialized but never destroyed when
the channel context is freed, leading to a memory leak.
Add idr_destroy() to properly clean up the IDR resources.
Fixes: f6f9279f2bf0 ("misc: fastrpc: Add Qualcomm fastrpc basic driver model")
Cc: stable@vger.kernel.org
Signed-off-by: Eddie Lin <eddie.lin@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260724223342.629168-6-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/fastrpc.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -469,6 +469,7 @@ static void fastrpc_channel_ctx_free(str
cctx = container_of(ref, struct fastrpc_channel_ctx, refcount);
+ idr_destroy(&cctx->ctx_idr);
kfree(cctx);
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 134/181] ring-buffer: Fix crash passing ERR_PTR to kthread_stop()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (132 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 133/181] misc: fastrpc: fix memory leak in fastrpc_channel_ctx_free Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 135/181] ALSA: usb: Fix UAF at delayed release of MIDI2 EPs Greg Kroah-Hartman
` (49 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Hui Su, Vincent Donnefort,
Masami Hiramatsu (Google), Steven Rostedt
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hui Su <sh_def@163.com>
commit 91542863abade2fd4f2b361991f5386ad9d19c8c upstream.
In test_ringbuffer()'s out_free cleanup loop, the check
`!rb_threads[cpu]` only catches NULL entries and misses entries that
hold an ERR_PTR.
rb_threads[] is static, so unassigned slots are NULL. But when
kthread_run_on_cpu() fails for a cpu, it stores ERR_PTR(-ENOMEM) (or
-EINTR) in rb_threads[cpu] before the creation loop jumps to out_free.
That entry is non-NULL, so the old `!ptr` check does not break, and the
cleanup proceeds to call kthread_stop() on the ERR_PTR. kthread_stop()
then dereferences the bogus pointer, crashing the kernel during the
late_initcall self-test.
crash logs:
BUG: kernel NULL pointer dereference, address: 000000000000001c
Oops: 0002 [#1] SMP NOPTI
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 7.2.0-rc6-dirty #7 PREEMPT(lazy)
RIP: 0010:kthread_stop+0x2e/0x220
RBX: fffffffffffffff4
CR2: 000000000000001c
Call Trace:
<TASK>
test_ringbuffer+0x1ec/0x650
do_one_initcall+0x6c/0x2c0
kernel_init_freeable+0x21d/0x420
kernel_init+0x15/0x1c0
ret_from_fork+0x21b/0x320
</TASK>
Kernel panic - not syncing: Fatal exception
Cc: stable@vger.kernel.org
Fixes: 64ed3a049e3e ("ring-buffer: make use of the helper function kthread_run_on_cpu()")
Link: https://patch.msgid.link/20260807154145.2846521-2-sh_def@163.com
Signed-off-by: Hui Su <sh_def@163.com>
Reviewed-by: Vincent Donnefort <vdonnefort@google.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/trace/ring_buffer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -7604,7 +7604,7 @@ static __init int test_ringbuffer(void)
out_free:
for_each_online_cpu(cpu) {
- if (!rb_threads[cpu])
+ if (IS_ERR_OR_NULL(rb_threads[cpu]))
break;
kthread_stop(rb_threads[cpu]);
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 135/181] ALSA: usb: Fix UAF at delayed release of MIDI2 EPs
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (133 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 134/181] ring-buffer: Fix crash passing ERR_PTR to kthread_stop() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 136/181] ALSA: usx2y: bound the hwdep mmap fault offset Greg Kroah-Hartman
` (48 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+565b1138cfbe549d4422,
Takashi Iwai
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Takashi Iwai <tiwai@suse.de>
commit f8a80cfb68613fb7e6452b66447dbc63f435d140 upstream.
The recent fix for UAF in ump_to_endpoint() caused another UAF because
it tries to dereference the UMP endpoint object, but this might be
executed at a delayed context where the endpoint has been already
released.
Add private_free to clear the associated data for avoiding the further
dereference for delayed releases.
Fixes: 4a05b2d1b464 ("ALSA: usb-audio: fix use-after-free in ump_to_endpoint()")
Reported-by: syzbot+565b1138cfbe549d4422@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=565b1138cfbe549d4422
Cc: <stable@vger.kernel.org>
Link: https://patch.msgid.link/20260808152009.1947835-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/midi2.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/sound/usb/midi2.c
+++ b/sound/usb/midi2.c
@@ -685,6 +685,14 @@ static int parse_midi_2_0_endpoints(stru
return 0;
}
+static void free_ump_private_data(struct snd_ump_endpoint *ump)
+{
+ struct snd_usb_midi2_ump *rmidi = ump->private_data;
+
+ if (rmidi)
+ rmidi->ump = NULL;
+}
+
static void free_all_midi2_umps(struct snd_usb_midi2_interface *umidi)
{
struct snd_usb_midi2_ump *rmidi;
@@ -735,6 +743,7 @@ static int create_midi2_ump(struct snd_u
ump->private_data = rmidi;
ump->ops = &snd_usb_midi_v2_ump_ops;
+ ump->private_free = free_ump_private_data;
rmidi->eps[STR_IN] = ep_in;
rmidi->eps[STR_OUT] = ep_out;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 136/181] ALSA: usx2y: bound the hwdep mmap fault offset
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (134 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 135/181] ALSA: usb: Fix UAF at delayed release of MIDI2 EPs Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 137/181] tracing: Fix race between update_event_fields and, event_define_fields Greg Kroah-Hartman
` (47 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Federico Kirschbaum, Baul Lee,
Takashi Iwai
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baul Lee <baul.lee@xbow.com>
commit 2ca1eea3cd17930daffe9e429a7c89232036ec24 upstream.
snd_us428ctls_vm_fault() turns the faulting page offset into a kernel
address with no bound of any kind:
offset = vmf->pgoff << PAGE_SHIFT;
vaddr = (char *)(...)->us428ctls_sharedmem + offset;
page = virt_to_page(vaddr);
get_page(page);
vmf->page = page;
return 0;
snd_us428ctls_mmap() checks only the length of the mapping, never the
offset, and us428ctls_sharedmem is a single page from
alloc_pages_exact(). For a character device file_mmap_size_max()
returns ULONG_MAX, so the mm layer imposes no ceiling either. Every page
offset above zero resolves to a struct page outside the object, and the
handler installs it into the caller's address space read-write; the vma
is not marked read-only.
The caller picks the page frame with a single mmap() argument and gets
read-write access to a page of kernel memory it does not own; an offset
that lands in an unpopulated vmemmap region oopses instead.
A process that can open the hwdep node of an attached US-X2Y reaches
this after loading the FPGA image through the same node; no capability
check is involved.
On 7.2.0-rc5 (arm64), mmap() with a large offset:
Unable to handle kernel paging request at virtual address fffffdffc45d5ac8
pc : snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]
Call trace:
snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]
__do_fault
__handle_mm_fault
handle_mm_fault
el0_da
Reject any offset outside the shared region. The pcm hwdep handler in
usx2yhwdeppcm.c computes its address the same way and needs the same
bound.
Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Federico Kirschbaum <federico.kirschbaum@xbow.com>
Reported-by: Baul Lee <baul.lee@xbow.com>
Cc: stable@vger.kernel.org
Signed-off-by: Baul Lee <baul.lee@xbow.com>
Link: https://patch.msgid.link/20260805013445.38283-1-baul.lee@xbow.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/usx2y/usX2Yhwdep.c | 2 ++
sound/usb/usx2y/usx2yhwdeppcm.c | 2 ++
2 files changed, 4 insertions(+)
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -25,6 +25,8 @@ static vm_fault_t snd_us428ctls_vm_fault
void *vaddr;
offset = vmf->pgoff << PAGE_SHIFT;
+ if (offset >= US428_SHAREDMEM_PAGES)
+ return VM_FAULT_SIGBUS;
vaddr = (char *)((struct usx2ydev *)vmf->vma->vm_private_data)->us428ctls_sharedmem + offset;
page = virt_to_page(vaddr);
get_page(page);
--- a/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -681,6 +681,8 @@ static vm_fault_t snd_usx2y_hwdep_pcm_vm
void *vaddr;
offset = vmf->pgoff << PAGE_SHIFT;
+ if (offset >= USX2Y_HWDEP_PCM_PAGES)
+ return VM_FAULT_SIGBUS;
vaddr = (char *)((struct usx2ydev *)vmf->vma->vm_private_data)->hwdep_pcm_shm + offset;
vmf->page = virt_to_page(vaddr);
get_page(vmf->page);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 137/181] tracing: Fix race between update_event_fields and, event_define_fields
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (135 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 136/181] ALSA: usx2y: bound the hwdep mmap fault offset Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 138/181] fbdev: bitblit: bound-check glyph index in bit_cursor() Greg Kroah-Hartman
` (46 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Michael Wu, Steven Rostedt
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Wu <michael@allwinnertech.com>
commit c3730b8373bb5059d735509b9e6a00d7eb337d7c upstream.
The following sequence may leads race between event_define_fields()
and update_event_fields():
CPU0 (loads module A) CPU1 (loads module B)
=============================== ===============================
load_module(A) load_module(B)
notifier_call_chain notifier_call_chain
trace_module_notify trace_module_notify
mutex_lock(&event_mutex) trace_event_update_all()
trace_module_add_events(A) down_write(&trace_event_sem)
__register_event(call_A)
__add_event_to_tracers(call_A)
event_define_fields(call_A)
for each f: list_for_each_entry(field,
list_add(&f->link, &class->fields, link)
&class->fields) field = class->fields->next;
Where access to the class->fields is not protected by the event_mutex in
trace_event_update_all().
This produces the following panic:
Unable to handle kernel access ... at virtual address 0000000000000018
pc : update_event_fields+0xf8/0x368
Call trace:
update_event_fields+0xf8/0x368
trace_event_update_all+0x7c/0x2b4
trace_module_notify+0x4c/0x1dc
notifier_call_chain+0x84/0x168
blocking_notifier_call_chain_robust+0x64/0xd4
load_module+0x10c8/0x123c
__arm64_sys_finit_module+0x230/0x31c
Fix by taking event_mutex in trace_event_update_all() before
trace_event_sem.
Cc: stable@vger.kernel.org
Fixes: b3bc8547d3be ("tracing: Have TRACE_DEFINE_ENUM affect trace event types as well")
Link: https://patch.msgid.link/2e5730d2-c631-da41-3a3a-ae35bb4895f3@allwinnertech.com
Signed-off-by: Michael Wu <michael@allwinnertech.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/trace/trace_events.c | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -3072,6 +3072,7 @@ void trace_event_eval_update(struct trac
int last_i;
int i;
+ mutex_lock(&event_mutex);
down_write(&trace_event_sem);
list_for_each_entry_safe(call, p, &ftrace_events, list) {
/* events are usually grouped together with systems */
@@ -3105,6 +3106,7 @@ void trace_event_eval_update(struct trac
cond_resched();
}
up_write(&trace_event_sem);
+ mutex_unlock(&event_mutex);
}
static bool event_in_systems(struct trace_event_call *call,
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 138/181] fbdev: bitblit: bound-check glyph index in bit_cursor()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (136 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 137/181] tracing: Fix race between update_event_fields and, event_define_fields Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 139/181] ring-buffer: Prevent subbuf order change when resizing is disabled Greg Kroah-Hartman
` (45 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+61b1db46218109869c14,
Rik van Riel, Helge Deller
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Rik van Riel <riel@surriel.com>
commit e033cbf3975a8465f879ebd5989dc35b04423a4d upstream.
bit_cursor() fetches the glyph under the cursor with
c = scr_readw(vc_pos);
src = vc_font.data + ((c & charmask) * w * height);
where charmask is 0x1ff when vc_hi_font_mask is set. The screen buffer
value comes directly from scr_readw() and may be larger than the current
font's glyph count.
Syzkaller triggers this via vcs_write(). The Call Trace shows
vcs_write() in vc_screen.c writing an arbitrary 16-bit value with
writev() to /dev/vcsa, which vcs_write_buf() in vc_screen.c stores via
vcs_scr_writew() without checking charcount. The stored value is later
read in bit_cursor() in bitblit.c.
When the font is changed from a font with 512 glyphs to a font with
256 glyphs, the screen buffer can retain characters with the high
bit set from the previous mode, which could also produce the same
out-of-bounds access.
BUG: KASAN: global-out-of-bounds in soft_cursor+0x378/0x6bc drivers/video/fbdev/core/softcursor.c:70
Read of size 16 at addr ffff800086c57970
Call Trace:
soft_cursor+0x378/0x6bc drivers/video/fbdev/core/softcursor.c:70
bit_cursor+0xa90/0x1108 drivers/video/fbdev/core/bitblit.c:365
fbcon_cursor+0x344/0x498 drivers/video/fbdev/core/fbcon.c:1427
hide_cursor+0xdc/0x2d0 drivers/tty/vt/vt.c:883
update_region+0x100/0x18c drivers/tty/vt/vt.c:669
vcs_write+0x8ec/0xaf0 drivers/tty/vt/vc_screen.c:685
bit_putcs_aligned() and bit_putcs_unaligned() already clamp the glyph
index to vc_font.charcount. Apply the same clamp in bit_cursor() after
extracting the attribute and masking, before indexing fontdata.
The fix completes the bounds checking started in commit 18c4ef4e765a
("fbdev: bitblit: bound-check glyph index in bit_putcs*"), which missed
the cursor path.
This change should be safe because the clamp reuses the existing
contract from fbcon: charcount is maintained under console_lock in
con_font_set() and fbcon_font_set(), and hi_font_mask is cleared when
switching from 512 to 256 glyphs. When stale screen data with high bits
remains after a font switch, or when vcs_write() stores an arbitrary
value, clamping the index to 0 prevents the out-of-bounds read without
changing cursor semantics — the same fallback bit_putcs uses.
Reported-by: syzbot+61b1db46218109869c14@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=61b1db46218109869c14
Link: https://lore.kernel.org/all/6a75205c.01d0871a.3a0d52.0032.GAE@google.com/
Fixes: 18c4ef4e765a ("fbdev: bitblit: bound-check glyph index in bit_putcs*")
Cc: stable@vger.kernel.org
Assisted-by: Hermes:muse-spark-1.2 syzkaller
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/video/fbdev/core/bitblit.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
--- a/drivers/video/fbdev/core/bitblit.c
+++ b/drivers/video/fbdev/core/bitblit.c
@@ -274,9 +274,14 @@ static void bit_cursor(struct vc_data *v
if (!vc->vc_font.data)
return;
- c = scr_readw((u16 *) vc->vc_pos);
+ c = scr_readw((u16 *) vc->vc_pos);
attribute = get_attribute(info, c);
- src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
+ c &= charmask;
+
+ /* Clamp to font size, same as bit_putcs_aligned() */
+ if (c >= vc->vc_font.charcount)
+ c = 0;
+ src = vc->vc_font.data + (c * (w * vc->vc_font.height));
if (par->cursor_state.image.data != src ||
par->cursor_reset) {
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 139/181] ring-buffer: Prevent subbuf order change when resizing is disabled
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (137 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 138/181] fbdev: bitblit: bound-check glyph index in bit_cursor() Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 140/181] mm/huge_memory: fix huge_zero_pfn race Greg Kroah-Hartman
` (44 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+e0cc44465d6bae735679,
Vincent Donnefort, Steven Rostedt
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Vincent Donnefort <vdonnefort@google.com>
commit bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 upstream.
Because ring_buffer_subbuf_order_set() frees buffer pages, we can't
allow it when resizing is disabled. A non-consuming reader is at risk of
use-after-free (rb_advance_iter()).
Return -EBUSY on resize_disabled, matching ring_buffer_resize()
behaviour.
Cc: stable@vger.kernel.org
Fixes: f9b94daa542a ("ring-buffer: Set new size of the ring buffer sub page")
Link: https://patch.msgid.link/20260806211306.3704194-3-vdonnefort@google.com
Reported-by: syzbot+e0cc44465d6bae735679@syzkaller.appspotmail.com
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/trace/ring_buffer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -6756,7 +6756,7 @@ int ring_buffer_subbuf_order_set(struct
cpu_buffer = buffer->buffers[cpu];
- if (cpu_buffer->mapped) {
+ if (atomic_read(&cpu_buffer->resize_disabled)) {
err = -EBUSY;
goto error;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 140/181] mm/huge_memory: fix huge_zero_pfn race
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (138 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 139/181] ring-buffer: Prevent subbuf order change when resizing is disabled Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 141/181] net: smc: fix splice entry lifetime imbalance in smc_rx_splice Greg Kroah-Hartman
` (43 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Lorenzo Stoakes (ARM), Hengbin Zhang,
David Hildenbrand (Arm), Baolin Wang, Barry Song, Dev Jain,
Hannes Reinecke, Hugh Dickins, Kiryl Shutsemau, Lance Yang,
Liam R. Howlett, Nico Pache, Pankaj Raghav, Ryan Roberts,
Yang Shi, Zi Yan, Andrew Morton
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lorenzo Stoakes (ARM) <ljs@kernel.org>
commit 33192a26cddea7a7e4ca66e5c3eebd36fa8be2bb upstream.
Patch series "mm/huge_memory: fix huge_zero_pfn race", v2.
There is a subtle race in the reference-counted huge_zero_folio
implementation.
The fast path atomic logic fails to account for the fact that the shrinker
(which drops the final huge_zero_refcount pin) can overwrite huge_zero_pfn
with the ~0UL sentinel value in shrink_huge_zero_folio_scan() after a
racing get_huge_zero_folio() installed a valid value there.
This results in huge_zero_folio being correctly set but huge_zero_pfn
being set incorrectly and thus is_huge_zero_pfn() and consequently
is_huge_zero_pmd() will misidentify the huge zero folio as being an
ordinary THP folio.
This can result in the huge zero folio being split and otherwise treated
incorrectly.
The solution to this is very subtle as there is an atomic fast path, and
thus ordering in weakly ordered architectures has to be treated very
carefully.
The first commit fixes the issue by introducing a spinlock around
huge_zero_[pfn, folio, refcount] write, with careful consideration paid to
load/store ordering in the fast path. It is placed first and kept as
small as possible so that it can be backported on its own.
The second commit is a pure cleanup which reworks the
CONFIG_PERSISTENT_HUGE_ZERO_FOLIO logic to better separate the persistent
logic from the dynamically allocated one.
This patch (of 2):
If !CONFIG_PERSISTENT_HUGE_ZERO_FOLIO, the huge_zero_folio is refcounted
by huge_zero_refcount and returned by mm_get_huge_zero_folio().
When the caller is done with the huge zero page, its reference count is
decremented. Only a shrinker can set the reference count to zero.
A race can unfortunately occur between a shrinker decrementing the
reference count to zero and a concurrent page fault.
This is because shrink_huge_zero_folio_scan() might, if very unlucky, be
preempted between setting huge_zero_refcount to zero and writing an
invalid value.
During this time get_huge_zero_folio() could write to huge_zero_pfn before
shrink_huge_zero_folio_scan() resumes.
In this event the huge zero folio will be persistently misidentified
causing the THP code path to be entered inappropriately for the huge zero
folio:
CPU 0 CPU 1
=======================================|=================================
shrink_huge_zero_folio_scan() |
atomic_cmpxchg() sets refcount to 0 |
xchg() sets huge_zero_folio to NULL | get_huge_zero_folio()
| | atomic_inc_not_zero() -> zero
preempted for a long time | Allocate new huge zero folio
| | Write valid huge_zero_folio
v | Write valid huge_zero_pfn
Overwrite huge_zero_pfn with ~0UL <--- Invalid overwrite!
