* [PATCH 6.18 01/83] RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 02/83] RDMA/rxe: Fix OOB in free_rd_atomic_resources() Greg Kroah-Hartman
` (90 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Zhu Yanjun, Ibrahim Hashimov,
Leon Romanovsky, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ibrahim Hashimov <security@auditcode.ai>
[ Upstream commit 6f7014237405e7f032b5c53a82d9eccf6161c291 ]
rxe_qp_from_attr() handles IB_QP_MAX_DEST_RD_ATOMIC outside the
IB_QP_STATE path, so it holds no state_lock and runs while the responder
task rxe_receiver() (recv_task on rxe_wq) is live. A modify_qp() setting
only that attribute calls free_rd_atomic_resources() then
alloc_rd_atomic_resources(), swapping qp->resp.resources[] while
rxe_prepare_res()/find_resource() walk it; free_rd_atomic_resources()
also leaves the cached pointer qp->resp.res dangling. A local
unprivileged user can race the free/realloc into a use-after-free in
rxe_receiver() (local DoS).
Drain recv_task around the swap with rxe_disable_task()/rxe_enable_task(),
as rxe_qp_reset() already does when tearing this array down, re-enabling
only after alloc_rd_atomic_resources() succeeds so the responder never
resumes against a NULL qp->resp.resources on the ENOMEM path. Also clear
qp->resp.res in free_rd_atomic_resources(), like the rxe_resp.c
completion paths.
Reproduced under KASAN; the slab-use-after-free in rxe_receiver() is gone.
Fixes: 8700e3e7c485 ("Soft RoCE driver")
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Ibrahim Hashimov <security@auditcode.ai>
Link: https://patch.msgid.link/20260712121720.78001-1-security@auditcode.ai
Assisted-by: AuditCode-AI:2026.07
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/sw/rxe/rxe_qp.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index 95f1c1c2949de..0af697c6469db 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -124,6 +124,7 @@ static void free_rd_atomic_resources(struct rxe_qp *qp)
}
kfree(qp->resp.resources);
qp->resp.resources = NULL;
+ qp->resp.res = NULL;
}
}
@@ -660,11 +661,23 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
+ /*
+ * Not gated by IB_QP_STATE, so the responder task is live.
+ * Quiesce recv_task like rxe_qp_reset() before swapping the
+ * rd_atomic array, so rxe_receiver() cannot race the free/
+ * realloc.
+ */
+ rxe_disable_task(&qp->recv_task);
free_rd_atomic_resources(qp);
-
err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
+ /*
+ * On ENOMEM leave recv_task quiesced: qp->resp.resources is
+ * NULL and rxe_prepare_res()/find_resource() would deref it.
+ * Re-enable only after a fresh array is installed.
+ */
if (err)
return err;
+ rxe_enable_task(&qp->recv_task);
}
if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 02/83] RDMA/rxe: Fix OOB in free_rd_atomic_resources()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 01/83] RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 03/83] drm/xe/guc_ads: allocate UM queues in a separate BO Greg Kroah-Hartman
` (89 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Peiyang He, Zhu Yanjun,
Leon Romanovsky, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Peiyang He <peiyang_he@smail.nju.edu.cn>
[ Upstream commit de329533792a373186d79dca1ca120f8fa0afd05 ]
free_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic.
Updating max_dest_rd_atomic before freeing the old array can make the
free path walk past the old allocation and trigger a slab out-of-bounds
write catched by KASAN:
==================================================================
BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]
BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]
BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]
BUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712
Write of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063
CPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full)
Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xf7/0x600 mm/kasan/report.c:482
kasan_report+0xe4/0x120 mm/kasan/report.c:595
free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]
free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]
free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]
rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712
rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623
ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625
_ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915
modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932
ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958
ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680
vfs_write+0x2aa/0x1070 fs/read_write.c:686
ksys_write+0x1f8/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fefc75a70cd
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd
RDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007
RBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0
</TASK>
Allocated by task 11063:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5296 [inline]
__kmalloc_noprof+0x32a/0x850 mm/slub.c:5308
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline]
rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714
rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623
ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625
_ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915
modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932
ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958
ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680
vfs_write+0x2aa/0x1070 fs/read_write.c:686
ksys_write+0x1f8/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88802b8ddd80
which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes to the right of
allocated 56-byte region [ffff88802b8ddd80, ffff88802b8dddb8)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b8dd
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff888015c418c0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800200020 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4651, tgid 4651 ((udev-worker)), ts 123427165316, free_ts 123425874255
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0xfc/0x120 mm/page_alloc.c:1853
prep_new_page mm/page_alloc.c:1861 [inline]
get_page_from_freelist+0x75b/0x3220 mm/page_alloc.c:3941
__alloc_frozen_pages_noprof+0x27e/0x2b00 mm/page_alloc.c:5221
alloc_slab_page mm/slub.c:3278 [inline]
allocate_slab mm/slub.c:3467 [inline]
new_slab+0xa6/0x670 mm/slub.c:3525
refill_objects+0x278/0x420 mm/slub.c:7272
refill_sheaf mm/slub.c:2816 [inline]
__pcs_replace_empty_main+0x2ed/0x640 mm/slub.c:4652
alloc_from_pcs mm/slub.c:4750 [inline]
slab_alloc_node mm/slub.c:4884 [inline]
__do_kmalloc_node mm/slub.c:5295 [inline]
__kmalloc_noprof+0x68d/0x850 mm/slub.c:5308
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
tomoyo_encode2+0x100/0x3e0 security/tomoyo/realpath.c:45
tomoyo_encode+0x29/0x50 security/tomoyo/realpath.c:80
tomoyo_realpath_from_path+0x18c/0x690 security/tomoyo/realpath.c:283
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x2ab/0x3c0 security/tomoyo/file.c:776
tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
security_file_open+0x7a/0x1b0 security/security.c:2739
do_dentry_open+0x57e/0x1690 fs/open.c:924
vfs_open+0x82/0x3f0 fs/open.c:1079
do_open fs/namei.c:4699 [inline]
path_openat+0x218a/0x3190 fs/namei.c:4858
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1397 [inline]
__free_frozen_pages+0x763/0xfc0 mm/page_alloc.c:2938
selinux_genfs_get_sid security/selinux/hooks.c:1364 [inline]
inode_doinit_with_dentry+0x903/0x1320 security/selinux/hooks.c:1563
selinux_d_instantiate+0x26/0x30 security/selinux/hooks.c:6658
security_d_instantiate+0x123/0x190 security/security.c:3704
d_splice_alias_ops+0x92/0x850 fs/dcache.c:3141
kernfs_iop_lookup+0x23f/0x2d0 fs/kernfs/dir.c:1289
lookup_open.isra.0+0x659/0x1080 fs/namei.c:4484
open_last_lookups fs/namei.c:4611 [inline]
path_openat+0x17dd/0x3190 fs/namei.c:4855
do_file_open+0x20c/0x430 fs/namei.c:4887
do_sys_openat2+0x101/0x1d0 fs/open.c:1364
do_sys_open fs/open.c:1370 [inline]
__do_sys_openat fs/open.c:1386 [inline]
__se_sys_openat fs/open.c:1381 [inline]
__x64_sys_openat+0x141/0x200 fs/open.c:1381
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88802b8ddc80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
ffff88802b8ddd00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88802b8ddd80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
^
ffff88802b8dde00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
ffff88802b8dde80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
Fix the OOB by moving the assignment after free_rd_atomic_resources()
so the old array is freed using the old bound. This matches the original
ordering in commit 8700e3e7c485 ("Soft RoCE driver").
Closes: https://lore.kernel.org/all/365C68B4923F8214+30195a67-0b90-4b92-ab96-2ce41517793c@smail.nju.edu.cn/
Fixes: b6bbee0d2438 ("IB/rxe: Properly honor max IRD value for rd/atomic.")
Cc: stable@vger.kernel.org
Signed-off-by: Peiyang He <peiyang_he@smail.nju.edu.cn>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/sw/rxe/rxe_qp.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index 0af697c6469db..c31c0c9a53828 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -659,8 +659,6 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
- qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
-
/*
* Not gated by IB_QP_STATE, so the responder task is live.
* Quiesce recv_task like rxe_qp_reset() before swapping the
@@ -669,6 +667,7 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
*/
rxe_disable_task(&qp->recv_task);
free_rd_atomic_resources(qp);
+ qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
/*
* On ENOMEM leave recv_task quiesced: qp->resp.resources is
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 03/83] drm/xe/guc_ads: allocate UM queues in a separate BO
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 01/83] RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 02/83] RDMA/rxe: Fix OOB in free_rd_atomic_resources() Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 04/83] drm/xe/guc_ads: allocate UM queues in VRAM on dGFX Greg Kroah-Hartman
` (88 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Gwan-gyeong Mun, Matthew Auld,
Jia Yao, Thomas Hellström, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jia Yao <jia.yao@intel.com>
commit 99b01815957bd7d848420cb697f79ed11f7f215c upstream.
Move the UM queues into a dedicated BO (ads->um_queue_bo) and avoid
CPU memset operations on it, which eliminates the CPU as a potential
cacheline-polluting agent and helps maintain consistency between GAM
writes and GuC reads.
We also need to ensure the base_dpa for the queue is contiguous on hw
where this is used instead of a GGTT address. Another good reason to
split this out to a separate BO.
Fixes: 9c57bc08652a ("drm/xe/lnl: Drop force_probe requirement")
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v6.12+
Signed-off-by: Jia Yao <jia.yao@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patch.msgid.link/20260804165057.129529-2-jia.yao@intel.com
(cherry picked from commit 99b01815957bd7d848420cb697f79ed11f7f215c)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/xe/xe_bo.h | 14 +++++
drivers/gpu/drm/xe/xe_guc.c | 6 ++
drivers/gpu/drm/xe/xe_guc_ads.c | 89 +++++++++++++++++----------
drivers/gpu/drm/xe/xe_guc_ads_types.h | 5 ++
4 files changed, 82 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/xe/xe_bo.h b/drivers/gpu/drm/xe/xe_bo.h
index fef60c8a4e5b1..71169b57fbda4 100644
--- a/drivers/gpu/drm/xe/xe_bo.h
+++ b/drivers/gpu/drm/xe/xe_bo.h
@@ -6,6 +6,7 @@
#ifndef _XE_BO_H_
#define _XE_BO_H_
+#include <drm/drm_prime.h>
#include <drm/ttm/ttm_tt.h>
#include "xe_bo_types.h"
@@ -455,6 +456,19 @@ void xe_bo_dev_fini(struct xe_bo_dev *bo_device);
struct sg_table *xe_bo_sg(struct xe_bo *bo);
+/**
+ * xe_bo_sg_is_contiguous() - Check if a BO's DMA address space is contiguous.
+ * @bo: the BO to check (must have a valid sg table, i.e. !xe_bo_is_vram())
+ * @len: required contiguous length in bytes
+ *
+ * Returns true if the first @len bytes of the BO are mapped to a contiguous
+ * DMA address range.
+ */
+static inline bool xe_bo_sg_is_contiguous(struct xe_bo *bo, size_t len)
+{
+ return drm_prime_get_contiguous_size(xe_bo_sg(bo)) >= len;
+}
+
/*
* xe_sg_segment_size() - Provides upper limit for sg segment size.
* @dev: device pointer
diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index ae0c88da422b2..cc5741f751b93 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -700,6 +700,12 @@ static int xe_guc_realloc_post_hwconfig(struct xe_guc *guc)
if (ret)
return ret;
+ if (guc->ads.um_queue_bo) {
+ ret = xe_managed_bo_reinit_in_vram(xe, tile, &guc->ads.um_queue_bo);
+ if (ret)
+ return ret;
+ }
+
return 0;
}
diff --git a/drivers/gpu/drm/xe/xe_guc_ads.c b/drivers/gpu/drm/xe/xe_guc_ads.c
index db71823b25380..86e6651c00363 100644
--- a/drivers/gpu/drm/xe/xe_guc_ads.c
+++ b/drivers/gpu/drm/xe/xe_guc_ads.c
@@ -65,10 +65,14 @@ ads_to_map(struct xe_guc_ads *ads)
/*
* The Additional Data Struct (ADS) has pointers for different buffers used by
- * the GuC. One single gem object contains the ADS struct itself (guc_ads) and
- * all the extra buffers indirectly linked via the ADS struct's entries.
+ * the GuC. One gem object (ads->bo) contains the ADS struct itself (guc_ads)
+ * and most of the extra buffers linked via the ADS struct's entries. The UM
+ * fault queues (PAGE_FAULT, PAGE_FAULT_RESPONSE, ACCESS_COUNTER rings) are
+ * kept in a separate BO (ads->um_queue_bo) so that the full memset of ads->bo
+ * performed on every GT reset does not discard fault descriptors already
+ * written into the rings by the GPU.
*
- * Layout of the ADS blob allocated for the GuC:
+ * Layout of the ADS blob (ads->bo):
*
* +---------------------------------------+ <== base
* | guc_ads |
@@ -100,10 +104,6 @@ ads_to_map(struct xe_guc_ads *ads)
* +---------------------------------------+
* | padding |
* +---------------------------------------+ <== 4K aligned
- * | UM queues |
- * +---------------------------------------+
- * | padding |
- * +---------------------------------------+ <== 4K aligned
* | private data |
* +---------------------------------------+
* | padding |
@@ -157,16 +157,6 @@ static size_t guc_ads_capture_size(struct xe_guc_ads *ads)
return PAGE_ALIGN(ads->capture_size);
}
-static size_t guc_ads_um_queues_size(struct xe_guc_ads *ads)
-{
- struct xe_device *xe = ads_to_xe(ads);
-
- if (!xe->info.has_usm)
- return 0;
-
- return GUC_UM_QUEUE_SIZE * GUC_UM_HW_QUEUE_MAX;
-}
-
static size_t guc_ads_private_data_size(struct xe_guc_ads *ads)
{
return PAGE_ALIGN(ads_to_guc(ads)->fw.private_data_size);
@@ -207,22 +197,12 @@ static size_t guc_ads_capture_offset(struct xe_guc_ads *ads)
return PAGE_ALIGN(offset);
}
-static size_t guc_ads_um_queues_offset(struct xe_guc_ads *ads)
-{
- u32 offset;
-
- offset = guc_ads_capture_offset(ads) +
- guc_ads_capture_size(ads);
-
- return PAGE_ALIGN(offset);
-}
-
static size_t guc_ads_private_data_offset(struct xe_guc_ads *ads)
{
size_t offset;
- offset = guc_ads_um_queues_offset(ads) +
- guc_ads_um_queues_size(ads);
+ offset = guc_ads_capture_offset(ads) +
+ guc_ads_capture_size(ads);
return PAGE_ALIGN(offset);
}
@@ -408,6 +388,45 @@ int xe_guc_ads_init(struct xe_guc_ads *ads)
ads->bo = bo;
+ if (xe->info.has_usm) {
+ /*
+ * Allocate a separate BO for the HW fault ring (UM queues).
+ *
+ * Round the size up to the next power of two so that
+ * (system memory, no IOMMU) the TTM pool issues a single
+ * alloc_pages(order=N) call, maximising the chance of getting
+ * a physically contiguous block. GuC requires contiguous DPA.
+ */
+ size_t um_size = roundup_pow_of_two(GUC_UM_QUEUE_SIZE *
+ GUC_UM_HW_QUEUE_MAX);
+
+ u32 um_flags = XE_BO_FLAG_SYSTEM |
+ XE_BO_FLAG_GGTT |
+ XE_BO_FLAG_GGTT_INVALIDATE |
+ XE_BO_FLAG_PINNED_NORESTORE;
+
+ bo = xe_managed_bo_create_pin_map(xe, tile, um_size, um_flags);
+ if (IS_ERR(bo))
+ return PTR_ERR(bo);
+
+ /*
+ * On pre-Xe3p platforms, GAM (not GuC) accesses the UM queue
+ * ring via base_dpa, which must be a contiguous DMA address
+ * range. Verify that the allocated pages are contiguous in
+ * DMA address space.
+ */
+ if (!xe_bo_is_vram(bo) &&
+ unlikely(!xe_bo_sg_is_contiguous(bo,
+ GUC_UM_QUEUE_SIZE *
+ GUC_UM_HW_QUEUE_MAX))) {
+ drm_err(&xe->drm,
+ "UM fault queue memory is not contiguous in DMA address space; GAM requires contiguous DPA\n");
+ return -ENOMEM;
+ }
+
+ ads->um_queue_bo = bo;
+ }
+
return 0;
}
ALLOW_ERROR_INJECTION(xe_guc_ads_init, ERRNO); /* See xe_pci_probe() */
@@ -824,13 +843,19 @@ static void guc_mmio_reg_state_init(struct xe_guc_ads *ads)
static void guc_um_init_params(struct xe_guc_ads *ads)
{
- u32 um_queue_offset = guc_ads_um_queues_offset(ads);
+ struct xe_bo *um_bo = ads->um_queue_bo;
u64 base_dpa;
u32 base_ggtt;
int i;
- base_ggtt = xe_bo_ggtt_addr(ads->bo) + um_queue_offset;
- base_dpa = xe_bo_main_addr(ads->bo, PAGE_SIZE) + um_queue_offset;
+ if (um_bo) {
+ /* All USM platforms: UM queues in dedicated um_queue_bo */
+ base_ggtt = xe_bo_ggtt_addr(um_bo);
+ base_dpa = xe_bo_main_addr(um_bo, PAGE_SIZE);
+ } else {
+ /* Platform does not support USM: no UM queues, nothing to do */
+ return;
+ }
for (i = 0; i < GUC_UM_HW_QUEUE_MAX; ++i) {
ads_blob_write(ads, um_init_params.queue_params[i].base_dpa,
diff --git a/drivers/gpu/drm/xe/xe_guc_ads_types.h b/drivers/gpu/drm/xe/xe_guc_ads_types.h
index 70c132458ac38..acb5366f76efe 100644
--- a/drivers/gpu/drm/xe/xe_guc_ads_types.h
+++ b/drivers/gpu/drm/xe/xe_guc_ads_types.h
@@ -16,6 +16,11 @@ struct xe_bo;
struct xe_guc_ads {
/** @bo: XE BO for GuC ads blob */
struct xe_bo *bo;
+ /**
+ * @um_queue_bo: Dedicated BO for the HW fault ring (UM queues).
+ * NULL if the platform does not support USM.
+ */
+ struct xe_bo *um_queue_bo;
/** @golden_lrc_size: golden LRC size */
size_t golden_lrc_size;
/** @regset_size: size of register set passed to GuC for save/restore */
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 04/83] drm/xe/guc_ads: allocate UM queues in VRAM on dGFX
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (2 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 03/83] drm/xe/guc_ads: allocate UM queues in a separate BO Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 05/83] drm/xe/guc_ads: use uncached mapping for UM queue BO Greg Kroah-Hartman
` (87 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Gwan-gyeong Mun, Matthew Auld,
Jia Yao, Thomas Hellström, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jia Yao <jia.yao@intel.com>
commit f342810a141f8a7e8b3786a6e4b6c0695a078a74 upstream.
On iGPU, the UM queue BO is allocated in system memory. On dGFX, the BO
was previously created in system memory and later reallocated in
xe_guc_realloc_post_hwconfig(). Allocate the UM queue BO directly in
VRAM on dGFX, where it is ultimately required.
Fixes: 9c57bc08652a ("drm/xe/lnl: Drop force_probe requirement")
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v6.12+
Signed-off-by: Jia Yao <jia.yao@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patch.msgid.link/20260804165057.129529-3-jia.yao@intel.com
(cherry picked from commit f342810a141f8a7e8b3786a6e4b6c0695a078a74)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/xe/xe_guc.c | 6 ------
drivers/gpu/drm/xe/xe_guc_ads.c | 8 +++++---
2 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index cc5741f751b93..ae0c88da422b2 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -700,12 +700,6 @@ static int xe_guc_realloc_post_hwconfig(struct xe_guc *guc)
if (ret)
return ret;
- if (guc->ads.um_queue_bo) {
- ret = xe_managed_bo_reinit_in_vram(xe, tile, &guc->ads.um_queue_bo);
- if (ret)
- return ret;
- }
-
return 0;
}
diff --git a/drivers/gpu/drm/xe/xe_guc_ads.c b/drivers/gpu/drm/xe/xe_guc_ads.c
index 86e6651c00363..4f48356ae622b 100644
--- a/drivers/gpu/drm/xe/xe_guc_ads.c
+++ b/drivers/gpu/drm/xe/xe_guc_ads.c
@@ -392,15 +392,17 @@ int xe_guc_ads_init(struct xe_guc_ads *ads)
/*
* Allocate a separate BO for the HW fault ring (UM queues).
*
- * Round the size up to the next power of two so that
+ * Round the size up to the next power of two so that on iGPU
* (system memory, no IOMMU) the TTM pool issues a single
* alloc_pages(order=N) call, maximising the chance of getting
* a physically contiguous block. GuC requires contiguous DPA.
*/
- size_t um_size = roundup_pow_of_two(GUC_UM_QUEUE_SIZE *
+ size_t um_size = IS_DGFX(xe) ?
+ GUC_UM_QUEUE_SIZE * GUC_UM_HW_QUEUE_MAX :
+ roundup_pow_of_two(GUC_UM_QUEUE_SIZE *
GUC_UM_HW_QUEUE_MAX);
- u32 um_flags = XE_BO_FLAG_SYSTEM |
+ u32 um_flags = XE_BO_FLAG_VRAM_IF_DGFX(tile) |
XE_BO_FLAG_GGTT |
XE_BO_FLAG_GGTT_INVALIDATE |
XE_BO_FLAG_PINNED_NORESTORE;
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 05/83] drm/xe/guc_ads: use uncached mapping for UM queue BO
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (3 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 04/83] drm/xe/guc_ads: allocate UM queues in VRAM on dGFX Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 06/83] KVM: x86/mmu: Check write tracking in all address spaces Greg Kroah-Hartman
` (86 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Gwan-gyeong Mun, Matthew Auld,
Jia Yao, Thomas Hellström, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jia Yao <jia.yao@intel.com>
commit 8d5134ae4177fa4f5a9bc8e71e6656cfc2852882 upstream.
On Pre-Xe3p platform, the GAM write the UM queue through DPA using UC.
if GuC reads the queue via GGTT (WB), stale data may be observed
when the cacheline has been polluted by another agent.
To match the GAM's UC writes, configure the GuC mapping as UC as well.
Fixes: 9c57bc08652a ("drm/xe/lnl: Drop force_probe requirement")
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v6.12+
Signed-off-by: Jia Yao <jia.yao@intel.com>
Reviewed by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patch.msgid.link/20260804165057.129529-4-jia.yao@intel.com
(cherry picked from commit 8d5134ae4177fa4f5a9bc8e71e6656cfc2852882)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/xe/xe_guc_ads.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/xe/xe_guc_ads.c b/drivers/gpu/drm/xe/xe_guc_ads.c
index 4f48356ae622b..63017ae2c3818 100644
--- a/drivers/gpu/drm/xe/xe_guc_ads.c
+++ b/drivers/gpu/drm/xe/xe_guc_ads.c
@@ -405,7 +405,8 @@ int xe_guc_ads_init(struct xe_guc_ads *ads)
u32 um_flags = XE_BO_FLAG_VRAM_IF_DGFX(tile) |
XE_BO_FLAG_GGTT |
XE_BO_FLAG_GGTT_INVALIDATE |
- XE_BO_FLAG_PINNED_NORESTORE;
+ XE_BO_FLAG_PINNED_NORESTORE |
+ XE_BO_FLAG_NEEDS_UC;
bo = xe_managed_bo_create_pin_map(xe, tile, um_size, um_flags);
if (IS_ERR(bo))
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 06/83] KVM: x86/mmu: Check write tracking in all address spaces
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (4 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 05/83] drm/xe/guc_ads: use uncached mapping for UM queue BO Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 07/83] nvme-tcp: fix usage of page_frag_cache Greg Kroah-Hartman
` (85 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jinu Kim, Paolo Bonzini, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jinu Kim <kimjw04271234@gmail.com>
[ Upstream commit 0f38453cdb2e17566ccb7c0f3dabd5bd21caca26 ]
kvm_gfn_is_write_tracked() checks only the supplied memslot, but page
tracking is per-address-space and shadow pages are shared across all
address spaces. With SMM, a GFN can therefore be write-tracked in one
address space and appear untracked through the other.
Check the supplied slot first, then the slot for the other address space.
This ensures all callers honor write tracking regardless of the active
address space. In particular, it prevents mmu_try_to_unsync_pages() from
marking an upper-level shadow page unsync and eventually triggering the
BUG in pte_list_remove().
Fixes: 699023e23965 ("KVM: x86: add SMM to the MMU role, support SMRAM address space")
Assisted-by: Codex:GPT-5
Signed-off-by: Jinu Kim <kimjw04271234@gmail.com>
Message-ID: <20260721103512.2136240-2-kimjw04271234@gmail.com>
[invert direction of the conditional. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/kvm/mmu/page_track.c | 32 ++++++++++++++++++++++++++------
1 file changed, 26 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c
index 1b17b12393a8c..7e8195a311bb0 100644
--- a/arch/x86/kvm/mmu/page_track.c
+++ b/arch/x86/kvm/mmu/page_track.c
@@ -130,13 +130,23 @@ void __kvm_write_track_remove_gfn(struct kvm *kvm,
kvm_mmu_gfn_allow_lpage(slot, gfn);
}
-/*
- * check if the corresponding access on the specified guest page is tracked.
- */
+static bool __kvm_gfn_is_write_tracked(const struct kvm_memory_slot *slot,
+ gfn_t gfn)
+{
+ int index;
+
+ if (!slot)
+ return false;
+
+ index = gfn_to_index(gfn, slot->base_gfn, PG_LEVEL_4K);
+ return !!READ_ONCE(slot->arch.gfn_write_track[index]);
+}
+
+/* check if write access is tracked on the specified guest page. */
bool kvm_gfn_is_write_tracked(struct kvm *kvm,
const struct kvm_memory_slot *slot, gfn_t gfn)
{
- int index;
+ const struct kvm_memory_slot *other_slot;
if (!slot)
return false;
@@ -144,8 +154,18 @@ bool kvm_gfn_is_write_tracked(struct kvm *kvm,
if (!kvm_page_track_write_tracking_enabled(kvm))
return false;
- index = gfn_to_index(gfn, slot->base_gfn, PG_LEVEL_4K);
- return !!READ_ONCE(slot->arch.gfn_write_track[index]);
+ BUILD_BUG_ON(KVM_MAX_NR_ADDRESS_SPACES > 2);
+
+ if (__kvm_gfn_is_write_tracked(slot, gfn))
+ return true;
+
+ if (kvm_arch_nr_memslot_as_ids(kvm) > 1) {
+ other_slot = __gfn_to_memslot(__kvm_memslots(kvm, slot->as_id ^ 1), gfn);
+ if (__kvm_gfn_is_write_tracked(other_slot, gfn))
+ return true;
+ }
+
+ return false;
}
#ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 07/83] nvme-tcp: fix usage of page_frag_cache
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (5 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 06/83] KVM: x86/mmu: Check write tracking in all address spaces Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 08/83] Revert "selinux: reject a permission value exceeding the class permission count" Greg Kroah-Hartman
` (84 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Dmitry Bogdanov, Daniel Wagner,
Keith Busch, Carlos Bilbao (Lambda), Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Bogdanov <d.bogdanov@yadro.com>
commit 36ac05f7cfd59d90c597071304b14e98090d5dd1 upstream.
nvme uses page_frag_cache to preallocate PDU for each preallocated request
of block device. Block devices are created in parallel threads,
consequently page_frag_cache is used in not thread-safe manner.
That leads to incorrect refcounting of backstore pages and premature free.
That can be catched by !sendpage_ok inside network stack:
WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310.
tcp_sendmsg_locked+0x782/0xce0
tcp_sendmsg+0x27/0x40
sock_sendmsg+0x8b/0xa0
nvme_tcp_try_send_cmd_pdu+0x149/0x2a0
Then random panic may occur.
Fix that by serializing the usage of page_frag_cache.
Fixes: 4e893ca81170 ("nvme_core: scan namespaces asynchronously")
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
[carlos.bilbao: adjust context in nvme_tcp_free_queue; branch predates
19bdb70c77d3 ("nvme-tcp: lockdep: use dynamic lockdep keys per socket
instance")]
Signed-off-by: Carlos Bilbao (Lambda) <carlos.bilbao@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/tcp.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index afdbcff3d4821..04c074ae8f7bb 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -145,6 +145,7 @@ struct nvme_tcp_queue {
struct mutex queue_lock;
struct mutex send_mutex;
+ struct mutex pf_cache_lock;
struct llist_head req_list;
struct list_head send_list;
@@ -556,9 +557,11 @@ static int nvme_tcp_init_request(struct blk_mq_tag_set *set,
struct nvme_tcp_queue *queue = &ctrl->queues[queue_idx];
u8 hdgst = nvme_tcp_hdgst_len(queue);
+ mutex_lock(&queue->pf_cache_lock);
req->pdu = page_frag_alloc(&queue->pf_cache,
sizeof(struct nvme_tcp_cmd_pdu) + hdgst,
GFP_KERNEL | __GFP_ZERO);
+ mutex_unlock(&queue->pf_cache_lock);
if (!req->pdu)
return -ENOMEM;
@@ -1423,9 +1426,11 @@ static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl)
struct nvme_tcp_request *async = &ctrl->async_req;
u8 hdgst = nvme_tcp_hdgst_len(queue);
+ mutex_lock(&queue->pf_cache_lock);
async->pdu = page_frag_alloc(&queue->pf_cache,
sizeof(struct nvme_tcp_cmd_pdu) + hdgst,
GFP_KERNEL | __GFP_ZERO);
+ mutex_unlock(&queue->pf_cache_lock);
if (!async->pdu)
return -ENOMEM;
@@ -1453,6 +1458,7 @@ static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
kfree(queue->pdu);
mutex_destroy(&queue->send_mutex);
mutex_destroy(&queue->queue_lock);
+ mutex_destroy(&queue->pf_cache_lock);
}
static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue)
@@ -1775,6 +1781,7 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
INIT_LIST_HEAD(&queue->send_list);
mutex_init(&queue->send_mutex);
INIT_WORK(&queue->io_work, nvme_tcp_io_work);
+ mutex_init(&queue->pf_cache_lock);
if (qid > 0)
queue->cmnd_capsule_len = nctrl->ioccsz * 16;
@@ -1906,6 +1913,7 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
err_destroy_mutex:
mutex_destroy(&queue->send_mutex);
mutex_destroy(&queue->queue_lock);
+ mutex_destroy(&queue->pf_cache_lock);
return ret;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 08/83] Revert "selinux: reject a permission value exceeding the class permission count"
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (6 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 07/83] nvme-tcp: fix usage of page_frag_cache Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 09/83] selinux: use u16 for security classes Greg Kroah-Hartman
` (83 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Wentao Guan, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Wentao Guan <guanwentao@uniontech.com>
This reverts commit 9b46fba7528f58ca09eac67ec7d474ff1e9af066.
The stable pick applied the nprim bound after symtab_insert() because
the upstream context (the SEL_VEC_MAX check from commit 18fa21f10d00
"selinux: more strict policy parsing") does not exist in this tree.
On that error path perm_destroy() frees a key/datum pair that is
already linked into the symtab, leading to a double free when the
failed policydb is torn down.
Drop it here; it is re-applied later in this series in its upstream
form, after its strict-parsing prerequisite.