This results in is_huge_zero_pfn() and is_huge_zero_pmd() incorrectly
returning false for a huge zero page which could result in issues like the
huge zero folio being incorrectly split.
Note that the issue is with huge_zero_pfn not huge_zero_folio, as
get_huge_zero_folio() uses cmpxchg() gated on huge_zero_folio being NULL
with a retry loop and shrink_huge_zero_folio_scan() uses xchg() to set
huge_zero_folio.
Fix the issue by introducing a spinlock, huge_zero_lock, to prevent
concurrent write of huge_zero_folio, huge_zero_pfn and huge_zero_refcount.
There needs to be significant care taken here to ensure correctness:
The fast path in get_huge_zero_folio() uses atomic_inc_not_zero(), which
is outside of the critical section, and means huge zero allocation is
gated on zero huge_zero_refcount.
The fast path doesn't use huge_zero_lock, so the critical section is
irrelevant to it.
So invariants are required - huge_zero_refcount MUST:
* Only be set in the huge_zero_lock critical section to ensure
serialisation of huge_zero_pfn, huge_zero_folio and huge_zero_refcount
writes.
* Be set non-zero only AFTER huge_zero_[pfn, folio] are set to valid values
so installation of the huge zero folio on read page fault ensures
concurrent is_huge_zero_*() calls correctly identify the huge zero folio.
* Be set zero only BEFORE huge_zero_[pfn, folio] are set to NULL and ~0UL
respectively, and atomically.
Establish these by:
* Only setting huge_zero_refcount to zero or an absolute value in the
huge_zero_lock critical section in get_huge_zero_folio() and
shrink_huge_zero_folio_scan(), and always updating atomically there
and elsewhere.
* Using atomic_set_release(&huge_zero_refcount) in get_huge_zero_folio()
after huge_zero_[pfn, folio] are set. This is paired with
atomic_inc_not_zero() to ensure atomic_inc_not_zero() only observes a
non-zero value if huge_zero_[pfn, folio] are set.
* Using atomic_cmpxchg() in shrink_huge_zero_folio_scan() (as before) to
ensure that it is set zero only when equal to 1 and set atomically.
* atomic_cmpxchg() being fully ordered ensures this is done prior to
huge_zero_[folio, pfn] being set to NULL and ~0UL respectively.
Eliminate the retry loop in get_huge_zero_folio() as the atomic_cmpxchg()
in shrink_huge_zero_folio_scan() is now performed under the lock, and
replace with an equally locked atomic_inc() to set the reference count
should the caller be raced on huge zero folio installation.
folio_put() naturally implies a full memory barrier so its ordering is
maintained correctly.
The huge zero folio also cannot be released except when the shrinker does
so as it is non-LRU and non-rmappable.
Note that only the huge zero shrinker (via shrink_huge_zero_folio_scan())
can actually set huge_zero_refcount to zero, which is the count of mm's
which have at least one huge zero folio installed plus one shrinker pin.
Additionally convert a BUG_ON() to a VM_WARN_ON_ONCE().
Link: https://lore.kernel.org/20260730-fix-refcounted-huge-zero-v2-0-c5d8a41b317f@kernel.org
Link: https://lore.kernel.org/20260730-fix-refcounted-huge-zero-v2-1-c5d8a41b317f@kernel.org
Fixes: 3b77e8c8cde5 ("mm/thp: make is_huge_zero_pmd() safe and quicker")
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reported-by: Hengbin Zhang <uqbarz@gmail.com>
Closes: https://lore.kernel.org/linux-mm/20260727154001.4102341-1-uqbarz@gmail.com/
Suggested-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kiryl Shutsemau <kas@kernel.org>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Nico Pache <npache@redhat.com>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
mm/huge_memory.c | 43 +++++++++++++++++++++++++++++--------------
1 file changed, 29 insertions(+), 14 deletions(-)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -41,6 +41,7 @@
#include <linux/compat.h>
#include <linux/pgalloc_tag.h>
#include <linux/pagewalk.h>
+#include <linux/cleanup.h>
#include <asm/tlb.h>
#include <asm/pgalloc.h>
@@ -77,6 +78,7 @@ static unsigned long deferred_split_scan
static bool split_underused_thp = true;
static atomic_t huge_zero_refcount;
+static DEFINE_SPINLOCK(huge_zero_lock);
struct folio *huge_zero_folio __read_mostly;
unsigned long huge_zero_pfn __read_mostly = ~0UL;
unsigned long huge_anon_orders_always __read_mostly;
@@ -197,7 +199,8 @@ unsigned long __thp_vma_allowable_orders
static bool get_huge_zero_page(void)
{
struct folio *zero_folio;
-retry:
+
+ /* Paired with atomic_set_release(). */
if (likely(atomic_inc_not_zero(&huge_zero_refcount)))
return true;
@@ -209,17 +212,22 @@ retry:
}
/* Ensure zero folio won't have large_rmappable flag set. */
folio_clear_large_rmappable(zero_folio);
- preempt_disable();
- if (cmpxchg(&huge_zero_folio, NULL, zero_folio)) {
- preempt_enable();
+
+ /* Paired with critical section in shrink_huge_zero_folio_scan(). */
+ spin_lock(&huge_zero_lock);
+ if (huge_zero_folio) {
+ /* Somebody else already installed it. */
+ atomic_inc(&huge_zero_refcount);
+ spin_unlock(&huge_zero_lock);
folio_put(zero_folio);
- goto retry;
+ return true;
}
+ WRITE_ONCE(huge_zero_folio, zero_folio);
WRITE_ONCE(huge_zero_pfn, folio_pfn(zero_folio));
+ /* Paired with atomic_inc_not_zero(). +1 for shrinker pin. */
+ atomic_set_release(&huge_zero_refcount, 2);
+ spin_unlock(&huge_zero_lock);
- /* We take additional reference here. It will be put back by shrinker */
- atomic_set(&huge_zero_refcount, 2);
- preempt_enable();
count_vm_event(THP_ZERO_PAGE_ALLOC);
return true;
}
@@ -263,15 +271,22 @@ static unsigned long shrink_huge_zero_pa
static unsigned long shrink_huge_zero_page_scan(struct shrinker *shrink,
struct shrink_control *sc)
{
- if (atomic_cmpxchg(&huge_zero_refcount, 1, 0) == 1) {
- struct folio *zero_folio = xchg(&huge_zero_folio, NULL);
- BUG_ON(zero_folio == NULL);
+ struct folio *zero_folio;
+
+ /* Paired with critical section in get_huge_zero_folio(). */
+ scoped_guard(spinlock, &huge_zero_lock) {
+ /* Paired with atomic_inc_not_zero() in get_huge_zero_folio(). */
+ if (atomic_cmpxchg(&huge_zero_refcount, 1, 0) != 1)
+ return 0;
+
+ zero_folio = huge_zero_folio;
+ VM_WARN_ON_ONCE(!zero_folio);
+ WRITE_ONCE(huge_zero_folio, NULL);
WRITE_ONCE(huge_zero_pfn, ~0UL);
- folio_put(zero_folio);
- return HPAGE_PMD_NR;
}
- return 0;
+ folio_put(zero_folio);
+ return HPAGE_PMD_NR;
}
static struct shrinker *huge_zero_page_shrinker;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 141/181] net: smc: fix splice entry lifetime imbalance in smc_rx_splice
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (139 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 140/181] mm/huge_memory: fix huge_zero_pfn race Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 142/181] ipv6: prevent in6_dev_get() from resurrecting inet6_dev Greg Kroah-Hartman
` (42 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Xiao Liu, Daming Li, Ren Wei,
Dust Li, Sidraya Jayagond, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Daming Li <d4n.for.sec@gmail.com>
commit 5d9686af2976741bbd79b150d1c9e60b81e7f12e upstream.
smc_rx_splice() passes pages to splice_to_pipe() before taking the
references that cover the lifetime of each splice entry. In the
VM-backed RMB path, splice_to_pipe() may drop unqueued entries through
smc_rx_spd_release(), while queued entries are released later via the
pipe buffer callback.
The old post-splice accounting also derives the number of queued VM pages
from an offset mutated while building the descriptor, and a multi-page
splice pairs one sock_hold() with multiple sock_put() calls.
Take the page and socket references for every candidate entry before
splice_to_pipe(), and drop the matching private state, page reference,
and socket reference from smc_rx_spd_release() for entries that never
get queued. This fixes a refcount imbalance that can underflow page
refcounts and trigger a use-after-free.
Fixes: 9014db202cb7 ("smc: add support for splice()")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Co-developed-by: Xiao Liu <lx24@stu.ynu.edu.cn>
Signed-off-by: Xiao Liu <lx24@stu.ynu.edu.cn>
Signed-off-by: Daming Li <d4n.for.sec@gmail.com>
Signed-off-by: Ren Wei <enjou1224z@gmail.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Reviewed-by: Sidraya Jayagond <sidraya@linux.ibm.com>
Link: https://patch.msgid.link/20260730145552.360287-2-enjou1224z@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/smc/smc_rx.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
--- a/net/smc/smc_rx.c
+++ b/net/smc/smc_rx.c
@@ -150,7 +150,12 @@ static const struct pipe_buf_operations
static void smc_rx_spd_release(struct splice_pipe_desc *spd,
unsigned int i)
{
+ struct smc_spd_priv *priv = (struct smc_spd_priv *)spd->partial[i].private;
+ struct sock *sk = &priv->smc->sk;
+
+ kfree(priv);
put_page(spd->pages[i]);
+ sock_put(sk);
}
static int smc_rx_splice(struct pipe_inode_info *pipe, char *src, size_t len,
@@ -209,6 +214,10 @@ static int smc_rx_splice(struct pipe_ino
offset = 0;
}
}
+ for (i = 0; i < nr_pages; i++) {
+ get_page(pages[i]);
+ sock_hold(&smc->sk);
+ }
spd.nr_pages_max = nr_pages;
spd.nr_pages = nr_pages;
spd.pages = pages;
@@ -217,16 +226,8 @@ static int smc_rx_splice(struct pipe_ino
spd.spd_release = smc_rx_spd_release;
bytes = splice_to_pipe(pipe, &spd);
- if (bytes > 0) {
- sock_hold(&smc->sk);
- if (!lgr->is_smcd && smc->conn.rmb_desc->is_vm) {
- for (i = 0; i < PAGE_ALIGN(bytes + offset) / PAGE_SIZE; i++)
- get_page(pages[i]);
- } else {
- get_page(smc->conn.rmb_desc->pages);
- }
+ if (bytes > 0)
atomic_add(bytes, &smc->conn.splice_pending);
- }
kfree(priv);
kfree(partial);
kfree(pages);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 142/181] ipv6: prevent in6_dev_get() from resurrecting inet6_dev
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (140 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 141/181] net: smc: fix splice entry lifetime imbalance in smc_rx_splice Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 143/181] netfilter: bridge: release template ct on non-IP path Greg Kroah-Hartman
` (41 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kyle Zeng, David Lee, Ido Schimmel,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kyle Zeng <kylebot@openai.com>
commit 0e243671bc7b8eaf00f83dd2f4367436dc0cff98 upstream.
in6_dev_get() reads dev->ip6_ptr under RCU and then unconditionally
increments its refcount. Device teardown can clear the pointer and drop
the last reference between these operations. The increment then
resurrects an object whose RCU free has already been queued, so callers
can use it after it is freed.
Use refcount_inc_not_zero() and return NULL when the object has already
reached zero. RCU keeps the memory accessible through the attempted
reference acquisition, and a successful increment pins the object for
the caller.
An independent run on the exact unpatched 6f5156d7a31a (v7.2-rc3)
kernel reproduced the invalid reference acquisition as UID 1000:
refcount_t: addition on 0; use-after-free.
ip6_mc_source+0xef4/0x17e0
It was followed by the corresponding reference underflow in
ip6_mc_source(). The supplied trace from the same unpatched revision
additionally shows the access after the RCU read-side section ends:
BUG: KASAN: slab-use-after-free in mutex_lock+0x76/0xe0
Write of size 8 at addr ffff888015b50240 by task poc/1219
Bug found and triaged by OpenAI Security Research and
validated by Trail of Bits.
Fixes: 8814c4b53381 ("[IPV6] ADDRCONF: Convert addrconf_lock to RCU.")
Cc: stable@vger.kernel.org
Signed-off-by: Kyle Zeng <kylebot@openai.com>
Co-developed-by: David Lee <david.lee@trailofbits.com>
Signed-off-by: David Lee <david.lee@trailofbits.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260803122758.666112-1-david.lee@trailofbits.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/addrconf.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -382,8 +382,8 @@ static inline struct inet6_dev *in6_dev_
rcu_read_lock();
idev = rcu_dereference(dev->ip6_ptr);
- if (idev)
- refcount_inc(&idev->refcnt);
+ if (idev && !refcount_inc_not_zero(&idev->refcnt))
+ idev = NULL;
rcu_read_unlock();
return idev;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 143/181] netfilter: bridge: release template ct on non-IP path
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (141 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 142/181] ipv6: prevent in6_dev_get() from resurrecting inet6_dev Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 144/181] netfilter: nf_conntrack: defer invalid log until after unlock Greg Kroah-Hartman
` (40 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Vega, Zhiling Zou, Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhiling Zou <zhilinz@nebusec.ai>
commit d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f upstream.
A bridge nftables ct zone set rule can attach a conntrack template to
an skb before nf_ct_bridge_pre() sees it. For non-IPv4 and non-IPv6
EtherTypes, nf_ct_bridge_pre() currently overwrites skb->_nfct with
IP_CT_UNTRACKED without releasing the existing template reference.
That makes the per-cpu template, and any temporary templates allocated
for concurrent use, unreachable and leaks memory until the host runs out
of slab.
Reset the skb conntrack state before marking the frame untracked so the
existing template reference is dropped on the non-IP path.
Fixes: 3c171f496ef5 ("netfilter: bridge: add connection tracking system")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/bridge/netfilter/nf_conntrack_bridge.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/bridge/netfilter/nf_conntrack_bridge.c
+++ b/net/bridge/netfilter/nf_conntrack_bridge.c
@@ -281,6 +281,7 @@ static unsigned int nf_ct_bridge_pre(voi
ret = nf_ct_br_defrag6(skb, &bridge_state);
break;
default:
+ nf_reset_ct(skb);
nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
return NF_ACCEPT;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 144/181] netfilter: nf_conntrack: defer invalid log until after unlock
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (142 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 143/181] netfilter: bridge: release template ct on non-IP path Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:33 ` [PATCH 6.12 145/181] net: atlantic: free stranded TX buffers on ring deinit Greg Kroah-Hartman
` (39 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zihan Xi, Florian Westphal,
Pablo Neira Ayuso
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <zihanx@nebusec.ai>
commit 2d19b95c9723001f214f7a47d67b09f46238f200 upstream.
TCP and SCTP conntrack paths can emit invalid-packet logs while ct->lock
is still held.
When invalid logging is routed to nfnetlink_log and conntrack export is
enabled, the log path can re-enter conntrack netlink glue and dump the
same conntrack again. Protocol attribute dumping may take ct->lock, so
logging while holding that lock can deadlock.
Defer the TCP invalid logs by storing only the minimal log context while
ct->lock is held and emitting the log after unlocking. Also make the TCP
timeout-lowering invalid path return whether a log is needed, then emit
that log after unlocking.
Do the same for the SCTP invalid state-transition log that can be reached
while ct->lock is held.
Add a lockdep assertion to nf_ct_l4proto_log_invalid() so future callers
that log invalid conntracks while holding ct->lock are caught outside TCP
and SCTP as well.
Fixes: 628d694344a0 ("netfilter: conntrack: reduce timeout when receiving out-of-window fin or rst")
Fixes: d9a6f0d0df18 ("netfilter: conntrack: prepare tcp_in_window for ternary return value")
Fixes: f71cb8f45d09 ("netfilter: conntrack: sctp: use nf log infrastructure for invalid packets")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: Codex:gpt-5.4
Signed-off-by: Zihan Xi <zihanx@nebusec.ai>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/nf_conntrack_proto.c | 6 +
net/netfilter/nf_conntrack_proto_sctp.c | 12 +-
net/netfilter/nf_conntrack_proto_tcp.c | 132 +++++++++++++++++++++-----------
3 files changed, 102 insertions(+), 48 deletions(-)
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -79,6 +79,12 @@ void nf_ct_l4proto_log_invalid(const str
struct net *net;
va_list args;
+ /* nfnetlink_log may re-enter conntrack attribute dumping and try to
+ * take ct->lock again via helpers such as tcp_to_nlattr(), so invalid
+ * conntrack logs must only be emitted after dropping ct->lock.
+ */
+ lockdep_assert_not_held(&ct->lock);
+
net = nf_ct_net(ct);
if (likely(net->ct.sysctl_log_invalid == 0))
return;
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -341,10 +341,12 @@ int nf_conntrack_sctp_packet(struct nf_c
struct sctphdr _sctph;
const struct sctp_chunkhdr *sch;
struct sctp_chunkhdr _sch;
+ bool log_invalid = false;
u_int32_t offset, count;
unsigned int *timeouts;
unsigned long map[256 / sizeof(unsigned long)] = { 0 };
bool ignore = false;
+ u8 invalid_type = 0;
if (sctp_error(skb, dataoff, state))
return -NF_ACCEPT;
@@ -456,10 +458,8 @@ int nf_conntrack_sctp_packet(struct nf_c
/* Invalid */
if (new_state == SCTP_CONNTRACK_MAX) {
- nf_ct_l4proto_log_invalid(skb, ct, state,
- "Invalid, old_state %d, dir %d, type %d",
- old_state, dir, sch->type);
-
+ log_invalid = true;
+ invalid_type = sch->type;
goto out_unlock;
}
@@ -534,6 +534,10 @@ int nf_conntrack_sctp_packet(struct nf_c
out_unlock:
spin_unlock_bh(&ct->lock);
+ if (log_invalid)
+ nf_ct_l4proto_log_invalid(skb, ct, state,
+ "Invalid, old_state %d, dir %d, type %d",
+ old_state, dir, invalid_type);
out:
return -NF_ACCEPT;
}
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -480,37 +480,81 @@ static void tcp_init_sender(struct ip_ct
}
}
-__printf(6, 7)
-static enum nf_ct_tcp_action nf_tcp_log_invalid(const struct sk_buff *skb,
- const struct nf_conn *ct,
- const struct nf_hook_state *state,
- const struct ip_ct_tcp_state *sender,
- enum nf_ct_tcp_action ret,
- const char *fmt, ...)