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
security/selinux/ss/policydb.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index fdb8a62da04ad..69c19ef4b8817 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1168,9 +1168,6 @@ static int perm_read(struct policydb *p, struct symtab *s, struct policy_file *f
rc = symtab_insert(s, key, perdatum);
if (rc)
goto bad;
- /* indexes an nprim-sized array in security_get_permissions() */
- if (perdatum->value > s->nprim)
- goto bad;
return 0;
bad:
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 09/83] selinux: use u16 for security classes
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (7 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 08/83] Revert "selinux: reject a permission value exceeding the class permission count" Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 10/83] selinux: more strict policy parsing Greg Kroah-Hartman
` (82 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Christian Göttsche,
Stephen Smalley, Paul Moore, Wentao Guan, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Göttsche <cgzones@googlemail.com>
[ Upstream commit fa79a596848fe38c55ccab8832ac35dac07fb00c ]
Security class identifiers are limited to 2^16, thus use the appropriate
type u16 consistently.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
(cherry picked from commit fa79a596848fe38c55ccab8832ac35dac07fb00c)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
security/selinux/ss/policydb.c | 5 +++--
security/selinux/ss/policydb.h | 10 +++++-----
security/selinux/ss/services.c | 2 +-
3 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 69c19ef4b8817..4c3cc98f87752 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -951,7 +951,7 @@ int policydb_load_isids(struct policydb *p, struct sidtab *s)
return 0;
}
-int policydb_class_isvalid(struct policydb *p, unsigned int class)
+int policydb_class_isvalid(struct policydb *p, u16 class)
{
if (!class || class > p->p_classes.nprim)
return 0;
@@ -2039,7 +2039,8 @@ static int filename_trans_read_helper(struct policydb *p, struct policy_file *fp
struct filename_trans_key *ft = NULL;
struct filename_trans_datum **dst, *datum, *first = NULL;
char *name = NULL;
- u32 len, ttype, tclass, ndatum, i;
+ u32 len, ttype, ndatum, i;
+ u16 tclass;
__le32 buf[3];
int rc;
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index 89a180b1742fb..a49275d1168d8 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -48,7 +48,7 @@ struct common_datum {
/* Class attributes */
struct class_datum {
- u32 value; /* class value */
+ u16 value; /* class value */
char *comkey; /* common name */
struct common_datum *comdatum; /* common datum */
struct symtab permissions; /* class-specific permission symbol table */
@@ -82,7 +82,7 @@ struct role_datum {
struct role_trans_key {
u32 role; /* current role */
u32 type; /* program executable type, or new object type */
- u32 tclass; /* process class, or new object class */
+ u16 tclass; /* process class, or new object class */
};
struct role_trans_datum {
@@ -139,7 +139,7 @@ struct cat_datum {
struct range_trans {
u32 source_type;
u32 target_type;
- u32 target_class;
+ u16 target_class;
};
/* Boolean data type */
@@ -195,7 +195,7 @@ struct ocontext {
} ibendport;
} u;
union {
- u32 sclass; /* security class for genfs */
+ u16 sclass; /* security class for genfs */
u32 behavior; /* labeling behavior for fs_use */
} v;
struct context context[2]; /* security context(s) */
@@ -322,7 +322,7 @@ struct policy_file {
extern void policydb_destroy(struct policydb *p);
extern int policydb_load_isids(struct policydb *p, struct sidtab *s);
extern int policydb_context_isvalid(struct policydb *p, struct context *c);
-extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
+extern int policydb_class_isvalid(struct policydb *p, u16 class);
extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
extern int policydb_read(struct policydb *p, struct policy_file *fp);
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 82608b34260fd..cbc101b095a30 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -3290,7 +3290,7 @@ static int get_classes_callback(void *k, void *d, void *args)
{
struct class_datum *datum = d;
char *name = k, **classes = args;
- u32 value = datum->value - 1;
+ u16 value = datum->value - 1;
classes[value] = kstrdup(name, GFP_ATOMIC);
if (!classes[value])
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 10/83] selinux: more strict policy parsing
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (8 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 09/83] selinux: use u16 for security classes Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 11/83] selinux: reject a permission value exceeding the class permission count Greg Kroah-Hartman
` (81 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Christian Göttsche,
Stephen Smalley, Paul Moore, Wentao Guan, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Göttsche <cgzones@googlemail.com>
[ Upstream commit 18fa21f10d008a0fc22565109c7d38f304295912 ]
Be more strict during parsing of policies and reject invalid values.
Add some error messages in the case of policy parse failures, to
enhance debugging, either on a malformed policy or a too strict check.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
[PM: fixed checkpatch.pl warnings, style problems]
Signed-off-by: Paul Moore <paul@paul-moore.com>
(cherry picked from commit 18fa21f10d008a0fc22565109c7d38f304295912)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
security/selinux/include/security.h | 1 +
security/selinux/ss/avtab.c | 35 ++++-
security/selinux/ss/avtab.h | 13 ++
security/selinux/ss/conditional.c | 18 +--
security/selinux/ss/constraint.h | 1 +
security/selinux/ss/policydb.c | 196 +++++++++++++++++++++++-----
security/selinux/ss/policydb.h | 23 +++-
security/selinux/ss/services.c | 6 +-
8 files changed, 233 insertions(+), 60 deletions(-)
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 30e3fa962f6fa..f698ff7962282 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -225,6 +225,7 @@ int security_read_policy(void **data, size_t *len);
int security_read_state_kernel(void **data, size_t *len);
int security_policycap_supported(unsigned int req_cap);
+/* Maximum supported number of permissions per class */
#define SEL_VEC_MAX 32
struct av_decision {
u32 allowed;
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index c2c31521cace1..33556922f15ed 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -349,7 +349,7 @@ int avtab_read_item(struct avtab *a, struct policy_file *fp, struct policydb *po
struct avtab_extended_perms xperms;
__le32 buf32[ARRAY_SIZE(xperms.perms.p)];
int rc;
- unsigned int set, vers = pol->policyvers;
+ unsigned int vers = pol->policyvers;
memset(&key, 0, sizeof(struct avtab_key));
memset(&datum, 0, sizeof(struct avtab_datum));
@@ -360,9 +360,12 @@ int avtab_read_item(struct avtab *a, struct policy_file *fp, struct policydb *po
pr_err("SELinux: avtab: truncated entry\n");
return rc;
}
+ /* Read five or more items: source type, target type,
+ * target class, AV type, and at least one datum.
+ */
items2 = le32_to_cpu(buf32[0]);
- if (items2 > ARRAY_SIZE(buf32)) {
- pr_err("SELinux: avtab: entry overflow\n");
+ if (items2 < 5 || items2 > ARRAY_SIZE(buf32)) {
+ pr_err("SELinux: avtab: invalid item count\n");
return -EINVAL;
}
rc = next_entry(buf32, fp, sizeof(u32) * items2);
@@ -391,6 +394,13 @@ int avtab_read_item(struct avtab *a, struct policy_file *fp, struct policydb *po
return -EINVAL;
}
+ if (!policydb_type_isvalid(pol, key.source_type) ||
+ !policydb_type_isvalid(pol, key.target_type) ||
+ !policydb_class_isvalid(pol, key.target_class)) {
+ pr_err("SELinux: avtab: invalid type or class\n");
+ return -EINVAL;
+ }
+
val = le32_to_cpu(buf32[items++]);
enabled = (val & AVTAB_ENABLED_OLD) ? AVTAB_ENABLED : 0;
@@ -409,6 +419,11 @@ int avtab_read_item(struct avtab *a, struct policy_file *fp, struct policydb *po
for (i = 0; i < ARRAY_SIZE(spec_order); i++) {
if (val & spec_order[i]) {
+ if (items >= items2) {
+ pr_err("SELinux: avtab: entry has too many items (%d/%d)\n",
+ items + 1, items2);
+ return -EINVAL;
+ }
key.specified = spec_order[i] | enabled;
datum.u.data = le32_to_cpu(buf32[items++]);
rc = insertf(a, &key, &datum, p);
@@ -444,9 +459,13 @@ int avtab_read_item(struct avtab *a, struct policy_file *fp, struct policydb *po
return -EINVAL;
}
- set = hweight16(key.specified & (AVTAB_XPERMS | AVTAB_TYPE | AVTAB_AV));
- if (!set || set > 1) {
- pr_err("SELinux: avtab: more than one specifier\n");
+ if (hweight16(key.specified & ~AVTAB_ENABLED) != 1) {
+ pr_err("SELinux: avtab: not exactly one specifier\n");
+ return -EINVAL;
+ }
+
+ if (key.specified & ~AVTAB_SPECIFIER_MASK) {
+ pr_err("SELinux: avtab: invalid specifier\n");
return -EINVAL;
}
@@ -471,6 +490,10 @@ int avtab_read_item(struct avtab *a, struct policy_file *fp, struct policydb *po
pr_err("SELinux: avtab: truncated entry\n");
return rc;
}
+ if (!avtab_is_valid_xperm_specified(xperms.specified))
+ pr_warn_once_policyload(pol,
+ "SELinux: avtab: unsupported xperm specifier %#x\n",
+ xperms.specified);
rc = next_entry(&xperms.driver, fp, sizeof(u8));
if (rc) {
pr_err("SELinux: avtab: truncated entry\n");
diff --git a/security/selinux/ss/avtab.h b/security/selinux/ss/avtab.h
index 850b3453f2598..1de4cce288a76 100644
--- a/security/selinux/ss/avtab.h
+++ b/security/selinux/ss/avtab.h
@@ -44,6 +44,7 @@ struct avtab_key {
AVTAB_XPERMS_DONTAUDIT)
#define AVTAB_ENABLED_OLD 0x80000000 /* reserved for used in cond_avtab */
#define AVTAB_ENABLED 0x8000 /* reserved for used in cond_avtab */
+#define AVTAB_SPECIFIER_MASK (AVTAB_AV | AVTAB_TYPE | AVTAB_XPERMS | AVTAB_ENABLED)
u16 specified; /* what field is specified */
};
@@ -68,6 +69,18 @@ struct avtab_extended_perms {
struct extended_perms_data perms;
};
+static inline bool avtab_is_valid_xperm_specified(u8 specified)
+{
+ switch (specified) {
+ case AVTAB_XPERMS_IOCTLFUNCTION:
+ case AVTAB_XPERMS_IOCTLDRIVER:
+ case AVTAB_XPERMS_NLMSG:
+ return true;
+ default:
+ return false;
+ }
+}
+
struct avtab_datum {
union {
u32 data; /* access vector or type value */
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 1bebfcb9c6a12..db30462ed6a32 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -199,19 +199,12 @@ int cond_index_bool(void *key, void *datum, void *datap)
return 0;
}
-static int bool_isvalid(struct cond_bool_datum *b)
-{
- if (!(b->state == 0 || b->state == 1))
- return 0;
- return 1;
-}
-
int cond_read_bool(struct policydb *p, struct symtab *s, struct policy_file *fp)
{
char *key = NULL;
struct cond_bool_datum *booldatum;
__le32 buf[3];
- u32 len;
+ u32 len, val;
int rc;
booldatum = kzalloc(sizeof(*booldatum), GFP_KERNEL);
@@ -223,11 +216,12 @@ int cond_read_bool(struct policydb *p, struct symtab *s, struct policy_file *fp)
goto err;
booldatum->value = le32_to_cpu(buf[0]);
- booldatum->state = le32_to_cpu(buf[1]);
+ val = le32_to_cpu(buf[1]);
rc = -EINVAL;
- if (!bool_isvalid(booldatum))
+ if (!val_is_boolean(val))
goto err;
+ booldatum->state = (int)val;
len = le32_to_cpu(buf[2]);
@@ -241,6 +235,7 @@ int cond_read_bool(struct policydb *p, struct symtab *s, struct policy_file *fp)
return 0;
err:
+ pr_err("SELinux: conditional: failed to read boolean\n");
cond_destroy_bool(key, booldatum, NULL);
return rc;
}
@@ -362,7 +357,8 @@ static int expr_node_isvalid(struct policydb *p, struct cond_expr_node *expr)
return 0;
}
- if (expr->boolean > p->p_bools.nprim) {
+ if (expr->expr_type == COND_BOOL &&
+ (expr->boolean == 0 || expr->boolean > p->p_bools.nprim)) {
pr_err("SELinux: conditional expressions uses unknown bool.\n");
return 0;
}
diff --git a/security/selinux/ss/constraint.h b/security/selinux/ss/constraint.h
index 203033cfad672..1d75a8a044df9 100644
--- a/security/selinux/ss/constraint.h
+++ b/security/selinux/ss/constraint.h
@@ -50,6 +50,7 @@ struct constraint_expr {
u32 op; /* operator */
struct ebitmap names; /* names */
+ /* internally unused, only forwarded via policydb_write() */
struct type_set *type_names;
struct constraint_expr *next; /* next expression */
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 4c3cc98f87752..b87a512446197 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -638,13 +638,11 @@ static int sens_index(void *key, void *datum, void *datap)
levdatum = datum;
p = datap;
- if (!levdatum->isalias) {
- if (!levdatum->level.sens ||
- levdatum->level.sens > p->p_levels.nprim)
- return -EINVAL;
+ if (!levdatum->level.sens || levdatum->level.sens > p->p_levels.nprim)
+ return -EINVAL;
+ if (!levdatum->isalias)
p->sym_val_to_name[SYM_LEVELS][levdatum->level.sens - 1] = key;
- }
return 0;
}
@@ -657,12 +655,11 @@ static int cat_index(void *key, void *datum, void *datap)
catdatum = datum;
p = datap;
- if (!catdatum->isalias) {
- if (!catdatum->value || catdatum->value > p->p_cats.nprim)
- return -EINVAL;
+ if (!catdatum->value || catdatum->value > p->p_cats.nprim)
+ return -EINVAL;
+ if (!catdatum->isalias)
p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
- }
return 0;
}
@@ -1160,6 +1157,9 @@ static int perm_read(struct policydb *p, struct symtab *s, struct policy_file *f
len = le32_to_cpu(buf[0]);
perdatum->value = le32_to_cpu(buf[1]);
+ rc = -EINVAL;
+ if (perdatum->value < 1 || perdatum->value > SEL_VEC_MAX)
+ goto bad;
rc = str_read(&key, GFP_KERNEL, fp, len);
if (rc)
@@ -1194,6 +1194,9 @@ static int common_read(struct policydb *p, struct symtab *s, struct policy_file
len = le32_to_cpu(buf[0]);
comdatum->value = le32_to_cpu(buf[1]);
nel = le32_to_cpu(buf[3]);
+ rc = -EINVAL;
+ if (nel > SEL_VEC_MAX)
+ goto bad;
rc = symtab_init(&comdatum->permissions, nel);
if (rc)
@@ -1345,7 +1348,7 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
char *key = NULL;
struct class_datum *cladatum;
__le32 buf[6];
- u32 i, len, len2, ncons, nel;
+ u32 i, len, len2, ncons, nel, val;
int rc;
cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
@@ -1358,8 +1361,16 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
len = le32_to_cpu(buf[0]);
len2 = le32_to_cpu(buf[1]);
- cladatum->value = le32_to_cpu(buf[2]);
nel = le32_to_cpu(buf[4]);
+ rc = -EINVAL;
+ if (nel > SEL_VEC_MAX)
+ goto bad;
+
+ val = le32_to_cpu(buf[2]);
+ rc = -EINVAL;
+ if (val > U16_MAX)
+ goto bad;
+ cladatum->value = val;
rc = symtab_init(&cladatum->permissions, nel);
if (rc)
@@ -1427,16 +1438,59 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
if (rc)
goto bad;
- cladatum->default_user = le32_to_cpu(buf[0]);
- cladatum->default_role = le32_to_cpu(buf[1]);
- cladatum->default_range = le32_to_cpu(buf[2]);
+ rc = -EINVAL;
+ val = le32_to_cpu(buf[0]);
+ switch (val) {
+ case 0:
+ case DEFAULT_SOURCE:
+ case DEFAULT_TARGET:
+ cladatum->default_user = val;
+ break;
+ default:
+ goto bad;
+ }
+ val = le32_to_cpu(buf[1]);
+ switch (val) {
+ case 0:
+ case DEFAULT_SOURCE:
+ case DEFAULT_TARGET:
+ cladatum->default_role = val;
+ break;
+ default:
+ goto bad;
+ }
+ val = le32_to_cpu(buf[2]);
+ switch (val) {
+ case 0:
+ case DEFAULT_SOURCE_LOW:
+ case DEFAULT_SOURCE_HIGH:
+ case DEFAULT_SOURCE_LOW_HIGH:
+ case DEFAULT_TARGET_LOW:
+ case DEFAULT_TARGET_HIGH:
+ case DEFAULT_TARGET_LOW_HIGH:
+ case DEFAULT_GLBLUB:
+ cladatum->default_range = val;
+ break;
+ default:
+ goto bad;
+ }
}
if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
rc = next_entry(buf, fp, sizeof(u32) * 1);
if (rc)
goto bad;
- cladatum->default_type = le32_to_cpu(buf[0]);
+ rc = -EINVAL;
+ val = le32_to_cpu(buf[0]);
+ switch (val) {
+ case 0:
+ case DEFAULT_TARGET:
+ case DEFAULT_SOURCE:
+ cladatum->default_type = val;
+ break;
+ default:
+ goto bad;
+ }
}
rc = symtab_insert(s, key, cladatum);
@@ -1446,6 +1500,8 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
return 0;
bad:
cls_destroy(key, cladatum, NULL);
+ if (rc)
+ pr_err("SELinux: invalid class\n");
return rc;
}
@@ -1637,7 +1693,7 @@ static int sens_read(struct policydb *p, struct symtab *s, struct policy_file *f
struct level_datum *levdatum;
int rc;
__le32 buf[2];
- u32 len;
+ u32 len, val;
levdatum = kzalloc(sizeof(*levdatum), GFP_KERNEL);
if (!levdatum)
@@ -1648,7 +1704,11 @@ static int sens_read(struct policydb *p, struct symtab *s, struct policy_file *f
goto bad;
len = le32_to_cpu(buf[0]);
- levdatum->isalias = le32_to_cpu(buf[1]);
+ val = le32_to_cpu(buf[1]);
+ rc = -EINVAL;
+ if (!val_is_boolean(val))
+ goto bad;
+ levdatum->isalias = val;
rc = str_read(&key, GFP_KERNEL, fp, len);
if (rc)
@@ -1664,6 +1724,8 @@ static int sens_read(struct policydb *p, struct symtab *s, struct policy_file *f
return 0;
bad:
sens_destroy(key, levdatum, NULL);
+ if (rc)
+ pr_err("SELinux: invalid sensitivity\n");
return rc;
}
@@ -1673,7 +1735,7 @@ static int cat_read(struct policydb *p, struct symtab *s, struct policy_file *fp
struct cat_datum *catdatum;
int rc;
__le32 buf[3];
- u32 len;
+ u32 len, val;
catdatum = kzalloc(sizeof(*catdatum), GFP_KERNEL);
if (!catdatum)
@@ -1685,7 +1747,11 @@ static int cat_read(struct policydb *p, struct symtab *s, struct policy_file *fp
len = le32_to_cpu(buf[0]);
catdatum->value = le32_to_cpu(buf[1]);
- catdatum->isalias = le32_to_cpu(buf[2]);
+ val = le32_to_cpu(buf[2]);
+ rc = -EINVAL;
+ if (!val_is_boolean(val))
+ goto bad;
+ catdatum->isalias = val;
rc = str_read(&key, GFP_KERNEL, fp, len);
if (rc)
@@ -1697,6 +1763,8 @@ static int cat_read(struct policydb *p, struct symtab *s, struct policy_file *fp
return 0;
bad:
cat_destroy(key, catdatum, NULL);
+ if (rc)
+ pr_err("SELinux: invalid category\n");
return rc;
}
@@ -1878,7 +1946,7 @@ static int range_read(struct policydb *p, struct policy_file *fp)
struct mls_range *r = NULL;
int rc;
__le32 buf[2];
- u32 i, nel;
+ u32 i, nel, val;
if (p->policyvers < POLICYDB_VERSION_MLS)
return 0;
@@ -1909,7 +1977,11 @@ static int range_read(struct policydb *p, struct policy_file *fp)
rc = next_entry(buf, fp, sizeof(u32));
if (rc)
goto out;
- rt->target_class = le32_to_cpu(buf[0]);
+ rc = -EINVAL;
+ val = le32_to_cpu(buf[0]);
+ if (val > U16_MAX)
+ goto out;
+ rt->target_class = val;
} else
rt->target_class = p->process_class;
@@ -1946,6 +2018,8 @@ static int range_read(struct policydb *p, struct policy_file *fp)
out:
kfree(rt);
kfree(r);
+ if (rc)
+ pr_err("SELinux: invalid range\n");
return rc;
}
@@ -1954,7 +2028,7 @@ static int filename_trans_read_helper_compat(struct policydb *p, struct policy_f
struct filename_trans_key key, *ft = NULL;
struct filename_trans_datum *last, *datum = NULL;
char *name = NULL;
- u32 len, stype, otype;
+ u32 len, stype, otype, val;
__le32 buf[4];
int rc;
@@ -1973,9 +2047,17 @@ static int filename_trans_read_helper_compat(struct policydb *p, struct policy_f
if (rc)
goto out;
+ rc = -EINVAL;
stype = le32_to_cpu(buf[0]);
+ if (!policydb_type_isvalid(p, stype))
+ goto out;
key.ttype = le32_to_cpu(buf[1]);
- key.tclass = le32_to_cpu(buf[2]);
+ if (!policydb_type_isvalid(p, key.ttype))
+ goto out;
+ val = le32_to_cpu(buf[2]);
+ if (val > U16_MAX || !policydb_class_isvalid(p, val))
+ goto out;
+ key.tclass = val;
key.name = name;
otype = le32_to_cpu(buf[3]);
@@ -2031,6 +2113,9 @@ static int filename_trans_read_helper_compat(struct policydb *p, struct policy_f
kfree(ft);
kfree(name);
kfree(datum);
+
+ if (rc)
+ pr_err("SELinux: invalid compat filename transition\n");
return rc;
}
@@ -2039,7 +2124,7 @@ static int filename_trans_read_helper(struct policydb *p, struct policy_file *fp
struct filename_trans_key *ft = NULL;
struct filename_trans_datum **dst, *datum, *first = NULL;
char *name = NULL;
- u32 len, ttype, ndatum, i;
+ u32 len, ttype, ndatum, i, val;
u16 tclass;
__le32 buf[3];
int rc;
@@ -2059,8 +2144,15 @@ static int filename_trans_read_helper(struct policydb *p, struct policy_file *fp
if (rc)
goto out;
+ rc = -EINVAL;
ttype = le32_to_cpu(buf[0]);
- tclass = le32_to_cpu(buf[1]);
+ if (!policydb_type_isvalid(p, ttype))
+ goto out;
+ val = le32_to_cpu(buf[1]);
+ rc = -EINVAL;
+ if (val > U16_MAX || !policydb_class_isvalid(p, val))
+ goto out;
+ tclass = val;
ndatum = le32_to_cpu(buf[2]);
if (ndatum == 0) {
@@ -2090,6 +2182,10 @@ static int filename_trans_read_helper(struct policydb *p, struct policy_file *fp
datum->otype = le32_to_cpu(buf[0]);
+ rc = -EINVAL;
+ if (!policydb_type_isvalid(p, datum->otype))
+ goto out;
+
dst = &datum->next;
}
@@ -2121,6 +2217,9 @@ static int filename_trans_read_helper(struct policydb *p, struct policy_file *fp
ebitmap_destroy(&datum->stypes);
kfree(datum);
}
+
+ if (rc)
+ pr_err("SELinux: invalid filename transition\n");
return rc;
}
@@ -2168,7 +2267,7 @@ static int filename_trans_read(struct policydb *p, struct policy_file *fp)
static int genfs_read(struct policydb *p, struct policy_file *fp)
{
int rc;
- u32 i, j, nel, nel2, len, len2;
+ u32 i, j, nel, nel2, len, len2, val;
__le32 buf[1];
struct ocontext *l, *c;
struct ocontext *newc = NULL;
@@ -2238,7 +2337,11 @@ static int genfs_read(struct policydb *p, struct policy_file *fp)
if (rc)
goto out;
- newc->v.sclass = le32_to_cpu(buf[0]);
+ rc = -EINVAL;
+ val = le32_to_cpu(buf[0]);
+ if (val > U16_MAX || (val != 0 && !policydb_class_isvalid(p, val)))
+ goto out;
+ newc->v.sclass = val;
rc = context_read_and_validate(&newc->context[0], p,
fp);
if (rc)
@@ -2275,6 +2378,9 @@ static int genfs_read(struct policydb *p, struct policy_file *fp)
}
ocontext_destroy(newc, OCON_FSUSE);
+ if (rc)
+ pr_err("SELinux: invalid genfs\n");
+
return rc;
}
@@ -2283,7 +2389,7 @@ static int ocontext_read(struct policydb *p,
{
int rc;
unsigned int i;
- u32 j, nel, len;
+ u32 j, nel, len, val;
__be64 prefixbuf[1];
__le32 buf[3];
struct ocontext *l, *c;
@@ -2347,11 +2453,25 @@ static int ocontext_read(struct policydb *p,
rc = next_entry(buf, fp, sizeof(u32) * 3);
if (rc)
goto out;
- c->u.port.protocol = le32_to_cpu(buf[0]);
- c->u.port.low_port = le32_to_cpu(buf[1]);
- c->u.port.high_port = le32_to_cpu(buf[2]);
- rc = context_read_and_validate(&c->context[0],
- p, fp);
+
+ rc = -EINVAL;
+ val = le32_to_cpu(buf[0]);
+ if (val > U8_MAX)
+ goto out;
+ c->u.port.protocol = val;
+ val = le32_to_cpu(buf[1]);
+ if (val > U16_MAX)
+ goto out;
+ c->u.port.low_port = val;
+ val = le32_to_cpu(buf[2]);
+ if (val > U16_MAX)
+ goto out;
+ c->u.port.high_port = val;
+ if (c->u.port.low_port == 0 ||
+ c->u.port.low_port > c->u.port.high_port)
+ goto out;
+
+ rc = context_read_and_validate(&c->context[0], p, fp);
if (rc)
goto out;
break;
@@ -2469,6 +2589,8 @@ static int ocontext_read(struct policydb *p,
}
rc = 0;
out:
+ if (rc)
+ pr_err("SELinux: invalid ocon\n");
return rc;
}
@@ -2483,7 +2605,7 @@ int policydb_read(struct policydb *p, struct policy_file *fp)
struct role_trans_datum *rtd = NULL;
int rc;
__le32 buf[4];
- u32 i, j, len, nprim, nel, perm;
+ u32 i, j, len, nprim, nel, perm, val;
char *policydb_str;
const struct policydb_compat_info *info;
@@ -2675,7 +2797,11 @@ int policydb_read(struct policydb *p, struct policy_file *fp)
rc = next_entry(buf, fp, sizeof(u32));
if (rc)
goto bad;
- rtk->tclass = le32_to_cpu(buf[0]);
+ rc = -EINVAL;
+ val = le32_to_cpu(buf[0]);
+ if (val > U16_MAX)
+ goto bad;
+ rtk->tclass = val;
} else
rtk->tclass = p->process_class;
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index a49275d1168d8..20b834581106a 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -74,7 +74,7 @@ struct class_datum {
/* Role attributes */
struct role_datum {
u32 value; /* internal role value */
- u32 bounds; /* boundary of role */
+ u32 bounds; /* boundary of role, 0 for none */
struct ebitmap dominates; /* set of roles dominated by this role */
struct ebitmap types; /* set of authorized types for role */
};
@@ -110,7 +110,8 @@ struct role_allow {
/* Type attributes */
struct type_datum {
u32 value; /* internal type value */
- u32 bounds; /* boundary of type */
+ u32 bounds; /* boundary of type, 0 for none */
+ /* internally unused, only forwarded via policydb_write() */
unsigned char primary; /* primary name? */
unsigned char attribute; /* attribute ?*/
};
@@ -118,7 +119,7 @@ struct type_datum {
/* User attributes */
struct user_datum {
u32 value; /* internal user value */
- u32 bounds; /* bounds of user */
+ u32 bounds; /* bounds of user, 0 for none */
struct ebitmap roles; /* set of authorized roles for user */
struct mls_range range; /* MLS range (min - max) for user */
struct mls_level dfltlevel; /* default login MLS level for user */
@@ -195,7 +196,7 @@ struct ocontext {
} ibendport;
} u;
union {
- u16 sclass; /* security class for genfs */
+ u16 sclass; /* security class for genfs (can be 0 for wildcard) */
u32 behavior; /* labeling behavior for fs_use */
} v;
struct context context[2]; /* security context(s) */
@@ -388,9 +389,23 @@ static inline char *sym_name(struct policydb *p, unsigned int sym_num,
return p->sym_val_to_name[sym_num][element_nr];
}
+static inline bool val_is_boolean(u32 value)
+{
+ return value == 0 || value == 1;
+}
+
extern int str_read(char **strp, gfp_t flags, struct policy_file *fp, u32 len);
extern u16 string_to_security_class(struct policydb *p, const char *name);
extern u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name);
+#define pr_warn_once_policyload(policy, fmt, ...) \
+ do { \
+ static const void *prev_policy__; \
+ if (prev_policy__ != policy) { \
+ pr_warn(fmt, ##__VA_ARGS__); \
+ prev_policy__ = policy; \
+ } \
+ } while (0)
+
#endif /* _SS_POLICYDB_H_ */
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index cbc101b095a30..fb150025359b0 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -446,8 +446,6 @@ static int dump_masked_av_helper(void *k, void *d, void *args)
struct perm_datum *pdatum = d;
char **permission_names = args;
- BUG_ON(pdatum->value < 1 || pdatum->value > 32);
-
permission_names[pdatum->value - 1] = (char *)k;
return 0;
@@ -466,7 +464,7 @@ static void security_dump_masked_av(struct policydb *policydb,
char *tclass_name;
char *scontext_name = NULL;
char *tcontext_name = NULL;
- char *permission_names[32];
+ char *permission_names[SEL_VEC_MAX];
int index;
u32 length;
bool need_comma = false;
@@ -507,7 +505,7 @@ static void security_dump_masked_av(struct policydb *policydb,
"scontext=%s tcontext=%s tclass=%s perms=",
reason, scontext_name, tcontext_name, tclass_name);
- for (index = 0; index < 32; index++) {
+ for (index = 0; index < SEL_VEC_MAX; index++) {
u32 mask = (1 << index);
if ((mask & permissions) == 0)
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 11/83] selinux: reject a permission value exceeding the class permission count
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (9 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 10/83] selinux: more strict policy parsing Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 12/83] selinux: require a classs permission values to cover its " Greg Kroah-Hartman
` (80 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Bryam Vargas, Stephen Smalley,
Paul Moore, Wentao Guan, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bryam Vargas <hexlabsecurity@proton.me>
[ Upstream commit d14b5d0e97fccd27974fedc03b903408872907fd ]
perm_read() bounds a permission value by SEL_VEC_MAX but never by the
nprim of the owning class or common, which is taken verbatim from the
policy image. security_get_permissions() then writes perms[value - 1]
into an nprim-sized kcalloc() array, so a class declaring fewer
permissions than its largest permission value drives an out-of-bounds
heap write. The top-level symbol tables are validated this way; the
nested per-class permission table is not.
Reject a permission whose value exceeds nprim, which is already set when
perm_read() runs. Well-formed policies are unaffected.