+enum nf_tcp_invalid_log_type {
+ NF_TCP_LOG_NONE,
+ NF_TCP_LOG_OVERSHOT,
+ NF_TCP_LOG_SEQ_OVER,
+ NF_TCP_LOG_ACK_OVER,
+ NF_TCP_LOG_SEQ_UNDER,
+ NF_TCP_LOG_ACK_UNDER,
+};
+
+struct nf_tcp_invalid_log {
+ enum nf_tcp_invalid_log_type type;
+ u32 value;
+};
+
+static enum nf_ct_tcp_action
+nf_tcp_store_invalid(const struct nf_conn *ct,
+ const struct ip_ct_tcp_state *sender,
+ struct nf_tcp_invalid_log *log,
+ enum nf_ct_tcp_action ret,
+ enum nf_tcp_invalid_log_type type,
+ u32 value)
{
const struct nf_tcp_net *tn = nf_tcp_pernet(nf_ct_net(ct));
- struct va_format vaf;
- va_list args;
bool be_liberal;
be_liberal = sender->flags & IP_CT_TCP_FLAG_BE_LIBERAL || tn->tcp_be_liberal;
if (be_liberal)
return NFCT_TCP_ACCEPT;
- va_start(args, fmt);
- vaf.fmt = fmt;
- vaf.va = &args;
- nf_ct_l4proto_log_invalid(skb, ct, state, "%pV", &vaf);
- va_end(args);
-
+ log->type = type;
+ log->value = value;
return ret;
}
+static void nf_tcp_log_invalid(const struct sk_buff *skb,
+ const struct nf_conn *ct,
+ const struct nf_hook_state *state,
+ const struct nf_tcp_invalid_log *log)
+{
+ switch (log->type) {
+ case NF_TCP_LOG_OVERSHOT:
+ nf_ct_l4proto_log_invalid(skb, ct, state,
+ "%u bytes more than expected",
+ log->value);
+ break;
+ case NF_TCP_LOG_SEQ_OVER:
+ nf_ct_l4proto_log_invalid(skb, ct, state,
+ "SEQ is over upper bound %u (over the window of the receiver)",
+ log->value);
+ break;
+ case NF_TCP_LOG_ACK_OVER:
+ nf_ct_l4proto_log_invalid(skb, ct, state,
+ "ACK is over upper bound %u (ACKed data not seen yet)",
+ log->value);
+ break;
+ case NF_TCP_LOG_SEQ_UNDER:
+ nf_ct_l4proto_log_invalid(skb, ct, state,
+ "SEQ is under lower bound %u (already ACKed data retransmitted)",
+ log->value);
+ break;
+ case NF_TCP_LOG_ACK_UNDER:
+ nf_ct_l4proto_log_invalid(skb, ct, state,
+ "ignored ACK under lower bound %u (possible overly delayed)",
+ log->value);
+ break;
+ case NF_TCP_LOG_NONE:
+ break;
+ }
+}
+
static enum nf_ct_tcp_action
tcp_in_window(struct nf_conn *ct, enum ip_conntrack_dir dir,
unsigned int index, const struct sk_buff *skb,
unsigned int dataoff, const struct tcphdr *tcph,
- const struct nf_hook_state *hook_state)
+ struct nf_tcp_invalid_log *log)
{
struct ip_ct_tcp *state = &ct->proto.tcp;
struct ip_ct_tcp_state *sender = &state->seen[dir];
@@ -640,31 +684,29 @@ tcp_in_window(struct nf_conn *ct, enum i
sender->td_end = end;
sender->flags |= IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED;
- return nf_tcp_log_invalid(skb, ct, hook_state, sender, NFCT_TCP_IGNORE,
- "%u bytes more than expected", overshot);
+ return nf_tcp_store_invalid(ct, sender, log, NFCT_TCP_IGNORE,
+ NF_TCP_LOG_OVERSHOT, overshot);
}
- return nf_tcp_log_invalid(skb, ct, hook_state, sender, NFCT_TCP_INVALID,
- "SEQ is over upper bound %u (over the window of the receiver)",
- sender->td_maxend + 1);
+ return nf_tcp_store_invalid(ct, sender, log, NFCT_TCP_INVALID,
+ NF_TCP_LOG_SEQ_OVER, sender->td_maxend + 1);
}
if (!before(sack, receiver->td_end + 1))
- return nf_tcp_log_invalid(skb, ct, hook_state, sender, NFCT_TCP_INVALID,
- "ACK is over upper bound %u (ACKed data not seen yet)",
- receiver->td_end + 1);
+ return nf_tcp_store_invalid(ct, sender, log, NFCT_TCP_INVALID,
+ NF_TCP_LOG_ACK_OVER, receiver->td_end + 1);
/* Is the ending sequence in the receive window (if available)? */
in_recv_win = !receiver->td_maxwin ||
after(end, sender->td_end - receiver->td_maxwin - 1);
if (!in_recv_win)
- return nf_tcp_log_invalid(skb, ct, hook_state, sender, NFCT_TCP_IGNORE,
- "SEQ is under lower bound %u (already ACKed data retransmitted)",
- sender->td_end - receiver->td_maxwin - 1);
+ return nf_tcp_store_invalid(ct, sender, log, NFCT_TCP_IGNORE,
+ NF_TCP_LOG_SEQ_UNDER,
+ sender->td_end - receiver->td_maxwin - 1);
if (!after(sack, receiver->td_end - MAXACKWINDOW(sender) - 1))
- return nf_tcp_log_invalid(skb, ct, hook_state, sender, NFCT_TCP_IGNORE,
- "ignored ACK under lower bound %u (possible overly delayed)",
- receiver->td_end - MAXACKWINDOW(sender) - 1);
+ return nf_tcp_store_invalid(ct, sender, log, NFCT_TCP_IGNORE,
+ NF_TCP_LOG_ACK_UNDER,
+ receiver->td_end - MAXACKWINDOW(sender) - 1);
/* Take into account window scaling (RFC 1323). */
if (!tcph->syn)
@@ -719,11 +761,8 @@ tcp_in_window(struct nf_conn *ct, enum i
return NFCT_TCP_ACCEPT;
}
-static void __cold nf_tcp_handle_invalid(struct nf_conn *ct,
- enum ip_conntrack_dir dir,
- int index,
- const struct sk_buff *skb,
- const struct nf_hook_state *hook_state)
+static bool __cold
+nf_tcp_handle_invalid(struct nf_conn *ct, enum ip_conntrack_dir dir, int index)
{
const unsigned int *timeouts;
const struct nf_tcp_net *tn;
@@ -732,7 +771,7 @@ static void __cold nf_tcp_handle_invalid
if (!test_bit(IPS_ASSURED_BIT, &ct->status) ||
test_bit(IPS_FIXED_TIMEOUT_BIT, &ct->status))
- return;
+ return false;
/* We don't want to have connections hanging around in ESTABLISHED
* state for long time 'just because' conntrack deemed a FIN/RST
@@ -747,7 +786,7 @@ static void __cold nf_tcp_handle_invalid
case TCP_FIN_SET:
break;
default:
- return;
+ return false;
}
if (ct->proto.tcp.last_dir != dir &&
@@ -755,7 +794,7 @@ static void __cold nf_tcp_handle_invalid
ct->proto.tcp.last_index == TCP_RST_SET)) {
expires = nf_ct_expires(ct);
if (expires < 120 * HZ)
- return;
+ return false;
tn = nf_tcp_pernet(nf_ct_net(ct));
timeouts = nf_ct_timeout_lookup(ct);
@@ -764,16 +803,15 @@ static void __cold nf_tcp_handle_invalid
timeout = READ_ONCE(timeouts[TCP_CONNTRACK_UNACK]);
if (expires > timeout) {
- nf_ct_l4proto_log_invalid(skb, ct, hook_state,
- "packet (index %d, dir %d) response for index %d lower timeout to %u",
- index, dir, ct->proto.tcp.last_index, timeout);
-
WRITE_ONCE(ct->timeout, timeout + nfct_time_stamp);
+ return true;
}
} else {
ct->proto.tcp.last_index = index;
ct->proto.tcp.last_dir = dir;
}
+
+ return false;
}
/* table of valid flag combinations - PUSH, ECE and CWR are always valid */
@@ -969,7 +1007,9 @@ int nf_conntrack_tcp_packet(struct nf_co
struct net *net = nf_ct_net(ct);
struct nf_tcp_net *tn = nf_tcp_pernet(net);
enum tcp_conntrack new_state, old_state;
+ struct nf_tcp_invalid_log log = {};
unsigned int index, *timeouts;
+ bool lowered_timeout = false;
enum nf_ct_tcp_action res;
enum ip_conntrack_dir dir;
const struct tcphdr *th;
@@ -1252,14 +1292,18 @@ int nf_conntrack_tcp_packet(struct nf_co
}
res = tcp_in_window(ct, dir, index,
- skb, dataoff, th, state);
+ skb, dataoff, th, &log);
switch (res) {
case NFCT_TCP_IGNORE:
spin_unlock_bh(&ct->lock);
+ nf_tcp_log_invalid(skb, ct, state, &log);
return NF_ACCEPT;
case NFCT_TCP_INVALID:
- nf_tcp_handle_invalid(ct, dir, index, skb, state);
+ lowered_timeout = nf_tcp_handle_invalid(ct, dir, index);
spin_unlock_bh(&ct->lock);
+ nf_tcp_log_invalid(skb, ct, state, &log);
+ if (lowered_timeout)
+ nf_ct_l4proto_log_invalid(skb, ct, state, "lowered timeout to UNACK");
return -NF_ACCEPT;
case NFCT_TCP_ACCEPT:
break;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 145/181] net: atlantic: free stranded TX buffers on ring deinit
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (143 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 144/181] netfilter: nf_conntrack: defer invalid log until after unlock Greg Kroah-Hartman
@ 2026-08-17 13:33 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 146/181] net: atlantic: free RX pages of consumed but not refilled buffers Greg Kroah-Hartman
` (38 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sukhdeep Singh, Yangyu Chen,
Mina Almasry, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yangyu Chen <cyy@cyyself.name>
commit 452636ea5410a96e02ebaaf80b21e3620b98e0dd upstream.
aq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean()
call, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and
stops at hw_head, which no longer moves once aq_vec_stop() has stopped
the hardware and NAPI. Completed descriptors beyond the budget and
everything still posted in [hw_head, sw_tail) keep their skb or
xdp_frame when the interface goes down: aq_vec_ring_free() then frees
the buffer ring and the references are lost for good.
Today this is a silent memory leak on every interface down under
TX/XDP_TX load. With the conversion of the RX path to page_pool posted
for net-next it becomes much more visible: XDP_TX frames carry fragment
references on the RX ring's page_pool, so a single stranded frame keeps
the pool's inflight count above zero forever. page_pool_destroy() then
never completes, the pool is leaked together with its pages, and
"page_pool_release_retry() stalled pool shutdown" is warned every 60
seconds from that point on, on every ifdown, XDP detach or ring resize
under XDP_TX load.
Bring back aq_ring_tx_deinit() as it was before the removal and use it
for teardown again, with one extension: TX rings can hold xdp_frames
nowadays, so release those too. They are returned with
xdp_return_frame() since this runs in process context.
Fixes: eb36bedf28be ("net: aquantia: remove function aq_ring_tx_deinit")
Cc: stable@vger.kernel.org # v4.11+
Reviewed-by: Sukhdeep Singh <sukhdeeps@marvell.com>
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/tencent_EEDC35FAF2750A3A6A0B39BAE0E2C484860A@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/aquantia/atlantic/aq_ring.c | 29 +++++++++++++++++++++++
drivers/net/ethernet/aquantia/atlantic/aq_ring.h | 1
drivers/net/ethernet/aquantia/atlantic/aq_vec.c | 2 -
3 files changed, 31 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
@@ -336,6 +336,35 @@ out:
return !!budget;
}
+void aq_ring_tx_deinit(struct aq_ring_s *self)
+{
+ if (!self)
+ return;
+
+ for (; self->sw_head != self->sw_tail;
+ self->sw_head = aq_ring_next_dx(self, self->sw_head)) {
+ struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
+ struct device *ndev = aq_nic_get_dev(self->aq_nic);
+
+ if (buff->is_mapped) {
+ if (buff->is_sop) {
+ dma_unmap_single(ndev, buff->pa, buff->len,
+ DMA_TO_DEVICE);
+ } else {
+ dma_unmap_page(ndev, buff->pa, buff->len,
+ DMA_TO_DEVICE);
+ }
+ }
+
+ if (buff->is_eop) {
+ if (buff->skb)
+ dev_kfree_skb_any(buff->skb);
+ else if (buff->xdpf)
+ xdp_return_frame(buff->xdpf);
+ }
+ }
+}
+
static void aq_rx_checksum(struct aq_ring_s *self,
struct aq_ring_buff_s *buff,
struct sk_buff *skb)
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
@@ -199,6 +199,7 @@ void aq_ring_update_queue_state(struct a
void aq_ring_queue_wake(struct aq_ring_s *ring);
void aq_ring_queue_stop(struct aq_ring_s *ring);
bool aq_ring_tx_clean(struct aq_ring_s *self);
+void aq_ring_tx_deinit(struct aq_ring_s *self);
int aq_xdp_xmit(struct net_device *dev, int num_frames,
struct xdp_frame **frames, u32 flags);
int aq_ring_rx_clean(struct aq_ring_s *self,
--- a/drivers/net/ethernet/aquantia/atlantic/aq_vec.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_vec.c
@@ -275,7 +275,7 @@ void aq_vec_deinit(struct aq_vec_s *self
for (i = 0U; self->tx_rings > i; ++i) {
ring = self->ring[i];
- aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
+ aq_ring_tx_deinit(&ring[AQ_VEC_TX_ID]);
aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 146/181] net: atlantic: free RX pages of consumed but not refilled buffers
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (144 preceding siblings ...)
2026-08-17 13:33 ` [PATCH 6.12 145/181] net: atlantic: free stranded TX buffers on ring deinit Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 147/181] net/sched: act_ct: fix sk_buff leak when the header checks reject a packet Greg Kroah-Hartman
` (37 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sukhdeep Singh, Yangyu Chen,
Mina Almasry, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yangyu Chen <cyy@cyyself.name>
commit e8e7471ef686b6c002218fee9671cc61992ae01a upstream.
aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to
hardware. Since the page reuse strategy was added, a cleaned RX buffer
keeps its page (and its DMA mapping) in the ring for reuse, and refill
is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES
slots are free. Slots that were consumed but not yet reposted therefore
sit in the complementary [sw_tail, sw_head) gap with a live page, and
the deinit walk never visits them: up to a refill batch worth of pages
and DMA mappings leak on every interface down.
Walk the whole ring instead and release whatever is still there. Also
bail out if the buffer ring is already gone: a partial
aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so
aq_ptp_ring_deinit() still gets here on the unwind path.
Cc: stable@vger.kernel.org # v5.2+
Fixes: 46f4c29d9de6 ("net: aquantia: optimize rx performance by page reuse strategy")
Reviewed-by: Sukhdeep Singh <sukhdeeps@marvell.com>
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/tencent_607CBA8237DA438E36B844318B21538DE008@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/aquantia/atlantic/aq_ring.c | 22 ++++++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
@@ -926,15 +926,29 @@ err_exit:
void aq_ring_rx_deinit(struct aq_ring_s *self)
{
- if (!self)
+ unsigned int i;
+
+ if (!self || !self->buff_ring)
return;
- for (; self->sw_head != self->sw_tail;
- self->sw_head = aq_ring_next_dx(self, self->sw_head)) {
- struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
+ /* Release every page still owned by the ring.
+ *
+ * Walking [sw_head, sw_tail) is not enough: refill is batched
+ * (aq_ring_rx_fill() waits for AQ_CFG_RX_REFILL_THRES free slots),
+ * so slots that were cleaned but not yet reposted accumulate in the
+ * [sw_tail, sw_head) gap, and they keep their page for reuse. Walk
+ * the whole ring and release whatever is left.
+ */
+ for (i = 0; i < self->size; i++) {
+ struct aq_ring_buff_s *buff = &self->buff_ring[i];
+
+ if (!buff->rxdata.page)
+ continue;
aq_free_rxpage(&buff->rxdata, aq_nic_get_dev(self->aq_nic));
}
+
+ self->sw_head = self->sw_tail;
}
void aq_ring_free(struct aq_ring_s *self)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 147/181] net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (145 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 146/181] net: atlantic: free RX pages of consumed but not refilled buffers Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 148/181] net/sched: act_gact, act_police: range check the fallback control action Greg Kroah-Hartman
` (36 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Hyunjung Ko, Jamal Hadi Salim,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hyunjung Ko <hj351016@gmail.com>
commit 8a7ed561671aa6a911a2de99e59ef670a4d0b1df upstream.
tcf_ct_handle_fragments() runs its header sanity checks before handing
anything to the defragmentation engine:
if (family == NFPROTO_IPV4)
err = tcf_ct_ipv4_is_fragment(skb, &frag);
else
err = tcf_ct_ipv6_is_fragment(skb, &frag);
if (err || !frag)
return err;
tcf_ct_ipv4_is_fragment() returns -EINVAL or -ENOMEM;
tcf_ct_ipv6_is_fragment() adds -EPROTO when ipv6_find_hdr() fails. None of
them frees or queues the skb, so on that path the caller still owns it.
tcf_ct_act() however funnels every non-zero return into the
ownership-transfer exit:
err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag);
if (err)
goto out_frag;
...
out_frag:
if (err != -EINPROGRESS)
tcf_action_inc_drop_qstats(&c->common);
return TC_ACT_CONSUMED;
TC_ACT_CONSUMED means the action took ownership of the skb, so no caller
frees it - sch_handle_ingress(), sch_handle_egress() and
tcf_qevent_handle() all deliberately skip the free for that verdict. The
skb is therefore orphaned: one sk_buff plus its data buffer is leaked per
malformed packet, unbounded. Note the drop counter is already incremented
for these errors, so the statistics claim a drop that never happens.
Three different ownership states reach out_frag: today - the skb may be
queued by the defrag engine (-EINPROGRESS), already freed by
nf_ct_handle_fragments(), or still owned by us. Tell the caller which of
those it is, and free the packet ourselves in the last case, which
restores the TC_ACT_SHOT behaviour that predated the Fixes: commit.
Reproduced on v7.2-rc6 with a 54-byte frame carrying a 40-byte IPv6
header with nexthdr = 0 (hop-by-hop) and nothing after it, on a
clsact ingress chain with "action ct". kmemleak reports one leaked
232-byte skbuff_head_cache object plus its 704-byte data buffer per
packet; with this patch it reports none.
Fixes: 3f14b377d01d ("net/sched: act_ct: fix skb leak and crash on ooo frags")
Cc: stable@vger.kernel.org # v6.8+
Signed-off-by: Hyunjung Ko <hj351016@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20260806101235.809370-1-hj351016@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sched/act_ct.c | 29 +++++++++++++++++++++++++----
1 file changed, 25 insertions(+), 4 deletions(-)
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -838,8 +838,15 @@ static int tcf_ct_ipv6_is_fragment(struc
return 0;
}
+/* On error, tells the caller whether it still owns @skb and must free it
+ * itself. @skb is ours only when the header checks below reject the packet
+ * before it is handed to the defragmentation engine; once nf_ct_handle_
+ * fragments() has been called the skb is either queued (-EINPROGRESS) or has
+ * already been freed by it.
+ */
static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb,
- u8 family, u16 zone, bool *defrag)
+ u8 family, u16 zone, bool *defrag,
+ bool *skb_is_ours)
{
enum ip_conntrack_info ctinfo;
struct tc_skb_cb cb;
@@ -857,8 +864,12 @@ static int tcf_ct_handle_fragments(struc
err = tcf_ct_ipv4_is_fragment(skb, &frag);
else
err = tcf_ct_ipv6_is_fragment(skb, &frag);
- if (err || !frag)
+ if (err) {
+ *skb_is_ours = true;
return err;
+ }
+ if (!frag)
+ return 0;
cb = *tc_skb_cb(skb);
err = nf_ct_handle_fragments(net, skb, zone, family, &proto, &cb.mru);
@@ -975,6 +986,7 @@ TC_INDIRECT_SCOPE int tcf_ct_act(struct
int nh_ofs, err, retval;
struct tcf_ct_params *p;
bool add_helper = false;
+ bool skb_is_ours = false;
bool skip_add = false;
bool defrag = false;
struct nf_conn *ct;
@@ -1010,9 +1022,18 @@ TC_INDIRECT_SCOPE int tcf_ct_act(struct
*/
nh_ofs = skb_network_offset(skb);
skb_pull_rcsum(skb, nh_ofs);
- err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag);
- if (err)
+ err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag,
+ &skb_is_ours);
+ if (err) {
+ /* The skb is still ours only when the header checks rejected
+ * it; returning TC_ACT_CONSUMED for such a packet would leak
+ * it, since no caller frees an skb it was told it no longer
+ * owns.