Cc: stable@vger.kernel.org
Fixes: 55fcf09b3fe4 ("selinux: add support for querying object classes and permissions from the running policy")
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
[PM: tweak comment for line length]
Signed-off-by: Paul Moore <paul@paul-moore.com>
(cherry picked from commit d14b5d0e97fccd27974fedc03b903408872907fd)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
security/selinux/ss/policydb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index b87a512446197..926dae3731a0d 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1160,6 +1160,9 @@ static int perm_read(struct policydb *p, struct symtab *s, struct policy_file *f
rc = -EINVAL;
if (perdatum->value < 1 || perdatum->value > SEL_VEC_MAX)
goto bad;
+ /* indexes an nprim-sized array in security_get_permissions() */
+ if (perdatum->value > s->nprim)
+ goto bad;
rc = str_read(&key, GFP_KERNEL, fp, len);
if (rc)
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 12/83] selinux: require a classs permission values to cover its permission count
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (10 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 11/83] selinux: reject a permission value exceeding the class permission count Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 13/83] ASoC: nau8821: Cancel delayed work on component remove Greg Kroah-Hartman
` (79 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Bryam Vargas, Stephen Smalley,
Paul Moore, Wentao Guan, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bryam Vargas <hexlabsecurity@proton.me>
[ Upstream commit b98a8ac50775540f3804397ed08f61ef9910bcab ]
security_get_permissions() sizes an array by the class's permissions.nprim
and fills it at value - 1, from the inherited common's permission table and
then the class's own. A value no permission defines leaves a NULL that
sel_make_perm_files() passes to d_alloc_name(), an oops inside
sel_write_load() that strands selinux_state.policy_mutex and leaves every
later load in uninterruptible sleep; two permissions sharing a value
overwrite the first kstrdup(). Bounding each value by nprim catches
neither, and neither would a count: the symbol table is keyed on the
permission name, so duplicates pass.
Track the values each permission table claims and require them to cover
exactly what its count declares, rejecting a count no value can reach.
Conforming policies are unaffected.
Cc: stable@vger.kernel.org
Fixes: 55fcf09b3fe4 ("selinux: add support for querying object classes and permissions from the running policy")
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
(cherry picked from commit b98a8ac50775540f3804397ed08f61ef9910bcab)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
security/selinux/ss/policydb.c | 51 ++++++++++++++++++++++++++++++----
1 file changed, 46 insertions(+), 5 deletions(-)
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 926dae3731a0d..483d7d54642a3 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1139,7 +1139,18 @@ int str_read(char **strp, gfp_t flags, struct policy_file *fp, u32 len)
return 0;
}
-static int perm_read(struct policydb *p, struct symtab *s, struct policy_file *fp)
+/*
+ * Bitmap of the permission values a symtab has claimed. Values are 1-based
+ * and bounded by SEL_VEC_MAX, the width of an access vector, so the whole set
+ * fits in a u32 and the callers reject an nprim past that width.
+ */
+static u32 perm_claimed_mask(u32 nprim)
+{
+ return nprim ? U32_MAX >> (SEL_VEC_MAX - nprim) : 0;
+}
+
+static int perm_read(struct policydb *p, struct symtab *s,
+ struct policy_file *fp, u32 *claimed)
{
char *key = NULL;
struct perm_datum *perdatum;
@@ -1163,6 +1174,10 @@ static int perm_read(struct policydb *p, struct symtab *s, struct policy_file *f
/* indexes an nprim-sized array in security_get_permissions() */
if (perdatum->value > s->nprim)
goto bad;
+ /* two permissions cannot share one slot of that array */
+ if (*claimed & (1U << (perdatum->value - 1)))
+ goto bad;
+ *claimed |= 1U << (perdatum->value - 1);
rc = str_read(&key, GFP_KERNEL, fp, len);
if (rc)
@@ -1183,7 +1198,7 @@ static int common_read(struct policydb *p, struct symtab *s, struct policy_file
char *key = NULL;
struct common_datum *comdatum;
__le32 buf[4];
- u32 i, len, nel;
+ u32 i, len, nel, claimed = 0;
int rc;
comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
@@ -1205,17 +1220,28 @@ static int common_read(struct policydb *p, struct symtab *s, struct policy_file
if (rc)
goto bad;
comdatum->permissions.nprim = le32_to_cpu(buf[2]);
+ /* no permission value can reach a slot past SEL_VEC_MAX */
+ rc = -EINVAL;
+ if (comdatum->permissions.nprim > SEL_VEC_MAX)
+ goto bad;
rc = str_read(&key, GFP_KERNEL, fp, len);
if (rc)
goto bad;
for (i = 0; i < nel; i++) {
- rc = perm_read(p, &comdatum->permissions, fp);
+ rc = perm_read(p, &comdatum->permissions, fp, &claimed);
if (rc)
goto bad;
}
+ rc = -EINVAL;
+ if (claimed != perm_claimed_mask(comdatum->permissions.nprim)) {
+ pr_err("SELinux: common %s does not define every permission it declares\n",
+ key);
+ goto bad;
+ }
+
hash_eval(&comdatum->permissions.table, "common_permissions", key);
rc = symtab_insert(s, key, comdatum);
@@ -1351,7 +1377,7 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
char *key = NULL;
struct class_datum *cladatum;
__le32 buf[6];
- u32 i, len, len2, ncons, nel, val;
+ u32 i, len, len2, ncons, nel, val, claimed = 0, inherited = 0;
int rc;
cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
@@ -1379,6 +1405,10 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
if (rc)
goto bad;
cladatum->permissions.nprim = le32_to_cpu(buf[3]);
+ /* no permission value can reach a slot past SEL_VEC_MAX */
+ rc = -EINVAL;
+ if (cladatum->permissions.nprim > SEL_VEC_MAX)
+ goto bad;
ncons = le32_to_cpu(buf[5]);
@@ -1413,11 +1443,22 @@ static int class_read(struct policydb *p, struct symtab *s, struct policy_file *
}
}
for (i = 0; i < nel; i++) {
- rc = perm_read(p, &cladatum->permissions, fp);
+ rc = perm_read(p, &cladatum->permissions, fp, &claimed);
if (rc)
goto bad;
}
+ /* the class's own permissions must claim the slots the common leaves */
+ if (cladatum->comdatum)
+ inherited = cladatum->comdatum->permissions.nprim;
+ rc = -EINVAL;
+ if (claimed != (perm_claimed_mask(cladatum->permissions.nprim) &
+ ~perm_claimed_mask(inherited))) {
+ pr_err("SELinux: class %s does not define every permission it declares\n",
+ key);
+ goto bad;
+ }
+
hash_eval(&cladatum->permissions.table, "class_permissions", key);
rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 13/83] ASoC: nau8821: Cancel delayed work on component remove
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (11 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 12/83] selinux: require a classs permission values to cover its " Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 14/83] bpf: Fix use-after-free in offloaded map/prog info fill Greg Kroah-Hartman
` (78 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Cristian Ciocaltea, Mark Brown,
Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
[ Upstream commit dbd3fd05cddfdeec1e49b0a66269881c09eebd17 ]
Attempting to unload the driver while a jack detection work is pending
would likely crash the kernel when it is eventually scheduled for
execution:
[ 1984.896308] BUG: unable to handle page fault for address: ffffffffc10c2a20
[...]
[ 1984.896388] Hardware name: Valve Jupiter/Jupiter, BIOS F7A0131 01/30/2024
[ 1984.896396] Workqueue: events nau8821_jdet_work [snd_soc_nau8821]
[ 1984.896414] RIP: 0010:__mutex_lock+0x9f/0x11d0
[...]
[ 1984.896504] Call Trace:
[ 1984.896511] <TASK>
[ 1984.896524] ? snd_soc_dapm_disable_pin+0x26/0x60 [snd_soc_core]
[ 1984.896572] ? snd_soc_dapm_disable_pin+0x26/0x60 [snd_soc_core]
[ 1984.896596] snd_soc_dapm_disable_pin+0x26/0x60 [snd_soc_core]
[ 1984.896622] nau8821_jdet_work+0xeb/0x1e0 [snd_soc_nau8821]
[ 1984.896636] process_one_work+0x211/0x590
[ 1984.896649] ? srso_return_thunk+0x5/0x5f
[ 1984.896670] worker_thread+0x1cd/0x3a0
Cancel unscheduled jdet_work or wait for its execution to finish before
the component driver gets removed.
Fixes: aab1ad11d69f ("ASoC: nau8821: new driver")
Fixes: ee70bacef1c6 ("ASoC: nau8821: Avoid unnecessary blocking in IRQ handler")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20251231-nau8821-cleanup-v1-2-6b0b76cbbb64@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/codecs/nau8821.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/sound/soc/codecs/nau8821.c b/sound/soc/codecs/nau8821.c
index dfb9630bffe29..8228cd396b9b3 100644
--- a/sound/soc/codecs/nau8821.c
+++ b/sound/soc/codecs/nau8821.c
@@ -1269,6 +1269,14 @@ static int nau8821_component_probe(struct snd_soc_component *component)
return 0;
}
+static void nau8821_component_remove(struct snd_soc_component *component)
+{
+ struct nau8821 *nau8821 = snd_soc_component_get_drvdata(component);
+
+ if (nau8821->jdet_active)
+ cancel_delayed_work_sync(&nau8821->jdet_work);
+};
+
/**
* nau8821_calc_fll_param - Calculate FLL parameters.
* @fll_in: external clock provided to codec.
@@ -1627,6 +1635,7 @@ static int __maybe_unused nau8821_resume(struct snd_soc_component *component)
static const struct snd_soc_component_driver nau8821_component_driver = {
.probe = nau8821_component_probe,
+ .remove = nau8821_component_remove,
.set_sysclk = nau8821_set_sysclk,
.set_pll = nau8821_set_fll,
.set_bias_level = nau8821_set_bias_level,
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 14/83] bpf: Fix use-after-free in offloaded map/prog info fill
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (12 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 13/83] ASoC: nau8821: Cancel delayed work on component remove Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 15/83] riscv: Fix register corruption from uninitialized cregs on error Greg Kroah-Hartman
` (77 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Yinhao Hu, Kaiyan Mei, Dongliang Mu,
Jiayuan Chen, Daniel Borkmann, Alexei Starovoitov, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiayuan Chen <jiayuan.chen@linux.dev>
[ Upstream commit a0c584fc18056709c8e047a82a6045d6c209f4ce ]
When querying info for an offloaded BPF map or program,
bpf_map_offload_info_fill_ns() and bpf_prog_offload_info_fill_ns()
obtain the network namespace with get_net(dev_net(offmap->netdev)).
However, the associated netdev's netns may be racing with teardown
during netns destruction. If the netns refcount has already reached 0,
get_net() performs a refcount_t increment on 0, triggering:
refcount_t: addition on 0; use-after-free.
Although rtnl_lock and bpf_devs_lock ensure the netdev pointer remains
valid, they cannot prevent the netns refcount from reaching zero.
Fix this by using maybe_get_net() instead of get_net(). maybe_get_net()
uses refcount_inc_not_zero() and returns NULL if the refcount is already
zero, which causes ns_get_path_cb() to fail and the caller to return
-ENOENT -- the correct behavior when the netns is being destroyed.
Fixes: 675fc275a3a2d ("bpf: offload: report device information for offloaded programs")
Fixes: 52775b33bb507 ("bpf: offload: report device information about offloaded maps")
Reported-by: Yinhao Hu <dddddd@hust.edu.cn>
Reported-by: Kaiyan Mei <M202472210@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Closes: https://lore.kernel.org/bpf/f0aa3678-79c9-47ae-9e8c-02a3d1df160a@hust.edu.cn/
Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20260409023733.168050-1-jiayuan.chen@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/bpf/offload.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index 42ae8d595c2c2..a9a036547c960 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -445,9 +445,8 @@ static struct ns_common *bpf_prog_offload_info_fill_ns(void *private_data)
if (aux->offload) {
args->info->ifindex = aux->offload->netdev->ifindex;
- net = dev_net(aux->offload->netdev);
- get_net(net);
- ns = &net->ns;
+ net = maybe_get_net(dev_net(aux->offload->netdev));
+ ns = net ? &net->ns : NULL;
} else {
args->info->ifindex = 0;
ns = NULL;
@@ -657,9 +656,8 @@ static struct ns_common *bpf_map_offload_info_fill_ns(void *private_data)
if (args->offmap->netdev) {
args->info->ifindex = args->offmap->netdev->ifindex;
- net = dev_net(args->offmap->netdev);
- get_net(net);
- ns = &net->ns;
+ net = maybe_get_net(dev_net(args->offmap->netdev));
+ ns = net ? &net->ns : NULL;
} else {
args->info->ifindex = 0;
ns = NULL;
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 15/83] riscv: Fix register corruption from uninitialized cregs on error
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (13 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 14/83] bpf: Fix use-after-free in offloaded map/prog info fill Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 16/83] ASoC: nau8821: Cancel pending work before suspend Greg Kroah-Hartman
` (76 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Michael Neuling, Paul Walmsley,
Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Neuling <mikey@neuling.org>
[ Upstream commit 6ebcbb53fc9bc30843054ed99fd60b8e542628f4 ]
compat_riscv_gpr_set() calls cregs_to_regs() unconditionally, even when
user_regset_copyin() fails. Since cregs is an uninitialized stack
variable, a copyin failure causes uninitialized stack data to be written
into the target task's pt_regs, corrupting its register state and
potentially leaking kernel stack contents.
compat_restore_sigcontext() has the same issue: it calls cregs_to_regs()
even when __copy_from_user() fails, leading to the same corruption of
the signal-returning task's register state on error.
Only call cregs_to_regs() when the user copy succeeds.
Fixes: 4608c159594f ("riscv: compat: ptrace: Add compat_arch_ptrace implement")
Fixes: 7383ee05314b ("riscv: compat: signal: Add rt_frame implementation")
Signed-off-by: Michael Neuling <mikey@neuling.org>
Assisted-by: Cursor:claude-4.6-opus-high-thinking
Link: https://patch.msgid.link/20260501062320.2339562-1-mikey@neuling.org
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/riscv/kernel/compat_signal.c | 2 ++
arch/riscv/kernel/ptrace.c | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/kernel/compat_signal.c b/arch/riscv/kernel/compat_signal.c
index 6ec4e34255a9a..cf3eb33a11e46 100644
--- a/arch/riscv/kernel/compat_signal.c
+++ b/arch/riscv/kernel/compat_signal.c
@@ -107,6 +107,8 @@ static long compat_restore_sigcontext(struct pt_regs *regs,
/* sc_regs is structured the same as the start of pt_regs */
err = __copy_from_user(&cregs, &sc->sc_regs, sizeof(sc->sc_regs));
+ if (unlikely(err))
+ return err;
cregs_to_regs(&cregs, regs);
diff --git a/arch/riscv/kernel/ptrace.c b/arch/riscv/kernel/ptrace.c
index 8e86305831ea4..32cd48a4cebb8 100644
--- a/arch/riscv/kernel/ptrace.c
+++ b/arch/riscv/kernel/ptrace.c
@@ -372,8 +372,8 @@ static int compat_riscv_gpr_set(struct task_struct *target,
struct compat_user_regs_struct cregs;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &cregs, 0, -1);
-
- cregs_to_regs(&cregs, task_pt_regs(target));
+ if (!ret)
+ cregs_to_regs(&cregs, task_pt_regs(target));
return ret;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 16/83] ASoC: nau8821: Cancel pending work before suspend
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (14 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 15/83] riscv: Fix register corruption from uninitialized cregs on error Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 17/83] selinux: switch two allocations to use kzalloc_objs() Greg Kroah-Hartman
` (75 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Cristian Ciocaltea, Mark Brown,
Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
[ Upstream commit 7786b10688ac0ebeaff655923cbb2c7d34a98995 ]
A jack detection work that is unscheduled or in progress while executing
the suspend handler could trigger a race condition.
Ensure state consistency by cancelling any pending work or wait for its
execution to complete before processing the suspend. Since driver
(re)enables both insert and eject interrupts on resume, there is no risk
to miss the related jack events. Therefore, flush_delayed_work() is not
required here.
Fixes: aab1ad11d69f ("ASoC: nau8821: new driver")
Fixes: ee70bacef1c6 ("ASoC: nau8821: Avoid unnecessary blocking in IRQ handler")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20251231-nau8821-cleanup-v1-3-6b0b76cbbb64@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/codecs/nau8821.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/soc/codecs/nau8821.c b/sound/soc/codecs/nau8821.c
index 8228cd396b9b3..53a38eb4eb0e1 100644
--- a/sound/soc/codecs/nau8821.c
+++ b/sound/soc/codecs/nau8821.c
@@ -1611,6 +1611,10 @@ static int __maybe_unused nau8821_suspend(struct snd_soc_component *component)
if (nau8821->irq)
disable_irq(nau8821->irq);
+
+ if (nau8821->jdet_active)
+ cancel_delayed_work_sync(&nau8821->jdet_work);
+
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
/* Power down codec power; don't support button wakeup */
snd_soc_component_disable_pin(component, "MICBIAS");
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 17/83] selinux: switch two allocations to use kzalloc_objs()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (15 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 16/83] ASoC: nau8821: Cancel pending work before suspend Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 18/83] veth: fix OOB txq access in veth_poll() with asymmetric queue counts Greg Kroah-Hartman
` (74 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Stephen Smalley, Paul Moore,
Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Stephen Smalley <stephen.smalley.work@gmail.com>
[ Upstream commit cf6a513f1937581eb012a217b29817e025a1a0ef ]
These were the only two allocations in the policy loading logic
that were not already using kzalloc_objs() for the policy
data structures. Fix these to be consistent with the rest and
to protect against ill-formed policy.
Signed-off-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
security/selinux/ss/conditional.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index db30462ed6a32..280dc57df8d39 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -165,7 +165,7 @@ void cond_policydb_destroy(struct policydb *p)
int cond_init_bool_indexes(struct policydb *p)
{
kfree(p->bool_val_to_struct);
- p->bool_val_to_struct = kmalloc_array(
+ p->bool_val_to_struct = kcalloc(
p->p_bools.nprim, sizeof(*p->bool_val_to_struct), GFP_KERNEL);
if (!p->bool_val_to_struct)
return -ENOMEM;
@@ -706,9 +706,8 @@ static int duplicate_policydb_bools(struct policydb *newdb,
struct cond_bool_datum **cond_bool_array;
int rc;
- cond_bool_array = kmalloc_array(orig->p_bools.nprim,
- sizeof(*orig->bool_val_to_struct),
- GFP_KERNEL);
+ cond_bool_array = kcalloc(orig->p_bools.nprim,
+ sizeof(*orig->bool_val_to_struct), GFP_KERNEL);
if (!cond_bool_array)
return -ENOMEM;
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 18/83] veth: fix OOB txq access in veth_poll() with asymmetric queue counts
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (16 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 17/83] selinux: switch two allocations to use kzalloc_objs() Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 19/83] powerpc/hv-gpci: fix preempt count leak in sysfs show paths Greg Kroah-Hartman
` (73 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sashiko, Jesper Dangaard Brouer,
Paolo Abeni, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jesper Dangaard Brouer <hawk@kernel.org>
[ Upstream commit 08f566e8f83bb70f04ad5aba5be352c490a01c8a ]
XDP redirect into a veth device (via bpf_redirect()) calls
veth_xdp_xmit(), which enqueues frames into the peer's ptr_ring using
smp_processor_id() % peer->real_num_rx_queues
as the ring index. With an asymmetric veth pair where the peer has
fewer TX queues than RX queues, that index can exceed
peer->real_num_tx_queues.
veth_poll() then resolves peer_txq for the ring via:
peer_txq = peer_dev ? netdev_get_tx_queue(peer_dev, queue_idx) : NULL;
where queue_idx = rq->xdp_rxq.queue_index. When queue_idx exceeds
peer_dev->real_num_tx_queues this is an out-of-bounds (OOB) access
into the peer's netdev_queue array, triggering DEBUG_NET_WARN_ON_ONCE
in netdev_get_tx_queue().
The normal ndo_start_xmit path is not affected: the stack clamps
skb->queue_mapping via netdev_cap_txqueue() before invoking
ndo_start_xmit, so rxq in veth_xmit() never exceeds real_num_tx_queues.
Fix veth_poll() by clamping: only dereference peer_txq when queue_idx is
within bounds, otherwise set it to NULL. The out-of-range rings are fed
exclusively via XDP redirect (veth_xdp_xmit), never via ndo_start_xmit
(veth_xmit), so the peer txq was never stopped and there is nothing to
wake; NULL is the correct fallback.
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/all/20260502071828.616C3C19425@smtp.kernel.org/
Fixes: dc82a33297fc ("veth: apply qdisc backpressure on full ptr_ring to reduce TX drops")
Signed-off-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://patch.msgid.link/20260505132159.241305-2-hawk@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/veth.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index df276a646c451..56519b646cacd 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -978,7 +978,8 @@ static int veth_poll(struct napi_struct *napi, int budget)
/* NAPI functions as RCU section */
peer_dev = rcu_dereference_check(priv->peer, rcu_read_lock_bh_held());
- peer_txq = peer_dev ? netdev_get_tx_queue(peer_dev, queue_idx) : NULL;
+ peer_txq = (peer_dev && queue_idx < peer_dev->real_num_tx_queues) ?
+ netdev_get_tx_queue(peer_dev, queue_idx) : NULL;
xdp_set_return_frame_no_direct();
done = veth_xdp_rcv(rq, budget, &bq, &stats);
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 19/83] powerpc/hv-gpci: fix preempt count leak in sysfs show paths
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (17 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 18/83] veth: fix OOB txq access in veth_poll() with asymmetric queue counts Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 20/83] io_uring/futex: only mark private futex waits as inflight Greg Kroah-Hartman
` (72 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Aboorva Devarajan,
Ritesh Harjani (IBM), Madhavan Srinivasan, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aboorva Devarajan <aboorvad@linux.ibm.com>
[ Upstream commit dbc30a57bd8e026995e9fa8e8c31cffd18542c01 ]
Four sysfs show() callbacks in hv-gpci take get_cpu_var(hv_gpci_reqb)
(which calls preempt_disable()) but only call the matching put_cpu_var()
on the error path under the 'out:' label. Every successful read leaks
one preempt_disable():
processor_bus_topology_show()
processor_config_show()
affinity_domain_via_virtual_processor_show()
affinity_domain_via_domain_show()
(affinity_domain_via_partition_show() was already correct.)
On a CONFIG_PREEMPT=y kernel, repeated reads raise preempt_count and
eventually return to userspace with preemption still disabled. The
next user-mode page fault then hits faulthandler_disabled() == 1,
gets forced to SIGSEGV, and the resulting coredump trips
'BUG: scheduling while atomic' in call_usermodehelper_exec ->
wait_for_completion_state -> schedule:
BUG: scheduling while atomic: <task>/<pid>/0x00000004
...
__schedule_bug+0x6c/0x90
__schedule+0x58c/0x13a0
schedule+0x48/0x1a0
schedule_timeout+0x104/0x170
wait_for_completion_state+0x16c/0x330
call_usermodehelper_exec+0x254/0x2d0
vfs_coredump+0x1050/0x2590
get_signal+0xb9c/0xc80
do_notify_resume+0xf8/0x470
Add an out_success label that calls put_cpu_var() before returning
the byte count, mirroring affinity_domain_via_partition_show().
Fixes: 71f1c39647d8 ("powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor bus topology information")
Fixes: 1a160c2a13c6 ("powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor config information")
Fixes: 71a7ccb478fc ("powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via virtual processor information")
Fixes: a69a57cac1ec ("powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via domain information")
Signed-off-by: Aboorva Devarajan <aboorvad@linux.ibm.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260508041256.3447113-1-aboorvad@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/perf/hv-gpci.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c
index 241551d1282f8..0ec0bd3110652 100644
--- a/arch/powerpc/perf/hv-gpci.c
+++ b/arch/powerpc/perf/hv-gpci.c
@@ -210,7 +210,7 @@ static ssize_t processor_bus_topology_show(struct device *dev, struct device_att
0, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
@@ -244,12 +244,14 @@ static ssize_t processor_bus_topology_show(struct device *dev, struct device_att
starting_index, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
}
+out_success:
+ put_cpu_var(hv_gpci_reqb);
return n;
out:
@@ -278,7 +280,7 @@ static ssize_t processor_config_show(struct device *dev, struct device_attribute
0, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
@@ -312,12 +314,14 @@ static ssize_t processor_config_show(struct device *dev, struct device_attribute
starting_index, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
}
+out_success:
+ put_cpu_var(hv_gpci_reqb);
return n;
out:
@@ -346,7 +350,7 @@ static ssize_t affinity_domain_via_virtual_processor_show(struct device *dev,
0, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
@@ -382,12 +386,14 @@ static ssize_t affinity_domain_via_virtual_processor_show(struct device *dev,
starting_index, secondary_index, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
}
+out_success:
+ put_cpu_var(hv_gpci_reqb);
return n;
out:
@@ -416,7 +422,7 @@ static ssize_t affinity_domain_via_domain_show(struct device *dev, struct device
0, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
@@ -448,12 +454,14 @@ static ssize_t affinity_domain_via_domain_show(struct device *dev, struct device
starting_index, 0, buf, &n, arg);
if (!ret)
- return n;
+ goto out_success;
if (ret != H_PARAMETER)
goto out;
}
+out_success:
+ put_cpu_var(hv_gpci_reqb);
return n;
out:
--
2.53.0
^ permalink raw reply related [flat|nested] 93+ messages in thread* [PATCH 6.18 20/83] io_uring/futex: only mark private futex waits as inflight
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (18 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 19/83] powerpc/hv-gpci: fix preempt count leak in sysfs show paths Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 21/83] io_uring: simplify IORING_SETUP_DEFER_TASKRUN && !SQPOLL check Greg Kroah-Hartman
` (71 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jens Axboe, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jens Axboe <axboe@kernel.dk>
commit 4d327bbd1cd2485783553b6b2b401aa475f90dd0 upstream.
Inflight tracking of futex wait requests exists to ensure that do_exit()
-> io_uring_files_cancel() cancels them before the mm goes away, as a
private futex wait depends on the mm private futex hash staying alive
for the duration of the request.
Shared futexes have no such dependency. A FLAGS_SHARED request always
resolves to either an inode based key or an mm-shared key, both of which
fail futex_key_is_private() and hence always hash into the global futex
hash, whose lifetime isn't tied to the mm.
Only mark vectored futex waits as inflight if the futex is private.
Cc: stable@vger.kernel.org
Fixes: 079afb081c42 ("io_uring/futex: mark wait requests as inflight")
Link: https://lore.kernel.org/io-uring/CANGjgdn=R_qyUdE=j9za+vkmqcxacbP-84OHXF4nZ4ho9qRyVg@mail.gmail.com/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[ kept 6.18's `struct futex_vector *futexv` declaration and changed `ifd->futexv[i].w.flags` to `futexv[i].w.flags` since `struct io_futexv_data` is absent, retaining the `iof->futexv_owned = 0;` init ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
io_uring/futex.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
--- a/io_uring/futex.c
+++ b/io_uring/futex.c
@@ -149,14 +149,16 @@ int io_futex_prep(struct io_kiocb *req,
int io_futex_wait_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
+ struct io_futex *iof = io_kiocb_to_cmd(req, struct io_futex);
int ret;
ret = io_futex_prep(req, sqe);
if (unlikely(ret))
return ret;
- /* Mark as inflight, so file exit cancelation will find it */
- io_req_track_inflight(req);
+ /* inflight tracking only needed for mm private hash */
+ if (!(iof->futex_flags & FLAGS_SHARED))
+ io_req_track_inflight(req);
return 0;
}
@@ -179,6 +181,7 @@ int io_futexv_prep(struct io_kiocb *req,
{
struct io_futex *iof = io_kiocb_to_cmd(req, struct io_futex);
struct futex_vector *futexv;
+ unsigned int i;
int ret;
/* No flags or mask supported for waitv */
@@ -202,8 +205,14 @@ int io_futexv_prep(struct io_kiocb *req,
return ret;
}
- /* Mark as inflight, so file exit cancelation will find it */
- io_req_track_inflight(req);
+ /* inflight tracking only needed for mm private hash */
+ for (i = 0; i < iof->futex_nr; i++) {
+ if (!(futexv[i].w.flags & FLAGS_SHARED)) {
+ io_req_track_inflight(req);
+ break;
+ }
+ }
+
iof->futexv_owned = 0;
iof->futexv_unqueued = 0;
req->flags |= REQ_F_ASYNC_DATA;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 21/83] io_uring: simplify IORING_SETUP_DEFER_TASKRUN && !SQPOLL check
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (19 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 20/83] io_uring/futex: only mark private futex waits as inflight Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 22/83] io_uring/rsrc: improve regbuf iov validation Greg Kroah-Hartman
` (70 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Caleb Sander Mateos, Jens Axboe,
Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Caleb Sander Mateos <csander@purestorage.com>
[ Upstream commit 7cb3a68376da0bc0afab8157223cb479c97de9ff ]
io_uring_sanitise_params() already rejects flags that include both
IORING_SETUP_SQPOLL and IORING_SETUP_DEFER_TASKRUN. So it's unnecessary
to check IORING_SETUP_SQPOLL in io_uring_create() when
IORING_SETUP_DEFER_TASKRUN has already been checked. Drop the
!(ctx->flags & IORING_SETUP_SQPOLL) check for the task_complete case.
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: cd305ee3633a ("io_uring: defer eventfd signaling when queued from a wakeup handler")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
io_uring/io_uring.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3867,8 +3867,7 @@ static __cold int io_uring_create(unsign
static_branch_deferred_inc(&io_key_has_sqarray);
if ((ctx->flags & IORING_SETUP_DEFER_TASKRUN) &&
- !(ctx->flags & IORING_SETUP_IOPOLL) &&
- !(ctx->flags & IORING_SETUP_SQPOLL))
+ !(ctx->flags & IORING_SETUP_IOPOLL))
ctx->task_complete = true;
if (ctx->task_complete || (ctx->flags & IORING_SETUP_IOPOLL))
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 22/83] io_uring/rsrc: improve regbuf iov validation
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (20 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 21/83] io_uring: simplify IORING_SETUP_DEFER_TASKRUN && !SQPOLL check Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:33 ` [PATCH 6.18 23/83] io_uring: defer eventfd signaling when queued from a wakeup handler Greg Kroah-Hartman
` (69 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Pavel Begunkov, Jens Axboe,
Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pavel Begunkov <asml.silence@gmail.com>
[ Upstream commit 2e02f9efdbc6c73544e315b7eb85e55a59776b6f ]
Deduplicate io_buffer_validate() calls by moving the checks into
io_sqe_buffer_register(). Now we also don't need special handling in
io_buffer_validate() passing through buffer removal requests. I also
was using it as a cleanup before some other changes.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: cd305ee3633a ("io_uring: defer eventfd signaling when queued from a wakeup handler")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
io_uring/rsrc.c | 31 ++++++++++---------------------
1 file changed, 10 insertions(+), 21 deletions(-)
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -94,20 +94,6 @@ int io_validate_user_buf_range(u64 uaddr
return 0;
}
-static int io_buffer_validate(struct iovec *iov)
-{
- /*
- * Don't impose further limits on the size and buffer
- * constraints here, we'll -EINVAL later when IO is
- * submitted if they are wrong.