+ */
+ if (skb_is_ours)
+ goto drop;
goto out_frag;
+ }
err = nf_ct_skb_network_trim(skb, family);
if (err)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 148/181] net/sched: act_gact, act_police: range check the fallback control action
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (146 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 147/181] net/sched: act_ct: fix sk_buff leak when the header checks reject a packet Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 149/181] ovl: dont warn when the mount is completed from another user namespace Greg Kroah-Hartman
` (35 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Hyunjung Ko, Jamal Hadi Salim,
Victor Nogueira, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hyunjung Ko <hj351016@gmail.com>
commit 883b56ae58fe657d8497806c7059646e9ba6dbd0 upstream.
tcf_action_check_ctrlact() range checks the primary control action:
if (!opcode)
ret = action > TC_ACT_VALUE_MAX ? -EINVAL : 0;
TC_ACT_VALUE_MAX is TC_ACT_TRAP, so kernel-internal verdicts above it
cannot be set that way. But act_gact and act_police each carry a second,
independent control action supplied by user space that never reaches that
helper - TCA_GACT_PROB.paction and TCA_POLICE_RESULT. Both only reject
TC_ACT_GOTO_CHAIN, so any other value is stored verbatim and returned
verbatim from the action.
In particular user space can store TC_ACT_CONSUMED, which is
TC_ACT_VALUE_MAX + 1 and is deliberately not part of the UAPI value
range. That verdict tells every caller the action took ownership of the
skb, so nobody frees it: sch_handle_ingress(), sch_handle_egress() and
tcf_qevent_handle() all deliberately skip the free for it. The result is
one leaked sk_buff plus its data buffer per packet traversing the filter,
unbounded, for all traffic on the chain including kernel-generated
packets.
Both are trivially deterministic. act_gact clamps tcfg_pval to >= 1, so
with pval = 1 gact_determ() returns the fallback for every packet.
act_police has no mandatory rate, so rate = 0 leaves tcfp_mtu = ~0 and
tcf_police_mtu_check() always passes.
TC_ACT_CONSUMED was added by commit 720f22fed81b ("net: sched: refactor
reinsert action"), after both goto-chain guards were written:
commit 9469f375ab09 ("net/sched: act_gact: disallow 'goto chain' on
fallback control action") and
commit c08f5ed5d625 ("net/sched: act_police: disallow 'goto chain' on
fallback control action"). Neither guard was widened when the new
verdict appeared.
Factor the existing range test out of tcf_action_check_ctrlact() as
tcf_action_valid() and apply it to both fallbacks. The helper cannot call
tcf_action_check_ctrlact() directly because that also allocates a
goto_chain, which is exactly what these two sites must not do.
Reproduced on v7.2-rc6: kmemleak reports one leaked 232-byte
skbuff_head_cache object plus its 704-byte data buffer per packet. With
this patch both configurations are rejected with -EINVAL and kmemleak
reports none.
Fixes: 720f22fed81b ("net: sched: refactor reinsert action")
Cc: stable@vger.kernel.org # v5.3+
Signed-off-by: Hyunjung Ko <hj351016@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Tested-by: Victor Nogueira <victor@mojatatu.com>
Link: https://patch.msgid.link/20260806101252.809593-1-hj351016@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/net/act_api.h | 19 +++++++++++++++++++
net/sched/act_gact.c | 5 +++++
net/sched/act_police.c | 6 ++++++
3 files changed, 30 insertions(+)
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -270,6 +270,25 @@ int tcf_action_check_ctrlact(int action,
struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
struct tcf_chain *newchain);
+/* Range check for a control action supplied by user space.
+ *
+ * This is the same test tcf_action_check_ctrlact() applies to the primary
+ * control action, factored out for the *fallback* control actions
+ * (act_gact's TCA_GACT_PROB.paction and act_police's TCA_POLICE_RESULT),
+ * which must not reach tcf_action_check_ctrlact() because they have no
+ * goto_chain to allocate. Without it, user space can store kernel-internal
+ * verdicts such as TC_ACT_CONSUMED, which is TC_ACT_VALUE_MAX + 1 and is
+ * deliberately not part of the UAPI value range.
+ */
+static inline bool tcf_action_valid(int action)
+{
+ int opcode = TC_ACT_EXT_OPCODE(action);
+
+ if (!opcode)
+ return action <= TC_ACT_VALUE_MAX;
+ return opcode <= TC_ACT_EXT_OPCODE_MAX || action == TC_ACT_UNSPEC;
+}
+
#ifdef CONFIG_INET
DECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count);
#endif
--- a/net/sched/act_gact.c
+++ b/net/sched/act_gact.c
@@ -89,6 +89,11 @@ static int tcf_gact_init(struct net *net
p_parm = nla_data(tb[TCA_GACT_PROB]);
if (p_parm->ptype >= MAX_RAND)
return -EINVAL;
+ if (!tcf_action_valid(p_parm->paction)) {
+ NL_SET_ERR_MSG(extack,
+ "invalid fallback control action");
+ return -EINVAL;
+ }
if (TC_ACT_EXT_CMP(p_parm->paction, TC_ACT_GOTO_CHAIN)) {
NL_SET_ERR_MSG(extack,
"goto chain not allowed on fallback");
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -128,6 +128,12 @@ static int tcf_police_init(struct net *n
if (tb[TCA_POLICE_RESULT]) {
tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
+ if (!tcf_action_valid(tcfp_result)) {
+ NL_SET_ERR_MSG(extack,
+ "invalid fallback control action");
+ err = -EINVAL;
+ goto failure;
+ }
if (TC_ACT_EXT_CMP(tcfp_result, TC_ACT_GOTO_CHAIN)) {
NL_SET_ERR_MSG(extack,
"goto chain not allowed on fallback");
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 149/181] ovl: dont warn when the mount is completed from another user namespace
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (147 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 148/181] net/sched: act_gact, act_police: range check the fallback control action Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 150/181] binfmt_misc: " Greg Kroah-Hartman
` (34 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jan Kara,
Christian Brauner (Amutable)
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Brauner <brauner@kernel.org>
commit 63981fc786daaa626cb14d9be1406f674d79f98f upstream.
fsopen() records the caller's user namespace in fc->user_ns and hands
back an ordinary file descriptor. Nothing ties the task that calls
fsconfig(FSCONFIG_CMD_CREATE) to the task that created the context. The
fd is inherited across fork() and exec() and it can be passed over a
unix socket.
Completing a context from another user namespace is allowed on purpose.
vfs_cmd_create() authorizes the create with mount_capable(), which for
FS_USERNS_MOUNT checks ns_capable(fc->user_ns, CAP_SYS_ADMIN), and that
succeeds for a task holding CAP_SYS_ADMIN in an ancestor of fc->user_ns.
So an unprivileged task can reach the WARN_ON() in ovl_fill_super():
create a user and a mount namespace in a child, call fsopen("overlay")
there, send the fscontext fd to the parent and let the parent issue
FSCONFIG_CMD_CREATE. Both namespaces come from a plain unshare(1) and no
capability is needed anywhere:
WARNING: fs/overlayfs/super.c:1551 at ovl_fill_super+0x7b9/0x1e20 [overlay]
CPU: 3 UID: 1000 PID: 3243376 Comm: fswarn
Call Trace:
get_tree_nodev+0x71/0xa0
ovl_get_tree+0x15/0x20 [overlay]
vfs_get_tree+0x2a/0x100
vfs_cmd_create+0x60/0xf0
__do_sys_fsconfig+0x4b2/0x500
The child needs the mount namespace because fsopen() itself gates on
may_mount(), which asks for CAP_SYS_ADMIN in the user namespace owning
the caller's mount namespace. fsconfig() doesn't repeat that check.
It is a WARN_ON() and not a WARN_ON_ONCE(), so the condition can be
raised in a loop to taint the kernel and flood the log, and it panics a
kernel booted with panic_on_warn.
Keep refusing the mount and stop warning about it. ovl_parse_param()
already spells a user namespace check this way for Opt_override_creds.
Fixes: 1784fbc2ed9c ("ovl: port to new mount api")
Cc: stable@vger.kernel.org # v6.5+
Link: https://patch.msgid.link/20260802-work-fill_super-warn-v1-1-4e987911a39a@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/overlayfs/super.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1299,7 +1299,8 @@ int ovl_fill_super(struct super_block *s
int err;
err = -EIO;
- if (WARN_ON(fc->user_ns != current_user_ns()))
+ /* The fscontext fd may have been passed to another user namespace. */
+ if (fc->user_ns != current_user_ns())
goto out_err;
sb->s_d_op = &ovl_dentry_operations;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 150/181] binfmt_misc: dont warn when the mount is completed from another user namespace
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (148 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 149/181] ovl: dont warn when the mount is completed from another user namespace Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 151/181] Revert "drm/amdgpu: fix aperture mapping leak" Greg Kroah-Hartman
` (33 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jan Kara,
Christian Brauner (Amutable)
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Brauner <brauner@kernel.org>
commit 79fdf39f1a31f88cb3833b6f8091fbf6acdca2c6 upstream.
fsopen() records the caller's user namespace in fc->user_ns and hands
back an ordinary file descriptor. Nothing ties the task that calls
fsconfig(FSCONFIG_CMD_CREATE) to the task that created the context. The
fd is inherited across fork() and exec() and it can be passed over a
unix socket.
Completing a context from another user namespace is allowed on purpose.
vfs_cmd_create() authorizes the create with mount_capable(), which for
FS_USERNS_MOUNT checks ns_capable(fc->user_ns, CAP_SYS_ADMIN), and that
succeeds for a task holding CAP_SYS_ADMIN in an ancestor of fc->user_ns.
So an unprivileged task can reach the WARN_ON() in bm_fill_super():
create a user and a mount namespace in a child, call
fsopen("binfmt_misc") there, send the fscontext fd to the parent and let
the parent issue FSCONFIG_CMD_CREATE. Both namespaces come from a plain
unshare(1) and no capability is needed anywhere:
WARNING: fs/binfmt_misc.c:938 at bm_fill_super+0xa2/0xc0 [binfmt_misc]
CPU: 15 UID: 1000 PID: 3243382 Comm: fswarn
Call Trace:
get_tree_keyed+0x7d/0xb0
bm_get_tree+0x34/0x90 [binfmt_misc]
vfs_get_tree+0x2a/0x100
vfs_cmd_create+0x60/0xf0
__do_sys_fsconfig+0x4b2/0x500
The child needs the mount namespace because fsopen() itself gates on
may_mount(), which asks for CAP_SYS_ADMIN in the user namespace owning
the caller's mount namespace. fsconfig() doesn't repeat that check.
It is a WARN_ON() and not a WARN_ON_ONCE(), so the condition can be
raised in a loop to taint the kernel and flood the log, and it panics a
kernel booted with panic_on_warn.
Keep refusing the mount and stop warning about it. Nothing in
bm_fill_super() depends on the two namespaces matching, it derives
everything from sb->s_user_ns.
Fixes: 21ca59b365c0 ("binfmt_misc: enable sandboxed mounts")
Cc: stable@vger.kernel.org # v6.7+
Link: https://patch.msgid.link/20260802-work-fill_super-warn-v1-2-4e987911a39a@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/binfmt_misc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -983,7 +983,8 @@ static int bm_fill_super(struct super_bl
/* last one */ {""}
};
- if (WARN_ON(user_ns != current_user_ns()))
+ /* The fscontext fd may have been passed to another user namespace. */
+ if (user_ns != current_user_ns())
return -EINVAL;
/* Never exec off this instance and never let anything stack on it. */
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 151/181] Revert "drm/amdgpu: fix aperture mapping leak"
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (149 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 150/181] binfmt_misc: " Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 152/181] xdp: reject clones that overrun skb_shared_info tailroom Greg Kroah-Hartman
` (32 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Yuansheng Mao, Asad Kamal,
Lijo Lazar, Hawking Zhang, Alex Deucher
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Asad Kamal <asad.kamal@amd.com>
commit b96c529cd2551b78316a4afa3237b2ed96ba03c8 upstream.
devres teardown is LIFO. The aperture devres node was registered after
the DRM device node, so devres_release_all() unmaps the aperture before
the DRM device release callback fires amdgpu_device_fini_sw(). IP
sw_fini callbacks (e.g. vcn_v4_0_sw_fini) write to fw_shared through a
pointer derived from aper_base_kaddr, causing a kernel page fault on
probe failure / rollback:
BUG: unable to handle page fault ... PMD 0
RIP: vcn_v4_0_sw_fini+0x7b/0x170 [amdgpu]
Call Trace:
amdgpu_device_fini_sw
amdgpu_driver_release_kms
devm_drm_dev_init_release
devres_release_all
This reverts commit d871e99879cb5fd1fa798b006b4888887e63a17a.
Fixes: d871e99879cb ("drm/amdgpu: fix aperture mapping leak")
Reported-by: Yuansheng Mao <yuansheng.mao@amd.com>
Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 336e0cd576817ac64a4b394ca2b3680029f3e37f)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 35 +++++++++++++++--------------
2 files changed, 21 insertions(+), 16 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4635,6 +4635,8 @@ static void amdgpu_device_unmap_mmio(str
iounmap(adev->rmmio);
adev->rmmio = NULL;
+ if (adev->mman.aper_base_kaddr)
+ iounmap(adev->mman.aper_base_kaddr);
adev->mman.aper_base_kaddr = NULL;
/* Memory manager related */
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1909,23 +1909,17 @@ int amdgpu_ttm_init(struct amdgpu_device
/* Change the size here instead of the init above so only lpfn is affected */
amdgpu_ttm_set_buffer_funcs_status(adev, false);
#ifdef CONFIG_64BIT
- if (adev->gmc.xgmi.connected_to_cpu) {
- void *kaddr = devm_memremap(adev->dev, adev->gmc.aper_base,
- adev->gmc.visible_vram_size,
- MEMREMAP_WB);
- if (IS_ERR(kaddr))
- return PTR_ERR(kaddr);
- adev->mman.aper_base_kaddr = (__force void __iomem *)kaddr;
- } else if (adev->gmc.is_app_apu) {
+#ifdef CONFIG_X86
+ if (adev->gmc.xgmi.connected_to_cpu)
+ adev->mman.aper_base_kaddr = ioremap_cache(adev->gmc.aper_base,
+ adev->gmc.visible_vram_size);
+ else if (adev->gmc.is_app_apu)
DRM_DEBUG_DRIVER(
"No need to ioremap when real vram size is 0\n");
- } else {
- adev->mman.aper_base_kaddr = devm_ioremap_wc(adev->dev,
- adev->gmc.aper_base,
- adev->gmc.visible_vram_size);
- if (!adev->mman.aper_base_kaddr)
- return -ENOMEM;
- }
+ else
+#endif
+ adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
+ adev->gmc.visible_vram_size);
#endif
/*
@@ -2072,6 +2066,8 @@ int amdgpu_ttm_init(struct amdgpu_device
*/
void amdgpu_ttm_fini(struct amdgpu_device *adev)
{
+ int idx;
+
if (!adev->mman.initialized)
return;
@@ -2094,7 +2090,14 @@ void amdgpu_ttm_fini(struct amdgpu_devic
amdgpu_ttm_fw_reserve_vram_fini(adev);
amdgpu_ttm_drv_reserve_vram_fini(adev);
- adev->mman.aper_base_kaddr = NULL;
+ if (drm_dev_enter(adev_to_drm(adev), &idx)) {
+
+ if (adev->mman.aper_base_kaddr)
+ iounmap(adev->mman.aper_base_kaddr);
+ adev->mman.aper_base_kaddr = NULL;
+
+ drm_dev_exit(idx);
+ }
amdgpu_vram_mgr_fini(adev);
amdgpu_gtt_mgr_fini(adev);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 152/181] xdp: reject clones that overrun skb_shared_info tailroom
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (150 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 151/181] Revert "drm/amdgpu: fix aperture mapping leak" Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 153/181] vxlan: do not arm the ageing timer on a device that is down Greg Kroah-Hartman
` (31 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Vega, Zhiling Zou, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhiling Zou <zhilinz@nebusec.ai>
commit e48e8edbef2eb824201495daa5234560f632b23c upstream.
xdpf_clone() clones broadcast copies into a single page and sets
frame_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that
page like a normal XDP frame and expects the usual skb_shared_info
tailroom at the end of the buffer.
The current check only rejects frames whose linear xdp_frame header,
headroom, and packet data exceed PAGE_SIZE. A source frame backed by a
larger allocation can still satisfy that check while extending into the
clone's required shared-info area. When such a clone is converted back
into an skb, build_skb_around() places skb_shared_info over live packet
bytes and later writes can corrupt XDP return metadata.
Reject clones unless their linear area fits inside
SKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already
enforced by the XDP-to-skb conversion path.
Fixes: e624d4ed4aa8 ("xdp: Extend xdp_redirect_map with broadcast support")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai>
Link: https://patch.msgid.link/6b2afef5d1738763c6965e8e466eb16e43e4f956.1785757386.git.zhilinz@nebusec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/core/xdp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -731,7 +731,7 @@ struct xdp_frame *xdpf_clone(struct xdp_
headroom = xdpf->headroom + sizeof(*xdpf);
totalsize = headroom + xdpf->len;
- if (unlikely(totalsize > PAGE_SIZE))
+ if (unlikely(totalsize > SKB_WITH_OVERHEAD(PAGE_SIZE)))
return NULL;
page = dev_alloc_page();
if (!page)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 153/181] vxlan: do not arm the ageing timer on a device that is down
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (151 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 152/181] xdp: reject clones that overrun skb_shared_info tailroom Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 154/181] vsock/virtio: read virtqueues under worker locks Greg Kroah-Hartman
` (30 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Baul Lee, Ido Schimmel, Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baul Lee <baul.lee@xbow.com>
commit b37971686ec59fb027fa4910ba16805e68fddb97 upstream.
vxlan_changelink() arms vxlan->age_timer whenever the requested ageing
interval differs from the configured one:
if (conf.age_interval != vxlan->cfg.age_interval)
mod_timer(&vxlan->age_timer, jiffies);
There is no netif_running() test, so the timer is armed even on a device
that was never brought up. The only synchronous cancel in the driver is
the timer_delete_sync() in vxlan_stop(), which is .ndo_stop.
netif_close_many() drops devices without IFF_UP before
__dev_close_many() runs, so that cancel is skipped for such a device.
vxlan_setup() sets dev->needs_free_netdev = true and age_timer is a
member of struct vxlan_dev, so free_netdev() releases the allocation the
timer lives in while it is still queued on a timer_base.
expire_timers() unlinks the entry before it loads timer->function, so
the timer core writes through the freed object's list pointers:
BUG: KASAN: slab-use-after-free in __run_timers+0x208/0x654
Write of size 8 at addr ffff00001adace68 by task true/192
__asan_store8+0x84/0xac
__run_timers+0x208/0x654
run_timer_softirq+0x154/0x18c
Allocated by task 189:
alloc_netdev_mqs+0x64/0x720
rtnl_create_link+0x4ac/0x520
rtnl_newlink+0x758/0xd00
Freed by task 191:
netdev_release+0x40/0x58
netdev_run_todo+0x4a4/0x8c0
rtnl_dellink+0x200/0x4e8
The rtnl operations involved are netns-scoped, so an unprivileged user
can perform them in a new user and network namespace.
Arming the timer on a down device never had an effect: vxlan_cleanup()
returns early on !netif_running(), and vxlan_open() arms the timer for
any non-zero interval once the device is brought up. Add the missing
test.
Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
Fixes: 40051c4dcad5 ("vxlan: Allow changing ageing time")
Cc: stable@vger.kernel.org
Signed-off-by: Baul Lee <baul.lee@xbow.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260809111829.78834-1-baul.lee@xbow.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/vxlan/vxlan_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -4462,7 +4462,7 @@ static int vxlan_changelink(struct net_d
if (change_igmp && vxlan_addr_multicast(&dst->remote_ip))
err = vxlan_multicast_leave(vxlan);
- if (conf.age_interval != vxlan->cfg.age_interval)
+ if (netif_running(dev) && conf.age_interval != vxlan->cfg.age_interval)
mod_timer(&vxlan->age_timer, jiffies);
netdev_adjacent_change_commit(dst->remote_dev, lowerdev, dev);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 154/181] vsock/virtio: read virtqueues under worker locks
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (152 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 153/181] vxlan: do not arm the ageing timer on a device that is down Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 155/181] vsock/virtio: avoid refilling the RX queue after teardown Greg Kroah-Hartman
` (29 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Xiang Mei, Weiming Shi,
Bobby Eshleman, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Weiming Shi <bestswngs@gmail.com>
commit ebac8f6b1ef0e9278afe204b8692a7479988dace upstream.
Commit bd50c5dc182b ("vsock/virtio: add support for device
suspend/resume") made the *_run flags transition from false to true when
restore installs replacement virtqueues. The RX, TX and event workers
read their virtqueue before locking and checking the corresponding flag,
so a worker delayed across freeze and restore can observe the replacement
queue's running state while retaining a pointer to the deleted queue.
Read each virtqueue under its mutex after checking the run flag, keeping
the pointer and state in the same queue generation.
Fixes: bd50c5dc182b ("vsock/virtio: add support for device suspend/resume")
Cc: stable@vger.kernel.org
Reported-by: Xiang Mei <xmei5@asu.edu>
Link: https://lore.kernel.org/r/20260727035804.1860862-1-bestswngs@gmail.com
Signed-off-by: Weiming Shi <bestswngs@gmail.com>
Reviewed-by: Bobby Eshleman <bobbyeshleman@meta.com>
Link: https://patch.msgid.link/e79f68ad9284c983364fc3ac46904b6d9ef50231.1785352330.git.bestswngs@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/vmw_vsock/virtio_transport.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -343,12 +343,13 @@ static void virtio_transport_tx_work(str
struct virtqueue *vq;
bool added = false;
- vq = vsock->vqs[VSOCK_VQ_TX];
mutex_lock(&vsock->tx_lock);
if (!vsock->tx_run)
goto out;
+ vq = vsock->vqs[VSOCK_VQ_TX];
+
do {
struct sk_buff *skb;
unsigned int len;
@@ -448,13 +449,13 @@ static void virtio_transport_event_work(
container_of(work, struct virtio_vsock, event_work);
struct virtqueue *vq;
- vq = vsock->vqs[VSOCK_VQ_EVENT];
-
mutex_lock(&vsock->event_lock);
if (!vsock->event_run)
goto out;
+ vq = vsock->vqs[VSOCK_VQ_EVENT];
+
do {
struct virtio_vsock_event *event;
unsigned int len;
@@ -614,13 +615,13 @@ static void virtio_transport_rx_work(str
container_of(work, struct virtio_vsock, rx_work);
struct virtqueue *vq;
- vq = vsock->vqs[VSOCK_VQ_RX];
-
mutex_lock(&vsock->rx_lock);
if (!vsock->rx_run)
goto out;
+ vq = vsock->vqs[VSOCK_VQ_RX];
+
do {
virtqueue_disable_cb(vq);
for (;;) {
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 155/181] vsock/virtio: avoid refilling the RX queue after teardown
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (153 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 154/181] vsock/virtio: read virtqueues under worker locks Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 156/181] veth: fix skb length accounting after XDP frag adjustment Greg Kroah-Hartman
` (28 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Xiang Mei, Stefano Garzarella,
Weiming Shi, Bobby Eshleman, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Weiming Shi <bestswngs@gmail.com>
commit a31e0ad444698d8aa7534a0f89fda543730f97a5 upstream.
Commit b917507e5ad9 ("vsock/virtio: stop workers during the .remove()")
made the RX worker jump to its common exit when rx_run is clear. That
exit still refills the RX queue when the buffer count is low, so work
queued across virtio_vsock_vqs_del() can add buffers after the virtqueues
have been deleted.
BUG: KASAN: slab-use-after-free in virtqueue_add_sgs
Read of size 4 by task kworker/0:1
Workqueue: virtio_vsock virtio_transport_rx_work
Call Trace:
virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2796)
virtio_vsock_rx_fill (net/vmw_vsock/virtio_transport.c:332)
virtio_transport_rx_work (net/vmw_vsock/virtio_transport.c:701)
process_one_work (kernel/workqueue.c:3314)
worker_thread (kernel/workqueue.c:3478)
kthread (kernel/kthread.c:436)
ret_from_fork (arch/x86/kernel/process.c:158)
ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
...
Freed by task 141:
kfree (mm/slub.c:6566)
vp_del_vq (drivers/virtio/virtio_pci_common.c:259)
vp_del_vqs (drivers/virtio/virtio_pci_common.c:285)
virtio_vsock_freeze (net/vmw_vsock/virtio_transport.c:912)
virtio_device_freeze (drivers/virtio/virtio.c:658)
virtio_pci_freeze (drivers/virtio/virtio_pci_common.c:601)
pci_pm_freeze (drivers/pci/pci-driver.c:1098)
device_suspend (drivers/base/power/main.c:1968)
Kernel panic - not syncing: KASAN: panic_on_warn set ...
Jump to a no-refill exit when rx_run is clear, leaving the normal exit
to replenish a running queue.
Fixes: b917507e5ad9 ("vsock/virtio: stop workers during the .remove()")
Cc: stable@vger.kernel.org
Reported-by: Xiang Mei <xmei5@asu.edu>
Link: https://lore.kernel.org/r/20260727035804.1860862-1-bestswngs@gmail.com
Suggested-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Weiming Shi <bestswngs@gmail.com>
Reviewed-by: Bobby Eshleman <bobbyeshleman@meta.com>
Link: https://patch.msgid.link/f9c8c1d64cad9d262f305d02ffe164c2f900fadf.1785352330.git.bestswngs@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/vmw_vsock/virtio_transport.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -618,7 +618,7 @@ static void virtio_transport_rx_work(str
mutex_lock(&vsock->rx_lock);
if (!vsock->rx_run)
- goto out;
+ goto out_nofill;
vq = vsock->vqs[VSOCK_VQ_RX];
@@ -668,6 +668,7 @@ static void virtio_transport_rx_work(str
out:
if (vsock->rx_buf_nr < vsock->rx_buf_max_nr / 2)
virtio_vsock_rx_fill(vsock);
+out_nofill:
mutex_unlock(&vsock->rx_lock);
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 156/181] veth: fix skb length accounting after XDP frag adjustment
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (154 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 155/181] vsock/virtio: avoid refilling the RX queue after teardown Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 157/181] vhost: reset the vring metadata cache on vring reconfiguration Greg Kroah-Hartman
` (27 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Mohsin Bashir, Lorenzo Bianconi,
Sun Jian, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sun Jian <sun.jian.kdev@gmail.com>
commit cb6379feaaff11c4e1e79c26c745ffa23182768a upstream.
veth exposes non-linear skb fragments through an xdp_buff. If an XDP
program adjusts the fragment area, veth_xdp_rcv_skb() copies
xdp_frags_size back to skb->data_len but leaves skb->len containing the
old fragment contribution.
After a fragment shrink, this makes skb_headlen() larger than the actual
linear area. In the reproduced UDP receive path, __skb_datagram_iter()
copied 1024 bytes past the actual linear tail to userspace, starting at
struct skb_shared_info. The copied bytes included the affected skb's
nr_frags, xdp_frags_size, and a kernel pointer from
skb_shinfo(skb)->frags[0]. Real packet data was displaced by the same
amount and truncated at the end.
Subtract the old data_len before replacing it and add the new data_len
afterwards, keeping skb->len and skb->data_len synchronized.
Additionally, bpf_xdp_pull_data() can advance data_end while leaving
frags present. The skb is then still non-linear, so the old
__skb_put(skb, off) triggers SKB_LINEAR_ASSERT().
Use skb_set_tail_pointer() and update skb->len explicitly instead,
following bpf_prog_run_generic_xdp(). Unlike __skb_put(),
skb_set_tail_pointer() does not require a linear skb.
A 60000-byte UDP datagram on a veth pair with MTU 64000 was shortened by
1024 bytes from its fragment area. Before the fix, all 10 runs produced
corrupted payloads. After the fix, all 10 runs matched the expected
payload exactly. A forced-tailroom reproducer also exercises
bpf_xdp_pull_data() with frags still present; the old code triggers
SKB_LINEAR_ASSERT(), while this fix passes 10/10 runs.
Fixes: 718a18a0c8a6 ("veth: Rework veth_xdp_rcv_skb in order to accept non-linear skb")
Cc: stable@vger.kernel.org
Reported-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://lore.kernel.org/bpf/80687d9c-9c27-494c-b3f2-efd0230b1895@gmail.com/
Suggested-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sun Jian <sun.jian.kdev@gmail.com>
Link: https://patch.msgid.link/20260804054040.613675-3-sun.jian.kdev@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/veth.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -865,18 +865,24 @@ static struct sk_buff *veth_xdp_rcv_skb(
skb_reset_mac_header(skb);
- /* check if bpf_xdp_adjust_tail was used */
- off = xdp->data_end - orig_data_end;
- if (off != 0)
- __skb_put(skb, off); /* positive on grow, negative on shrink */
-
/* XDP frag metadata (e.g. nr_frags) are updated in eBPF helpers
- * (e.g. bpf_xdp_adjust_tail), we need to update data_len here.
+ * (e.g. bpf_xdp_adjust_tail). Remove the old fragment contribution
+ * from skb->len before updating data_len, then add the new one back.
*/
- if (xdp_buff_has_frags(xdp))
+ skb->len -= skb->data_len;
+ if (xdp_buff_has_frags(xdp)) {
skb->data_len = skb_shinfo(skb)->xdp_frags_size;
- else
+ skb->len += skb->data_len;
+ } else {
skb->data_len = 0;
+ }
+
+ /* Synchronize the skb tail with XDP's updated linear area. */
+ off = xdp->data_end - orig_data_end;
+ if (off != 0) {
+ skb_set_tail_pointer(skb, xdp->data_end - xdp->data);
+ skb->len += off; /* positive on grow, negative on shrink */
+ }
skb->protocol = eth_type_trans(skb, rq->dev);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 157/181] vhost: reset the vring metadata cache on vring reconfiguration
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (155 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 156/181] veth: fix skb length accounting after XDP frag adjustment Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 158/181] tls: dont leave a full plaintext sk_msg ring unpushed Greg Kroah-Hartman
` (26 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jun Yang, Michael S. Tsirkin
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jun Yang <junvyyang@tencent.com>
commit de845981da67a6b049080c87e605130b0c30adc5 upstream.
vq->meta_iotlb[] caches the vhost_iotlb_map that backs each vring
metadata region, and iotlb_access_ok() returns early on a cache hit,
taking the hit as proof that the region has already been validated:
if (vhost_vq_meta_fetch(vq, addr, len, type))
return true;
The cache is reset on VHOST_IOTLB_UPDATE and VHOST_IOTLB_INVALIDATE, on
device IOTLB (re)initialisation and on vq reset, but not when
VHOST_SET_VRING_ADDR replaces vq->desc, vq->avail and vq->used, nor when
VHOST_SET_VRING_NUM changes the region sizes.
With a device IOTLB attached both ioctls are accepted while the vq is
live, and neither validates the addresses at ioctl time: vq_access_ok()
and vq_log_used_access_ok() return true early because the addresses are
GIOVAs, deferring validation to prefetch time. Once the cache has been
populated that deferred validation no longer runs -- vq_meta_prefetch()
hits the stale entry and returns true -- and vhost_vq_meta_fetch() keeps
translating through the old mapping as
map->addr + addr - map->start
for an address the mapping no longer covers. vhost_copy_to_user() and
vhost_copy_from_user() consume the result with __copy_to_user() and
__copy_from_user(), which do not check it either, so a subsequent used
ring update or descriptor fetch accesses memory outside the region the
IOTLB actually maps.
Reset the metadata cache whenever the vring is reconfigured, so the new
addresses are pushed back through iotlb_access_ok()'s slow path.
Fixes: f88949138058 ("vhost: introduce O(1) vq metadata cache")
Cc: stable@vger.kernel.org
Assisted-by: tencentos-corvus-ai:kimi-k3
Signed-off-by: Jun Yang <junvyyang@tencent.com>
Message-ID: <20260803014823.68623-1-juny24602@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/vhost/vhost.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2125,6 +2125,14 @@ static long vhost_vring_set_num_addr(str
BUG();
}
+ /*
+ * The metadata cache holds the IOTLB mapping that backed the previous
+ * desc/avail/used addresses and vring size, both of which are being
+ * replaced here. iotlb_access_ok() takes a cache hit as proof that the
+ * region was validated, so the stale entries have to go.
+ */
+ __vhost_vq_meta_reset(vq);
+
mutex_unlock(&vq->mutex);
return r;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 158/181] tls: dont leave a full plaintext sk_msg ring unpushed
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (156 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 157/181] vhost: reset the vring metadata cache on vring reconfiguration Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 159/181] tipc: read le->link under the node lock in tipc_node_link_down() Greg Kroah-Hartman
` (25 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sabrina Dubroca, chanyoung,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: chanyoung <ppoo1220@gmail.com>
commit 7bca91d63341274e857f4aeaad54d229405e93dc upstream.
When the copy path in tls_sw_sendmsg_locked() adds the fragment that fills
the plaintext sk_msg ring, it does not set full_record, so the record is
left full and unpushed. A later splice() then adds to an already full
ring: sk_msg_page_add() has no fullness check of its own, so sg.end wraps
onto sg.start and the ring appears empty. Fragments added after that
overwrite live entries, and sg.size no longer matches what is reachable
between sg.start and sg.end, so pushing the record runs the scatterwalk off
the end of the scatterlist.
An unprivileged user can trigger this on a loopback TCP socket with the
"tls" ULP attached:
BUG: kernel NULL pointer dereference, address: 0000000000000008
RIP: 0010:memcpy_from_scatterwalk+0x32/0xc0
Call Trace:
skcipher_walk_next+0x1d1/0x2c0
gcm_encrypt_aesni_avx+0x1e9/0x220
bpf_exec_tx_verdict+0x3bb/0x860
tls_sw_sendmsg+0xa1a/0xca0
__sys_sendto+0x1da/0x1f0
Set full_record in the copy path when the ring becomes full, and push a
record that is already full on entry to the sendmsg loop.
Suggested-by: Sabrina Dubroca <sd@queasysnail.net>
Fixes: fe1e81d4f73b ("tls/sw: Support MSG_SPLICE_PAGES")
Cc: stable@vger.kernel.org
Signed-off-by: chanyoung <ppoo1220@gmail.com>
Link: https://patch.msgid.link/20260804052837.49015-2-ppoo1220@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/tls/tls_sw.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1116,6 +1116,14 @@ static int tls_sw_sendmsg_locked(struct
if (!sk_stream_memory_free(sk))
goto wait_for_sndbuf;
+ /* open record may be full if we couldn't push it in the last sendmsg call */
+ if (sk_msg_full(msg_pl)) {
+ full_record = true;
+ sk_msg_trim(sk, msg_en,
+ msg_pl->sg.size + prot->overhead_size);
+ goto copied;
+ }
+
alloc_encrypted:
ret = tls_alloc_encrypted_msg(sk, required_size);
if (ret) {
@@ -1216,6 +1224,12 @@ fallback_to_reg_send:
msg_pl, try_to_copy);
if (ret < 0)
goto trim_sgl;
+
+ if (sk_msg_full(msg_pl)) {
+ full_record = true;
+ sk_msg_trim(sk, msg_en,
+ msg_pl->sg.size + prot->overhead_size);
+ }
}
/* Open records defined only if successfully copied, otherwise
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 159/181] tipc: read le->link under the node lock in tipc_node_link_down()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (157 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 158/181] tls: dont leave a full plaintext sk_msg ring unpushed Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 160/181] smb: client: Fix use-after-free in cifs_try_adding_channels() Greg Kroah-Hartman
` (24 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, TencentOS Corvus AI,
Jun Yang, Tung Nguyen, Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jun Yang <junvyyang@tencent.com>
commit cba9ccb47e9fa4cc77692fb896cc5ab57a667882 upstream.
tipc_node_link_down() caches the link pointer before taking n->lock:
struct tipc_link *l = le->link; /* unlocked */
if (!l)
return;
tipc_node_write_lock(n);
if (!tipc_link_is_establishing(l)) { /* deref l */
...
tipc_link_reset(l); /* write into l */
if (delete) {
kfree(l);
le->link = NULL;
The delete=true caller frees that very object under n->lock, so the lock
does not protect the cached pointer against it:
- CPU A, delete=false: tipc_rcv() on TIPC_LINK_DOWN_EVT, or the link
supervision timer via tipc_node_timeout(), reads l unlocked and then
dereferences it under n->lock;
- CPU B, delete=true: netlink TIPC_NL_BEARER_DISABLE -> bearer_disable()
-> tipc_node_delete_links() -> tipc_node_link_down(n, bearer_id, true)
-> kfree(l).
The link is freed with plain kfree(), not kfree_rcu(), and for UDP bearers
disable_media() only schedules the asynchronous cleanup_bearer() work, so
its synchronize_net() runs after the links are already gone. An in-flight
CPU A that has read l therefore dereferences freed memory once B frees it:
a use-after-free read in tipc_link_is_establishing(), and a use-after-free
write via tipc_link_reset() on the establishing branch.
The following trace was captured on 7.2.0-rc5-00284-gaf39eb111ce6:
BUG: KASAN: slab-use-after-free in tipc_link_is_establishing (net/tipc/link.c:285)
Read of size 4 at addr ffff88802e2aa068 by task swapper/2/0
tipc_link_is_establishing (net/tipc/link.c:285)
tipc_node_link_down (net/tipc/node.c:1076)
tipc_node_timeout (net/tipc/node.c:843)
Allocated by task 9549:
tipc_link_create (net/tipc/link.c:490)
tipc_node_check_dest (net/tipc/node.c:1279)
tipc_disc_rcv (net/tipc/discover.c:252)
tipc_udp_recv (net/tipc/udp_media.c:389)
Freed by task 9549:
tipc_node_link_down (net/tipc/node.c:1084)
tipc_node_delete_links (net/tipc/node.c:1320)
bearer_disable (net/tipc/bearer.c:414)
__tipc_nl_bearer_disable (net/tipc/bearer.c:992)
Move the le->link read inside tipc_node_write_lock(), so it is serialised
against the kfree() in the delete path. A racing teardown now either has
not run yet, and we see a valid link, or has already run, and we see NULL.