- */
- if (!iov->iov_base)
- return iov->iov_len ? -EFAULT : 0;
-
- return io_validate_user_buf_range((unsigned long)iov->iov_base,
- iov->iov_len);
-}
-
static void io_release_ubuf(void *priv)
{
struct io_mapped_ubuf *imu = priv;
@@ -317,9 +303,6 @@ static int __io_sqe_buffers_update(struc
err = -EFAULT;
break;
}
- err = io_buffer_validate(iov);
- if (err)
- break;
node = io_sqe_buffer_register(ctx, iov, &last_hpage);
if (IS_ERR(node)) {
err = PTR_ERR(node);
@@ -788,8 +771,17 @@ static struct io_rsrc_node *io_sqe_buffe
struct io_imu_folio_data data;
bool coalesced = false;
- if (!iov->iov_base)
+ if (!iov->iov_base) {
+ if (iov->iov_len)
+ return ERR_PTR(-EFAULT);
+ /* remove the buffer without installing a new one */
return NULL;
+ }
+
+ ret = io_validate_user_buf_range((unsigned long)iov->iov_base,
+ iov->iov_len);
+ if (ret)
+ return ERR_PTR(ret);
node = io_rsrc_node_alloc(ctx, IORING_RSRC_BUFFER);
if (!node)
@@ -895,9 +887,6 @@ int io_sqe_buffers_register(struct io_ri
ret = PTR_ERR(iov);
break;
}
- ret = io_buffer_validate(iov);
- if (ret)
- break;
if (ctx->compat)
arg += sizeof(struct compat_iovec);
else
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 23/83] io_uring: defer eventfd signaling when queued from a wakeup handler
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (21 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 22/83] io_uring/rsrc: improve regbuf iov validation Greg Kroah-Hartman
@ 2026-08-31 13:33 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 24/83] HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event() Greg Kroah-Hartman
` (68 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:33 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jens Axboe, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jens Axboe <axboe@kernel.dk>
[ Upstream commit cd305ee3633a45fcf5f3a5d83f99f3cb77d87b6e ]
io_req_local_work_add() signals the CQ ring eventfd inline when it is the
one to push the first entry onto ->work_list. For DEFER_TASKRUN rings that
add is frequently done from a waitqueue wakeup handler, where an
arbitrary waitqueue lock is held.
eventfd_signal_mask() only refuses to recurse when current->in_eventfd
is set, but that bit is set by eventfd_signal_mask() itself. If the wake
chain starts somewhere else, signal goes out inline and can feed back
into epoll.
Add IOU_F_TWQ_IN_WAKE, set it on the task_work add done from the three
waitqueue callbacks, and use it to force io_eventfd_signal() down the
existing call_rcu_hurry() deferral instead of signaling inline.
Fixes: 21a091b970cd ("io_uring: signal registered eventfd to process deferred task work")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20260813133843.2933127-1-4ncienth@gmail.com/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
[ Relocated the `io_req_local_work_add()` hunk into io_uring.c and kept 6.18's `ctx->has_evfd` and open-coded `io_pollfree_wake()` context due to missing tw.c split and `io_poll_remove_waitq()`. ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/io_uring_types.h | 8 ++++++++
io_uring/eventfd.c | 8 ++++----
io_uring/eventfd.h | 2 +-
io_uring/futex.c | 4 ++--
io_uring/io_uring.c | 4 ++--
io_uring/poll.c | 23 ++++++++++++-----------
io_uring/waitid.c | 2 +-
7 files changed, 30 insertions(+), 21 deletions(-)
--- a/include/linux/io_uring_types.h
+++ b/include/linux/io_uring_types.h
@@ -17,6 +17,14 @@ enum {
* It's also ignored unless IORING_SETUP_DEFER_TASKRUN is set.
*/
IOU_F_TWQ_LAZY_WAKE = 1,
+
+ /*
+ * Set when task_work is queued from a waitqueue wakeup handler, where
+ * an arbitrary provider waitqueue lock is held. Signaling the CQ ring
+ * eventfd inline from there can recurse back into that lock through
+ * epoll, so the eventfd signal must be deferred.
+ */
+ IOU_F_TWQ_IN_WAKE = 2,
};
enum io_uring_cmd_flags {
--- a/io_uring/eventfd.c
+++ b/io_uring/eventfd.c
@@ -50,9 +50,9 @@ static void io_eventfd_do_signal(struct
/*
* Returns true if the caller should put the ev_fd reference, false if not.
*/
-static bool __io_eventfd_signal(struct io_ev_fd *ev_fd)
+static bool __io_eventfd_signal(struct io_ev_fd *ev_fd, bool defer)
{
- if (eventfd_signal_allowed()) {
+ if (!defer && eventfd_signal_allowed()) {
eventfd_signal_mask(ev_fd->cq_ev_fd, EPOLL_URING_WAKE);
return true;
}
@@ -72,7 +72,7 @@ static bool io_eventfd_trigger(struct io
return !ev_fd->eventfd_async || io_wq_current_is_worker();
}
-void io_eventfd_signal(struct io_ring_ctx *ctx, bool cqe_event)
+void io_eventfd_signal(struct io_ring_ctx *ctx, bool cqe_event, bool defer)
{
bool skip = false;
struct io_ev_fd *ev_fd;
@@ -112,7 +112,7 @@ void io_eventfd_signal(struct io_ring_ct
spin_unlock(&ctx->completion_lock);
}
- if (skip || __io_eventfd_signal(ev_fd))
+ if (skip || __io_eventfd_signal(ev_fd, defer))
io_eventfd_put(ev_fd);
}
--- a/io_uring/eventfd.h
+++ b/io_uring/eventfd.h
@@ -4,4 +4,4 @@ int io_eventfd_register(struct io_ring_c
unsigned int eventfd_async);
int io_eventfd_unregister(struct io_ring_ctx *ctx);
-void io_eventfd_signal(struct io_ring_ctx *ctx, bool cqe_event);
+void io_eventfd_signal(struct io_ring_ctx *ctx, bool cqe_event, bool defer);
--- a/io_uring/futex.c
+++ b/io_uring/futex.c
@@ -174,7 +174,7 @@ static void io_futex_wakev_fn(struct wak
io_req_set_res(req, 0, 0);
req->io_task_work.func = io_futexv_complete;
- io_req_task_work_add(req);
+ __io_req_task_work_add(req, IOU_F_TWQ_IN_WAKE);
}
int io_futexv_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
@@ -230,7 +230,7 @@ static void io_futex_wake_fn(struct wake
io_req_set_res(req, 0, 0);
req->io_task_work.func = io_futex_complete;
- io_req_task_work_add(req);
+ __io_req_task_work_add(req, IOU_F_TWQ_IN_WAKE);
}
int io_futexv_wait(struct io_kiocb *req, unsigned int issue_flags)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -578,7 +578,7 @@ void __io_commit_cqring_flush(struct io_
if (ctx->off_timeout_used)
io_flush_timeouts(ctx);
if (ctx->has_evfd)
- io_eventfd_signal(ctx, true);
+ io_eventfd_signal(ctx, true, false);
}
static inline void __io_cq_lock(struct io_ring_ctx *ctx)
@@ -1312,7 +1312,7 @@ static void io_req_local_work_add(struct
if (!head) {
io_ctx_mark_taskrun(ctx);
if (ctx->has_evfd)
- io_eventfd_signal(ctx, false);
+ io_eventfd_signal(ctx, false, flags & IOU_F_TWQ_IN_WAKE);
}
nr_wait = atomic_read(&ctx->cq_wait_nr);
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -190,9 +190,9 @@ enum {
IOU_POLL_REQUEUE = 4,
};
-static void __io_poll_execute(struct io_kiocb *req, int mask)
+static void __io_poll_execute(struct io_kiocb *req, int mask, unsigned tw_flags)
{
- unsigned flags = 0;
+ unsigned flags = tw_flags;
io_req_set_res(req, mask, 0);
req->io_task_work.func = io_poll_task_func;
@@ -200,14 +200,15 @@ static void __io_poll_execute(struct io_
trace_io_uring_task_add(req, mask);
if (!(req->flags & REQ_F_POLL_NO_LAZY))
- flags = IOU_F_TWQ_LAZY_WAKE;
+ flags |= IOU_F_TWQ_LAZY_WAKE;
__io_req_task_work_add(req, flags);
}
-static inline void io_poll_execute(struct io_kiocb *req, int res)
+static inline void io_poll_execute(struct io_kiocb *req, int res,
+ unsigned tw_flags)
{
if (io_poll_get_ownership(req))
- __io_poll_execute(req, res);
+ __io_poll_execute(req, res, tw_flags);
}
/*
@@ -323,7 +324,7 @@ void io_poll_task_func(struct io_kiocb *
if (ret == IOU_POLL_NO_ACTION) {
return;
} else if (ret == IOU_POLL_REQUEUE) {
- __io_poll_execute(req, 0);
+ __io_poll_execute(req, 0, 0);
return;
}
io_poll_remove_entries(req);
@@ -362,7 +363,7 @@ static void io_poll_cancel_req(struct io
{
io_poll_mark_cancelled(req);
/* kick tw, which should complete the request */
- io_poll_execute(req, 0);
+ io_poll_execute(req, 0, 0);
}
#define IO_ASYNC_POLL_COMMON (EPOLLONESHOT | EPOLLPRI)
@@ -371,7 +372,7 @@ static __cold int io_pollfree_wake(struc
{
io_poll_mark_cancelled(req);
/* we have to kick tw in case it's not already */
- io_poll_execute(req, 0);
+ io_poll_execute(req, 0, IOU_F_TWQ_IN_WAKE);
/*
* If the waitqueue is being freed early but someone is already
@@ -426,7 +427,7 @@ static int io_poll_wake(struct wait_queu
else
req->flags &= ~REQ_F_SINGLE_POLL;
}
- __io_poll_execute(req, mask);
+ __io_poll_execute(req, mask, IOU_F_TWQ_IN_WAKE);
}
return 1;
}
@@ -614,7 +615,7 @@ static int __io_arm_poll_handler(struct
if (mask && (poll->events & EPOLLET) &&
io_poll_can_finish_inline(req, ipt)) {
- __io_poll_execute(req, mask);
+ __io_poll_execute(req, mask, 0);
return 0;
}
io_napi_add(req);
@@ -625,7 +626,7 @@ static int __io_arm_poll_handler(struct
* poll was waken up, queue up a tw, it'll deal with it.
*/
if (atomic_cmpxchg(&req->poll_refs, 1, 0) != 1)
- __io_poll_execute(req, 0);
+ __io_poll_execute(req, 0, 0);
}
return 0;
}
--- a/io_uring/waitid.c
+++ b/io_uring/waitid.c
@@ -237,7 +237,7 @@ static int io_waitid_wait(struct wait_qu
return 1;
req->io_task_work.func = io_waitid_cb;
- io_req_task_work_add(req);
+ __io_req_task_work_add(req, IOU_F_TWQ_IN_WAKE);
return 1;
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 24/83] HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (22 preceding siblings ...)
2026-08-31 13:33 ` [PATCH 6.18 23/83] io_uring: defer eventfd signaling when queued from a wakeup handler Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 25/83] HID: asus: simplify RGB init sequence Greg Kroah-Hartman
` (67 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Jose Villaseñor Montfort,
Alec Hall, Jiri Kosina, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jose Villaseñor Montfort <pepemontfort@gmail.com>
[ Upstream commit db8d634128d2ba88d79c0b601e983ebe14bb0519 ]
magicmouse_raw_event() handles DOUBLE_REPORT_ID (0xf7) packets, which pack
two touch reports into one, by splitting the packet and calling itself on
each half. The only guard against runaway recursion is a "size < 1" check,
which stops zero-sized calls but does not bound the recursion depth.
A malicious HID device that matches this driver can send a report starting
with DOUBLE_REPORT_ID and filled with the sequence [0xf7, 0x00]. Each level
consumes two bytes and recurses on the remainder, so an incoming report of
up to HID_MAX_BUFFER_SIZE (16 KiB) drives roughly 8000 nested calls. That
easily exhausts the 16 KiB kernel stack, leading to a stack overflow: a
panic with CONFIG_VMAP_STACK, or memory corruption without it.
A double report only ever wraps two normal reports; it is never
legitimately nested. Refuse to re-enter the DOUBLE_REPORT_ID case from a
recursive call so the recursion depth is bounded to two, while all valid
packets keep being parsed exactly as before.
Fixes: a462230e16ac ("HID: magicmouse: enable Magic Trackpad support")
Link: https://lore.kernel.org/linux-input/20260706181347.700DB1F00A3F@smtp.kernel.org/
Cc: stable@vger.kernel.org
Signed-off-by: Jose Villaseñor Montfort <pepemontfort@gmail.com>
Reviewed-by: Alec Hall <signshop.alec@gmail.com>
Tested-by: Alec Hall <signshop.alec@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-magicmouse.c | 25 ++++++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -383,8 +383,8 @@ static void magicmouse_emit_touch(struct
}
}
-static int magicmouse_raw_event(struct hid_device *hdev,
- struct hid_report *report, u8 *data, int size)
+static int __magicmouse_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size, bool nested)
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
struct input_dev *input = msc->input;
@@ -495,6 +495,15 @@ static int magicmouse_raw_event(struct h
* packet.
*/
+ /*
+ * A double report only ever wraps two normal reports, so it is
+ * never nested. Refuse to recurse a second time; otherwise a
+ * malicious device could chain DOUBLE_REPORT_ID packets to drive
+ * unbounded recursion and overflow the kernel stack.
+ */
+ if (nested)
+ return 0;
+
/* Ensure that we have at least 2 elements (report type and size) */
if (size < 2)
return 0;
@@ -506,9 +515,9 @@ static int magicmouse_raw_event(struct h
return 0;
}
- magicmouse_raw_event(hdev, report, data + 2, data[1]);
- magicmouse_raw_event(hdev, report, data + 2 + data[1],
- size - 2 - data[1]);
+ __magicmouse_raw_event(hdev, report, data + 2, data[1], true);
+ __magicmouse_raw_event(hdev, report, data + 2 + data[1],
+ size - 2 - data[1], true);
return 0;
default:
return 0;
@@ -534,6 +543,12 @@ static int magicmouse_raw_event(struct h
return 1;
}
+static int magicmouse_raw_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *data, int size)
+{
+ return __magicmouse_raw_event(hdev, report, data, size, false);
+}
+
static int magicmouse_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 25/83] HID: asus: simplify RGB init sequence
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (23 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 24/83] HID: magicmouse: prevent unbounded recursion in magicmouse_raw_event() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 26/83] HID: asus: fix missing hid_is_usb() check Greg Kroah-Hartman
` (66 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Benjamin Tissoires,
Antheas Kapenekakis, Ilpo Järvinen, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Antheas Kapenekakis <lkml@antheas.dev>
[ Upstream commit 56d1b33e644cca1bedffbc73d28778ed4ae30f64 ]
Currently, RGB initialization forks depending on whether a device is
NKEY. However, in reality both initialization forks are the same, other
than the NKEY initialization initializing the LED_REPORT_ID1,
LED_REPORT_ID2 endpoints, and the non-NKEY initialization having a
functionality check which is skipped for the NKEY path.
Therefore, merge the if blocks, gate the ID1/ID2 initializations
behind the NKEY quirk instead, and introduce the functionality check
for NKEY devices (it is supported by them).
There should be no functional change with this patch.
Acked-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev>
Link: https://patch.msgid.link/20260122075044.5070-2-lkml@antheas.dev
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Stable-dep-of: 02bf61dfb44f ("HID: asus: fix missing hid_is_usb() check")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-asus.c | 52 ++++++++++++++++++++-----------------------------
1 file changed, 22 insertions(+), 30 deletions(-)
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -638,13 +638,20 @@ static int asus_kbd_register_leds(struct
unsigned char kbd_func;
int ret;
- if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) {
- /* Initialize keyboard */
- ret = asus_kbd_init(hdev, FEATURE_KBD_REPORT_ID);
- if (ret < 0)
- return ret;
+ ret = asus_kbd_init(hdev, FEATURE_KBD_REPORT_ID);
+ if (ret < 0)
+ return ret;
+
+ /* Get keyboard functions */
+ ret = asus_kbd_get_functions(hdev, &kbd_func, FEATURE_KBD_REPORT_ID);
+ if (ret < 0)
+ return ret;
+
+ /* Check for backlight support */
+ if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
+ return -ENODEV;
- /* The LED endpoint is initialised in two HID */
+ if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) {
ret = asus_kbd_init(hdev, FEATURE_KBD_LED_REPORT_ID1);
if (ret < 0)
return ret;
@@ -652,34 +659,19 @@ static int asus_kbd_register_leds(struct
ret = asus_kbd_init(hdev, FEATURE_KBD_LED_REPORT_ID2);
if (ret < 0)
return ret;
+ }
- if (dmi_match(DMI_PRODUCT_FAMILY, "ProArt P16")) {
- ret = asus_kbd_disable_oobe(hdev);
- if (ret < 0)
- return ret;
- }
-
- if (drvdata->quirks & QUIRK_ROG_ALLY_XPAD) {
- intf = to_usb_interface(hdev->dev.parent);
- udev = interface_to_usbdev(intf);
- validate_mcu_fw_version(hdev,
- le16_to_cpu(udev->descriptor.idProduct));
- }
-
- } else {
- /* Initialize keyboard */
- ret = asus_kbd_init(hdev, FEATURE_KBD_REPORT_ID);
- if (ret < 0)
- return ret;
-
- /* Get keyboard functions */
- ret = asus_kbd_get_functions(hdev, &kbd_func, FEATURE_KBD_REPORT_ID);
+ if (dmi_match(DMI_PRODUCT_FAMILY, "ProArt P16")) {
+ ret = asus_kbd_disable_oobe(hdev);
if (ret < 0)
return ret;
+ }
- /* Check for backlight support */
- if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
- return -ENODEV;
+ if (drvdata->quirks & QUIRK_ROG_ALLY_XPAD) {
+ intf = to_usb_interface(hdev->dev.parent);
+ udev = interface_to_usbdev(intf);
+ validate_mcu_fw_version(hdev,
+ le16_to_cpu(udev->descriptor.idProduct));
}
drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 26/83] HID: asus: fix missing hid_is_usb() check
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (24 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 25/83] HID: asus: simplify RGB init sequence Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 27/83] HID: ft260: validate i2c input report length Greg Kroah-Hartman
` (65 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jann Horn, Jiri Kosina, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jann Horn <jannh@google.com>
[ Upstream commit 02bf61dfb44f17ec187d1da1a82495951bbd12df ]
to_usb_interface() can only be used on a hid_device whose parent is really
USB; uhid can create devices that identify as being on BUS_USB, but don't
actually have a USB parent.
Fix the use of to_usb_interface() without a hid_is_usb() check.
I have verified that it is currently possible to trigger a kernel splat due
to this bug in an ASAN build, and that this commit fixes the issue.
Fixes: 00e005c952f7 ("hid-asus: check ROG Ally MCU version and warn")
Cc: stable@vger.kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-asus.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -667,7 +667,7 @@ static int asus_kbd_register_leds(struct
return ret;
}
- if (drvdata->quirks & QUIRK_ROG_ALLY_XPAD) {
+ if ((drvdata->quirks & QUIRK_ROG_ALLY_XPAD) && hid_is_usb(hdev)) {
intf = to_usb_interface(hdev->dev.parent);
udev = interface_to_usbdev(intf);
validate_mcu_fw_version(hdev,
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 27/83] HID: ft260: validate i2c input report length
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (25 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 26/83] HID: asus: fix missing hid_is_usb() check Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 28/83] HID: ft260: fix stack-use-after-return write in I2C read race Greg Kroah-Hartman
` (64 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Sebastián Josué Alba Vives,
Michael Zaidman, Jiri Kosina, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Zaidman <michael.zaidman@gmail.com>
[ Upstream commit 80c4bbb2b38513e9c3d84805fa61a0ee16d79c45 ]
Add two checks to ft260_raw_event() to prevent out-of-bounds reads
from malicious or malfunctioning devices:
First, reject reports shorter than the 2-byte header (report ID +
length fields). Without this, even accessing xfer->length on a
1-byte report is an OOB read.
Second, validate xfer->length against the actual data capacity of
the received HID report. Each I2C data report ID (0xD0 through
0xDE) defines a different report size in the HID descriptor, so the
available payload varies per report. A corrupted length field could
cause memcpy to read beyond the report buffer.
Reported-by: Sebastián Josué Alba Vives <sebasjosue84@gmail.com>
Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Stable-dep-of: bf3e39df3a39 ("HID: ft260: fix stack-use-after-return write in I2C read race")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-ft260.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
--- a/drivers/hid/hid-ft260.c
+++ b/drivers/hid/hid-ft260.c
@@ -1068,10 +1068,22 @@ static int ft260_raw_event(struct hid_de
struct ft260_device *dev = hid_get_drvdata(hdev);
struct ft260_i2c_input_report *xfer = (void *)data;
+ if (size < offsetof(struct ft260_i2c_input_report, data)) {
+ hid_err(hdev, "short report %d\n", size);
+ return -1;
+ }
+
if (xfer->report >= FT260_I2C_REPORT_MIN &&
xfer->report <= FT260_I2C_REPORT_MAX) {
- ft260_dbg("i2c resp: rep %#02x len %d\n", xfer->report,
- xfer->length);
+ ft260_dbg("i2c resp: rep %#02x len %d size %d\n",
+ xfer->report, xfer->length, size);
+
+ if (xfer->length > size -
+ offsetof(struct ft260_i2c_input_report, data)) {
+ hid_err(hdev, "report %#02x: length %d exceeds HID report size\n",
+ xfer->report, xfer->length);
+ return -1;
+ }
if ((dev->read_buf == NULL) ||
(xfer->length > dev->read_len - dev->read_idx)) {
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 28/83] HID: ft260: fix stack-use-after-return write in I2C read race
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (26 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 27/83] HID: ft260: validate i2c input report length Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 29/83] ksmbd: harden file lifetime during session teardown Greg Kroah-Hartman
` (63 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Raman Varabets, Michael Zaidman,
Jiri Kosina, Sasha Levin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Raman Varabets <kernel-linux-20260610-80b7ab08@raman.v1.sg>
[ Upstream commit bf3e39df3a397fd82967a31d17c4e02c7feab221 ]
ft260_i2c_read() points dev->read_buf at a caller-supplied buffer
(often an on-stack variable), arms a completion and waits up to five
seconds for the device to return the data. The HID input callback
ft260_raw_event() runs in the input/IRQ path, independent of the
dev->lock mutex held by the read path, and copies the device-supplied
payload into dev->read_buf after a plain NULL check.
These two paths share read_buf, read_idx and read_len with no
serialization. If the device delays its response until the read
times out, ft260_i2c_read() resets the controller, clears read_buf
and returns, unwinding the stack frame the buffer lived in. A
response that arrives at that moment lets ft260_raw_event() pass the
NULL check and then memcpy() the device-controlled payload into the
now-freed stack location, a bounded but attacker-influenced
stack-use-after-return write triggerable by malicious or
malfunctioning hardware.
Add a dedicated spinlock that serializes every access to read_buf,
read_idx and read_len. ft260_raw_event() now holds it across the
NULL check, the memcpy and the index update, while the read path
takes it when arming and when clearing the buffer, so the teardown
can no longer slip between the check and the copy.
Fixes: 6a82582d9fa4 ("HID: ft260: add usb hid to i2c host bridge driver")
Cc: stable@vger.kernel.org
Signed-off-by: Raman Varabets <kernel-linux-20260610-80b7ab08@raman.v1.sg>
Reviewed-by: Michael Zaidman <michael.zaidman@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hid/hid-ft260.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
--- a/drivers/hid/hid-ft260.c
+++ b/drivers/hid/hid-ft260.c
@@ -240,6 +240,8 @@ struct ft260_device {
struct mutex lock;
u8 write_buf[FT260_REPORT_MAX_LENGTH];
unsigned long need_wakeup_at;
+ /* Protects read_buf, read_idx and read_len against ft260_raw_event() */
+ spinlock_t read_lock;
u8 *read_buf;
u16 read_idx;
u16 read_len;
@@ -501,6 +503,7 @@ static int ft260_i2c_read(struct ft260_d
int timeout, ret = 0;
struct ft260_i2c_read_request_report rep;
struct hid_device *hdev = dev->hdev;
+ unsigned long irqflags;
u8 bus_busy = 0;
if ((flag & FT260_FLAG_START_REPEATED) == FT260_FLAG_START_REPEATED)
@@ -526,9 +529,11 @@ static int ft260_i2c_read(struct ft260_d
reinit_completion(&dev->wait);
+ spin_lock_irqsave(&dev->read_lock, irqflags);
dev->read_idx = 0;
dev->read_buf = data;
dev->read_len = rd_len;
+ spin_unlock_irqrestore(&dev->read_lock, irqflags);
ret = ft260_hid_output_report(hdev, (u8 *)&rep, sizeof(rep));
if (ret < 0) {
@@ -543,7 +548,9 @@ static int ft260_i2c_read(struct ft260_d
goto ft260_i2c_read_exit;
}
+ spin_lock_irqsave(&dev->read_lock, irqflags);
dev->read_buf = NULL;
+ spin_unlock_irqrestore(&dev->read_lock, irqflags);
if (flag & FT260_FLAG_STOP)
bus_busy = FT260_I2C_STATUS_BUS_BUSY;
@@ -562,7 +569,9 @@ static int ft260_i2c_read(struct ft260_d
} while (len > 0);
ft260_i2c_read_exit:
+ spin_lock_irqsave(&dev->read_lock, irqflags);
dev->read_buf = NULL;
+ spin_unlock_irqrestore(&dev->read_lock, irqflags);
return ret;
}
@@ -1018,6 +1027,7 @@ static int ft260_probe(struct hid_device
"FT260 usb-i2c bridge");
mutex_init(&dev->lock);
+ spin_lock_init(&dev->read_lock);
init_completion(&dev->wait);
ret = ft260_xfer_status(dev, FT260_I2C_STATUS_BUS_BUSY);
@@ -1067,6 +1077,7 @@ static int ft260_raw_event(struct hid_de
{
struct ft260_device *dev = hid_get_drvdata(hdev);
struct ft260_i2c_input_report *xfer = (void *)data;
+ unsigned long irqflags;
if (size < offsetof(struct ft260_i2c_input_report, data)) {
hid_err(hdev, "short report %d\n", size);
@@ -1075,6 +1086,8 @@ static int ft260_raw_event(struct hid_de
if (xfer->report >= FT260_I2C_REPORT_MIN &&
xfer->report <= FT260_I2C_REPORT_MAX) {
+ bool complete_read;
+
ft260_dbg("i2c resp: rep %#02x len %d size %d\n",
xfer->report, xfer->length, size);
@@ -1085,8 +1098,15 @@ static int ft260_raw_event(struct hid_de
return -1;
}
+ /*
+ * Hold read_lock so a timed-out ft260_i2c_read() cannot
+ * clear read_buf between the NULL check and the memcpy.
+ */
+ spin_lock_irqsave(&dev->read_lock, irqflags);
+
if ((dev->read_buf == NULL) ||
(xfer->length > dev->read_len - dev->read_idx)) {
+ spin_unlock_irqrestore(&dev->read_lock, irqflags);
hid_err(hdev, "unexpected report %#02x, length %d\n",
xfer->report, xfer->length);
return -1;
@@ -1095,8 +1115,11 @@ static int ft260_raw_event(struct hid_de
memcpy(&dev->read_buf[dev->read_idx], &xfer->data,
xfer->length);
dev->read_idx += xfer->length;
+ complete_read = dev->read_idx == dev->read_len;
+
+ spin_unlock_irqrestore(&dev->read_lock, irqflags);
- if (dev->read_idx == dev->read_len)
+ if (complete_read)
complete(&dev->wait);
} else {
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 29/83] ksmbd: harden file lifetime during session teardown
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (27 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 28/83] HID: ft260: fix stack-use-after-return write in I2C read race Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 30/83] fpga: dfl: fme: add error handling Greg Kroah-Hartman
` (62 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, DaeMyung Kang, Namjae Jeon,
Steve French
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: DaeMyung Kang <charsyam@gmail.com>
commit a42896bebfcc287ed1e61d820a888e33b1eb80ce upstream.
__close_file_table_ids() is the per-session teardown that closes every
fp belonging to a session (or to one tree connect on that session) by
walking the session's volatile-id idr. The current loop has three
related problems on busy or racing workloads:
* Sleeping under ft->lock. The session-teardown skip callback,
session_fd_check(), already sleeps in ksmbd_vfs_copy_durable_owner()
-> kstrdup(GFP_KERNEL) and down_write(&fp->f_ci->m_lock) (a
rw_semaphore). Running the callback inside write_lock(&ft->lock)
trips CONFIG_DEBUG_ATOMIC_SLEEP / CONFIG_PROVE_LOCKING on a
durable-fd workload.
* Refcount accounting blind to f_state. The unconditional
atomic_dec_and_test(&fp->refcount) does not distinguish
FP_INITED (idr-owned reference still intact) from FP_CLOSED (an
earlier ksmbd_close_fd() already consumed the idr-owned reference
while leaving fp in the idr because a holder kept refcount
non-zero). When the latter races with teardown the same path
over-decrements into a holder reference and ksmbd_fd_put() later
UAFs that holder.
* FP_NEW window. Between __open_id() publishing fp into the
session idr and ksmbd_update_fstate(..., FP_INITED) committing the
transition at the end of smb2_open(), an fp is in FP_NEW and an
intervening teardown that takes a transient reference and
unpublishes the volatile id leaves the original idr-owned
reference orphaned -- the opener is unaware that fp has been
unpublished, returns success to the client, and the fp leaks at
refcount = 1.
Refactor __close_file_table_ids() to take a transient reference on fp
and unpublish fp from the session idr *under ft->lock* before calling
skip() outside the lock. A transient ref protects lifetime but not
concurrent field mutation, so the idr_remove() is what keeps
__ksmbd_lookup_fd() through this session's idr from granting a new
ksmbd_fp_get() reference to an fp whose fp->conn / fp->tcon /
fp->volatile_id / op->conn / lock_list links are about to be rewritten
by session_fd_check(). Durable reconnect is unaffected because it
reaches fp through the global durable table (ksmbd_lookup_durable_fd
-> global_ft).
Decide n_to_drop together with any FP_INITED -> FP_CLOSED transition
under ft->lock so teardown and ksmbd_close_fd() never both consume the
idr-owned reference. See ksmbd_mark_fp_closed() for the per-state
accounting. For the FP_NEW path to be safe, the opener has to learn
that fp was unpublished: ksmbd_update_fstate() now returns -ENOENT
when an FP_NEW -> FP_INITED transition finds f_state already advanced
or the volatile id cleared (both committed by teardown under
ft->lock); smb2_open() propagates that as STATUS_OBJECT_NAME_INVALID
and drops the original reference via ksmbd_fd_put().
The list removal cannot be left for a deferred final putter because
fp->volatile_id has already been cleared and __ksmbd_remove_fd() will
intentionally skip both idr_remove() and list_del_init(). Move the
m_fp_list unlink in __ksmbd_remove_fd() above the volatile-id check so
that an FP_NEW fp that happened to be added to m_fp_list (smb2_open()
adds fp->node before ksmbd_update_fstate() runs) is still cleaned up
on the deferred putter path; list_del_init() on an empty node is a
no-op and remains safe for fps that were never added.
Add a defensive guard in session_fd_check() that refuses non-FP_INITED
fps so that even if a teardown reaches an FP_NEW fp it falls into the
close branch (where the n_to_drop = 1 accounting keeps the opener's
reference alive) instead of the durable-preserve branch (which mutates
fp->conn / fp->tcon).
Validation on a debug kernel additionally built with CONFIG_DEBUG_LIST
and CONFIG_DEBUG_OBJECTS_WORK used a same-session two-tcon workload
(open/write storm on one tcon, 50 tree disconnects on the other) and
reported no list-corruption, work_struct ODEBUG, sleep-in-atomic,
lockdep or kmemleak reports. Reverting only the
__close_file_table_ids() hunk while keeping a forced-is_reconnectable()
harness produced the expected sleep-in-atomic at vfs_cache.c:1095,
confirming the ft->lock-out-of-sleepable-skip discipline.
KASAN-enabled direct SMB2 coverage with durable handles enabled
exercised ksmbd_close_tree_conn_fds(), ksmbd_close_session_fds(),
the FP_NEW failure path, tree_conn_fd_check(), and a non-zero
session_fd_check() durable-preserve return. This produced no KASAN,
DEBUG_LIST, ODEBUG, or WARNING reports.