Fixes: 73f646cec354 ("tipc: delay ESTABLISH state event when link is established")
Cc: stable@kernel.org
Reported-by: TencentOS Corvus AI <corvus@tencent.com>
Assisted-by: tencentos-corvus-ai:kimi-k3
Signed-off-by: Jun Yang <junvyyang@tencent.com>
Reviewed-by: Tung Nguyen <tung.quang.nguyen@est.tech>
Link: https://patch.msgid.link/20260810102147.48191-1-juny24602@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/tipc/node.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1061,18 +1061,23 @@ static void __tipc_node_link_down(struct
static void tipc_node_link_down(struct tipc_node *n, int bearer_id, bool delete)
{
- struct tipc_link_entry *le = &n->links[bearer_id];
struct tipc_media_addr *maddr = NULL;
- struct tipc_link *l = le->link;
int old_bearer_id = bearer_id;
+ struct tipc_link_entry *le;
struct sk_buff_head xmitq;
-
- if (!l)
- return;
+ struct tipc_link *l;
__skb_queue_head_init(&xmitq);
+ /* Synchronize the link lookup with bearer teardown. */
tipc_node_write_lock(n);
+ le = &n->links[bearer_id];
+ l = le->link;
+ if (!l) {
+ tipc_node_write_unlock_fast(n);
+ return;
+ }
+
if (!tipc_link_is_establishing(l)) {
__tipc_node_link_down(n, &bearer_id, &xmitq, &maddr);
} else {
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 160/181] smb: client: Fix use-after-free in cifs_try_adding_channels()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (158 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 159/181] tipc: read le->link under the node lock in tipc_node_link_down() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 161/181] KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Greg Kroah-Hartman
` (23 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Shuangpeng Bai, Steve French
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
commit 4986410316b1ae0e63c6ce418e4eb196723626e7 upstream.
cifs_try_adding_channels() takes a temporary reference to an interface
before dropping iface_lock. If cifs_ses_add_channel() fails, it drops
that reference and then increments iface->weight_fulfilled.
A concurrent interface list refresh can remove the list reference while
channel creation is in progress. In that case, the failure-path
kref_put() releases the last reference and frees iface. Updating
weight_fulfilled afterward then accesses freed memory.
Increment weight_fulfilled before dropping the temporary reference,
keeping iface alive for the final access.
Fixes: 6aac002bcfd5 ("cifs: failure to add channel on iface should bump up weight")
Cc: stable@vger.kernel.org
Signed-off-by: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/smb/client/sess.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/smb/client/sess.c
+++ b/fs/smb/client/sess.c
@@ -259,9 +259,9 @@ int cifs_try_adding_channels(struct cifs
cifs_dbg(VFS, "failed to open extra channel on iface:%pIS rc=%d\n",
&iface->sockaddr,
rc);
- kref_put(&iface->refcount, release_iface);
/* failure to add chan should increase weight */
iface->weight_fulfilled++;
+ kref_put(&iface->refcount, release_iface);
continue;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 161/181] KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (159 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 160/181] smb: client: Fix use-after-free in cifs_try_adding_channels() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 162/181] eventfs: Fix use-after-free in eventfs_remove_rec() Greg Kroah-Hartman
` (22 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Hyunwoo Kim, Sean Christopherson,
Paolo Bonzini
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sean Christopherson <seanjc@google.com>
commit 5ec42d57655c690234c14aece6dd3f209778c1d8 upstream.
Explicitly clear role.invalid when deriving a child shadow page's role from
its parent to harden against bugs elsewhere in KVM, as violating KVM's
invariant that invalid pages are NOT on the list of active MMU pages leads
to use-after-free due to __kvm_mmu_prepare_zap_page() using list_add()
instead of list_move() when processing an invalid shadow page, i.e. makes a
bad situation far worse.
Yell loudly if the parent is invalid, as it means KVM has missed a validity
check, i.e. KVM is attempting to map memory using an invalid/obsolete root,
but continue on as the child is otherwise still a valid shadow page.
==================================================================
BUG: KASAN: slab-use-after-free in __kvm_mmu_get_shadow_page+0x1817/0x1860 [kvm]
Write of size 8 at addr ff11000153dd1368 by task repro/853
CPU: 1 UID: 1000 PID: 853 Comm: repro Not tainted 7.2.0-rc2-3aec122bdcaf-next-vm #5 PREEMPT
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
Call Trace:
<TASK>
dump_stack_lvl+0x4b/0x70
print_report+0x153/0x49c
kasan_report+0xbc/0xf0
__kvm_mmu_get_shadow_page+0x1817/0x1860 [kvm]
mmu_alloc_root+0x141/0x320 [kvm]
kvm_mmu_load+0x612/0x20f0 [kvm]
kvm_arch_vcpu_ioctl_run+0x3dd5/0x6150 [kvm]
kvm_vcpu_ioctl+0x5e4/0x10d0 [kvm]
__x64_sys_ioctl+0x131/0x1b0
do_syscall_64+0x67/0x5f0
entry_SYSCALL_64_after_hwframe+0x4b/0x53
</TASK>
Allocated by task 853:
kasan_save_stack+0x20/0x40
kasan_save_track+0x14/0x30
__kasan_slab_alloc+0x5f/0x70
kmem_cache_alloc_noprof+0xfe/0x2e0
__kvm_mmu_topup_memory_cache+0x135/0x530 [kvm]
paging64_page_fault+0x318/0x1e30 [kvm]
kvm_mmu_do_page_fault+0x21d/0x630 [kvm]
kvm_mmu_page_fault+0x18c/0x17b0 [kvm]
kvm_arch_vcpu_ioctl_run+0x1f35/0x6150 [kvm]
kvm_vcpu_ioctl+0x5e4/0x10d0 [kvm]
__x64_sys_ioctl+0x131/0x1b0
do_syscall_64+0x67/0x5f0
entry_SYSCALL_64_after_hwframe+0x4b/0x53
Freed by task 853:
kasan_save_stack+0x20/0x40
kasan_save_track+0x14/0x30
kasan_save_free_info+0x3b/0x60
__kasan_slab_free+0x43/0x70
kmem_cache_free+0xe2/0x400
kvm_mmu_commit_zap_page.part.0+0x1e2/0x310 [kvm]
kvm_mmu_free_roots+0x283/0x560 [kvm]
kvm_arch_vcpu_ioctl_run+0x33c8/0x6150 [kvm]
kvm_vcpu_ioctl+0x5e4/0x10d0 [kvm]
__x64_sys_ioctl+0x131/0x1b0
do_syscall_64+0x67/0x5f0
entry_SYSCALL_64_after_hwframe+0x4b/0x53
Reported-by: Hyunwoo Kim <imv4bel@gmail.com>
Fixes: a770f6f28b1a ("KVM: MMU: Inherit a shadow page's guest level count from vcpu setup")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/mmu/mmu.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2291,6 +2291,9 @@ static union kvm_mmu_page_role kvm_mmu_c
role.direct = direct;
role.passthrough = 0;
+ WARN_ON_ONCE(role.invalid);
+ role.invalid = 0;
+
/*
* If the guest has 4-byte PTEs then that means it's using 32-bit,
* 2-level, non-PAE paging. KVM shadows such guests with PAE paging
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 162/181] eventfs: Fix use-after-free in eventfs_remove_rec()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (160 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 161/181] KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 163/181] eventfs: Use children field for rcu head and add memory barriers Greg Kroah-Hartman
` (21 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Shuangpeng Bai,
Masami Hiramatsu (Google), Steven Rostedt
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
commit fd73b691702170d37d66f4b0278530cea8ed419a upstream.
eventfs_remove_rec() recursively removes the child at the current loop
position. After the recursive call returns, list_for_each_entry() advances
by reading list.next from the removed child.
If free_ei() drops the final reference, release_ei() reuses the list/rcu
union to queue an SRCU callback. The child may be freed before that read.
The eventfs_mutex serializes list updates, but it does not keep the removed
child alive or prevent the SRCU callback from running.
Use list_for_each_entry_safe() to save the next sibling before recursively
removing the current child.
Cc: stable@vger.kernel.org
Fixes: 43aa6f97c2d0 ("eventfs: Get rid of dentry pointers without refcounts")
Link: https://patch.msgid.link/20260806022719.375354-1-shuangpeng.kernel@gmail.com
Signed-off-by: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/tracefs/event_inode.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/tracefs/event_inode.c
+++ b/fs/tracefs/event_inode.c
@@ -849,7 +849,7 @@ struct eventfs_inode *eventfs_create_eve
*/
static void eventfs_remove_rec(struct eventfs_inode *ei, int level)
{
- struct eventfs_inode *ei_child;
+ struct eventfs_inode *ei_child, *tmp;
/*
* Check recursion depth. It should never be greater than 3:
@@ -862,7 +862,7 @@ static void eventfs_remove_rec(struct ev
return;
/* search for nested folders or files */
- list_for_each_entry(ei_child, &ei->children, list)
+ list_for_each_entry_safe(ei_child, tmp, &ei->children, list)
eventfs_remove_rec(ei_child, level + 1);
list_del_rcu(&ei->list);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 163/181] eventfs: Use children field for rcu head and add memory barriers
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (161 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 162/181] eventfs: Fix use-after-free in eventfs_remove_rec() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 164/181] Revert "thermal/drivers/hwmon: Cleanup coding style a bit" Greg Kroah-Hartman
` (20 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sashiko, Masami Hiramatsu (Google),
Steven Rostedt
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Steven Rostedt <rostedt@goodmis.org>
commit f0ece16ffca7384787b692431961ce202907acf5 upstream.
When an eventfs inode is freed, it sets ei->is_freed and then uses its
ei->list to add it to the srcu link list as the list field is a union with
the rcu list head. As the ei->list is used to iterate over an SRCU
protected list without taking the eventfs_mutex, there's nothing stopping
the iteration over that list to see the ei->rcu instead of the ei->list
and it will read a corrupt target.
To fix this, change the union of the rcu list head with the children list.
On freeing the eventfs inode, set the is_free and execute a smp_wmb()
before adding the eventfs inode to the SRCU list.
On iteration of the ei->children list, at the start, execute a smp_rmb()
and then read the is_freed of the ei to see if the children list is still
valid. If is_freed is set, then the ei_child read is not valid and the
loop should exit immediately.
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260808094215.4252430d@robin
Fixes: 704f960dbee2f ("eventfs: Read ei->entries before ei->children in eventfs_iterate()")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260806022719.375354-1-shuangpeng.kernel%40gmail.com
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/tracefs/event_inode.c | 24 ++++++++++++++++++++++++
fs/tracefs/internal.h | 4 ++--
2 files changed, 26 insertions(+), 2 deletions(-)
--- a/fs/tracefs/event_inode.c
+++ b/fs/tracefs/event_inode.c
@@ -124,7 +124,17 @@ static inline void put_ei(struct eventfs
static inline void free_ei(struct eventfs_inode *ei)
{
if (ei) {
+ /* The ei should have no children if it is being freed. */
+ WARN_ON_ONCE(!list_empty(&ei->children));
ei->is_freed = 1;
+ /*
+ * The SRCU iteration has a smp_rmb() to make sure it
+ * sees a child (that may have already been freed)
+ * before it reads is_free. If is_free is set, it must
+ * not use the child it acquired from ei->children, as
+ * the list may be used for SRCU.
+ */
+ smp_wmb();
put_ei(ei);
}
}
@@ -647,6 +657,20 @@ static int eventfs_iterate(struct file *
list_for_each_entry_srcu(ei_child, &ei->children, list,
srcu_read_lock_held(&eventfs_srcu)) {
+ /*
+ * If the ei is being freed, then the ei->children may be
+ * being used as the rcu list, which means the next element
+ * may be garbage. The ei->is_free is set before switching
+ * the ei->children over to ei->rcu. The read memory barrier
+ * here makes sure the ei_child is read before is_free is
+ * updated.
+ *
+ * Matches the smp_wmb() in free_ei()
+ */
+ smp_rmb();
+ if (ei->is_freed)
+ return -EINVAL;
+
if (c > 0) {
c--;
continue;
--- a/fs/tracefs/internal.h
+++ b/fs/tracefs/internal.h
@@ -46,11 +46,11 @@ struct eventfs_attr {
* @ino: The saved inode number
*/
struct eventfs_inode {
+ struct list_head list;
union {
- struct list_head list;
+ struct list_head children;
struct rcu_head rcu;
};
- struct list_head children;
const struct eventfs_entry *entries;
const char *name;
struct eventfs_attr *entry_attrs;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 164/181] Revert "thermal/drivers/hwmon: Cleanup coding style a bit"
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (162 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 163/181] eventfs: Use children field for rcu head and add memory barriers Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 165/181] ptp: ocp: Fix board ID over-read Greg Kroah-Hartman
` (19 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Rafael J. Wysocki, Lukasz Luba
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
commit ff8da20b6f47c48d46e47f93f7a59e2d56ee9107 upstream.
Revert commit 030a48b0f6ce ("thermal/drivers/hwmon: Cleanup coding style
a bit") that introduced a use-after-free into the error path of
thermal_add_hwmon_sysfs() by removing a valid check from it.
Link: https://lore.kernel.org/linux-hwmon/20260803183915.4ED7D1F000E9@smtp.kernel.org/
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/5123895.31r3eYUQgx@rafael.j.wysocki
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/thermal/thermal_hwmon.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/thermal/thermal_hwmon.c
+++ b/drivers/thermal/thermal_hwmon.c
@@ -215,7 +215,8 @@ int thermal_add_hwmon_sysfs(struct therm
if (new_hwmon_device)
hwmon_device_unregister(hwmon->device);
free_mem:
- kfree(hwmon);
+ if (new_hwmon_device)
+ kfree(hwmon);
return result;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 165/181] ptp: ocp: Fix board ID over-read
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (163 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 164/181] Revert "thermal/drivers/hwmon: Cleanup coding style a bit" Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 166/181] ring-buffer: Use current_context for safe per-CPU buffer swap Greg Kroah-Hartman
` (18 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Ahmad Byagowi, Vadim Fedorenko,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ahmad Byagowi <ahmadexp@gmail.com>
commit 6b69f2ef10cdb018c0b127a7cab88e590bbddba4 upstream.
The EEPROM board ID is a fixed 13-byte field and is not guaranteed to
contain a NUL terminator. Passing it directly to
devlink_info_version_fixed_put() treats it as a C string and may read
beyond the field.
Format at most OCP_BOARD_ID_LEN bytes into the existing local buffer
before reporting the ID. Use a precision limit because the snprintf()
output size alone does not bound the source string scan.
Fixes: 0cfcdd1ebcfe ("ptp: ocp: add nvmem interface for accessing eeprom")
Cc: stable@vger.kernel.org
Signed-off-by: Ahmad Byagowi <ahmadexp@gmail.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20260804210751.48248-1-ahmadexp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/ptp/ptp_ocp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -1914,9 +1914,11 @@ ptp_ocp_devlink_info_get(struct devlink
if (err)
return err;
+ snprintf(buf, sizeof(buf), "%.*s", OCP_BOARD_ID_LEN,
+ (const char *)bp->board_id);
err = devlink_info_version_fixed_put(req,
DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,
- bp->board_id);
+ buf);
if (err)
return err;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 166/181] ring-buffer: Use current_context for safe per-CPU buffer swap
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (164 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 165/181] ptp: ocp: Fix board ID over-read Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 167/181] ipv6: fix Route Information option length validation Greg Kroah-Hartman
` (17 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Tengda Wu, Steven Rostedt
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tengda Wu <wutengda@huaweicloud.com>
commit f27bdc43077e4fcb5557dfc315ee8d91e741f483 upstream.
The ring_buffer_swap_cpu() function currently checks the per-CPU
committing counter to determine if a buffer is actively being written to
before performing the swap. However, there exists a race window where
this check can be bypassed:
ring_buffer_lock_reserve
cpu_buffer = buffer->buffers[cpu]; // cpu_buffer_a
rb_reserve_next_event
rb_start_commit // inc committing
if (unlikely(READ_ONCE(cpu_buffer->buffer) != buffer)) {...}
__rb_reserve_next
rb_move_tail
rb_end_commit(cpu_buffer); // dec committing => 0
/* interrupt hits here, successfully swaps! */
local_inc(&cpu_buffer->committing);
ring_buffer_unlock_commit
cpu_buffer = buffer->buffers[cpu]; // cpu_buffer_b
rb_commit
rb_end_commit
RB_WARN_ON(cpu_buffer, !local_read(&cpu_buffer->committing))
// triggers warning
The committing counter can temporarily drop to 0 during a single write
operation (within rb_move_tail), creating a window where swap can
succeed even though the write is still in progress. This leads to
inconsistent buffer state and triggers the RB_WARN_ON in rb_commit().
Replace the committing counter check with current_context checks, which
are set at the entry of ring_buffer_lock_reserve() and remain valid
throughout the entire write operation, providing a reliable indicator of
buffer busy state during swap.
Cc: stable@vger.kernel.org
Fixes: 4239c38fe0b3 ("ring-buffer: Process commits whenever moving to a new page.")
Link: https://patch.msgid.link/20260803005640.2445666-2-wutengda@huaweicloud.com
Signed-off-by: Tengda Wu <wutengda@huaweicloud.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/trace/ring_buffer.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -6253,7 +6253,7 @@ int ring_buffer_swap_cpu(struct trace_bu
{
struct ring_buffer_per_cpu *cpu_buffer_a;
struct ring_buffer_per_cpu *cpu_buffer_b;
- int ret = -EINVAL;
+ int ret = -EBUSY;
if (!cpumask_test_cpu(cpu, buffer_a->cpumask) ||
!cpumask_test_cpu(cpu, buffer_b->cpumask))
@@ -6298,10 +6298,10 @@ int ring_buffer_swap_cpu(struct trace_bu
atomic_inc(&cpu_buffer_a->record_disabled);
atomic_inc(&cpu_buffer_b->record_disabled);
- ret = -EBUSY;
- if (local_read(&cpu_buffer_a->committing))
+ /* Do not swap if either buffer is in the process of writing */
+ if (cpu_buffer_a->current_context)
goto out_dec;
- if (local_read(&cpu_buffer_b->committing))
+ if (cpu_buffer_b->current_context)
goto out_dec;
/*
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 167/181] ipv6: fix Route Information option length validation
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (165 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 166/181] ring-buffer: Use current_context for safe per-CPU buffer swap Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 168/181] ip6_tunnel: clear skb2->cb[] in ip6ip6_err() Greg Kroah-Hartman
` (16 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Yuejie Shi, Ido Schimmel,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yuejie Shi <syjcnss@gmail.com>
commit d1ad8fb2ac6a1afb71dc22d9ae8efb4dda96c824 upstream.
rt6_route_rcv() validates the Route Information option (RFC 4191) length
against the prefix length, but both checks are off by one.
rinfo->length is the ND option length in units of 8 octets and it
*includes* the 8-byte option header, so an option carrying N bytes of
prefix has length == 1 + N/8. RFC 4191 section 2.3 requires length 3
when Prefix Length is greater than 64, and 2 or 3 when it is greater
than 0. The code accepts length >= 2 and length >= 1 respectively.
ipv6_addr_prefix() then copies prefix_len/8 bytes out of rinfo->prefix,
so a Router Advertisement with (prefix_len=128, length=2) or
(prefix_len=64, length=1) makes the kernel read up to 8 bytes past the
end of the option. Those bytes end up in the prefix of the route that
gets installed, so they are visible to userspace:
# RA with a Route Information option (prefix_len=128, length=2)
# followed by a source link-layer address option, 01 01 de ad be ef ca fe
$ ip -6 route show
2001:db8:dead:beef:101:dead:beef:cafe via fe80::1234 dev veth0 proto ra
^^^^^^^^^^^^^^^^^^ the next option, read out of bounds
When the Route Information option is the last one in the packet, those
eight bytes come from the skb tail room instead.