Fixes: f44158485826 ("cifsd: add file operations")
Signed-off-by: DaeMyung Kang <charsyam@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/smb/server/smb2pdu.c | 6 +
fs/smb/server/vfs_cache.c | 179 ++++++++++++++++++++++++++++++++++++++++------
fs/smb/server/vfs_cache.h | 4 -
3 files changed, 164 insertions(+), 25 deletions(-)
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -3765,8 +3765,10 @@ err_out1:
err_out2:
if (!rc) {
- ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
- rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
+ rc = ksmbd_update_fstate(&work->sess->file_table, fp,
+ FP_INITED);
+ if (!rc)
+ rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
}
if (rc) {
if (rc == -EINVAL)
--- a/fs/smb/server/vfs_cache.c
+++ b/fs/smb/server/vfs_cache.c
@@ -358,13 +358,13 @@ static void ksmbd_remove_durable_fd(stru
static void __ksmbd_remove_fd(struct ksmbd_file_table *ft, struct ksmbd_file *fp)
{
- if (!has_file_id(fp->volatile_id))
- return;
-
down_write(&fp->f_ci->m_lock);
list_del_init(&fp->node);
up_write(&fp->f_ci->m_lock);
+ if (!has_file_id(fp->volatile_id))
+ return;
+
write_lock(&ft->lock);
idr_remove(ft->idr, fp->volatile_id);
write_unlock(&ft->lock);
@@ -748,15 +748,58 @@ err_out:
return ERR_PTR(ret);
}
-void ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp,
- unsigned int state)
+/**
+ * ksmbd_update_fstate() - update an fp state under the file-table lock
+ * @ft: file table that publishes @fp's volatile id
+ * @fp: file pointer to update
+ * @state: new state
+ *
+ * Return: 0 on success. The FP_NEW -> FP_INITED transition is special:
+ * -ENOENT if teardown already unpublished @fp by advancing the state or
+ * clearing the volatile id. Other state updates preserve the historical
+ * fire-and-forget behavior.
+ */
+int ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp,
+ unsigned int state)
{
+ int ret;
+
if (!fp)
- return;
+ return -ENOENT;
write_lock(&ft->lock);
- fp->f_state = state;
+ if (state == FP_INITED &&
+ (fp->f_state != FP_NEW || !has_file_id(fp->volatile_id))) {
+ ret = -ENOENT;
+ } else {
+ fp->f_state = state;
+ ret = 0;
+ }
write_unlock(&ft->lock);
+
+ return ret;
+}
+
+/*
+ * ksmbd_mark_fp_closed() - mark fp closed under ft->lock and return how many
+ * refs the teardown path owns.
+ *
+ * FP_INITED has a normal idr-owned reference, so teardown owns both that
+ * reference and the transient lookup reference. FP_NEW is still owned by the
+ * in-flight opener/reopener, which will drop the original reference after
+ * ksmbd_update_fstate(..., FP_INITED) observes the cleared volatile id.
+ * FP_CLOSED on entry means an earlier ksmbd_close_fd() already consumed the
+ * idr-owned ref.
+ */
+static int ksmbd_mark_fp_closed(struct ksmbd_file *fp)
+{
+ if (fp->f_state == FP_INITED) {
+ set_close_state_blocked_works(fp);
+ fp->f_state = FP_CLOSED;
+ return 2;
+ }
+
+ return 1;
}
static int
@@ -764,7 +807,8 @@ __close_file_table_ids(struct ksmbd_sess
struct ksmbd_tree_connect *tcon,
bool (*skip)(struct ksmbd_tree_connect *tcon,
struct ksmbd_file *fp,
- struct ksmbd_user *user))
+ struct ksmbd_user *user),
+ bool skip_preserves_fp)
{
struct ksmbd_file_table *ft = &sess->file_table;
struct ksmbd_file *fp;
@@ -772,32 +816,120 @@ __close_file_table_ids(struct ksmbd_sess
int num = 0;
while (1) {
+ int n_to_drop;
+
write_lock(&ft->lock);
fp = idr_get_next(ft->idr, &id);
if (!fp) {
write_unlock(&ft->lock);
break;
}
-
- if (skip(tcon, fp, sess->user) ||
- !atomic_dec_and_test(&fp->refcount)) {
+ if (!atomic_inc_not_zero(&fp->refcount)) {
id++;
write_unlock(&ft->lock);
continue;
}
- set_close_state_blocked_works(fp);
- idr_remove(ft->idr, fp->volatile_id);
- fp->volatile_id = KSMBD_NO_FID;
- write_unlock(&ft->lock);
+ if (skip_preserves_fp) {
+ /*
+ * Session teardown: skip() is session_fd_check(),
+ * which may sleep and mutates fp->conn / fp->tcon /
+ * fp->volatile_id when it chooses to preserve fp
+ * for durable reconnect. Unpublish fp from the
+ * session idr here, under ft->lock, so that
+ * __ksmbd_lookup_fd() through this session cannot
+ * grant a new ksmbd_fp_get() reference to an fp
+ * whose fields are about to be rewritten outside
+ * the lock. Durable reconnect still reaches fp via
+ * global_ft.
+ */
+ idr_remove(ft->idr, id);
+ fp->volatile_id = KSMBD_NO_FID;
+ write_unlock(&ft->lock);
+ if (skip(tcon, fp, sess->user)) {
+ /*
+ * session_fd_check() has converted fp to
+ * durable-preserve state and cleared its
+ * per-conn fields. fp is already unpublished
+ * above; the original idr-owned ref keeps it
+ * alive for the durable scavenger. Drop only
+ * the transient ref. atomic_dec() is safe --
+ * atomic_inc_not_zero() succeeded on a
+ * positive value and we added one more, so
+ * refcount cannot be zero here.
+ */
+ atomic_dec(&fp->refcount);
+ id++;
+ continue;
+ }
+
+ /*
+ * Keep the close-state decision under the same lock
+ * observed by ksmbd_update_fstate(), which is how an
+ * in-flight FP_NEW opener learns that teardown has
+ * cleared its volatile id.
+ */
+ write_lock(&ft->lock);
+ n_to_drop = ksmbd_mark_fp_closed(fp);
+ write_unlock(&ft->lock);
+ } else {
+ /*
+ * Tree teardown: skip() is tree_conn_fd_check(), a
+ * cheap pointer compare that doesn't sleep and has
+ * no side effects, so keep the skip decision plus
+ * the unpublish-and-mark-closed sequence atomic
+ * under ft->lock. fps belonging to other tree
+ * connects (skip() == true) stay fully published in
+ * the session idr with no lock window.
+ */
+ if (skip(tcon, fp, sess->user)) {
+ atomic_dec(&fp->refcount);
+ write_unlock(&ft->lock);
+ id++;
+ continue;
+ }
+ idr_remove(ft->idr, id);
+ fp->volatile_id = KSMBD_NO_FID;
+ n_to_drop = ksmbd_mark_fp_closed(fp);
+ write_unlock(&ft->lock);
+ }
+
+ /*
+ * fp->volatile_id is already cleared to prevent stale idr
+ * removal from a deferred final close. Remove fp from
+ * m_fp_list here because __ksmbd_remove_fd() will skip the
+ * list unlink when volatile_id is KSMBD_NO_FID.
+ */
down_write(&fp->f_ci->m_lock);
list_del_init(&fp->node);
up_write(&fp->f_ci->m_lock);
- __ksmbd_close_fd(ft, fp);
-
- num++;
+ /*
+ * Drop the references this iteration owns:
+ *
+ * n_to_drop == 2: we observed FP_INITED and committed
+ * the FP_CLOSED transition ourselves, so we own the
+ * transient (+1) and the still-intact idr-owned ref.
+ *
+ * n_to_drop == 1: either a prior ksmbd_close_fd()
+ * already consumed the idr-owned ref, or fp was still
+ * FP_NEW and the in-flight opener/reopener must keep
+ * the original reference until ksmbd_update_fstate()
+ * observes the cleared volatile id.
+ *
+ * If we end up as the final putter, finalize fp and
+ * account the open_files_count decrement via the caller's
+ * atomic_sub(num, ...). Otherwise the remaining user's
+ * ksmbd_fd_put() reaches __put_fd_final(), which does its
+ * own atomic_dec(&open_files_count), so we must not count
+ * this fp here -- doing so would double-decrement the
+ * connection-wide counter.
+ */
+ if (atomic_sub_and_test(n_to_drop, &fp->refcount)) {
+ __ksmbd_close_fd(NULL, fp);
+ num++;
+ }
id++;
}
@@ -1071,6 +1203,9 @@ static bool session_fd_check(struct ksmb
if (!is_reconnectable(fp))
return false;
+ if (fp->f_state != FP_INITED)
+ return false;
+
if (WARN_ON_ONCE(!fp->conn))
return false;
@@ -1122,7 +1257,8 @@ void ksmbd_close_tree_conn_fds(struct ks
{
int num = __close_file_table_ids(work->sess,
work->tcon,
- tree_conn_fd_check);
+ tree_conn_fd_check,
+ false);
atomic_sub(num, &work->conn->stats.open_files_count);
}
@@ -1131,7 +1267,8 @@ void ksmbd_close_session_fds(struct ksmb
{
int num = __close_file_table_ids(work->sess,
work->tcon,
- session_fd_check);
+ session_fd_check,
+ true);
atomic_sub(num, &work->conn->stats.open_files_count);
}
@@ -1271,7 +1408,7 @@ void ksmbd_destroy_file_table(struct ksm
if (!ft->idr)
return;
- __close_file_table_ids(sess, NULL, session_fd_check);
+ __close_file_table_ids(sess, NULL, session_fd_check, true);
idr_destroy(ft->idr);
kfree(ft->idr);
ft->idr = NULL;
--- a/fs/smb/server/vfs_cache.h
+++ b/fs/smb/server/vfs_cache.h
@@ -175,8 +175,8 @@ int ksmbd_close_inode_fds(struct ksmbd_w
int ksmbd_init_global_file_table(void);
void ksmbd_free_global_file_table(void);
void ksmbd_set_fd_limit(unsigned long limit);
-void ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp,
- unsigned int state);
+int ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp,
+ unsigned int state);
bool ksmbd_vfs_compare_durable_owner(struct ksmbd_file *fp,
struct ksmbd_user *user);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 30/83] fpga: dfl: fme: add error handling
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (28 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 29/83] ksmbd: harden file lifetime during session teardown Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 31/83] accessibility: speakup: unregister tty ldisc on later init failures Greg Kroah-Hartman
` (61 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, Xu Yilun, Tom Rix,
Moritz Fischer, Griffin Kroah-Hartman, Xu Yilun
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Griffin Kroah-Hartman <griffin@kroah.com>
commit b5ba63e247075087ab8a6a087622c762dc4172e9 upstream.
Add error handling to devm_kasprint in fme_perf_pmu_register().
Assisted-by: gkh_clanker_2000
Fixes: 724142f8c42a ("fpga: dfl: fme: add performance reporting support")
Cc: stable@kernel.org
Cc: Xu Yilun <yilun.xu@intel.com>
Cc: Tom Rix <trix@redhat.com>
Cc: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Griffin Kroah-Hartman <griffin@kroah.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Yilun: Fix stable tag, add Fixes tag ]
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/2026070620-unwired-clay-f6cc@gregkh
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/fpga/dfl-fme-perf.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/fpga/dfl-fme-perf.c
+++ b/drivers/fpga/dfl-fme-perf.c
@@ -925,6 +925,8 @@ static int fme_perf_pmu_register(struct
PERF_PMU_CAP_NO_EXCLUDE;
name = devm_kasprintf(priv->dev, GFP_KERNEL, "dfl_fme%d", pdev->id);
+ if (!name)
+ return -ENOMEM;
ret = perf_pmu_register(pmu, name, -1);
if (ret)
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 31/83] accessibility: speakup: unregister tty ldisc on later init failures
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (29 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 30/83] fpga: dfl: fme: add error handling Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 32/83] usb: xhci: Handle bogus TRB pointers in Missed Service Error events Greg Kroah-Hartman
` (60 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Haoxiang Li, Samuel Thibault
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
commit a76acbaec9b8fd74413646984d2e3626d0543e39 upstream.
The ldisc registration is intentionally non-fatal, since some synth
drivers do not use tty/ldisc. However, once speakup_init() continues
past the registration point and later fails, the init unwind path should
mirror speakup_exit() and call spk_ttyio_unregister_ldisc().
Add the missing unregister call to the error path after synth_release(),
matching the normal module exit cleanup order.
Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Fixes: e23a9b439ce9 ("staging: speakup: safely register and unregister ldisc")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260531230804.254962-16-samuel.thibault@ens-lyon.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/accessibility/speakup/main.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/accessibility/speakup/main.c
+++ b/drivers/accessibility/speakup/main.c
@@ -2444,6 +2444,7 @@ error_kbdnotifier:
mutex_lock(&spk_mutex);
synth_release();
mutex_unlock(&spk_mutex);
+ spk_ttyio_unregister_ldisc();
speakup_kobj_exit();
error_kobjects:
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 32/83] usb: xhci: Handle bogus TRB pointers in Missed Service Error events
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (30 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 31/83] accessibility: speakup: unregister tty ldisc on later init failures Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 33/83] usb: xhci: Handle USB3 port events when there is one roothub Greg Kroah-Hartman
` (59 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Bart Nagel, Mathias Nyman,
Michal Pecio
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michal Pecio <michal.pecio@gmail.com>
commit 3d9eeb336131bc5a174367c384fa00c15c8744fd upstream.
xHCI 1.0 allowed these pointers to be zero. Some Intel chipsets from the
era usually set it to zero, but sometimes (apparently) to the next TRB
after the one referenced by the previous transfer event on the endpoint.
Usually that's indeed the missed TD, but it may also be the last TRB of
a two-TRB TD already completed with Short Packet on its first TRB. Then
the driver skips all pending TDs, failing to find a match.
When handling Missed Service Error, scan TD list twice and only really
skip TDs in the second pass if the first pass found a match. This won't
catch bogus pointers to wrong TDs, but such a bug would be practically
impossible to detect automatically and isn't known to exist.
Reported-by: Bart Nagel <bart@tremby.net>
Closes: https://lore.kernel.org/linux-usb/al_hchyOdPoPWKEo@spiral/
Suggested-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Fixes: d0b619599e52 ("usb: xhci: Expedite skipping missed isoch TDs on modern HCs")
Cc: stable@vger.kernel.org
Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260806142113.2436238-18-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-ring.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2653,6 +2653,17 @@ static bool xhci_spurious_success_tx_eve
}
}
+static struct xhci_td *find_td_by_dma(struct xhci_ring *ep_ring, dma_addr_t dma)
+{
+ struct xhci_td *td;
+
+ if (dma)
+ list_for_each_entry(td, &ep_ring->td_list, td_list)
+ if (trb_in_td(td, dma))
+ return td;
+ return NULL;
+}
+
/*
* If this function returns an error condition, it means it got a Transfer
* event with a corrupted Slot ID, Endpoint ID, or TRB DMA address.
@@ -2845,8 +2856,11 @@ static int handle_tx_event(struct xhci_h
xhci_dequeue_td(xhci, td, ep_ring, td->status);
}
- /* If the TRB pointer is NULL, missed TDs will be skipped on the next event */
- if (trb_comp_code == COMP_MISSED_SERVICE_ERROR && !ep_trb_dma)
+ /*
+ * We don't know how many TDs were missed when ep_trb_dma is zero (as permitted by
+ * xHCI 1.0) or bogus. Bail out leaving ep->skip set, next event will sort it out.
+ */
+ if (trb_comp_code == COMP_MISSED_SERVICE_ERROR && !find_td_by_dma(ep_ring, ep_trb_dma))
return 0;
if (list_empty(&ep_ring->td_list)) {
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 33/83] usb: xhci: Handle USB3 port events when there is one roothub
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (31 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 32/83] usb: xhci: Handle bogus TRB pointers in Missed Service Error events Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 34/83] xhci: dbgtty: Fix unregister on tty_register_driver() failure Greg Kroah-Hartman
` (58 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Semih Baskan, Mathias Nyman
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Semih Baskan <strst.gs@gmail.com>
commit 3e91ec3e7d80a327fb558207613c80415d3bf756 upstream.
handle_port_status() drops every USB3 port event when xhci->shared_hcd is
NULL. The check dates from a time when xhci-plat always created a shared
hcd, so a NULL one could only mean the hcd had been removed.
Since commit 4736ebd7fcaf ("usb: host: xhci-plat: omit shared hcd if
either root hub has no ports") that is no longer true. A controller whose
USB2 root hub has no ports gets a single roothub, the USB3 rhub is served
by the main hcd, and shared_hcd stays NULL for the lifetime of the device.
Every SuperSpeed port event is then thrown away as bogus behind a debug
message, so devices never enumerate even though the port sees the device
and its change bits stay set:
0x006a1203 Powered Connected Enabled Link:U0 PortSpeed:4
Change: CSC WRC PRC PLC
Broadcom Northstar is such a controller. USB3 works there up to 5.15 and
stops working from 5.19 onwards.
Ask xhci_get_usb3_hcd() instead. It returns the shared hcd when there is
one, the main hcd when the USB2 root hub has no ports, and NULL once the
shared hcd is gone, which keeps the original meaning of the check.
Tested on an Asus RT-N18U (BCM47081), which has a single roothub. Before
the change nothing enumerates on the USB3 port; after it SuperSpeed
devices enumerate normally over repeated connect and disconnect cycles,
the change bits shown above clear, and USB2 is unaffected on both ports.
Fixes: 4736ebd7fcaf ("usb: host: xhci-plat: omit shared hcd if either root hub has no ports")
Cc: stable@vger.kernel.org
Signed-off-by: Semih Baskan <strst.gs@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260806142113.2436238-17-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-ring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2026,7 +2026,7 @@ static void handle_port_status(struct xh
vdev = xhci->devs[port->slot_id];
/* We might get interrupts after shared_hcd is removed */
- if (port->rhub == &xhci->usb3_rhub && xhci->shared_hcd == NULL) {
+ if (port->rhub == &xhci->usb3_rhub && xhci_get_usb3_hcd(xhci) == NULL) {
xhci_dbg(xhci, "ignore port event for removed USB3 hcd\n");
bogus_port_status = true;
goto cleanup;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 34/83] xhci: dbgtty: Fix unregister on tty_register_driver() failure
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (32 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 33/83] usb: xhci: Handle USB3 port events when there is one roothub Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 35/83] xhci: dbgtty: Fix unregister on tty_alloc_driver() failure Greg Kroah-Hartman
` (57 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Mathias Nyman, Lucas De Marchi
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lucas De Marchi <ldemarchi@nvidia.com>
commit a916fa66a43e10f63198b6ce978badffc678821a upstream.
If tty_register_driver() fails, it drops the reference, but fails to set
the global dbc_tty_driver to NULL, causing the unregister to be called
again when module exits.
On module unload dbc_tty_exit() only gates its cleanup on the driver
pointer being non-NULL, so it operates on the already-freed driver:
module_init(xhci_hcd_init)
xhci_hcd_init()
xhci_dbc_init() [return value ignored]
dbc_tty_init()
tty_register_driver() fails
tty_driver_kref_put() -> driver freed
(dbc_tty_driver left dangling)
...
module_exit(xhci_hcd_fini)
xhci_hcd_fini()
xhci_dbc_exit()
dbc_tty_exit()
if (dbc_tty_driver) -> true (dangling)
tty_unregister_driver() -> use-after-free
Fixes: 4521f1613940 ("xhci: dbctty: split dbc tty driver registration and unregistration functions.")
Cc: stable@vger.kernel.org # v5.10
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lucas De Marchi <ldemarchi@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260806142113.2436238-8-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-dbgtty.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -651,6 +651,7 @@ int dbc_tty_init(void)
pr_err("Can't register dbc tty driver\n");
tty_driver_kref_put(dbc_tty_driver);
idr_destroy(&dbc_tty_minors);
+ dbc_tty_driver = NULL;
}
return ret;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 35/83] xhci: dbgtty: Fix unregister on tty_alloc_driver() failure
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (33 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 34/83] xhci: dbgtty: Fix unregister on tty_register_driver() failure Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 36/83] fuse: fix invalidate lock leak on setattr writeback failure Greg Kroah-Hartman
` (56 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Mathias Nyman, Lucas De Marchi
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lucas De Marchi <ldemarchi@nvidia.com>
commit 25b8dfc13495a6c1cf4abacc8ef20196c7f20e5c upstream.
Make sure to set dbc_tty_driver to NULL to match the check in
dbc_tty_exit(). For that, make detached error handling path common to the
other branch in the same function.
Fixes: 4521f1613940 ("xhci: dbctty: split dbc tty driver registration and unregistration functions.")
Cc: stable@vger.kernel.org # v5.10
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lucas De Marchi <ldemarchi@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260806142113.2436238-9-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-dbgtty.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -628,8 +628,8 @@ int dbc_tty_init(void)
dbc_tty_driver = tty_alloc_driver(64, TTY_DRIVER_REAL_RAW |
TTY_DRIVER_DYNAMIC_DEV);
if (IS_ERR(dbc_tty_driver)) {
- idr_destroy(&dbc_tty_minors);
- return PTR_ERR(dbc_tty_driver);
+ ret = PTR_ERR(dbc_tty_driver);
+ goto fail;
}
dbc_tty_driver->driver_name = "dbc_serial";
@@ -649,12 +649,18 @@ int dbc_tty_init(void)
ret = tty_register_driver(dbc_tty_driver);
if (ret) {
pr_err("Can't register dbc tty driver\n");
- tty_driver_kref_put(dbc_tty_driver);
- idr_destroy(&dbc_tty_minors);
- dbc_tty_driver = NULL;
+ goto fail_put;
}
return ret;
+
+fail_put:
+ tty_driver_kref_put(dbc_tty_driver);
+fail:
+ idr_destroy(&dbc_tty_minors);
+ dbc_tty_driver = NULL;
+
+ return ret;
}
void dbc_tty_exit(void)
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 36/83] fuse: fix invalidate lock leak on setattr writeback failure
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (34 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 35/83] xhci: dbgtty: Fix unregister on tty_alloc_driver() failure Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 37/83] fuse: fix invalidate lock leak on open O_TRUNC DAX failure Greg Kroah-Hartman
` (55 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Baokun Li, Miklos Szeredi
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baokun Li <libaokun@linux.alibaba.com>
commit 9afeca0d569c9fc89d758fe7a9339d1e8afb1546 upstream.
fuse_do_setattr() takes filemap_invalidate_lock() for a DAX truncate
(fault_blocked = true) and releases it at the out:/error: labels. But
when a writeback flush is also needed, a write_inode_now() failure
returns directly and leaks the lock, so any later fault or truncate on
the file stalls on the stale rwsem.
For example, truncate(2) on a setuid file reaches fuse_do_setattr()
with both ATTR_SIZE and ATTR_MODE set:
truncate(2)
└─ do_truncate()
├─ dentry_needs_remove_privs() # S_ISUID
└─ notify_change() # KILL_SUID -> ATTR_MODE
└─ fuse_setattr() # no killpriv:
│ # ia_valid |= ATTR_MODE
└─ fuse_do_setattr()
├─ filemap_invalidate_lock() # IS_DAX && is_truncate
└─ write_inode_now() # is_wb && ATTR_MODE
└─ if (err) # e.g. daemon -> -EIO
return err # <- lock leaked
Fix this by adding an unlock label that releases the lock before
returning the error, and use it for the fuse_dax_break_layouts()
failure path as well.
Fixes: 6ae330cad6ef ("virtiofs: serialize truncate/punch_hole and dax fault path")
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Baokun Li <libaokun@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/fuse/dir.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1976,10 +1976,8 @@ int fuse_do_setattr(struct mnt_idmap *id
filemap_invalidate_lock(mapping);
fault_blocked = true;
err = fuse_dax_break_layouts(inode, 0, -1);
- if (err) {
- filemap_invalidate_unlock(mapping);
- return err;
- }
+ if (err)
+ goto unlock;
}
if (attr->ia_valid & ATTR_OPEN) {
@@ -2006,7 +2004,7 @@ int fuse_do_setattr(struct mnt_idmap *id
ATTR_TIMES_SET)) {
err = write_inode_now(inode, true);
if (err)
- return err;
+ goto unlock;
fuse_set_nowrite(inode);
fuse_release_nowrite(inode);
@@ -2114,6 +2112,7 @@ error:
clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
+unlock:
if (fault_blocked)
filemap_invalidate_unlock(mapping);
return err;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 37/83] fuse: fix invalidate lock leak on open O_TRUNC DAX failure
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (35 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 36/83] fuse: fix invalidate lock leak on setattr writeback failure Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 38/83] usb: usbtest: disable dynamic ID support Greg Kroah-Hartman
` (54 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Baokun Li, Miklos Szeredi
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Baokun Li <libaokun@linux.alibaba.com>
commit a927f1867e61b78f39f9da0bbba3c98c2ca151fe upstream.
fuse_open() takes filemap_invalidate_lock() for a DAX truncate
(dax_truncate = true) and releases it before the out_inode_unlock
label. But when fuse_dax_break_layouts() fails, the goto
out_inode_unlock skips the unlock and leaks the rwsem, so any later
fault or truncate on the file stalls on the stale lock.
fuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal
interrupts the wait for busy DAX pages to drain:
open("file", O_RDWR | O_TRUNC)
└─ fuse_open()
├─ filemap_invalidate_lock() # dax_truncate
└─ fuse_dax_break_layouts()
└─ dax_break_layout()
└─ wait_page_idle() # TASK_INTERRUPTIBLE
└─ fuse_wait_dax_page() # unlock, schedule, re-lock
└─ signal → -ERESTARTSYS
goto out_inode_unlock # <- lock leaked
Fix this by moving filemap_invalidate_unlock() below the label so
that all error paths release the lock, and rename the label to
out_unlock as it now covers more than just the inode lock.
Fixes: 2fdbb8dd0155 ("fuse: fix deadlock between atomic O_TRUNC and page invalidation")
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: Baokun Li <libaokun@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/fuse/file.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -268,7 +268,7 @@ static int fuse_open(struct inode *inode
filemap_invalidate_lock(inode->i_mapping);
err = fuse_dax_break_layouts(inode, 0, -1);
if (err)
- goto out_inode_unlock;
+ goto out_unlock;
}
if (is_wb_truncate || dax_truncate)
@@ -292,9 +292,9 @@ static int fuse_open(struct inode *inode
else if (!(ff->open_flags & FOPEN_KEEP_CACHE))
invalidate_inode_pages2(inode->i_mapping);
}
+out_unlock:
if (dax_truncate)
filemap_invalidate_unlock(inode->i_mapping);
-out_inode_unlock:
if (is_wb_truncate || dax_truncate)
inode_unlock(inode);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 38/83] usb: usbtest: disable dynamic ID support
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (36 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 37/83] fuse: fix invalidate lock leak on open O_TRUNC DAX failure Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 39/83] usb: gadget: f_tcm: keep port count until LUN teardown completes Greg Kroah-Hartman
` (53 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+7e1e5911f9eac50bedc7,
Aleksandr Nogikh, syzbot
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aleksandr Nogikh <nogikh@google.com>
commit 00e2071f6d5621a5ddea311a5e6b143ae6e474af upstream.
The usbtest driver relies on the driver_info field of struct usb_device_id
to point to a valid struct usbtest_info descriptor. This structure contains
essential test configurations, such as endpoint addresses and test modes,
which are required during probe.
When a user dynamically adds a new device ID via the sysfs new_id
interface without specifying a reference device, the USB core initializes
driver_info to 0 (NULL). When a matching device is subsequently probed,
usbtest_probe() unconditionally casts driver_info to a struct usbtest_info
pointer and dereferences it, leading to a NULL pointer dereference crash:
Oops: general protection fault, probably for non-canonical address
0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
RIP: 0010:usbtest_probe+0x3b9/0x1280 drivers/usb/misc/usbtest.c:2822
Because usbtest strictly requires pre-defined usbtest_info descriptors
to function, dynamic ID binding via sysfs is fundamentally unsupported
for this driver.
Fix this by setting .no_dynamic_id = 1 on usbtest_driver. This instructs
the USB core to skip creating the new_id and remove_id sysfs interfaces
for usbtest, preventing invalid dynamic ID entries from being created.
Cc: stable@vger.kernel.org
Reported-by: syzbot+7e1e5911f9eac50bedc7@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=7e1e5911f9eac50bedc7
Signed-off-by: Aleksandr Nogikh <nogikh@google.com>
Tested-by: syzbot@syzkaller.appspotmail.com
Link: https://patch.msgid.link/20260806152651.2370795-1-nogikh@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/misc/usbtest.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -3054,6 +3054,7 @@ static struct usb_driver usbtest_driver
.disconnect = usbtest_disconnect,
.suspend = usbtest_suspend,
.resume = usbtest_resume,
+ .no_dynamic_id = 1,
};
/*-------------------------------------------------------------------------*/
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 39/83] usb: gadget: f_tcm: keep port count until LUN teardown completes
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (37 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 38/83] usb: usbtest: disable dynamic ID support Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 40/83] KVM: SEV: Drop FOLL_WRITE for encrypted region registration Greg Kroah-Hartman
` (52 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Shuangpeng Bai
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
commit c39d0916da47d94909391876c9e5bd429ea7b1b9 upstream.
tcm_usbg_drop_nexus() permits session removal once tpg_port_count
reaches zero. However, usbg_port_unlink() currently decrements that
count from the fabric_pre_unlink() callback, before core_dev_del_lun()
waits for active se_lun references to drain.
If removal of the last LUN races a nexus removal, the latter can observe
a zero port count and call target_remove_session(). This frees
sess_cmd_map while an in-flight struct usbg_cmd, including its work item,
can still be accessed.
Overlapping the last-LUN unlink with nexus removal reproduces this
lifetime violation as a DEBUG_OBJECTS "free active" warning for
usbg_cmd_work, followed by a target-core BUG/Oops.
The generic target-core unlink path has no callback after
core_dev_del_lun() completes. Add an optional fabric_post_unlink()
callback and use it for the f_tcm port count. The count now remains
nonzero until core_dev_del_lun() has finished draining active LUN
references, preventing nexus removal from freeing the session during
command completion.
Fixes: c52661d60f63 ("usb-gadget: Initial merge of target module for UASP + BOT")
Cc: stable@vger.kernel.org
Signed-off-by: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
Link: https://patch.msgid.link/20260807060733.3186624-1-shuangpeng.kernel@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/target/target_core_fabric_configfs.c | 8 ++++++++
drivers/usb/gadget/function/f_tcm.c | 2 +-
include/target/target_core_fabric.h | 2 ++
3 files changed, 11 insertions(+), 1 deletion(-)
--- a/drivers/target/target_core_fabric_configfs.c
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -690,6 +690,14 @@ static void target_fabric_port_unlink(
}
core_dev_del_lun(se_tpg, lun);
+
+ if (tf->tf_ops->fabric_post_unlink) {
+ /*
+ * Allow fabrics to release state that must remain valid until
+ * core_dev_del_lun() has drained all active LUN references.
+ */
+ tf->tf_ops->fabric_post_unlink(se_tpg, lun);
+ }
}
static void target_fabric_port_release(struct config_item *item)
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -2023,7 +2023,7 @@ static const struct target_core_fabric_o
.fabric_enable_tpg = usbg_enable_tpg,
.fabric_drop_tpg = usbg_drop_tpg,
.fabric_post_link = usbg_port_link,
- .fabric_pre_unlink = usbg_port_unlink,
+ .fabric_post_unlink = usbg_port_unlink,
.fabric_init_nodeacl = usbg_init_nodeacl,
.tfc_wwn_attrs = usbg_wwn_attrs,
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -95,6 +95,8 @@ struct target_core_fabric_ops {
struct se_lun *);
void (*fabric_pre_unlink)(struct se_portal_group *,
struct se_lun *);
+ void (*fabric_post_unlink)(struct se_portal_group *se_tpg,
+ struct se_lun *lun);
struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
struct config_group *, const char *);
void (*fabric_drop_np)(struct se_tpg_np *);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 40/83] KVM: SEV: Drop FOLL_WRITE for encrypted region registration
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (38 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 39/83] usb: gadget: f_tcm: keep port count until LUN teardown completes Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 41/83] KVM: SEV: Track the GPA of the guest-controlled VMSA used for SNP guests Greg Kroah-Hartman
` (51 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, David Hildenbrand (Arm),
Pankaj Gupta, Lorenzo Stoakes (ARM), Sean Christopherson
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pankaj Gupta <pankaj.gupta@amd.com>
commit ee1a586dd1fa2f245b3b753a3e44d9263a49240b upstream.
When pinning SEV guest memory, drop FOLL_WRITE and rely on FOLL_LONGTERM
to break CoW, as *KVM* doesn't actually to the memory using the GUP'd
pages. Omitting FOLL_WRITE fixes a regression when using file-backed guest
memory that was introduced when KVM (correctly) added FOLL_LONG (e.g. to
ensure anonymous memory is migrated out of MIGRATE_CMA/ZONE_MOVABLE before
a long term pin).
Unfortunately, as of commits:
8ac268436e6d ("mm/gup: disallow FOLL_LONGTERM GUP-nonfast writing to file-backed mappings")
a6e79df92e4a ("mm/gup: disallow FOLL_LONGTERM GUP-fast writing to file-backed mappings")
GUP uses FOLL_LONGTERM as a canary of sorts to detect pins that are likely
to be problematic, and disallows WRITE+LONGTERM pins for file-backed memory.
As a result, backing SEV+ guests with file-backed memory, e.g. virtio-pmem,
fails due to the disallowed FOLL_LONGTERM+FOLL_WRITE combination.
Note, in the past, FOLL_WRITE was required to trigger CoW unsharing, to
prevent replacing the page in the (primary MMU's) page tables during a
later write fault after already having pinned a (shared) page in
MAP_PRIVATE mappings. FOLL_LONGTERM does that nowadays, even without
FOLL_WRITE (see gup_must_unshare()).
Fixes: 7e066cb9b71a ("KVM: SEV: Use long-term pin when registering encrypted memory regions")
Cc: stable@vger.kernel.org
Suggested-by: "David Hildenbrand (Arm)" <david@kernel.org>
Link: https://lore.kernel.org/all/ad784f05-b36c-4e91-9f17-4c5b826735d0@kernel.org/
Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Link: https://patch.msgid.link/20260715063626.65899-1-pankaj.gupta@amd.com
[sean: massage changelog, add comment about CoW unsharing]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/svm/sev.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2727,8 +2727,12 @@ int sev_mem_enc_register_region(struct k
if (!region)
return -ENOMEM;
+ /*
+ * Do NOT specify FOLL_WRITE, as KVM isn't using the pinned pages to
+ * write memory, and FOLL_LONGTERM itself triggers CoW unshare.
+ */
region->pages = sev_pin_memory(kvm, range->addr, range->size, ®ion->npages,
- FOLL_WRITE | FOLL_LONGTERM);
+ FOLL_LONGTERM);
if (IS_ERR(region->pages)) {
ret = PTR_ERR(region->pages);
goto e_free;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 41/83] KVM: SEV: Track the GPA of the guest-controlled VMSA used for SNP guests
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (39 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 40/83] KVM: SEV: Drop FOLL_WRITE for encrypted region registration Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 42/83] KVM: SEV: Extract loading of guest-provided VMSA to a separate helper Greg Kroah-Hartman
` (50 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Michael Roth, Sean Christopherson
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sean Christopherson <seanjc@google.com>
commit 42a39ad5d592aec87a70527a4e694f6210694482 upstream.
Track the GPA of the guest-provided VMSA used after AP_CREATION events when
running SNP guests, instead of simply tracking whether or not the vCPU is
using a guest-provided VMSA. KVM needs to know the GPA of the VMSA that's
actively being used so that it can react to MMU invalidation events, i.e.
so that KVM can drop the VMSA if its backing guest_memfd page is punched
out of existence.
Opportunistically rename snp_vmsa_gpa to clarify that it tracks the pending
VMSA GPA, whereas snp_guest_vmsa_gpa now tracks the in-use VMSA GPA.
Note! Take care to track the GPA, not the GFN, as VALID_PAGE() won't
behave correctly if an invalid GFN is converted to a GPA for checking.
Note #2! Keep snp_has_guest_vmsa so that switching to a guest-provided
VMSA is sticky, even if the guest-provided VMSA becomes invalid.
No functional change intended.
Cc: stable@vger.kernel.org # 6.12.x
Reviewed-by: Michael Roth <michael.roth@amd.com>
Link: https://patch.msgid.link/20260709204948.1988414-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/svm/sev.c | 14 +++++++++-----
arch/x86/kvm/svm/svm.h | 3 ++-
2 files changed, 11 insertions(+), 6 deletions(-)
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -4037,6 +4037,7 @@ static void sev_snp_init_protected_guest
/* Clear use of the VMSA */
svm->vmcb->control.vmsa_pa = INVALID_PAGE;
+ svm->sev_es.snp_guest_vmsa_gpa = INVALID_PAGE;
/*
* When replacing the VMSA during SEV-SNP AP creation,
@@ -4044,11 +4045,11 @@ static void sev_snp_init_protected_guest
*/
vmcb_mark_all_dirty(svm->vmcb);
- if (!VALID_PAGE(svm->sev_es.snp_vmsa_gpa))
+ if (!VALID_PAGE(svm->sev_es.snp_pending_vmsa_gpa))
return;
- gfn = gpa_to_gfn(svm->sev_es.snp_vmsa_gpa);
- svm->sev_es.snp_vmsa_gpa = INVALID_PAGE;
+ gfn = gpa_to_gfn(svm->sev_es.snp_pending_vmsa_gpa);
+ svm->sev_es.snp_pending_vmsa_gpa = INVALID_PAGE;
slot = gfn_to_memslot(vcpu->kvm, gfn);
if (!slot)
@@ -4073,6 +4074,7 @@ static void sev_snp_init_protected_guest
svm->sev_es.snp_has_guest_vmsa = true;
/* Use the new VMSA */
+ svm->sev_es.snp_guest_vmsa_gpa = gfn_to_gpa(gfn);
svm->vmcb->control.vmsa_pa = pfn_to_hpa(pfn);
/* Mark the vCPU as runnable */
@@ -4139,10 +4141,10 @@ static int sev_snp_ap_creation(struct vc
return -EINVAL;
}
- target_svm->sev_es.snp_vmsa_gpa = svm->vmcb->control.exit_info_2;
+ target_svm->sev_es.snp_pending_vmsa_gpa = svm->vmcb->control.exit_info_2;
break;
case SVM_VMGEXIT_AP_DESTROY:
- target_svm->sev_es.snp_vmsa_gpa = INVALID_PAGE;
+ target_svm->sev_es.snp_pending_vmsa_gpa = INVALID_PAGE;
break;
default:
vcpu_unimpl(vcpu, "vmgexit: invalid AP creation request [%#x] from guest\n",
@@ -4731,6 +4733,8 @@ int sev_vcpu_create(struct kvm_vcpu *vcp
return -ENOMEM;
svm->sev_es.vmsa = page_address(vmsa_page);
+ svm->sev_es.snp_pending_vmsa_gpa = INVALID_PAGE;
+ svm->sev_es.snp_guest_vmsa_gpa = INVALID_PAGE;
vcpu->arch.guest_tsc_protected = snp_is_secure_tsc_enabled(vcpu->kvm);
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -248,7 +248,8 @@ struct vcpu_sev_es_state {
u64 ghcb_registered_gpa;
struct mutex snp_vmsa_mutex; /* Used to handle concurrent updates of VMSA. */
- gpa_t snp_vmsa_gpa;
+ gpa_t snp_pending_vmsa_gpa;
+ gpa_t snp_guest_vmsa_gpa;
bool snp_ap_waiting_for_reset;
bool snp_has_guest_vmsa;
};
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 42/83] KVM: SEV: Extract loading of guest-provided VMSA to a separate helper
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (40 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 41/83] KVM: SEV: Track the GPA of the guest-controlled VMSA used for SNP guests Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 43/83] KVM: SEV: Mark vCPU RUNNABLE after AP_CREATE, even if VMSA is unusable Greg Kroah-Hartman
` (49 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Michael Roth, Sean Christopherson
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sean Christopherson <seanjc@google.com>
commit 0060569e4f18a7dee2dd8728595e909f19a23c24 upstream.
Extract the loading/retrieval of a guest-provided VMSA to a separate helper
so that KVM can reuse the core logic when refreshing the VMSA after an MMU
invalidation from guest_memfd.
No functional change intended.
Cc: stable@vger.kernel.org # 6.12.x
Reviewed-by: Michael Roth <michael.roth@amd.com>
Link: https://patch.msgid.link/20260709204948.1988414-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/svm/sev.c | 52 +++++++++++++++++++++++++++++--------------------
1 file changed, 31 insertions(+), 21 deletions(-)
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -4013,29 +4013,17 @@ next_range:
BUG();
}
-/*
- * Invoked as part of svm_vcpu_reset() processing of an init event.
- */
-static void sev_snp_init_protected_guest_state(struct kvm_vcpu *vcpu)
+static void sev_snp_reload_vmsa(struct kvm_vcpu *vcpu, gpa_t gpa)
{
struct vcpu_svm *svm = to_svm(vcpu);
struct kvm_memory_slot *slot;
+ gfn_t gfn = gpa_to_gfn(gpa);
struct page *page;
kvm_pfn_t pfn;
- gfn_t gfn;
-
- guard(mutex)(&svm->sev_es.snp_vmsa_mutex);
- if (!svm->sev_es.snp_ap_waiting_for_reset)
- return;
-
- svm->sev_es.snp_ap_waiting_for_reset = false;
+ lockdep_assert_held(&svm->sev_es.snp_vmsa_mutex);
- /* Mark the vCPU as offline and not runnable */
- vcpu->arch.pv.pv_unhalted = false;
- kvm_set_mp_state(vcpu, KVM_MP_STATE_HALTED);
-
- /* Clear use of the VMSA */
+ /* Clear use of the VMSA. */
svm->vmcb->control.vmsa_pa = INVALID_PAGE;
svm->sev_es.snp_guest_vmsa_gpa = INVALID_PAGE;
@@ -4045,12 +4033,9 @@ static void sev_snp_init_protected_guest
*/
vmcb_mark_all_dirty(svm->vmcb);
- if (!VALID_PAGE(svm->sev_es.snp_pending_vmsa_gpa))
+ if (!VALID_PAGE(gpa))
return;
- gfn = gpa_to_gfn(svm->sev_es.snp_pending_vmsa_gpa);
- svm->sev_es.snp_pending_vmsa_gpa = INVALID_PAGE;
-
slot = gfn_to_memslot(vcpu->kvm, gfn);
if (!slot)
return;
@@ -4074,7 +4059,7 @@ static void sev_snp_init_protected_guest
svm->sev_es.snp_has_guest_vmsa = true;
/* Use the new VMSA */
- svm->sev_es.snp_guest_vmsa_gpa = gfn_to_gpa(gfn);
+ svm->sev_es.snp_guest_vmsa_gpa = gpa;
svm->vmcb->control.vmsa_pa = pfn_to_hpa(pfn);
/* Mark the vCPU as runnable */
@@ -4088,6 +4073,31 @@ static void sev_snp_init_protected_guest
kvm_release_page_clean(page);
}
+/*
+ * Invoked as part of svm_vcpu_reset() processing of an init event.
+ */
+static void sev_snp_init_protected_guest_state(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+ gpa_t gpa;
+
+ guard(mutex)(&svm->sev_es.snp_vmsa_mutex);
+
+ if (!svm->sev_es.snp_ap_waiting_for_reset)
+ return;
+
+ svm->sev_es.snp_ap_waiting_for_reset = false;
+
+ /* Mark the vCPU as offline and not runnable */
+ vcpu->arch.pv.pv_unhalted = false;
+ kvm_set_mp_state(vcpu, KVM_MP_STATE_HALTED);
+
+ gpa = svm->sev_es.snp_pending_vmsa_gpa;
+ svm->sev_es.snp_pending_vmsa_gpa = INVALID_PAGE;
+
+ sev_snp_reload_vmsa(vcpu, gpa);
+}
+
static int sev_snp_ap_creation(struct vcpu_svm *svm)
{
struct kvm_sev_info *sev = to_kvm_sev_info(svm->vcpu.kvm);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 43/83] KVM: SEV: Mark vCPU RUNNABLE after AP_CREATE, even if VMSA is unusable
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (41 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 42/83] KVM: SEV: Extract loading of guest-provided VMSA to a separate helper Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 44/83] KVM: SEV: Wire up kvm_x86_ops.gmem_xxx() if and only if CONFIG_KVM_AMD_SEV=y Greg Kroah-Hartman
` (48 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Michael Roth, Sean Christopherson
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sean Christopherson <seanjc@google.com>
commit 98ade8c48c28c227fe2e80e545ff0c57cd4712a3 upstream.
Always mark the vCPU as RUNNABLE after responding to AP_CREATE, even if the
guest-specified VMSA is unusable, e.g. isn't backed by a memslot or doesn't
have a backing guest_memfd page. If the VMSA is unusable, leaving the vCPU
in a non-running state will effectively hang the vCPU instead of reporting
an error to userspace. This will also allow retrying the VMSA load in the
future, to fix a bug where KVM doesn't honor guest_memfd invalidation
events, e.g. if AP_CREATION races with PUNCH_HOLE.
Cc: stable@vger.kernel.org # 6.12.x
Reviewed-by: Michael Roth <michael.roth@amd.com>
Link: https://patch.msgid.link/20260709204948.1988414-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/svm/sev.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -4062,9 +4062,6 @@ static void sev_snp_reload_vmsa(struct k
svm->sev_es.snp_guest_vmsa_gpa = gpa;
svm->vmcb->control.vmsa_pa = pfn_to_hpa(pfn);
- /* Mark the vCPU as runnable */
- kvm_set_mp_state(vcpu, KVM_MP_STATE_RUNNABLE);
-
/*
* gmem pages aren't currently migratable, but if this ever changes
* then care should be taken to ensure svm->sev_es.vmsa is pinned
@@ -4096,6 +4093,15 @@ static void sev_snp_init_protected_guest
svm->sev_es.snp_pending_vmsa_gpa = INVALID_PAGE;
sev_snp_reload_vmsa(vcpu, gpa);
+
+ /*
+ * Mark the vCPU as runnable for CREATE requests, indicated by a valid
+ * VMSA GPA, even if installing the VMSA failed, so that KVM_RUN will
+ * fail instead of blocking indefinitely and hanging the vCPU, e.g. if
+ * the backing guest_memfd page is unavailable.
+ */
+ if (VALID_PAGE(gpa))
+ kvm_set_mp_state(vcpu, KVM_MP_STATE_RUNNABLE);
}
static int sev_snp_ap_creation(struct vcpu_svm *svm)
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 44/83] KVM: SEV: Wire up kvm_x86_ops.gmem_xxx() if and only if CONFIG_KVM_AMD_SEV=y
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (42 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 43/83] KVM: SEV: Mark vCPU RUNNABLE after AP_CREATE, even if VMSA is unusable Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 45/83] tls: device: fix out-of-bounds write in tls_append_frag() Greg Kroah-Hartman
` (47 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Ackerley Tng, Sean Christopherson
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sean Christopherson <seanjc@google.com>
commit 01a96ff30dde5127c37497f1e098e639e7ae152f upstream.
Wire up the SEV-SNP guest_memfd kvm_x86_ops hooks if and only if SEV is
actually enabled, and drop the now-unnecessary stubs. Leaving the hooks
NULL allows the static call infrastructure to elide the CALL+RET, and more
importantly, referencing the hooks if and only if SEV support is enabled
will allow conditionally definining the hooks using their corresponding
HAVE_KVM_ARCH_GMEM_XXX Kconfig.
No functional change intended.
Cc: stable@vger.kernel.org # 6.12.x
Reviewed-by: Ackerley Tng <ackerleytng@google.com>
Link: https://patch.msgid.link/20260709204948.1988414-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kvm/svm/svm.c | 8 ++++----
arch/x86/kvm/svm/svm.h | 10 ----------
2 files changed, 4 insertions(+), 14 deletions(-)
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5262,6 +5262,10 @@ struct kvm_x86_ops svm_x86_ops __initdat
.vm_copy_enc_context_from = sev_vm_copy_enc_context_from,
.vm_move_enc_context_from = sev_vm_move_enc_context_from,
+
+ .gmem_prepare = sev_gmem_prepare,
+ .gmem_invalidate = sev_gmem_invalidate,
+ .gmem_max_mapping_level = sev_gmem_max_mapping_level,
#endif
.check_emulate_instruction = svm_check_emulate_instruction,
@@ -5273,10 +5277,6 @@ struct kvm_x86_ops svm_x86_ops __initdat
.vcpu_deliver_sipi_vector = svm_vcpu_deliver_sipi_vector,
.vcpu_get_apicv_inhibit_reasons = avic_vcpu_get_apicv_inhibit_reasons,
.alloc_apic_backing_page = svm_alloc_apic_backing_page,
-
- .gmem_prepare = sev_gmem_prepare,
- .gmem_invalidate = sev_gmem_invalidate,
- .gmem_max_mapping_level = sev_gmem_max_mapping_level,
};
/*
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -906,16 +906,6 @@ static inline int sev_cpu_init(struct sv
static inline int sev_dev_get_attr(u32 group, u64 attr, u64 *val) { return -ENXIO; }
#define max_sev_asid 0
static inline void sev_handle_rmp_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u64 error_code) {}
-static inline int sev_gmem_prepare(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn, int max_order)
-{
- return 0;
-}
-static inline void sev_gmem_invalidate(kvm_pfn_t start, kvm_pfn_t end) {}
-static inline int sev_gmem_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn, bool is_private)
-{
- return 0;
-}
-
static inline struct vmcb_save_area *sev_decrypt_vmsa(struct kvm_vcpu *vcpu)
{
return NULL;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 45/83] tls: device: fix out-of-bounds write in tls_append_frag()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (43 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 44/83] KVM: SEV: Wire up kvm_x86_ops.gmem_xxx() if and only if CONFIG_KVM_AMD_SEV=y Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 46/83] gtp: serialize PDP context updates Greg Kroah-Hartman
` (46 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jiayuan Chen, Paolo Abeni
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiayuan Chen <jiayuan.chen@linux.dev>
commit b17cf742eaad70ae29ac558cefb3aa9bbeea03d4 upstream.
Found with syzkaller and a local syzbot instance running on top of a
netdevsim TLS offload emulation; tls_device.c is otherwise only reachable
on a machine with a NIC that implements the offload.
tls_push_data() only checks whether the open record still has room for
another frag at the bottom of its loop, and the MSG_MORE early break
skips that check. The record survives to the next syscall with the frag
count it already had, and tls_append_frag() does not check either, so
with TLS_TX_ZEROCOPY_RO every splice(SPLICE_F_MORE) of a byte or two adds
a non-coalescing pipe page and num_frags walks off the end of
tls_record_info.frags[MAX_SKB_FRAGS]. Once the record is pushed,
tls_push_record() runs the same index over sg_tx_data[MAX_SKB_FRAGS] and
the sg_set_page() writes land on the destruct_work that follows it, which
the workqueue then calls.
The byte limit is fine because copy drops to 0 and the loop falls through
to the same check; the frag count has no such feedback.
Push the record rather than keep a full one open, which is what a plain
TCP socket does - tcp_sendmsg_locked() uses tcp_mark_push() and
new_segment in both the copy and the MSG_SPLICE_PAGES paths, and tls_sw
already sets full_record when the sk_msg ring fills up, MSG_MORE or not.
BUG: KASAN: slab-out-of-bounds in tls_append_frag ( net/tls/tls_device.c:269)
Write of size 8 at addr ffff8881104d1530 by task tls_oob/450
CPU: 2 UID: 0 PID: 450 Comm: tls_oob Not tainted 7.2.0-rc7+ #329 PREEMPT
Call Trace:
<TASK>
dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
print_report (mm/kasan/report.c:378 mm/kasan/report.c:482)
kasan_report (mm/kasan/report.c:595)
tls_append_frag (net/tls/tls_device.c:269)
tls_push_data (net/tls/tls_device.c:518)
tls_device_sendmsg (net/tls/tls_device.c:583)
inet_sendmsg (net/ipv4/af_inet.c:865)
sock_sendmsg (net/socket.c:775 net/socket.c:790 net/socket.c:813)
splice_to_socket (fs/splice.c:884)
do_splice (fs/splice.c:936 fs/splice.c:1349)
__do_splice (fs/splice.c:1431)
__x64_sys_splice (fs/splice.c:1634 fs/splice.c:1616)
do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
</TASK>
and, once the record is pushed:
UBSAN: array-index-out-of-bounds in net/tls/tls_device.c:300:24
index 18 is out of range for type 'skb_frag_t [17]'
UBSAN: array-index-out-of-bounds in net/tls/tls_device.c:301:41
index 18 is out of range for type 'scatterlist [17]'
UBSAN: array-index-out-of-bounds in net/tls/tls_device.c:302:39
index 18 is out of range for type 'scatterlist [17]'
UBSAN: array-index-out-of-bounds in net/tls/tls_device.c:307:38
index 26 is out of range for type 'scatterlist [17]'
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle page fault for address: ffffea000411a680
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0011) - permissions violation
Oops: Oops: 0011 [#1] SMP KASAN PTI
Workqueue: ktls_device_destruct 0xffffea000411a680
RIP: 0010:0xffffea000411a680
Call Trace:
<TASK>
worker_thread (kernel/workqueue.c:3405 kernel/workqueue.c:3486)
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)
</TASK>
Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure")
Cc: stable@vger.kernel.org
Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Link: https://patch.msgid.link/20260823084758.20936-1-jiayuan.chen@linux.dev
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/tls/tls_device.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -530,7 +530,8 @@ handle_error:
if (!size) {
last_record:
tls_push_record_flags = flags;
- if (flags & MSG_MORE) {
+ if ((flags & MSG_MORE) &&
+ record->num_frags < MAX_SKB_FRAGS - 1) {
more = true;
break;
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 46/83] gtp: serialize PDP context updates
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (44 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 45/83] tls: device: fix out-of-bounds write in tls_append_frag() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 47/83] x86/CPU/AMD: Carve out a Zen5 models range Greg Kroah-Hartman
` (45 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Qing Ming, Jakub Kicinski
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qing Ming <a0yami@mailbox.org>
commit 498386b6d402737db1e2eeed4c385acbf0ef9e34 upstream.
PDP contexts can be deleted through GTP_CMD_DELPDP or while the GTP
network device is being unregistered. The latter is serialized by RTNL,
but the generic-netlink delete path only holds RCU.
Running both paths concurrently can therefore make both paths delete the
same PDP context. The issue was found through static analysis and
reproduced on a KASAN-enabled kernel by a simple two-thread program
racing GTP_CMD_DELPDP against RTM_DELLINK:
Oops: general protection fault, probably for non-canonical address
KASAN: maybe wild-memory-access in range
[0xdead000000000120-0xdead000000000127]
RIP: gtp_genl_del_pdp+0x1c1/0x420 [gtp]
RBP: dead000000000122
The second deletion dereferenced the poisoned hlist pprev pointer.
Serialize gtp_pdp_add(), gtp_genl_del_pdp(), and gtp_dellink() with a
shared mutex. Keep the mutex held until the final use of a PDP context in
the NEWPDP path, and keep the RCU read-side section around the complete
PDP context use in the DELPDP path.
Fixes: 459aa660eb1d ("gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)")
Cc: stable@vger.kernel.org
Signed-off-by: Qing Ming <a0yami@mailbox.org>
Link: https://patch.msgid.link/20260818150000.7670-1-a0yami@mailbox.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/gtp.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -12,6 +12,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/skbuff.h>
#include <linux/udp.h>
#include <linux/rculist.h>
@@ -108,6 +109,7 @@ struct gtp_net {
};
static u32 gtp_h_initval;
+static DEFINE_MUTEX(gtp_pdp_lock);
static struct genl_family gtp_genl_family;
@@ -151,7 +153,8 @@ static struct pdp_ctx *gtp0_pdp_find(str
head = >p->tid_hash[gtp0_hashfn(tid) % gtp->hash_size];
- hlist_for_each_entry_rcu(pdp, head, hlist_tid) {
+ hlist_for_each_entry_rcu(pdp, head, hlist_tid,
+ lockdep_is_held(>p_pdp_lock)) {
if (pdp->af == family &&
pdp->gtp_version == GTP_V0 &&
pdp->u.v0.tid == tid)
@@ -168,7 +171,8 @@ static struct pdp_ctx *gtp1_pdp_find(str
head = >p->tid_hash[gtp1u_hashfn(tid) % gtp->hash_size];
- hlist_for_each_entry_rcu(pdp, head, hlist_tid) {
+ hlist_for_each_entry_rcu(pdp, head, hlist_tid,
+ lockdep_is_held(>p_pdp_lock)) {
if (pdp->af == family &&
pdp->gtp_version == GTP_V1 &&
pdp->u.v1.i_tei == tid)
@@ -185,7 +189,8 @@ static struct pdp_ctx *ipv4_pdp_find(str
head = >p->addr_hash[ipv4_hashfn(ms_addr) % gtp->hash_size];
- hlist_for_each_entry_rcu(pdp, head, hlist_addr) {
+ hlist_for_each_entry_rcu(pdp, head, hlist_addr,
+ lockdep_is_held(>p_pdp_lock)) {
if (pdp->af == AF_INET &&
pdp->ms.addr.s_addr == ms_addr)
return pdp;
@@ -220,7 +225,8 @@ static struct pdp_ctx *ipv6_pdp_find(str
head = >p->addr_hash[ipv6_hashfn(ms_addr) % gtp->hash_size];
- hlist_for_each_entry_rcu(pdp, head, hlist_addr) {
+ hlist_for_each_entry_rcu(pdp, head, hlist_addr,
+ lockdep_is_held(>p_pdp_lock)) {
if (pdp->af == AF_INET6 &&
ipv6_pdp_addr_equal(&pdp->ms.addr6, ms_addr))
return pdp;
@@ -1555,9 +1561,11 @@ static void gtp_dellink(struct net_devic
struct pdp_ctx *pctx;
int i;
+ mutex_lock(>p_pdp_lock);
for (i = 0; i < gtp->hash_size; i++)
hlist_for_each_entry_safe(pctx, next, >p->tid_hash[i], hlist_tid)
pdp_context_delete(pctx);
+ mutex_unlock(>p_pdp_lock);
list_del(>p->list);
unregister_netdevice_queue(dev, head);
@@ -2053,6 +2061,7 @@ static int gtp_genl_new_pdp(struct sk_bu
goto out_unlock;
}
+ mutex_lock(>p_pdp_lock);
pctx = gtp_pdp_add(gtp, sk, info);
if (IS_ERR(pctx)) {
err = PTR_ERR(pctx);
@@ -2060,6 +2069,7 @@ static int gtp_genl_new_pdp(struct sk_bu
gtp_tunnel_notify(pctx, GTP_CMD_NEWPDP, GFP_KERNEL);
err = 0;
}
+ mutex_unlock(>p_pdp_lock);
out_unlock:
rtnl_unlock();
@@ -2134,6 +2144,8 @@ static int gtp_genl_del_pdp(struct sk_bu
if (!info->attrs[GTPA_VERSION])
return -EINVAL;
+ mutex_lock(>p_pdp_lock);
+
rcu_read_lock();
pctx = gtp_find_pdp(sock_net(skb->sk), info->attrs);
@@ -2154,6 +2166,7 @@ static int gtp_genl_del_pdp(struct sk_bu
out_unlock:
rcu_read_unlock();
+ mutex_unlock(>p_pdp_lock);
return err;
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 47/83] x86/CPU/AMD: Carve out a Zen5 models range
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (45 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 46/83] gtp: serialize PDP context updates Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 48/83] net/tcp: fix TCP-AO key deletion in VRFs Greg Kroah-Hartman
` (44 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Pratik Vishwakarma,
Borislav Petkov (AMD), stable
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pratik Vishwakarma <Pratik.Vishwakarma@amd.com>
commit 52075128273ace53e6254e37899a47d40d4baf45 upstream.
Family 0x1a, model 0xd0..0xd7 belongs to the Zen5 generation. Carve it
out from the larger, Zen6 range where former doesn't belong.
[ bp: Rewrite commit message, add tags. ]
Fixes: b5f53e6d3d32 ("x86/CPU/AMD: Add more Zen6 models")
Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma@amd.com>
[ bp: Backport only the Zen5 bits. ]
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Link: https://patch.msgid.link/20260729055459.15904-1-Pratik.Vishwakarma@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/cpu/amd.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -513,6 +513,7 @@ static void bsp_init_amd(struct cpuinfo_
case 0x00 ... 0x2f:
case 0x40 ... 0x4f:
case 0x60 ... 0x7f:
+ case 0xd0 ... 0xd7:
setup_force_cpu_cap(X86_FEATURE_ZEN5);
break;
case 0x50 ... 0x5f:
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 48/83] net/tcp: fix TCP-AO key deletion in VRFs
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (46 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 47/83] x86/CPU/AMD: Carve out a Zen5 models range Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 49/83] tcp: fix AO info use-after-free in tcp_ao_connect_init() Greg Kroah-Hartman
` (43 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Rastislav Szabo, David Ahern,
Dmitry Safonov, Paolo Abeni
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Rastislav Szabo <rastislav.szabo@isovalent.com>
commit 94ad9e114a1c7b16ea418c1456ac3835e038ab3f upstream.
TCP-AO keys with TCP_AO_KEYF_IFINDEX store the VRF L3 interface index in
l3index. tcp_ao_del_cmd() validates the supplied ifindex, but does not
assign it to its local l3index before matching keys.
As a result, deleting a key scoped to a non-default VRF always fails with
ENOENT because it is matched against l3index 0.
Fixes: 248411b8cb89 ("net/tcp: Wire up l3index to TCP-AO")
Cc: stable@vger.kernel.org
Signed-off-by: Rastislav Szabo <rastislav.szabo@isovalent.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Acked-by: Dmitry Safonov <0x7f454c46@gmail.com>
Link: https://patch.msgid.link/20260822201119.272269-1-rastislav.szabo@isovalent.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/tcp_ao.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/ipv4/tcp_ao.c
+++ b/net/ipv4/tcp_ao.c
@@ -1854,6 +1854,9 @@ static int tcp_ao_del_cmd(struct sock *s
if (cmd.ifindex && !(cmd.keyflags & TCP_AO_KEYF_IFINDEX))
return -EINVAL;
+ if (cmd.keyflags & TCP_AO_KEYF_IFINDEX)
+ l3index = cmd.ifindex;
+
ao_info = setsockopt_ao_info(sk);
if (IS_ERR(ao_info))
return PTR_ERR(ao_info);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 49/83] tcp: fix AO info use-after-free in tcp_ao_connect_init()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (47 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 48/83] net/tcp: fix TCP-AO key deletion in VRFs Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 50/83] net/tcp-ao: fix use-after-free of current_key on reconnect to another peer Greg Kroah-Hartman
` (42 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Qing Ming, Eric Dumazet, Paolo Abeni
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Qing Ming <a0yami@mailbox.org>
commit ea30dc5267e367b8a5e1e06cc074f813bcbf18b2 upstream.
tcp_v4_connect() adds a SYN-SENT socket to the ehash before calling
tcp_connect(). If TCP-AO is configured, tcp_connect() first verifies that
a key matches the peer and the bound device's current L3 master.
tcp_ao_connect_init() later resolves the L3 master again and removes keys
which do not match it.
The socket lock does not stabilize the bound device's VRF membership.