Reject the option lengths RFC 4191 does not allow.
Fixes: 70ceb4f53929 ("[IPV6]: ROUTE: Add experimental support for Route Information Option in RA (RFC4191).")
Cc: stable@vger.kernel.org
Signed-off-by: Yuejie Shi <syjcnss@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260730035310.74584-1-syjcnss@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/route.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -988,13 +988,13 @@ int rt6_route_rcv(struct net_device *dev
} else if (rinfo->prefix_len > 128) {
return -EINVAL;
} else if (rinfo->prefix_len > 64) {
- if (rinfo->length < 2) {
+ /* RFC 4191: Length MUST be 3 when Prefix Length > 64 */
+ if (rinfo->length < 3)
return -EINVAL;
- }
} else if (rinfo->prefix_len > 0) {
- if (rinfo->length < 1) {
+ /* RFC 4191: Length MUST be 2 or 3 when Prefix Length > 0 */
+ if (rinfo->length < 2)
return -EINVAL;
- }
}
pref = rinfo->route_pref;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 168/181] ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (166 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 167/181] ipv6: fix Route Information option length validation Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 169/181] fscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy() Greg Kroah-Hartman
` (15 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zhiling Zou, Ido Schimmel,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhiling Zou <zhilinz@nebusec.ai>
commit f803c086399da277b5d0ff36a107d0f162751800 upstream.
ip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the
quoted inner IPv6 packet, and then passes the clone to icmpv6_send().
The clone still carries the outer packet's inet6_skb_parm in skb->cb.
If the outer packet had a Home Address Option, IP6CB(skb2)->dsthao
remains non-zero after skb_pull(). icmpv6_send() later calls
mip6_addr_swap(), which uses that stale dsthao offset against the quoted
inner packet. A malformed inner destination-options header can then make
the HAO lookup and address swap run past the end of the quoted packet
and corrupt skb_shared_info.
Clear skb2->cb[] before pulling the quoted inner IPv6 packet so the
reply path does not reuse metadata left by the outer IPv6 stack.
Fixes: e490d1d85cf5 ("[IPV6] IP6TUNNEL: Split out generic routine in ip6ip6_err().")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/fe1a5e765fbca88d69391887f0ed26a19e3e4d39.1785736562.git.zhilinz@nebusec.ai
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/ip6_tunnel.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -677,6 +677,9 @@ ip6ip6_err(struct sk_buff *skb, struct i
if (!skb2)
return 0;
+ /* Remove debris left by outer IPv6 stack. */
+ memset(IP6CB(skb2), 0, sizeof(*IP6CB(skb2)));
+
skb_dst_drop(skb2);
skb_pull(skb2, offset);
skb_reset_network_header(skb2);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 169/181] fscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (167 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 168/181] ip6_tunnel: clear skb2->cb[] in ip6ip6_err() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 170/181] sched/psi: Shut down rtpoll_timer in psi_cgroup_free() Greg Kroah-Hartman
` (14 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Zhan Xusheng, Eric Biggers
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhan Xusheng <zhanxusheng@xiaomi.com>
commit cf6c993c0feca7984797e634deba3c80342e199a upstream.
fscrypt_ioctl_set_policy() calls inode_owner_or_capable() with
&nop_mnt_idmap before allowing an encryption policy to be set, instead
of the idmap of the mount the ioctl was issued on.
fscrypt is used by filesystems that support idmapped mounts (e.g. ext4,
f2fs), so on such a mount this compares the caller's fsuid against the
unmapped on-disk owner rather than the mapped owner: the actual owner
can be wrongly denied with -EACCES and an unrelated caller wrongly
allowed. Use file_mnt_idmap(filp) instead.
Fixes: 14f3db5542e6 ("ext4: support idmapped mounts")
Cc: stable@vger.kernel.org
Signed-off-by: Zhan Xusheng <zhanxusheng@xiaomi.com>
Link: https://patch.msgid.link/20260725080004.929328-1-zhanxusheng1024@gmail.com
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/crypto/policy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/crypto/policy.c
+++ b/fs/crypto/policy.c
@@ -532,7 +532,7 @@ int fscrypt_ioctl_set_policy(struct file
return -EFAULT;
policy.version = version;
- if (!inode_owner_or_capable(&nop_mnt_idmap, inode))
+ if (!inode_owner_or_capable(file_mnt_idmap(filp), inode))
return -EACCES;
ret = mnt_want_write_file(filp);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 170/181] sched/psi: Shut down rtpoll_timer in psi_cgroup_free()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (168 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 169/181] fscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 171/181] ima: Instantiate file_truncate and path_truncate hooks Greg Kroah-Hartman
` (13 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sashiko AI, Tejun Heo,
Johannes Weiner, Matt Fleming, Suren Baghdasaryan
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tejun Heo <tj@kernel.org>
commit 5457025fa8ca3c0d2732109513de839e3e797190 upstream.
psi_schedule_rtpoll_work() is called locklessly from the scheduler hotpath
and can race psi_trigger_destroy() taking down the last rtpoll trigger under
rtpoll_trigger_lock:
psi_schedule_rtpoll_work() psi_trigger_destroy()
rcu_read_lock();
task = rcu_dereference(rtpoll_task);
rcu_assign_pointer(rtpoll_task, NULL);
timer_delete(&rtpoll_timer);
mod_timer(&rtpoll_timer, ...);
rcu_read_unlock();
synchronize_rcu();
kthread_stop(task_to_destroy);
The group can then be freed with the re-armed timer still pending, and
poll_timer_fn() runs on freed memory.
461daba06bdc ("psi: eliminate kthread_worker from psi trigger scheduling
mechanism") deleted the timer synchronously after the synchronize_rcu(),
which prevented this but raced trigger creation instead: the deletion could
cancel the timer that a new trigger set armed during the grace period and,
as creation also reinitialized the timer at the time, corrupt it.
8f91efd870ea ("psi: Fix race between psi_trigger_create/destroy") moved the
initialization into group_init() and the deletion into the locked section,
trading the creation races for the window above.
Neither placement in the destruction path works. A pending timer firing
while the group is alive is harmless though. poll_timer_fn() just wakes the
rtpoll waitqueue and doesn't re-arm itself. Bind the timer to the group's
lifetime instead and shut it down in psi_cgroup_free(). Nothing can arm it
by then. timer_shutdown_sync() because the timer is never armed again.
Fixes: 8f91efd870ea ("psi: Fix race between psi_trigger_create/destroy")
Cc: stable@vger.kernel.org # v5.10+
Reported-by: Sashiko AI <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/all/20260711000434.36C4A1F000E9@smtp.kernel.org/
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Matt Fleming <mfleming@cloudflare.com>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/sched/psi.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -1130,6 +1130,12 @@ void psi_cgroup_free(struct cgroup *cgro
return;
cancel_delayed_work_sync(&cgroup->psi->avgs_work);
+ /*
+ * A psi_schedule_rtpoll_work() call racing the last trigger's
+ * destruction may have re-armed the timer after psi_trigger_destroy()
+ * deleted it. Spurious firing while the group is alive is harmless.
+ */
+ timer_shutdown_sync(&cgroup->psi->rtpoll_timer);
free_percpu(cgroup->psi->pcpu);
/* All triggers must be removed by now */
WARN_ONCE(cgroup->psi->rtpoll_states, "psi: trigger leak\n");
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 171/181] ima: Instantiate file_truncate and path_truncate hooks
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (169 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 170/181] sched/psi: Shut down rtpoll_timer in psi_cgroup_free() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 172/181] fsverity: Fix bpf_get_fsverity_digest() dynptr assumptions Greg Kroah-Hartman
` (12 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Frederick Lawler, Mimi Zohar
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mimi Zohar <zohar@linux.ibm.com>
commit b80bed5c871a80151351342c065579405ce77145 upstream.
Instantiate the file_truncate and path_truncate LSM hooks to reset the
action cache flags (IMA_DONE_MASK) as soon as truncation is requested,
so the file, based on policy, is re-collected, re-measured, re-audited,
and re-appraised on next access.
Tested-by: Frederick Lawler <fred@cloudflare.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
security/integrity/ima/ima_main.c | 39 ++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -587,6 +587,43 @@ static int ima_file_check(struct file *f
MAY_APPEND), FILE_CHECK);
}
+/*
+ * ima_reset_action_flags - invalidate action flags after a content change
+ * @inode: inode of the file whose content is about to be truncated
+ *
+ * Clear IMA_DONE_MASK so the file is re-collected, re-measured,
+ * re-audited, and re-appraised on next access.
+ */
+static void ima_reset_action_flags(struct inode *inode)
+{
+ struct ima_iint_cache *iint;
+
+ if (!ima_policy_flag || !S_ISREG(inode->i_mode))
+ return;
+
+ iint = ima_iint_find(inode);
+ if (!iint)
+ return;
+
+ mutex_lock(&iint->mutex);
+ iint->flags &= ~IMA_DONE_MASK;
+ iint->measured_pcrs = 0;
+ mutex_unlock(&iint->mutex);
+ return;
+}
+
+static int ima_path_truncate(const struct path *path)
+{
+ ima_reset_action_flags(path->dentry->d_inode);
+ return 0;
+}
+
+static int ima_file_truncate(struct file *file)
+{
+ ima_reset_action_flags(file_inode(file));
+ return 0;
+}
+
static int __ima_inode_hash(struct inode *inode, struct file *file, char *buf,
size_t buf_size)
{
@@ -1195,11 +1232,13 @@ static struct security_hook_list ima_hoo
LSM_HOOK_INIT(file_release, ima_file_free),
LSM_HOOK_INIT(mmap_file, ima_file_mmap),
LSM_HOOK_INIT(file_mprotect, ima_file_mprotect),
+ LSM_HOOK_INIT(file_truncate, ima_file_truncate),
LSM_HOOK_INIT(kernel_load_data, ima_load_data),
LSM_HOOK_INIT(kernel_post_load_data, ima_post_load_data),
LSM_HOOK_INIT(kernel_read_file, ima_read_file),
LSM_HOOK_INIT(kernel_post_read_file, ima_post_read_file),
LSM_HOOK_INIT(path_post_mknod, ima_post_path_mknod),
+ LSM_HOOK_INIT(path_truncate, ima_path_truncate),
#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
LSM_HOOK_INIT(key_post_create_or_update, ima_post_key_create_or_update),
#endif
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 172/181] fsverity: Fix bpf_get_fsverity_digest() dynptr assumptions
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (170 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 171/181] ima: Instantiate file_truncate and path_truncate hooks Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 173/181] fsverity: Fix silent truncation in bpf_get_fsverity_digest() Greg Kroah-Hartman
` (11 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eric Biggers,
Kumar Kartikeya Dwivedi, Song Liu
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit 3e8ec7c0387273329374f5c7bd61f5f38af71fe1 upstream.
The BPF verifier and the dynptr abstraction ensure that the memory space
referenced by a dynptr remains valid. They do not, however, provide any
guarantee that the contents of the memory are stable. kfuncs are
expected to remain memory-safe even if concurrent modifications occur.
bpf_get_fsverity_digest() didn't follow that: it could crash if
arg->digest_size was concurrently modified.
Fix that by using the known-good value hash_alg->digest_size instead.
Also widen 'dynptr_sz' and 'out_digest_sz' to u64 to match the return
type of __bpf_dynptr_size(). It doesn't appear that it can actually be
more than INT_MAX currently (since __bpf_dynptr_data_rw() excludes
file-based pointers), but the correct type might as well be used.
Fixes: 67814c00de31 ("bpf, fsverity: Add kfunc bpf_get_fsverity_digest")
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Song Liu <song@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/bpf/20260803181232.14743-2-ebiggers@kernel.org
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/verity/measure.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
--- a/fs/verity/measure.c
+++ b/fs/verity/measure.c
@@ -121,11 +121,11 @@ __bpf_kfunc int bpf_get_fsverity_digest(
{
struct bpf_dynptr_kern *digest_ptr = (struct bpf_dynptr_kern *)digest_p;
const struct inode *inode = file_inode(file);
- u32 dynptr_sz = __bpf_dynptr_size(digest_ptr);
+ u64 dynptr_sz = __bpf_dynptr_size(digest_ptr);
struct fsverity_digest *arg;
const struct fsverity_info *vi;
const struct fsverity_hash_alg *hash_alg;
- int out_digest_sz;
+ u64 out_digest_sz;
if (dynptr_sz < sizeof(struct fsverity_digest))
return -EINVAL;
@@ -149,11 +149,13 @@ __bpf_kfunc int bpf_get_fsverity_digest(
out_digest_sz = dynptr_sz - sizeof(struct fsverity_digest);
/* copy digest */
- memcpy(arg->digest, vi->file_digest, min_t(int, hash_alg->digest_size, out_digest_sz));
+ memcpy(arg->digest, vi->file_digest,
+ min(hash_alg->digest_size, out_digest_sz));
/* fill the extra buffer with zeros */
if (out_digest_sz > hash_alg->digest_size)
- memset(arg->digest + arg->digest_size, 0, out_digest_sz - hash_alg->digest_size);
+ memset(arg->digest + hash_alg->digest_size, 0,
+ out_digest_sz - hash_alg->digest_size);
return 0;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 173/181] fsverity: Fix silent truncation in bpf_get_fsverity_digest()
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (171 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 172/181] fsverity: Fix bpf_get_fsverity_digest() dynptr assumptions Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 174/181] bpf, sockmap: Fix sk_redir use-after-free in send verdict Greg Kroah-Hartman
` (10 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eric Biggers, Song Liu,
Kumar Kartikeya Dwivedi
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit 7c68ed5c5ad4c185ea9654f5d8ee36560277b7dd upstream.
bpf_get_fsverity_digest() silently truncates the digest if the provided
buffer is too small. This is a footgun, and it doesn't match the
semantics of the equivalent UAPI (FS_IOC_MEASURE_VERITY).
Change it to return -EOVERFLOW instead, matching FS_IOC_MEASURE_VERITY.
Fixes: 67814c00de31 ("bpf, fsverity: Add kfunc bpf_get_fsverity_digest")
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/bpf/20260803181232.14743-3-ebiggers@kernel.org
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/verity/measure.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/fs/verity/measure.c
+++ b/fs/verity/measure.c
@@ -143,14 +143,15 @@ __bpf_kfunc int bpf_get_fsverity_digest(
hash_alg = vi->tree_params.hash_alg;
+ out_digest_sz = dynptr_sz - sizeof(struct fsverity_digest);
+ if (out_digest_sz < hash_alg->digest_size)
+ return -EOVERFLOW;
+
arg->digest_algorithm = hash_alg - fsverity_hash_algs;
arg->digest_size = hash_alg->digest_size;
- out_digest_sz = dynptr_sz - sizeof(struct fsverity_digest);
-
/* copy digest */
- memcpy(arg->digest, vi->file_digest,
- min(hash_alg->digest_size, out_digest_sz));
+ memcpy(arg->digest, vi->file_digest, hash_alg->digest_size);
/* fill the extra buffer with zeros */
if (out_digest_sz > hash_alg->digest_size)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 174/181] bpf, sockmap: Fix sk_redir use-after-free in send verdict
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (172 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 173/181] fsverity: Fix silent truncation in bpf_get_fsverity_digest() Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 175/181] scsi: scsi_debug: Negate wrapped memcmp() result Greg Kroah-Hartman
` (9 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Chengfeng Ye, John Fastabend,
Emil Tsalapatis, Kumar Kartikeya Dwivedi
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chengfeng Ye <nicoyip.dev@gmail.com>
commit a76624733730e541e4955fdecf506af2f6b20558 upstream.
sk_psock_msg_verdict() takes a socket reference for psock->sk_redir.
tcp_bpf_send_verdict() copies that pointer while holding the source socket
lock, but does not take a reference for the local copy before dropping the
lock around tcp_bpf_sendmsg_redir().
When apply_bytes keeps the cached verdict active, another sendmsg() on the
same source socket can consume the remaining bytes and release the cached
reference while the first thread still holds only the raw local pointer:
CPU 0 CPU 1
sk_redir = psock->sk_redir
apply_bytes remains nonzero
release_sock(sk)
lock_sock(sk)
apply_bytes reaches zero
psock->sk_redir = NULL
release_sock(sk)
tcp_bpf_sendmsg_redir(sk_redir)
sock_put(sk_redir)
tcp_bpf_sendmsg_redir(sk_redir)
The final sock_put() can free sk_redir before CPU 0 dereferences it.
KASAN reported:
BUG: KASAN: slab-use-after-free in tcp_bpf_sendmsg_redir+0xf39/0x1020
Read of size 8 at addr ffff888108537090 by task poc/87
Call Trace:
tcp_bpf_sendmsg_redir+0xf39/0x1020
tcp_bpf_sendmsg+0x977/0x1a50
__sys_sendto+0x32c/0x3a0
__x64_sys_sendto+0xdb/0x1b0
Allocated by task 85:
sk_prot_alloc+0x56/0x210
sk_clone+0x6f/0x14b0
inet_csk_clone_lock+0x24/0x740
tcp_create_openreq_child+0x25/0x2710
tcp_v4_syn_recv_sock+0x10a/0xe00
Freed by task 0:
__kasan_slab_free+0x43/0x70
slab_free_after_rcu_debug+0xa6/0x1e0
rcu_core+0x50a/0x1850
Last potentially related work creation:
__sk_destruct+0x3da/0x540
sk_psock_destroy+0x81e/0xab0
process_one_work+0x63a/0x1070
Take a temporary socket reference while the source socket lock still
protects psock->sk_redir, and drop it after tcp_bpf_sendmsg_redir()
returns. This keeps each unlocked use independent of cached-verdict
ownership.
Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Chengfeng Ye <nicoyip.dev@gmail.com>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/bpf/20260719152207.2892156-1-nicoyip.dev@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/tcp_bpf.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -455,6 +455,7 @@ more_data:
case __SK_REDIRECT:
redir_ingress = psock->redir_ingress;
sk_redir = psock->sk_redir;
+ sock_hold(sk_redir);
sk_msg_apply_bytes(psock, tosend);
if (!psock->apply_bytes) {
/* Clean up before releasing the sock lock. */
@@ -475,6 +476,7 @@ more_data:
if (eval == __SK_REDIRECT)
sock_put(sk_redir);
+ sock_put(sk_redir);
lock_sock(sk);
sk_mem_uncharge(sk, sent);
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 175/181] scsi: scsi_debug: Negate wrapped memcmp() result
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (173 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 174/181] bpf, sockmap: Fix sk_redir use-after-free in send verdict Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 176/181] sctp: keep chunk->transport in step with the list it is queued on Greg Kroah-Hartman
` (8 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Xu Rao, John Garry,
Martin K. Petersen (Oracle)
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xu Rao <raoxu@uniontech.com>
commit c4f6916a99cf105c3ff340b6210fcbba3fa66b35 upstream.
comp_write_worker() returns true when the compared data matches.
memcmp() returns zero for equal data and non-zero for different data, so
its result must be negated before it is stored in a bool.