Detaching the device from its VRF between the initial validation and the
L3-master calculation in tcp_ao_connect_init() can therefore make the
validation succeed while initialization observes the default L3 domain and
removes the only key. The subsequent AO lookup then fails, so the no-key
path clears tp->ao_info and frees it directly.
The receive path can find the socket in the ehash and load tp->ao_info
under RCU before acquiring the socket lock. A reader which loaded the old
pointer can thus continue into tcp_inbound_ao_hash() after the direct free.
The issue was found during a static audit of TCP-AO object lifetime. An
unprivileged reproducer in self-created user and network namespaces raced
connect() with detaching a veth from its VRF while sending TCP-AO segments.
It triggered the same KASAN report on two fresh boots:
BUG: KASAN: slab-use-after-free in tcp_inbound_ao_hash+0x585/0x19f0
Write of size 8 at addr ffff88800bf88128 by task tcp_ao_vrf_race/232
Call Trace:
tcp_inbound_ao_hash+0x585/0x19f0
tcp_inbound_hash+0x677/0xa80
tcp_v4_rcv+0x1c3e/0x3ab0
Allocated by task 235:
tcp_ao_alloc_info+0x43/0xf0
tcp_ao_add_cmd+0xdf7/0x13b0
do_tcp_setsockopt+0x168c/0x2640
Freed by task 235:
kfree+0x1b8/0x550
tcp_connect+0x252/0x4f00
tcp_v4_connect+0x1114/0x1720
The bad address is 40 bytes inside the freed 128-byte object, matching the
tcp_ao_info counters.key_not_found field. The two runs used 1000 attempts
each, reached the no-key path 366 and 411 times, and produced one and two
KASAN reports respectively. With this change, the same reproducer reached
the no-key path 366 times in 1000 attempts without a KASAN report or oops.
Use tcp_ao_destroy_sock() for the no-key path. It unpublishes the AO info,
updates the socket memory and static-key accounting, and defers the free
until after an RCU grace period.
Also drop the WARN_ON_ONCE() and its stale comment. The VRF detach race
makes the no-key state reachable during normal operation, so it is a
handled condition rather than an impossible assertion. On panic_on_warn
kernels the WARN would turn this handled race into a kernel panic.
Fixes: 248411b8cb89 ("net/tcp: Wire up l3index to TCP-AO")
Cc: stable@vger.kernel.org
Assisted-by: Codex:gpt-5
Signed-off-by: Qing Ming <a0yami@mailbox.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260825072033.6921-1-a0yami@mailbox.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/tcp_ao.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/net/ipv4/tcp_ao.c
+++ b/net/ipv4/tcp_ao.c
@@ -1147,12 +1147,7 @@ void tcp_ao_connect_init(struct sock *sk
ao_info->lisn = htonl(tp->write_seq);
ao_info->snd_sne = 0;
} else {
- /* Can't happen: tcp_connect() verifies that there's
- * at least one tcp-ao key that matches the remote peer.
- */
- WARN_ON_ONCE(1);
- rcu_assign_pointer(tp->ao_info, NULL);
- kfree(ao_info);
+ tcp_ao_destroy_sock(sk, false);
}
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 50/83] net/tcp-ao: fix use-after-free of current_key on reconnect to another peer
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (48 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 49/83] tcp: fix AO info use-after-free in tcp_ao_connect_init() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 51/83] xfrm: espintcp: fix UAF during close Greg Kroah-Hartman
` (41 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Hyunwoo Kim, Simon Horman,
Paolo Abeni, Jakub Kicinski
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hyunwoo Kim <imv4bel@gmail.com>
commit da4471557f279d0f56605158a625bb6e49ef7d41 upstream.
tcp_inbound_ao_hash() is called before bh_lock_sock_nested() is taken,
with only rcu_read_lock() held. On the fast path for established
sockets, if the rnext_keyid sent by the peer differs from
current_key->sndid, the key the peer asked for is looked up and stored
in current_key. The lookup is inside the RCU read side, but current_key
outlives it.
When the socket is disconnected and connect() is called again for
another peer, tcp_ao_connect_init() unlinks every key that does not
match the new peer and frees it with call_rcu(). If current_key points
at such a key, it is cleared to NULL.
The fast path reads sk_state only once on entry, so a softirq that got
into it while the socket was still established can update current_key
after that loop has already run. The update is inside the RCU read side,
so it comes before the call_rcu() callback, and once the callback frees
the key, current_key is left pointing at freed memory.
The next transmission picks that pointer up in tcp_get_current_key().
tcp_ao_transmit_skb() then reads the traffic key from the freed object,
which is the use-after-free.
Wait for one grace period before unlinking, and only if a key is going
to be removed. By the time tcp_connect() runs the socket is already in
TCP_SYN_SENT, and TCP_AO_ESTABLISHED does not contain TCPF_SYN_SENT, so
a softirq entering after the wait cannot reach the fast path, and the
ones already in it have finished. The existing NULL handling in the loop
is then enough.
Fixes: 0a3a809089eb ("net/tcp: Verify inbound TCP-AO signed segments")
Cc: stable@vger.kernel.org
Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/aoIriv3pHDgII2YR@v4bel
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv4/tcp_ao.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/net/ipv4/tcp_ao.c
+++ b/net/ipv4/tcp_ao.c
@@ -1120,6 +1120,15 @@ void tcp_ao_connect_init(struct sock *sk
l3index = l3mdev_master_ifindex_by_index(sock_net(sk),
sk->sk_bound_dev_if);
+ hlist_for_each_entry(key, &ao_info->head, node) {
+ if (tcp_ao_key_cmp(key, l3index, addr, key->prefixlen,
+ family, -1, -1)) {
+ /* pairs with tcp_inbound_ao_hash() */
+ synchronize_rcu();
+ break;
+ }
+ }
+
hlist_for_each_entry_safe(key, next, &ao_info->head, node) {
if (!tcp_ao_key_cmp(key, l3index, addr, key->prefixlen, family, -1, -1))
continue;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 51/83] xfrm: espintcp: fix UAF during close
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (49 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 50/83] net/tcp-ao: fix use-after-free of current_key on reconnect to another peer Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 52/83] xfrm: drop ESP-in-TCP packets with no ingress device Greg Kroah-Hartman
` (40 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, zdi-disclosures, Sabrina Dubroca,
Breno Leitao, Steffen Klassert
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sabrina Dubroca <sd@queasysnail.net>
commit deb232e884877bf10b4ce2580909eedec986c284 upstream.
ZDI reported and analyzed a race condition during close for espintcp
sockets:
espintcp_close() frees emsg->skb via kfree_skb() without holding
any socket lock. Concurrently, the xfrm_trans_reinject work queue
invokes esp_output_tcp_finish() -> espintcp_push_skb() ->
espintcp_push_msgs() -> skb_send_sock_locked(), which reads the
same skb as a data source.
Fix this by adding a synchronize_rcu() call after resetting sk_prot,
since esp_output_tcp_finish() runs under RCU and won't use a socket
with sk_prot == &tcp_prot. Simply taking the socket lock in
espintcp_close() could lead to leaks, if esp_output_tcp_finish()
re-adds an skb in the slot we just freed. After this, the existing
barrier() is no longer needed.
Cc: stable@vger.kernel.org
Fixes: e27cca96cd68 ("xfrm: add espintcp (RFC 8229)")
Reported-by: zdi-disclosures@trendmicro.com
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/xfrm/espintcp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/xfrm/espintcp.c
+++ b/net/xfrm/espintcp.c
@@ -518,7 +518,8 @@ static void espintcp_close(struct sock *
strp_stop(&ctx->strp);
sk->sk_prot = &tcp_prot;
- barrier();
+
+ synchronize_rcu();
disable_work_sync(&ctx->work);
strp_done(&ctx->strp);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 52/83] xfrm: drop ESP-in-TCP packets with no ingress device
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (50 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 51/83] xfrm: espintcp: fix UAF during close Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 53/83] xfrm: avoid lock inversion in nat keepalive work Greg Kroah-Hartman
` (39 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zhiling Zou, Ren Wei,
Steffen Klassert
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhiling Zou <roxy520tt@gmail.com>
commit e1d7c5ac1c246ce5775f604515de0a59fbf2116e upstream.
ESP-in-TCP receives records through the TCP strparser. handle_esp()
restores skb->dev from the saved skb_iif before passing the packet into
the XFRM input path.
Queued TCP data can be processed after the original ingress device has
been removed, for example during veth or net namespace teardown. In that
case dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input
paths both expect skb->dev to be valid while building the route lookup,
so queued ESP-in-TCP data can dereference a NULL device.
Drop the packet if the saved ingress device can no longer be resolved.
Such a packet can no longer be routed through the normal XFRM receive
path, and this preserves the existing behaviour for packets whose ingress
device still exists.
Fixes: e27cca96cd68 ("xfrm: add espintcp (RFC 8229)")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Signed-off-by: Zhiling Zou <roxy520tt@gmail.com>
Assisted-by: Codex:gpt-5.4
Reviewed-by: Ren Wei <enjou1224z@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/xfrm/espintcp.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/net/xfrm/espintcp.c
+++ b/net/xfrm/espintcp.c
@@ -40,6 +40,11 @@ static void handle_esp(struct sk_buff *s
rcu_read_lock();
skb->dev = dev_get_by_index_rcu(sock_net(sk), skb->skb_iif);
+ if (!skb->dev) {
+ XFRM_INC_STATS(sock_net(sk), LINUX_MIB_XFRMINERROR);
+ kfree_skb(skb);
+ goto out;
+ }
local_bh_disable();
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6)
@@ -48,6 +53,7 @@ static void handle_esp(struct sk_buff *s
#endif
xfrm4_rcv_encap(skb, IPPROTO_ESP, 0, TCP_ENCAP_ESPINTCP);
local_bh_enable();
+out:
rcu_read_unlock();
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 53/83] xfrm: avoid lock inversion in nat keepalive work
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (51 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 52/83] xfrm: drop ESP-in-TCP packets with no ingress device Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 54/83] xfrm: ah6: validate routing header segments_left Greg Kroah-Hartman
` (38 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zihan Xi, Ren Wei,
Steffen Klassert
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <xizh2024@lzu.edu.cn>
commit 763fe700b7c58ad64fe5202c5638848244dd4127 upstream.
nat_keepalive_work() walks the state table while xfrm_state_walk()
holds net->xfrm.xfrm_state_lock. Its callback then acquires x->lock,
which conflicts with the delete path taking the same locks in reverse
order via xfrm_state_delete() and __xfrm_state_delete(). This creates
an AB-BA deadlock that is reported by lockdep when a NAT keepalive
worker races with SA deletion.
Fix this by splitting the keepalive walk into two phases. First,
collect the candidate states while the walk holds xfrm_state_lock and
take a reference on each state. Then, after the walk completes, process
each collected state and acquire x->lock without nesting it under
xfrm_state_lock.
Fixes: f531d13bdfe3 ("xfrm: support sending NAT keepalives in ESP in UDP states")
Cc: stable@vger.kernel.org
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: Codex:gpt-5.4
Signed-off-by: Zihan Xi <xizh2024@lzu.edu.cn>
Signed-off-by: Ren Wei <enjou1224z@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/xfrm/xfrm_nat_keepalive.c | 57 +++++++++++++++++++++++++++++++++++-------
1 file changed, 48 insertions(+), 9 deletions(-)
--- a/net/xfrm/xfrm_nat_keepalive.c
+++ b/net/xfrm/xfrm_nat_keepalive.c
@@ -156,24 +156,51 @@ static void nat_keepalive_send(struct na
}
struct nat_keepalive_work_ctx {
+ struct list_head states;
time64_t next_run;
time64_t now;
};
-static int nat_keepalive_work_single(struct xfrm_state *x, int count, void *ptr)
+struct nat_keepalive_state {
+ struct list_head list;
+ struct xfrm_state *x;
+};
+
+static int nat_keepalive_work_collect(struct xfrm_state *x, int count, void *ptr)
{
struct nat_keepalive_work_ctx *ctx = ptr;
+ struct nat_keepalive_state *state;
+
+ if (!READ_ONCE(x->nat_keepalive_interval))
+ return 0;
+
+ state = kmalloc_obj(*state, GFP_ATOMIC);
+ if (!state)
+ return -ENOMEM;
+
+ xfrm_state_hold(x);
+ state->x = x;
+ list_add_tail(&state->list, &ctx->states);
+ return 0;
+}
+
+static void nat_keepalive_work_single(struct xfrm_state *x,
+ struct nat_keepalive_work_ctx *ctx)
+{
bool send_keepalive = false;
struct nat_keepalive ka;
- time64_t next_run;
+ time64_t next_run = 0;
u32 interval;
int delta;
+ spin_lock_bh(&x->lock);
+
+ if (x->km.state == XFRM_STATE_DEAD)
+ goto out;
+
interval = x->nat_keepalive_interval;
if (!interval)
- return 0;
-
- spin_lock(&x->lock);
+ goto out;
delta = (int)(ctx->now - x->lastused);
if (delta < interval) {
@@ -187,29 +214,41 @@ static int nat_keepalive_work_single(str
send_keepalive = true;
}
- spin_unlock(&x->lock);
+out:
+ spin_unlock_bh(&x->lock);
if (send_keepalive)
nat_keepalive_send(&ka);
- if (!ctx->next_run || next_run < ctx->next_run)
+ if (next_run && (!ctx->next_run || next_run < ctx->next_run))
ctx->next_run = next_run;
- return 0;
}
static void nat_keepalive_work(struct work_struct *work)
{
+ struct nat_keepalive_state *state, *tmp;
struct nat_keepalive_work_ctx ctx;
struct xfrm_state_walk walk;
struct net *net;
+ int err;
+ INIT_LIST_HEAD(&ctx.states);
ctx.next_run = 0;
ctx.now = ktime_get_real_seconds();
net = container_of(work, struct net, xfrm.nat_keepalive_work.work);
xfrm_state_walk_init(&walk, IPPROTO_ESP, NULL);
- xfrm_state_walk(net, &walk, nat_keepalive_work_single, &ctx);
+ err = xfrm_state_walk(net, &walk, nat_keepalive_work_collect, &ctx);
xfrm_state_walk_done(&walk, net);
+ list_for_each_entry_safe(state, tmp, &ctx.states, list) {
+ nat_keepalive_work_single(state->x, &ctx);
+ xfrm_state_put(state->x);
+ kfree(state);
+ }
+ if (err == -ENOMEM) {
+ schedule_delayed_work(&net->xfrm.nat_keepalive_work, 0);
+ return;
+ }
if (ctx.next_run)
schedule_delayed_work(&net->xfrm.nat_keepalive_work,
(ctx.next_run - ctx.now) * HZ);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 54/83] xfrm: ah6: validate routing header segments_left
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (52 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 53/83] xfrm: avoid lock inversion in nat keepalive work Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 55/83] xfrm: fix xfrm_state_construct() auth-trunc leak Greg Kroah-Hartman
` (37 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Asim Viladi Oglu Manizada,
Steffen Klassert
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Asim Viladi Oglu Manizada <manizada@pm.me>
commit 7bad4bda74dc4713f398d3b7624ff05478e3a568 upstream.
AH6 rearranges routing-header addresses before computing or verifying the
ICV. ipv6_rearrange_rthdr() assumes that segments_left is not larger than
the number of addresses described by the routing header's hdrlen field.
That assumption does not hold for raw IPv6 HDRINCL packets. A packet with
hdrlen equal to 2 describes one address, but can carry an arbitrary
segments_left value. With segments_left equal to 255, the function moves
its address pointer 4,064 bytes backwards and passes a 4,064-byte length to
memmove(), resulting in an out-of-bounds access.
Validate the invariant locally before modifying the routing header or
performing any address-pointer arithmetic, and propagate malformed-header
errors to the existing AH6 input and output error paths.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Assisted-by: avom-custom-harness:gpt-5.5-qwen3.6-mod-mix
Signed-off-by: Asim Viladi Oglu Manizada <manizada@pm.me>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/ah6.c | 29 ++++++++++++++++++-----------
1 file changed, 18 insertions(+), 11 deletions(-)
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -232,26 +232,28 @@ static void ipv6_rearrange_destopt(struc
* Rearrange the destination address in @iph and the addresses in @rthdr
* so that they appear in the order they will at the final destination.
* See Appendix A2 of RFC 2402 for details.
+ *
+ * Return: 0 on success, -EINVAL if segments_left exceeds the number of
+ * addresses described by hdrlen.
*/
-static void ipv6_rearrange_rthdr(struct ipv6hdr *iph, struct ipv6_rt_hdr *rthdr)
+static int ipv6_rearrange_rthdr(struct ipv6hdr *iph, struct ipv6_rt_hdr *rthdr)
{
- int segments, segments_left;
+ unsigned int segments, segments_left;
struct in6_addr *addrs;
struct in6_addr final_addr;
segments_left = rthdr->segments_left;
if (segments_left == 0)
- return;
- rthdr->segments_left = 0;
+ return 0;
- /* The value of rthdr->hdrlen has been verified either by the system
- * call if it is locally generated, or by ipv6_rthdr_rcv() for incoming
- * packets. So we can assume that it is even and that segments is
- * greater than or equal to segments_left.
- *
- * For the same reason we can assume that this option is of type 0.
+ /* Raw locally generated packets can reach AH6 without the invariant
+ * required by the rt0-style address rearrangement below.
*/
segments = rthdr->hdrlen >> 1;
+ if (segments_left > segments)
+ return -EINVAL;
+
+ rthdr->segments_left = 0;
addrs = ((struct rt0_hdr *)rthdr)->addr;
final_addr = addrs[segments - 1];
@@ -261,6 +263,8 @@ static void ipv6_rearrange_rthdr(struct
addrs[0] = iph->daddr;
iph->daddr = final_addr;
+
+ return 0;
}
static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len, int dir)
@@ -273,6 +277,7 @@ static int ipv6_clear_mutable_options(st
} exthdr = { .iph = iph };
char *end = exthdr.raw + len;
int nexthdr = iph->nexthdr;
+ int err;
exthdr.iph++;
@@ -292,7 +297,9 @@ static int ipv6_clear_mutable_options(st
break;
case NEXTHDR_ROUTING:
- ipv6_rearrange_rthdr(iph, exthdr.rth);
+ err = ipv6_rearrange_rthdr(iph, exthdr.rth);
+ if (err)
+ return err;
break;
default:
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 55/83] xfrm: fix xfrm_state_construct() auth-trunc leak
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (53 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 54/83] xfrm: ah6: validate routing header segments_left Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 56/83] xfrm: bound nat keepalive state collection Greg Kroah-Hartman
` (36 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Vega, Zihan Xi, Ren Wei,
Steffen Klassert
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <zihanx@nebusec.ai>
commit c12cbf56320fb633484ee0ca1fb7d68d6b64b213 upstream.
attach_auth_trunc() can allocate x->aalg while leaving
x->props.aalgo at zero when the selected auth algorithm has no
sadb_alg_id. One real case is cmac(aes).
xfrm_state_construct() then treats !x->props.aalgo as "no auth
algorithm attached yet" and calls attach_auth(). That overwrites
x->aalg and loses the first allocation. Any later failure or teardown
only frees the replacement pointer.
Check whether x->aalg is already attached instead of inferring that
state from x->props.aalgo.
Fixes: 4447bb33f094 ("xfrm: Store aalg in xfrm_state with a user specified truncation length")
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>
Signed-off-by: Ren Wei <enjou1224z@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/xfrm/xfrm_user.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -916,7 +916,7 @@ static struct xfrm_state *xfrm_state_con
if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
attrs[XFRMA_ALG_AUTH_TRUNC], extack)))
goto error;
- if (!x->props.aalgo) {
+ if (!x->aalg) {
if ((err = attach_auth(&x->aalg, &x->props.aalgo,
attrs[XFRMA_ALG_AUTH], extack)))
goto error;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 56/83] xfrm: bound nat keepalive state collection
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (54 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 55/83] xfrm: fix xfrm_state_construct() auth-trunc leak Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 57/83] net: bridge: mcast: fix use-after-free of a master VLANs multicast context Greg Kroah-Hartman
` (35 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eyal Birger, Vega, Zihan Xi,
Steffen Klassert
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zihan Xi <zihanx@nebusec.ai>
commit 4e9442ce551ebd84b52ad649df721e2dc28af95a upstream.
The v1 nat keepalive fix allocates a GFP_ATOMIC object for every state
while collecting references for phase two. This makes the worker's
temporary memory use depend on the number of states and lets -ENOMEM abort
the scan.
Replace the allocated list with a fixed-size batch. When the batch is full,
return a private walk status so xfrm_state_walk() leaves a cursor; drain
the references after the walk releases xfrm_state_lock and resume from
the cursor. This bounds temporary memory use and avoids the allocation
failure path.
The v1 fix also moved nat_keepalive_send() out of the walk callback. Keep
the phase-two drain BH-disabled, as required by local_lock_nested_bh()
used by the keepalive sockets.
Fixes: 763fe700b7c5 ("xfrm: avoid lock inversion in nat keepalive work")
Cc: stable@vger.kernel.org
Cc: Eyal Birger <eyal.birger@gmail.com>
Reported-by: Vega <vega@nebusec.ai>
Assisted-by: Codex:gpt-5.4
Signed-off-by: Zihan Xi <zihanx@nebusec.ai>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/xfrm/xfrm_nat_keepalive.c | 46 +++++++++++++++++++-----------------------
1 file changed, 21 insertions(+), 25 deletions(-)
--- a/net/xfrm/xfrm_nat_keepalive.c
+++ b/net/xfrm/xfrm_nat_keepalive.c
@@ -155,32 +155,30 @@ static void nat_keepalive_send(struct na
}
}
+enum {
+ NAT_KEEPALIVE_BATCH_SIZE = 16,
+ NAT_KEEPALIVE_BATCH_FULL = 1,
+};
+
struct nat_keepalive_work_ctx {
- struct list_head states;
+ struct xfrm_state *batch[NAT_KEEPALIVE_BATCH_SIZE];
+ unsigned int nr;
time64_t next_run;
time64_t now;
};
-struct nat_keepalive_state {
- struct list_head list;
- struct xfrm_state *x;
-};
-
static int nat_keepalive_work_collect(struct xfrm_state *x, int count, void *ptr)
{
struct nat_keepalive_work_ctx *ctx = ptr;
- struct nat_keepalive_state *state;
if (!READ_ONCE(x->nat_keepalive_interval))
return 0;
- state = kmalloc_obj(*state, GFP_ATOMIC);
- if (!state)
- return -ENOMEM;
+ if (ctx->nr == ARRAY_SIZE(ctx->batch))
+ return NAT_KEEPALIVE_BATCH_FULL;
xfrm_state_hold(x);
- state->x = x;
- list_add_tail(&state->list, &ctx->states);
+ ctx->batch[ctx->nr++] = x;
return 0;
}
@@ -226,29 +224,27 @@ out:
static void nat_keepalive_work(struct work_struct *work)
{
- struct nat_keepalive_state *state, *tmp;
struct nat_keepalive_work_ctx ctx;
struct xfrm_state_walk walk;
struct net *net;
- int err;
+ int err, i;
- INIT_LIST_HEAD(&ctx.states);
ctx.next_run = 0;
ctx.now = ktime_get_real_seconds();
net = container_of(work, struct net, xfrm.nat_keepalive_work.work);
xfrm_state_walk_init(&walk, IPPROTO_ESP, NULL);
- err = xfrm_state_walk(net, &walk, nat_keepalive_work_collect, &ctx);
+ do {
+ ctx.nr = 0;
+ err = xfrm_state_walk(net, &walk, nat_keepalive_work_collect, &ctx);
+ local_bh_disable();
+ for (i = 0; i < ctx.nr; i++) {
+ nat_keepalive_work_single(ctx.batch[i], &ctx);
+ xfrm_state_put(ctx.batch[i]);
+ }
+ local_bh_enable();
+ } while (err == NAT_KEEPALIVE_BATCH_FULL);
xfrm_state_walk_done(&walk, net);
- list_for_each_entry_safe(state, tmp, &ctx.states, list) {
- nat_keepalive_work_single(state->x, &ctx);
- xfrm_state_put(state->x);
- kfree(state);
- }
- if (err == -ENOMEM) {
- schedule_delayed_work(&net->xfrm.nat_keepalive_work, 0);
- return;
- }
if (ctx.next_run)
schedule_delayed_work(&net->xfrm.nat_keepalive_work,
(ctx.next_run - ctx.now) * HZ);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 57/83] net: bridge: mcast: fix use-after-free of a master VLANs multicast context
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (55 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 56/83] xfrm: bound nat keepalive state collection Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 58/83] ipv6: seg6: clear IPv4 control block on IPIP decapsulation Greg Kroah-Hartman
` (34 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Norbert Szetei, Nikolay Aleksandrov,
Jakub Kicinski
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Norbert Szetei <norbert@doyensec.com>
commit 50e5c6605cc9c2dd57bd2d1b3459674d19738983 upstream.
br_multicast_toggle_one_vlan() clears BR_VLFLAG_MCAST_ENABLED under
br->multicast_lock before stopping a VLAN's multicast context. That is
the teardown handshake: lockless readers gate on the flag through
br_multicast_ctx_should_use() -> br_multicast_ctx_vlan_disabled(), so
once it is cleared under the lock no reader can arm the context again.
For a master VLAN the handshake never runs. __vlan_del() clears
BRIDGE_VLAN_INFO_BRENTRY before calling br_vlan_put_master(), so
br_multicast_toggle_one_vlan(masterv, false) returns early on
!br_vlan_is_brentry(vlan): the flag stays set and br->multicast_lock is
never taken. br_vlan_put_master() then drains the context in
br_multicast_ctx_deinit() and frees the VLAN through call_rcu(), while a
reader still inside rcu_read_lock() sees the context as enabled and
re-arms it. The port and port-VLAN branch of the function has no
br_vlan_is_brentry() test and flips the flag under br->multicast_lock,
so it is not affected.
The reader is the bridge transmit path. For a master VLAN
br_multicast_rcv() selects brmctx = &vlan->br_mcast_ctx with
pmctx = NULL, so IGMP sent to the bridge device re-arms the context's
timers after br_multicast_ctx_deinit() has already stopped them.
BUG: KASAN: slab-use-after-free in detach_if_pending+0x412/0x4a0
Write of size 8 at addr ffff88810ac39918 by task brmc/601
__mod_timer+0x51a/0xc50
br_multicast_host_join+0x25b/0x390
__br_multicast_add_group+0x468/0x530
br_ip4_multicast_add_group+0x1a0/0x260
br_multicast_rcv+0x2cda/0x61e0
br_dev_xmit+0x6c4/0x1540
Allocated by task 610:
br_vlan_add+0x111/0xb40
br_vlan_info+0x370/0x3e0
Freed by task 0:
kfree+0x1a7/0x4f0
rcu_core+0x7dc/0x10a0
Only test br_vlan_is_brentry() when enabling, like the
br_multicast_ctx_vlan_global_disabled() test next to it. Disabling then
always clears BR_VLFLAG_MCAST_ENABLED under br->multicast_lock before
br_multicast_ctx_deinit() drains the context.
Fixes: 7b54aaaf53cb ("net: bridge: multicast: add vlan state initialization and control")
Cc: stable@vger.kernel.org
Signed-off-by: Norbert Szetei <norbert@doyensec.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/D400F6C7-543A-4B79-9E5B-D1D8974DE5C9@doyensec.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/bridge/br_multicast.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -4311,8 +4311,8 @@ void br_multicast_toggle_one_vlan(struct
if (br_vlan_is_master(vlan)) {
br = vlan->br;
- if (!br_vlan_is_brentry(vlan) ||
- (on &&
+ if (on &&
+ (!br_vlan_is_brentry(vlan) ||
br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
return;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 58/83] ipv6: seg6: clear IPv4 control block on IPIP decapsulation
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (56 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 57/83] net: bridge: mcast: fix use-after-free of a master VLANs multicast context Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 59/83] batman-adv: reject unrepresentable multicast TVLV offsets Greg Kroah-Hartman
` (33 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Andrea Mayer, Kyle Zeng, David Lee,
Jakub Kicinski
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kyle Zeng <kylebot@openai.com>
commit 44930446dde45a7a90fe1446fa38eb0e2c561646 upstream.
End.DX4 and End.DT4 decapsulate an IPv4 packet through
decap_and_validate() and send it directly to IPv4 routing. The inner
packet therefore bypasses ip_rcv_core(), which normally clears IPCB
before IPv4 interprets skb->cb.
The skb instead retains IP6CB data from the outer packet. IP6CB and
IPCB use the same skb->cb storage, so IP6CB(skb)->lastopt overlaps
IPCB(skb)->opt.optlen and srr, while IP6CB(skb)->nhoff overlaps rr and
ts.
The sender can make the stale optlen byte nonzero with a valid outer
extension-header chain. The reproducers put an eight-byte Destination
Options header immediately after the 40-byte IPv6 header and before the
Segment Routing Header. ipv6_destopt_rcv() records the sender-controlled
Destination Options offset in both lastopt and nhoff, setting them to
40. On the reproduced little-endian x86-64 kernel, IPv4 therefore sees
optlen = 40 and rr = 40.
Both tcp_v4_save_options() and __ip_options_echo() skip option copying
when optlen is zero. Here optlen is 40, so the TCP SYN path allocates
room for 40 bytes of option data and calls __ip_options_echo(). The
stale rr value makes that function read inner packet byte 41 as the
Record Route option length. The reproducers set that sender-controlled
byte to 255, so __ip_options_echo() copies 255 bytes into the 40-byte
option-data area.
Separate End.DX4 and End.DT4 reproducers on the unpatched v7.2-rc5
kernel both produced:
BUG: KASAN: slab-out-of-bounds in __ip_options_echo()
Write of size 255
The relevant End.DX4 call path is:
__ip_options_echo
tcp_v4_route_req
tcp_conn_request
tcp_v4_conn_request
tcp_rcv_state_process
tcp_v4_do_rcv
tcp_v4_rcv
ip_protocol_deliver_rcu
ip_local_deliver_finish
ip_local_deliver
input_action_end_dx4_finish
input_action_end_dx4
The relevant End.DT4 call path is:
__ip_options_echo
tcp_v4_route_req
tcp_conn_request
tcp_v4_conn_request
tcp_rcv_state_process
tcp_v4_do_rcv
tcp_v4_rcv
ip_protocol_deliver_rcu
ip_local_deliver_finish
ip_local_deliver
input_action_end_dt4
tcp_v4_save_options() is inlined into the tcp_v4_route_req() path, so
it does not appear as a separate frame.
When decap_and_validate() handles IPPROTO_IPIP, save the ingress
interface from IP6CB, clear IPCB, and restore the saved value. Doing
this in the common decapsulation path covers End.DX4, End.DT4, and
End.DT46's IPv4 arm.
Use IP6CB(skb)->iif rather than skb->skb_iif. These actions run after
l3mdev processing, which can replace skb_iif with the L3 master;
IP6CB iif still records the receiving interface set at IPv6 ingress.
Fixes: 891ef8dd2a8d ("ipv6: sr: implement additional seg6local actions")
Cc: stable@vger.kernel.org
Suggested-by: Andrea Mayer <andrea.mayer@uniroma2.it>
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: Andrea Mayer <andrea.mayer@uniroma2.it>
Link: https://patch.msgid.link/20260817085839.946321-1-david.lee@trailofbits.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/seg6_local.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/net/ipv6/seg6_local.c
+++ b/net/ipv6/seg6_local.c
@@ -256,6 +256,13 @@ static bool decap_and_validate(struct sk
if (iptunnel_pull_offloads(skb))
return false;
+ if (proto == IPPROTO_IPIP) {
+ int iif = IP6CB(skb)->iif;
+
+ memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+ IPCB(skb)->iif = iif;
+ }
+
return true;
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 59/83] batman-adv: reject unrepresentable multicast TVLV offsets
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (57 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 58/83] ipv6: seg6: clear IPv4 control block on IPIP decapsulation Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 60/83] vxlan: keep the last remote linked during FDB flush Greg Kroah-Hartman
` (32 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kyle Zeng, David Lee, Sven Eckelmann,
Jakub Kicinski
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kyle Zeng <kylebot@openai.com>
commit f12c2de4f542e3220e17e0606f492110064f04cb upstream.