The first segment already uses !memcmp(), but the wrapped segment uses
memcmp() directly, reversing the match result. Use !memcmp() there as
well.
Fixes: 38d5c8336e60 ("scsi_debug: add Report supported opcodes+tmfs; Compare and write")
Cc: stable@vger.kernel.org
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/E5AD42E9C0E18633+20260803095328.3445311-1-raoxu@uniontech.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/scsi/scsi_debug.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -3772,8 +3772,8 @@ static bool comp_write_worker(struct sde
if (!res)
return res;
if (rest)
- res = memcmp(fsp, arr + ((num - rest) * lb_size),
- rest * lb_size);
+ res = !memcmp(fsp, arr + ((num - rest) * lb_size),
+ rest * lb_size);
if (!res)
return res;
if (compare_only)
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 176/181] sctp: keep chunk->transport in step with the list it is queued on
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (174 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 175/181] scsi: scsi_debug: Negate wrapped memcmp() result Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 177/181] sctp: fix use-after-free of cached ASCONF chunk Greg Kroah-Hartman
` (7 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Baul Lee, Xin Long, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baul Lee <baul.lee@xbow.com>
commit 9f2cf069a9a72a2d6b97ca8b4c70e714aac99749 upstream.
__sctp_outq_flush_rtx() moves a gap-acked chunk onto another transport's
transmitted list without updating chunk->transport:
if (chunk->tsn_gap_acked) {
list_move_tail(&chunk->transmitted_list,
&transport->transmitted);
continue;
}
The chunk then sits on a live transport's list while chunk->transport still
names a different one. If that transport is removed - sctp_assoc_rm_peer()
from an ASCONF Delete-IP - sctp_transport_free() RCU-frees it and the chunk
is left with a dangling pointer. sctp_assoc_rm_peer() scrubs
peer->transmitted and asoc->outqueue.out_chunk_list, but the chunk is on
neither.
The pointer is not followed while tsn_gap_acked is set. A SACK that
reneges on the TSN clears the flag, and the next SACK reaches
tchunk->transport->flight_size -= sctp_data_size(tchunk);
inside the freed transport. KASAN reports a slab-use-after-free read in
sctp_check_transmitted(), freed from sctp_assoc_rm_peer(). Both the
removal and the SACKs come from the association peer.
Set chunk->transport at the move. The ordinary resend path needs nothing:
it reaches its list_move_tail() only after sctp_packet_append_chunk()
returned SCTP_XMIT_OK, and __sctp_packet_append_chunk() has rebound the
chunk by then.
Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Baul Lee <baul.lee@xbow.com>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20260729160028.54546-1-baul.lee@xbow.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sctp/outqueue.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -650,6 +650,7 @@ static int __sctp_outq_flush_rtx(struct
if (chunk->tsn_gap_acked) {
list_move_tail(&chunk->transmitted_list,
&transport->transmitted);
+ chunk->transport = transport;
continue;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 177/181] sctp: fix use-after-free of cached ASCONF chunk
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (175 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 176/181] sctp: keep chunk->transport in step with the list it is queued on Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 178/181] sctp: clear new_transport when removing a peer Greg Kroah-Hartman
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183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Xin Long, Yuxiang Yang,
Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yuxiang Yang <yangyx22@mails.tsinghua.edu.cn>
commit 8c283e7b56adce00193837f3311b06662466fb21 upstream.
addip_last_asconf caches the outstanding outbound ASCONF chunk. The normal
ASCONF-ACK completion path releases the chunk and clears the pointer.
However, sctp_asconf_queue_teardown() releases the cached chunk without
clearing addip_last_asconf. During peer restart handling,
sctp_sf_do_dupcook_a() queues SCTP_CMD_PURGE_ASCONF_QUEUE, which invokes
sctp_asconf_queue_teardown() while the association remains alive and leaves
the pointer dangling.
A delayed authenticated ASCONF-ACK can then reach sctp_sf_do_asconf_ack(),
which accesses the stale chunk and passes it to sctp_process_asconf_ack(),
causing a use-after-free and a second release.
Clearing the pointer exposes a race with T4 expiry. Peer restart handling
queues the timer stop before the purge, but SCTP_CMD_TIMER_STOP uses
timer_delete(), which does not wait for a callback already running on
another CPU. Such a callback can reach sctp_sf_t4_timer_expire() after
the purge and dereference NULL.
Clear addip_last_asconf after releasing the cached chunk, and make
sctp_sf_t4_timer_expire() consume a stale T4 expiry if no outstanding
ASCONF remains.
Fixes: a000c01e60e4 ("sctp: stop pending timers and purge queues when peer restart asoc")
Cc: stable@vger.kernel.org
Suggested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Yuxiang Yang <yangyx22@mails.tsinghua.edu.cn>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20260809043806.2768302-1-yangyx22@mails.tsinghua.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sctp/associola.c | 4 +++-
net/sctp/sm_statefuns.c | 6 +++++-
2 files changed, 8 insertions(+), 2 deletions(-)
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1731,6 +1731,8 @@ void sctp_asconf_queue_teardown(struct s
sctp_assoc_free_asconf_queue(asoc);
/* Free any cached ASCONF chunk. */
- if (asoc->addip_last_asconf)
+ if (asoc->addip_last_asconf) {
sctp_chunk_free(asoc->addip_last_asconf);
+ asoc->addip_last_asconf = NULL;
+ }
}
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -6110,8 +6110,12 @@ enum sctp_disposition sctp_sf_t4_timer_e
struct sctp_cmd_seq *commands)
{
struct sctp_chunk *chunk = asoc->addip_last_asconf;
- struct sctp_transport *transport = chunk->transport;
+ struct sctp_transport *transport;
+ if (!chunk)
+ return SCTP_DISPOSITION_CONSUME;
+
+ transport = chunk->transport;
SCTP_INC_STATS(net, SCTP_MIB_T4_RTO_EXPIREDS);
/* ADDIP 4.1 B1) Increment the error counters and perform path failure
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 178/181] sctp: clear new_transport when removing a peer
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (176 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 177/181] sctp: fix use-after-free of cached ASCONF chunk Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 179/181] thunderbolt: Bound the DROM dual link port number before indexing sw->ports Greg Kroah-Hartman
` (5 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Qing Ming, Xin Long, Jakub Kicinski
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qing Ming <a0yami@mailbox.org>
commit beb33f8ee1ca83acddb2a5ae80f3d22ec550b4c3 upstream.
sctp_process_asconf_param() stores a newly added peer transport in
asoc->new_transport. After all parameters in the ASCONF chunk have been
processed, sctp_sf_do_asconf() uses this pointer to send a HEARTBEAT to the
new transport.
An authenticated ASCONF from a remote SCTP peer can add a transport and
remove it again with a wildcard DEL-IP parameter in the same chunk. The
wildcard deletion preserves the transport on which the ASCONF arrived, but
removes the newly added transport through
sctp_assoc_del_nonprimary_peers(). The removal does not clear
asoc->new_transport, leaving it pointing to the removed transport.
sctp_sf_do_asconf() then creates a HEARTBEAT whose chunk->transport points
to the removed transport without holding a transport reference. During
local address replacement, src_out_of_asoc_ok keeps this HEARTBEAT on
control_chunk_list. After the transport is freed by RCU, a successful
ASCONF_ACK for the replacement address releases the queued HEARTBEAT and
sctp_outq_select_transport() reads the freed transport's state.
The issue was found during a static audit of SCTP objects. With an
authenticated peer, the reproducer triggered the same KASAN report in 2
of 2 unpatched runs on a KASAN-enabled netdev/main kernel:
BUG: KASAN: slab-use-after-free in sctp_outq_select_transport
Read of size 4 at addr ffff88800b9bd95c by task python3/197
Call Trace:
sctp_outq_select_transport+0x549/0x8b0 [sctp]
sctp_outq_flush+0x306/0x2c60 [sctp]
sctp_transport_immediate_rtx+0xaf/0x260 [sctp]
sctp_process_asconf_ack+0xa48/0xf70 [sctp]
Allocated by task 197:
sctp_transport_new+0x68/0x650 [sctp]
sctp_assoc_add_peer+0x258/0x12a0 [sctp]
sctp_process_asconf+0x5e9/0x1090 [sctp]
Last potentially related work creation:
__call_rcu_common.constprop.0+0x77/0xb70
sctp_assoc_del_nonprimary_peers+0x7c/0xd0 [sctp]
sctp_process_asconf+0xd9c/0x1090 [sctp]
The first invalid access was a four-byte read of transport->state at
net/sctp/outqueue.c:833. The same reproducer completed the full
authenticated ASCONF and local-address replacement sequence with this
change without a KASAN report or oops.
Clear new_transport when its peer is removed, before it can be used to
create the HEARTBEAT.
Fixes: 6af29ccc223b ("sctp: Bundle HEAERTBEAT into ASCONF_ACK")
Cc: stable@vger.kernel.org
Signed-off-by: Qing Ming <a0yami@mailbox.org>
Acked-by: Xin Long <lucien.xin@gmail.com>
Link: https://patch.msgid.link/20260811152803.5629-1-a0yami@mailbox.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/sctp/associola.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -543,6 +543,9 @@ void sctp_assoc_rm_peer(struct sctp_asso
asoc->addip_last_asconf->transport == peer)
asoc->addip_last_asconf->transport = NULL;
+ if (asoc->new_transport == peer)
+ asoc->new_transport = NULL;
+
/* If we have something on the transmitted list, we have to
* save it off. The best place is the active path.
*/
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 179/181] thunderbolt: Bound the DROM dual link port number before indexing sw->ports
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (177 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 178/181] sctp: clear new_transport when removing a peer Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 180/181] thunderbolt: Fix bandwidth group reservation indexing Greg Kroah-Hartman
` (4 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Bryam Vargas, Mika Westerberg
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bryam Vargas <hexlabsecurity@proton.me>
commit d6764992f17b23d91ff93ce905ab53c2aa7191f0 upstream.
tb_drom_parse_entry_port() validates the device-supplied header->index
against sw->config.max_port_number before indexing sw->ports[], but the
sibling field entry->dual_link_port_nr -- a 6-bit value also read from
the DROM -- indexes the same array with no such check. A malicious or
malformed Thunderbolt device can set dual_link_port_nr beyond the
allocated sw->ports[] (max_port_number + 1 entries), producing an
out-of-bounds tb_port pointer that is stored and later dereferenced.
Reject a port entry whose dual_link_port_nr exceeds max_port_number,
the same bound already applied to header->index.
Fixes: cd22e73bdf5e ("thunderbolt: Read port configuration from eeprom.")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/thunderbolt/eeprom.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/thunderbolt/eeprom.c
+++ b/drivers/thunderbolt/eeprom.c
@@ -392,9 +392,16 @@ static int tb_drom_parse_entry_port(stru
return -EIO;
}
port->link_nr = entry->link_nr;
- if (entry->has_dual_link_port)
+ if (entry->has_dual_link_port) {
+ if (entry->dual_link_port_nr > sw->config.max_port_number) {
+ tb_sw_warn(sw,
+ "port entry has invalid dual link port number %u\n",
+ entry->dual_link_port_nr);
+ return -EIO;
+ }
port->dual_link_port =
&port->sw->ports[entry->dual_link_port_nr];
+ }
}
return 0;
}
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 180/181] thunderbolt: Fix bandwidth group reservation indexing
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (178 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 179/181] thunderbolt: Bound the DROM dual link port number before indexing sw->ports Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 13:34 ` [PATCH 6.12 181/181] bpf: tcp: fix double sock release on batch realloc Greg Kroah-Hartman
` (3 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Xu Rao, Mika Westerberg
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xu Rao <raoxu@uniontech.com>
commit d2ee4d47aacbd2ba456092eeec670dba35fde291 upstream.
Valid bandwidth group IDs range from 1 through MAX_GROUPS, while Group
ID 0 is reserved. tb_consumed_dp_bandwidth() uses the Group ID directly
to index its local group_reserved[] array.
The array currently has MAX_GROUPS entries, so its valid indices are 0
through MAX_GROUPS - 1. Group ID MAX_GROUPS therefore accesses one
element past the end, and the final group's reserved bandwidth is not
included when the array is summed.
Give group_reserved[] MAX_GROUPS + 1 entries so direct Group ID
indexing covers the reserved ID 0 and valid IDs 1 through MAX_GROUPS.
Fixes: 52a4490e89d7 ("thunderbolt: Reserve released DisplayPort bandwidth for a group for 10 seconds")
Cc: stable@vger.kernel.org
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/thunderbolt/tb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -597,7 +597,7 @@ static int tb_consumed_dp_bandwidth(stru
int *consumed_up,
int *consumed_down)
{
- int group_reserved[MAX_GROUPS] = {};
+ int group_reserved[MAX_GROUPS + 1] = {};
struct tb_cm *tcm = tb_priv(tb);
struct tb_tunnel *tunnel;
bool downstream;
^ permalink raw reply [flat|nested] 185+ messages in thread* [PATCH 6.12 181/181] bpf: tcp: fix double sock release on batch realloc
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (179 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 180/181] thunderbolt: Fix bandwidth group reservation indexing Greg Kroah-Hartman
@ 2026-08-17 13:34 ` Greg Kroah-Hartman
2026-08-17 17:56 ` [PATCH 6.12 000/181] 6.12.104-rc1 review Pavel Machek
` (2 subsequent siblings)
183 siblings, 0 replies; 185+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-17 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, AutonomousCodeSecurity,
Xiang Mei (Microsoft), Eric Dumazet, Jordan Rife, Paolo Abeni
6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xiang Mei (Microsoft) <xmei5@asu.edu>
commit 980a813452754f8001704744e92f7aa697c53dd3 upstream.
bpf_iter_tcp_batch() releases the current batch via
bpf_iter_tcp_put_batch(), which drops the socket refs and rewrites
each slot with the socket cookie, then grows the batch. cur_sk/end_sk
are kept for bpf_iter_tcp_resume(), but on realloc failure the function
returns ERR_PTR() before resume runs, leaving cur_sk < end_sk over
slots that now hold cookies rather than sock pointers.
bpf_iter_tcp_seq_stop() then calls bpf_iter_tcp_put_batch() again and
dereferences a cookie as a struct sock.
Empty the batch on the failure path so stop() does not release it
again. The sockets were already freed by the first
bpf_iter_tcp_put_batch(), so nothing leaks, and a later read() rescans
the bucket from the start instead of skipping it. The sibling
GFP_NOWAIT failure path still holds real socket references and is left
for stop() to release.
BUG: KASAN: null-ptr-deref in __sock_gen_cookie
Read of size 8 at addr 0000000000000059 by task exploit
...
__sock_gen_cookie (net/core/sock_diag.c:28)
bpf_iter_tcp_put_batch (net/ipv4/tcp_ipv4.c:2918)
bpf_iter_tcp_seq_stop (net/ipv4/tcp_ipv4.c:3270)
bpf_seq_read (kernel/bpf/bpf_iter.c:205)
vfs_read (fs/read_write.c:572)
ksys_read (fs/read_write.c:716)
do_syscall_64
entry_SYSCALL_64_after_hwframe
Kernel panic - not syncing: Fatal exception
Fixes: cdec67a489d4 ("bpf: tcp: Make sure iter->batch always contains a full bucket snapshot")
Reported-by: AutonomousCodeSecurity@microsoft.com
Signed-off-by: Xiang Mei (Microsoft) <xmei5@asu.edu>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jordan Rife <jordan@jrife.io>
Link: https://patch.msgid.link/20260713233230.3553593-1-xmei5@asu.edu
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/tcp_ipv4.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3268,8 +3268,11 @@ again:
bpf_iter_tcp_put_batch(iter);
err = bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2,
GFP_USER);
- if (err)
+ if (err) {
+ iter->cur_sk = 0;
+ iter->end_sk = 0;
return ERR_PTR(err);
+ }
sk = bpf_iter_tcp_resume(seq);
if (!sk)
^ permalink raw reply [flat|nested] 185+ messages in thread* Re: [PATCH 6.12 000/181] 6.12.104-rc1 review
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (180 preceding siblings ...)
2026-08-17 13:34 ` [PATCH 6.12 181/181] bpf: tcp: fix double sock release on batch realloc Greg Kroah-Hartman
@ 2026-08-17 17:56 ` Pavel Machek
2026-08-17 19:18 ` Peter Schneider
2026-08-17 20:18 ` Florian Fainelli
183 siblings, 0 replies; 185+ messages in thread
From: Pavel Machek @ 2026-08-17 17:56 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: stable, patches, linux-kernel, torvalds, akpm, linux, shuah,
patches, lkft-triage, pavel, jonathanh, f.fainelli,
sudipm.mukherjee, rwarsow, conor, hargar, broonie, achill, sr
[-- Attachment #1: Type: text/plain, Size: 505 bytes --]
Hi!
> This is the start of the stable review cycle for the 6.12.104 release.
> There are 181 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
CIP testing did not find any problems here:
https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-6.12.y
Tested-by: Pavel Machek (CIP) <pavel@nabladev.com>
Best regards,
Pavel
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 195 bytes --]
^ permalink raw reply [flat|nested] 185+ messages in thread* Re: [PATCH 6.12 000/181] 6.12.104-rc1 review
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (181 preceding siblings ...)
2026-08-17 17:56 ` [PATCH 6.12 000/181] 6.12.104-rc1 review Pavel Machek
@ 2026-08-17 19:18 ` Peter Schneider
2026-08-17 20:18 ` Florian Fainelli
183 siblings, 0 replies; 185+ messages in thread
From: Peter Schneider @ 2026-08-17 19:18 UTC (permalink / raw)
To: Greg Kroah-Hartman, stable
Cc: patches, linux-kernel, torvalds, akpm, linux, shuah, patches,
lkft-triage, pavel, jonathanh, f.fainelli, sudipm.mukherjee,
rwarsow, conor, hargar, broonie, achill, sr
Am 17.08.2026 um 15:31 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.12.104 release.
> There are 181 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.
Tested-by: Peter Schneider <pschneider1968@googlemail.com>
Beste Grüße,
Peter Schneider
--
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you. -- David McCullough Jr.
OpenPGP: 0xA3828BD796CCE11A8CADE8866E3A92C92C3FF244
Download: https://www.peters-netzplatz.de/download/pschneider1968_pub.asc
https://keys.mailvelope.com/pks/lookup?op=get&search=pschneider1968@googlemail.com
https://keys.mailvelope.com/pks/lookup?op=get&search=pschneider1968@gmail.com
^ permalink raw reply [flat|nested] 185+ messages in thread* Re: [PATCH 6.12 000/181] 6.12.104-rc1 review
2026-08-17 13:31 [PATCH 6.12 000/181] 6.12.104-rc1 review Greg Kroah-Hartman
` (182 preceding siblings ...)
2026-08-17 19:18 ` Peter Schneider
@ 2026-08-17 20:18 ` Florian Fainelli
183 siblings, 0 replies; 185+ messages in thread
From: Florian Fainelli @ 2026-08-17 20:18 UTC (permalink / raw)
To: Greg Kroah-Hartman, stable
Cc: patches, linux-kernel, torvalds, akpm, linux, shuah, patches,
lkft-triage, pavel, jonathanh, sudipm.mukherjee, rwarsow, conor,
hargar, broonie, achill, sr
On 8/17/26 06:31, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.104 release.
> There are 181 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 19 Aug 2026 13:23:44 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.104-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels, build tested on
BMIPS_GENERIC:
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
--
Florian
^ permalink raw reply [flat|nested] 185+ messages in thread