The network and transport header fields in struct sk_buff are 16-bit
offsets from skb->head, and U16_MAX is reserved as the unset transport
header value. batadv_tvlv_call_handler() sets both fields from a received
multicast TVLV without checking whether the TVLV end is representable.
If the end offset exceeds the field's range, skb_set_transport_header()
truncates it so that the transport header precedes the network header.
The negative difference is then returned by skb_network_header_len() as
a large u32. batadv_mcast_forw_packet() consequently accepts an oversized
multicast tracker and accesses memory beyond the skb data.
Add skb_set_transport_header_careful(), an offset-aware counterpart to
skb_reset_transport_header_careful(), which validates the final
head-relative offset before assigning it. Use the new helper in
batadv_tvlv_call_handler() and reject unrepresentable TVLVs before
setting the network header.
Fixes: 07afe1ba288c ("batman-adv: mcast: implement multicast packet reception and forwarding")
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>
Acked-by: Sven Eckelmann <sven@narfation.org>
Link: https://patch.msgid.link/20260817084955.944189-1-david.lee@trailofbits.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/linux/skbuff.h | 24 ++++++++++++++++++++++++
net/batman-adv/tvlv.c | 5 ++++-
2 files changed, 28 insertions(+), 1 deletion(-)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3110,6 +3110,30 @@ static inline void skb_set_transport_hea
skb->transport_header += offset;
}
+/**
+ * skb_set_transport_header_careful - conditionally set transport header
+ * @skb: buffer to alter
+ * @offset: offset to add to skb->data
+ *
+ * Hardened version of skb_set_transport_header().
+ *
+ * Returns: true if the operation was a success.
+ */
+static inline bool __must_check
+skb_set_transport_header_careful(struct sk_buff *skb, const int offset)
+{
+ long thoff = skb->data - skb->head + offset;
+
+ if (unlikely(thoff != (typeof(skb->transport_header))thoff))
+ return false;
+
+ if (unlikely(thoff == (typeof(skb->transport_header))~0U))
+ return false;
+
+ skb->transport_header = thoff;
+ return true;
+}
+
static inline unsigned char *skb_network_header(const struct sk_buff *skb)
{
return skb->head + skb->network_header;
--- a/net/batman-adv/tvlv.c
+++ b/net/batman-adv/tvlv.c
@@ -420,8 +420,11 @@ static int batadv_tvlv_call_handler(stru
return NET_RX_SUCCESS;
tvlv_offset = (unsigned char *)tvlv_value - skb->data;
+ if (!skb_set_transport_header_careful(skb,
+ tvlv_offset + tvlv_value_len))
+ return -EINVAL;
+
skb_set_network_header(skb, tvlv_offset);
- skb_set_transport_header(skb, tvlv_offset + tvlv_value_len);
return tvlv_handler->mcast_handler(bat_priv, skb);
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 60/83] vxlan: keep the last remote linked during FDB flush
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (58 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 59/83] batman-adv: reject unrepresentable multicast TVLV offsets Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 61/83] netfilter: nft_set_pipapo_avx2: add missing vzeroupper Greg Kroah-Hartman
` (31 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Kyle Zeng, David Lee, Ido Schimmel,
Jakub Kicinski
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kyle Zeng <kylebot@openai.com>
commit d5d4a7b538b52db63927773a8905fcd9f78a42e2 upstream.
A non-nexthop FDB entry is expected to have at least one remote while it
remains reachable through the FDB hash table. A filtered bulk flush
violates this invariant when every remote matches: It unlinks the last
remote in vxlan_fdb_dst_destroy() and only afterwards tells vxlan_flush()
to destroy the parent FDB entry.
An RCU reader can find the parent during this interval.
first_remote_rcu() then applies list_entry_rcu() to the empty list head,
producing an invalid remote pointer that the receive learning path can
read from and write to.
When a matching remote is the sole remaining remote, leave it linked and
ask the caller to destroy the entire FDB entry. vxlan_fdb_destroy() keeps
the remote attached while sending the deletion notification and removing
the parent from the lookup structures.
Fixes: c499fccb71cb ("vxlan: vxlan_core: Support FDB flushing by destination VNI")
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/20260810144115.821654-1-david.lee@trailofbits.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/vxlan/vxlan_core.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -3060,18 +3060,19 @@ vxlan_fdb_flush_match_remotes(struct vxl
const struct vxlan_fdb_flush_desc *desc,
bool *p_destroy_fdb)
{
- bool remotes_flushed = false;
struct vxlan_rdst *rd, *tmp;
list_for_each_entry_safe(rd, tmp, &f->remotes, list) {
if (!vxlan_fdb_flush_remote_matches(desc, rd))
continue;
+ if (list_is_singular(&f->remotes)) {
+ *p_destroy_fdb = true;
+ return;
+ }
+
vxlan_fdb_dst_destroy(vxlan, f, rd, true);
- remotes_flushed = true;
}
-
- *p_destroy_fdb = remotes_flushed && list_empty(&f->remotes);
}
/* Purge the forwarding table */
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 61/83] netfilter: nft_set_pipapo_avx2: add missing vzeroupper
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (59 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 60/83] vxlan: keep the last remote linked during FDB flush Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 62/83] netfilter: nf_tables: dont queue packet path object notifications Greg Kroah-Hartman
` (30 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eric Biggers, Stefano Brivio,
Pablo Neira Ayuso
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit 55dd20f0f4b1be5c9c8a0275d8d763c86563eac2 upstream.
Since pipapo_get_avx2() uses YMM registers, execute vzeroupper before
returning from it. This is needed to avoid degrading the performance of
any later SSE code that may happen to be executed.
Fixes: 7400b063969b ("nft_set_pipapo: Introduce AVX2-based lookup implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/nft_set_pipapo_avx2.c | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)
--- a/net/netfilter/nft_set_pipapo_avx2.c
+++ b/net/netfilter/nft_set_pipapo_avx2.c
@@ -1156,6 +1156,7 @@ struct nft_pipapo_elem *pipapo_get_avx2(
struct nft_pipapo_scratch *scratch;
const struct nft_pipapo_field *f;
unsigned long *res, *fill, *map;
+ struct nft_pipapo_elem *e;
bool map_index;
int i;
@@ -1228,14 +1229,11 @@ struct nft_pipapo_elem *pipapo_get_avx2(
next_match:
if (ret < 0) {
scratch->map_index = map_index;
- kernel_fpu_end();
- __local_unlock_nested_bh(&scratch->bh_lock);
- return NULL;
+ e = NULL;
+ goto out;
}
if (last) {
- struct nft_pipapo_elem *e;
-
e = f->mt[ret].e;
if (unlikely(__nft_set_elem_expired(&e->ext, tstamp) ||
!nft_set_elem_active(&e->ext, genmask))) {
@@ -1245,9 +1243,7 @@ next_match:
}
scratch->map_index = map_index;
- kernel_fpu_end();
- __local_unlock_nested_bh(&scratch->bh_lock);
- return e;
+ goto out;
}
map_index = !map_index;
@@ -1255,9 +1251,12 @@ next_match:
data += NFT_PIPAPO_GROUPS_PADDED_SIZE(f);
}
+ e = NULL;
+out:
+ asm volatile("vzeroupper");
kernel_fpu_end();
__local_unlock_nested_bh(&scratch->bh_lock);
- return NULL;
+ return e;
}
/**
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 62/83] netfilter: nf_tables: dont queue packet path object notifications
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (60 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 61/83] netfilter: nft_set_pipapo_avx2: add missing vzeroupper Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 63/83] mm/swap: reject swapon() on filesystem-level encrypted files Greg Kroah-Hartman
` (29 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, stable, TencentOS Corvus AI,
Fourie Zhang, Pablo Neira Ayuso
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Fourie Zhang <littleddfu@gmail.com>
commit 7904b94768e983bcb2be34a8d6d1f3450f5b838b upstream.
All file:line references below are against v7.2-rc4 (ac5b0e5651b1). The
trace was captured on 7.2.0-rc6-kasan72rc6 (075b74841bd0), where the same
lines apply.
nft_obj_notify() is exported and reached from the packet path. Its only
in-tree caller is nft_quota_obj_eval() (net/netfilter/nft_quota.c:68),
which notifies with GFP_ATOMIC while evaluating a rule for a transiting
packet, holding no mutex.
Since commit 67cc570edaa0 ("netfilter: nf_tables: coalesce multiple
notifications into one skbuff") that notification is no longer sent
immediately. __nft_obj_notify() queues it onto nft_net->notify_list via
nft_notify_enqueue() (net/netfilter/nf_tables_api.c:1211), which is a bare
list_add_tail(). notify_list has no lock of its own
(include/net/netfilter/nf_tables.h:1951), it is serialised by commit_mutex:
the six other enqueue sites all run inside a netlink transaction, and the
drain in nft_commit_notify() (net/netfilter/nf_tables_api.c:10746) does
list_del() + kfree_skb() from nf_tables_commit() with commit_mutex held.
Sending packets through a chain that references a depleted quota object
therefore races an unlocked list_add_tail() against list_del() +
kfree_skb() on another CPU. The WRITE_ONCE(prev->next, new) in __list_add()
then stores through an sk_buff that has already been freed:
BUG: KASAN: slab-use-after-free in __nft_obj_notify+0x2c5/0x2d0
Write of size 8 at addr ff110001047183c0 by task poc/76
CPU: 0 UID: 1000 PID: 76 Comm: poc Tainted: G W 7.2.0-rc6-kasan72rc6 #4
Call Trace:
<IRQ>
__nft_obj_notify (include/linux/list.h:164 include/linux/list.h:191
net/netfilter/nf_tables_api.c:1211
net/netfilter/nf_tables_api.c:8743)
nft_quota_obj_eval (net/netfilter/nft_quota.c:68)
nft_do_chain_inet
nf_hook_slow
__ip_local_out
ip_push_pending_frames
udp_send_skb
udp_sendmsg
__x64_sys_sendto
Allocated by task 77:
__alloc_skb (net/core/skbuff.c:704)
__nft_obj_notify (include/net/netlink.h:1055
net/netfilter/nf_tables_api.c:8731)
nft_quota_obj_eval (net/netfilter/nft_quota.c:68)
nft_do_chain
Freed by task 79:
nf_tables_commit (include/linux/skbuff.h:1332
net/netfilter/nf_tables_api.c:10759
net/netfilter/nf_tables_api.c:11185)
nfnetlink_rcv_batch (net/netfilter/nfnetlink.c:574)
netlink_unicast
netlink_sendmsg
The buggy address belongs to the cache skbuff_head_cache of size 232
Queueing from the packet path is wrong even leaving the race aside:
notify_list is only drained by nft_commit_notify() from nf_tables_commit()
(:11185), so a notification enqueued outside a transaction is not sent
until some later netlink batch commits, if one ever does.
The gfp argument that nft_obj_notify() still takes is a leftover of the
pre-67cc570edaa0 behaviour, where this path called nfnetlink_send()
directly. Restore that: split the message construction out into
nft_obj_notify_alloc() and let each caller decide what to do with the skb.
nft_obj_notify(), the exported one reached from the packet path, sends it
straight away; nf_tables_obj_notify(), which runs under commit_mutex, keeps
queueing it, so transaction notifications are still coalesced.
Fixes: 67cc570edaa0 ("netfilter: nf_tables: coalesce multiple notifications into one skbuff")
Cc: stable@kernel.org
Reported-by: TencentOS Corvus AI <corvus@tencent.com>
Assisted-by: tencentos-corvus-ai:kimi-k3
Signed-off-by: Fourie Zhang <fouriezhang@tencent.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/nf_tables_api.c | 36 +++++++++++++++++++++++-------------
1 file changed, 23 insertions(+), 13 deletions(-)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -8585,18 +8585,17 @@ static int nf_tables_delobj(struct sk_bu
return nft_delobj(&ctx, obj);
}
-static void
-__nft_obj_notify(struct net *net, const struct nft_table *table,
- struct nft_object *obj, u32 portid, u32 seq, int event,
- u16 flags, int family, int report, gfp_t gfp)
+static struct sk_buff *
+nft_obj_notify_alloc(struct net *net, const struct nft_table *table,
+ struct nft_object *obj, u32 portid, u32 seq, int event,
+ u16 flags, int family, int report, gfp_t gfp)
{
- struct nftables_pernet *nft_net = nft_pernet(net);
struct sk_buff *skb;
int err;
if (!report &&
!nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
- return;
+ return NULL;
skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (skb == NULL)
@@ -8610,10 +8609,10 @@ __nft_obj_notify(struct net *net, const
goto err;
}
- nft_notify_enqueue(skb, report, &nft_net->notify_list);
- return;
+ return skb;
err:
nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
+ return NULL;
}
void nft_obj_notify(struct net *net, const struct nft_table *table,
@@ -8622,6 +8621,7 @@ void nft_obj_notify(struct net *net, con
{
char *buf = kasprintf(gfp, "%s:%u",
table->name, nft_base_seq(net));
+ struct sk_buff *skb;
audit_log_nfcfg(buf,
family,
@@ -8632,17 +8632,27 @@ void nft_obj_notify(struct net *net, con
gfp);
kfree(buf);
- __nft_obj_notify(net, table, obj, portid, seq, event,
- flags, family, report, gfp);
+ /* Called from the packet path, holding no mutex: notify_list is
+ * serialised by commit_mutex, so send this notification directly.
+ */
+ skb = nft_obj_notify_alloc(net, table, obj, portid, seq, event,
+ flags, family, report, gfp);
+ if (skb)
+ nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report, gfp);
}
EXPORT_SYMBOL_GPL(nft_obj_notify);
static void nf_tables_obj_notify(const struct nft_ctx *ctx,
struct nft_object *obj, int event)
{
- __nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid,
- ctx->seq, event, ctx->flags, ctx->family,
- ctx->report, GFP_KERNEL);
+ struct nftables_pernet *nft_net = nft_pernet(ctx->net);
+ struct sk_buff *skb;
+
+ skb = nft_obj_notify_alloc(ctx->net, ctx->table, obj, ctx->portid,
+ ctx->seq, event, ctx->flags, ctx->family,
+ ctx->report, GFP_KERNEL);
+ if (skb)
+ nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
}
/*
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 63/83] mm/swap: reject swapon() on filesystem-level encrypted files
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (61 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 62/83] netfilter: nf_tables: dont queue packet path object notifications Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 64/83] kunit: irq: Continue increasing hrtimer interval for longer Greg Kroah-Hartman
` (28 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eric Biggers, Baoquan He,
Muhammad Usama Anjum, Darrick J. Wong, Barry Song, Chris Li,
Kairui Song, Kemeng Shi, Nhat Pham, Andrew Morton
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit c310a8932a3107c9bc8f01d473e9d085f8aa9c98 upstream.
ext4 and f2fs don't prevent filesystem-level encrypted files from being
set up directly as swap files. In this case, encryption is bypassed.
No one should be doing this, vs. the methods of encrypted swap that
actually do work (such as swapping to a dm-crypt device, or swapping to a
loopback device on top of a filesystem-level encrypted file).
Nevertheless, to prevent user error, make swapon() explicitly reject this
case. Document this behavior in fscrypt.rst as well.
Link: https://lore.kernel.org/20260803180426.3123-1-ebiggers@kernel.org
Fixes: 9bd8212f981e ("ext4 crypto: add encryption policy and password salt support")
Fixes: f424f664f0e8 ("f2fs crypto: add encryption policy and password salt support")
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Baoquan He <baoquan.he@linux.dev>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
Documentation/filesystems/fscrypt.rst | 4 ++++
mm/swapfile.c | 7 +++++++
2 files changed, 11 insertions(+)
--- a/Documentation/filesystems/fscrypt.rst
+++ b/Documentation/filesystems/fscrypt.rst
@@ -1245,6 +1245,10 @@ astute users may notice some differences
- DAX (Direct Access) is not supported on encrypted files.
+- Encrypted files cannot be used directly as swap files. To swap to
+ an encrypted file, set up a loopback device on top of it.
+ Alternatively, encrypted swap can use a dm-crypt device.
+
- The maximum length of an encrypted symlink is 2 bytes shorter than
the maximum length of an unencrypted symlink. For example, on an
EXT4 filesystem with a 4K block size, unencrypted symlinks can be up
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -3519,6 +3519,13 @@ SYSCALL_DEFINE2(swapon, const char __use
error = -EBUSY;
goto bad_swap_unlock_inode;
}
+ if (IS_ENCRYPTED(inode)) {
+ pr_warn_once(
+ "Filesystem-level encrypted swapfile '%s' is unsupported. Create a loop device over it, or use dm-crypt\n",
+ name->name);
+ error = -EINVAL;
+ goto bad_swap_unlock_inode;
+ }
/*
* The swap subsystem needs a major overhaul to support this.
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 64/83] kunit: irq: Continue increasing hrtimer interval for longer
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (62 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 63/83] mm/swap: reject swapon() on filesystem-level encrypted files Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 65/83] crypto: virtio - bound the akcipher result length Greg Kroah-Hartman
` (27 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, David Gow, Ard Biesheuvel,
Eric Biggers
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit faa6c4c4e4ac69926564688a926105621295d613 upstream.
Currently, kunit_irq_test_timer_func() stops increasing the hrtimer
interval as soon as some forward progress is made in each of softirq and
task context. Update it to use a more aggressive strategy: increase the
interval as long as the hrtimer is running significantly faster than
either context.
This resolves an occasional hang in the CRC and crypto library tests
under qemu-system-s390x. It was exposed by the change in the default
preemption model on s390 from NONE to LAZY. That seems to have exposed
the issue by allowing some forward progress to be made while the actual
system timer tick is still starved, preventing jiffies from increasing
or the task context from making much progress towards max_iterations.
Fixes: 201ceb94aa1d ("kunit: irq: Ensure timer doesn't fire too frequently")
Cc: stable@vger.kernel.org
Reviewed-by: David Gow <david@davidgow.net>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260803181842.44648-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
include/kunit/run-in-irq-context.h | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
--- a/include/kunit/run-in-irq-context.h
+++ b/include/kunit/run-in-irq-context.h
@@ -38,11 +38,13 @@ static enum hrtimer_restart kunit_irq_te
softirq_calls = atomic_read(&state->softirq_func_calls);
/*
- * If the timer is firing too often for the softirq or task to ever have
- * a chance to run, increase the timer interval. This is needed on very
- * slow systems.
+ * If the hrtimer is running much faster than the bh_work or the task,
+ * then it is firing too fast and might be starving those contexts as
+ * well as the actual system timer tick. Increase the interval.
*/
- if (hardirq_calls >= 20 && (softirq_calls == 0 || task_calls == 0))
+ if (hardirq_calls >= 20 &&
+ (hardirq_calls / 2 > softirq_calls ||
+ hardirq_calls / 2 > task_calls))
state->interval = ktime_add_ns(state->interval, 250);
if (!state->func(state->test_specific_state))
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 65/83] crypto: virtio - bound the akcipher result length
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (63 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 64/83] kunit: irq: Continue increasing hrtimer interval for longer Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 66/83] crypto: qcom-rng - Enable clock in hwrng case Greg Kroah-Hartman
` (26 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Bryam Vargas, Michael S. Tsirkin
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bryam Vargas <hexlabsecurity@proton.me>
commit f77a956f6a19f9463ef1527c9d0cda50dded6b92 upstream.
virtio_crypto_dataq_akcipher_callback() sets the result length from the
device-reported response length without bounding it to the destination
buffer, which was allocated for the original request length.
sg_copy_from_buffer() then reads that many bytes from the destination
buffer; a backend reporting a larger length over-reads adjacent kernel
heap into the caller's scatterlist (an out-of-bounds read).
Clamp the reported length to the originally requested destination length.
A conforming device reports no more than that, so valid results are
unaffected.
Fixes: a36bd0ad9fbf ("virtio-crypto: adjust dst_len at ops callback")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Message-ID: <20260622-b4-disp-3a2c09a8-v2-1-d1a809281db4@proton.me>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
@@ -88,7 +88,8 @@ static void virtio_crypto_dataq_akcipher
}
/* actual length may be less than dst buffer */
- akcipher_req->dst_len = len - sizeof(vc_req->status);
+ akcipher_req->dst_len = min_t(unsigned int, len - sizeof(vc_req->status),
+ akcipher_req->dst_len);
sg_copy_from_buffer(akcipher_req->dst, sg_nents(akcipher_req->dst),
vc_akcipher_req->dst_buf, akcipher_req->dst_len);
virtio_crypto_akcipher_finalize_req(vc_akcipher_req, akcipher_req, error);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 66/83] crypto: qcom-rng - Enable clock in hwrng case
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (64 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 65/83] crypto: virtio - bound the akcipher result length Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 67/83] crypto: qcom-rng - Remove crypto_rng interface Greg Kroah-Hartman
` (25 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Dmitry Baryshkov, Konrad Dybcio,
Eric Biggers, Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit 0fd97bbda2842d7dcccee599ac2c0e9554bdddbc upstream.
Fix qcom-rng.c to enable the clock before accessing the hardware.
Fixes: f29cd5bb64c2 ("crypto: qcom-rng - Add hw_random interface support")
Cc: stable@vger.kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/qcom-rng.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
--- a/drivers/crypto/qcom-rng.c
+++ b/drivers/crypto/qcom-rng.c
@@ -113,6 +113,13 @@ static int qcom_rng_seed(struct crypto_r
return 0;
}
+static int qcom_hwrng_init(struct hwrng *hwrng)
+{
+ struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
+
+ return clk_prepare_enable(qrng->clk);
+}
+
static int qcom_hwrng_read(struct hwrng *hwrng, void *data, size_t max, bool wait)
{
struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
@@ -120,6 +127,13 @@ static int qcom_hwrng_read(struct hwrng
return qcom_rng_read(qrng, data, max);
}
+static void qcom_hwrng_cleanup(struct hwrng *hwrng)
+{
+ struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
+
+ clk_disable_unprepare(qrng->clk);
+}
+
static int qcom_rng_enable(struct qcom_rng *rng)
{
u32 val;
@@ -208,7 +222,9 @@ static int qcom_rng_probe(struct platfor
if (rng->match_data->hwrng_support) {
rng->hwrng.name = "qcom_hwrng";
+ rng->hwrng.init = qcom_hwrng_init;
rng->hwrng.read = qcom_hwrng_read;
+ rng->hwrng.cleanup = qcom_hwrng_cleanup;
rng->hwrng.quality = QCOM_TRNG_QUALITY;
ret = devm_hwrng_register(&pdev->dev, &rng->hwrng);
if (ret) {
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 67/83] crypto: qcom-rng - Remove crypto_rng interface
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (65 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 66/83] crypto: qcom-rng - Enable clock in hwrng case Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 68/83] crypto: qcom-rng - Allow zero as a random number Greg Kroah-Hartman
` (24 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eric Biggers, Dmitry Baryshkov,
Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit 2ecdf5c9910e20f73639bc322f0518a3439d17c0 upstream.
qcom-rng.c exposes the same hardware through two completely separate
interfaces, crypto_rng and hwrng. However, the implementation of this
is buggy because it permits generation operations from these interfaces
to run concurrently with each other, accessing the same registers. That
is, qcom_rng_generate() synchronizes with itself but not with
qcom_hwrng_read(). This results in potential repetition of output from
the RNG, output of non-random values, etc.
Fortunately, there's actually no point in hardware RNG drivers
implementing the crypto_rng interface. It's not actually used by
anything besides the "rng" algorithm type of AF_ALG, which in turn is
not actually used in practice. Other crypto_rng hardware drivers are
likewise being phased out, leaving just the hwrng support.
Thus, remove it to simplify the code and avoid conflict (and confusion)
with the hwrng interface which is the one that actually matters.
Fixes: f29cd5bb64c2 ("crypto: qcom-rng - Add hw_random interface support")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/Kconfig | 1
drivers/crypto/qcom-rng.c | 158 +++++-----------------------------------------
2 files changed, 19 insertions(+), 140 deletions(-)
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -659,7 +659,6 @@ config CRYPTO_DEV_QCOM_RNG
tristate "Qualcomm Random Number Generator Driver"
depends on ARCH_QCOM || COMPILE_TEST
depends on HW_RANDOM
- select CRYPTO_RNG
help
This driver provides support for the Random Number
Generator hardware found on Qualcomm SoCs.
--- a/drivers/crypto/qcom-rng.c
+++ b/drivers/crypto/qcom-rng.c
@@ -3,10 +3,8 @@
//
// Based on msm-rng.c and downstream driver
-#include <crypto/internal/rng.h>
#include <linux/acpi.h>
#include <linux/clk.h>
-#include <linux/crypto.h>
#include <linux/hw_random.h>
#include <linux/io.h>
#include <linux/iopoll.h>
@@ -32,24 +30,15 @@
#define QCOM_TRNG_QUALITY 1024
struct qcom_rng {
- struct mutex lock;
void __iomem *base;
struct clk *clk;
struct hwrng hwrng;
- struct qcom_rng_match_data *match_data;
-};
-
-struct qcom_rng_ctx {
- struct qcom_rng *rng;
};
struct qcom_rng_match_data {
- bool skip_init;
bool hwrng_support;
};
-static struct qcom_rng *qcom_rng_dev;
-
static int qcom_rng_read(struct qcom_rng *rng, u8 *data, unsigned int max)
{
unsigned int currsize = 0;
@@ -82,37 +71,6 @@ static int qcom_rng_read(struct qcom_rng
return currsize;
}
-static int qcom_rng_generate(struct crypto_rng *tfm,
- const u8 *src, unsigned int slen,
- u8 *dstn, unsigned int dlen)
-{
- struct qcom_rng_ctx *ctx = crypto_rng_ctx(tfm);
- struct qcom_rng *rng = ctx->rng;
- int ret;
-
- ret = clk_prepare_enable(rng->clk);
- if (ret)
- return ret;
-
- mutex_lock(&rng->lock);
-
- ret = qcom_rng_read(rng, dstn, dlen);
-
- mutex_unlock(&rng->lock);
- clk_disable_unprepare(rng->clk);
-
- if (ret >= 0)
- ret = 0;
-
- return ret;
-}
-
-static int qcom_rng_seed(struct crypto_rng *tfm, const u8 *seed,
- unsigned int slen)
-{
- return 0;
-}
-
static int qcom_hwrng_init(struct hwrng *hwrng)
{
struct qcom_rng *qrng = container_of(hwrng, struct qcom_rng, hwrng);
@@ -134,74 +92,26 @@ static void qcom_hwrng_cleanup(struct hw
clk_disable_unprepare(qrng->clk);
}
-static int qcom_rng_enable(struct qcom_rng *rng)
-{
- u32 val;
- int ret;
-
- ret = clk_prepare_enable(rng->clk);
- if (ret)
- return ret;
-
- /* Enable PRNG only if it is not already enabled */
- val = readl_relaxed(rng->base + PRNG_CONFIG);
- if (val & PRNG_CONFIG_HW_ENABLE)
- goto already_enabled;
-
- val = readl_relaxed(rng->base + PRNG_LFSR_CFG);
- val &= ~PRNG_LFSR_CFG_MASK;
- val |= PRNG_LFSR_CFG_CLOCKS;
- writel(val, rng->base + PRNG_LFSR_CFG);
-
- val = readl_relaxed(rng->base + PRNG_CONFIG);
- val |= PRNG_CONFIG_HW_ENABLE;
- writel(val, rng->base + PRNG_CONFIG);
-
-already_enabled:
- clk_disable_unprepare(rng->clk);
-
- return 0;
-}
-
-static int qcom_rng_init(struct crypto_tfm *tfm)
-{
- struct qcom_rng_ctx *ctx = crypto_tfm_ctx(tfm);
-
- ctx->rng = qcom_rng_dev;
-
- if (!ctx->rng->match_data->skip_init)
- return qcom_rng_enable(ctx->rng);
-
- return 0;
-}
-
-static struct rng_alg qcom_rng_alg = {
- .generate = qcom_rng_generate,
- .seed = qcom_rng_seed,
- .seedsize = 0,
- .base = {
- .cra_name = "stdrng",
- .cra_driver_name = "qcom-rng",
- .cra_flags = CRYPTO_ALG_TYPE_RNG,
- .cra_priority = 300,
- .cra_ctxsize = sizeof(struct qcom_rng_ctx),
- .cra_module = THIS_MODULE,
- .cra_init = qcom_rng_init,
- }
-};
-
static int qcom_rng_probe(struct platform_device *pdev)
{
+ const struct qcom_rng_match_data *match_data;
struct qcom_rng *rng;
int ret;
+ match_data = device_get_match_data(&pdev->dev);
+ if (match_data == NULL || !match_data->hwrng_support) {
+ dev_info(&pdev->dev, "TRNG support not detected\n");
+ /*
+ * In this case the driver does nothing except the dev_info(),
+ * but bind the device anyway to avoid effects on GCC state.
+ */
+ return 0;
+ }
+
rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);
if (!rng)
return -ENOMEM;
- platform_set_drvdata(pdev, rng);
- mutex_init(&rng->lock);
-
rng->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(rng->base))
return PTR_ERR(rng->base);
@@ -210,55 +120,26 @@ static int qcom_rng_probe(struct platfor
if (IS_ERR(rng->clk))
return PTR_ERR(rng->clk);
- rng->match_data = (struct qcom_rng_match_data *)device_get_match_data(&pdev->dev);
-
- qcom_rng_dev = rng;
- ret = crypto_register_rng(&qcom_rng_alg);
- if (ret) {
- dev_err(&pdev->dev, "Register crypto rng failed: %d\n", ret);
- qcom_rng_dev = NULL;
- return ret;
- }
-
- if (rng->match_data->hwrng_support) {
- rng->hwrng.name = "qcom_hwrng";
- rng->hwrng.init = qcom_hwrng_init;
- rng->hwrng.read = qcom_hwrng_read;
- rng->hwrng.cleanup = qcom_hwrng_cleanup;
- rng->hwrng.quality = QCOM_TRNG_QUALITY;
- ret = devm_hwrng_register(&pdev->dev, &rng->hwrng);
- if (ret) {
- dev_err(&pdev->dev, "Register hwrng failed: %d\n", ret);
- qcom_rng_dev = NULL;
- goto fail;
- }
- }
-
- return ret;
-fail:
- crypto_unregister_rng(&qcom_rng_alg);
+ rng->hwrng.name = "qcom_hwrng";
+ rng->hwrng.init = qcom_hwrng_init;
+ rng->hwrng.read = qcom_hwrng_read;
+ rng->hwrng.cleanup = qcom_hwrng_cleanup;
+ rng->hwrng.quality = QCOM_TRNG_QUALITY;
+ ret = devm_hwrng_register(&pdev->dev, &rng->hwrng);
+ if (ret)
+ dev_err(&pdev->dev, "Register hwrng failed: %d\n", ret);
return ret;
}
-static void qcom_rng_remove(struct platform_device *pdev)
-{
- crypto_unregister_rng(&qcom_rng_alg);
-
- qcom_rng_dev = NULL;
-}
-
static struct qcom_rng_match_data qcom_prng_match_data = {
- .skip_init = false,
.hwrng_support = false,
};
static struct qcom_rng_match_data qcom_prng_ee_match_data = {
- .skip_init = true,
.hwrng_support = false,
};
static struct qcom_rng_match_data qcom_trng_match_data = {
- .skip_init = true,
.hwrng_support = true,
};
@@ -278,7 +159,6 @@ MODULE_DEVICE_TABLE(of, qcom_rng_of_matc
static struct platform_driver qcom_rng_driver = {
.probe = qcom_rng_probe,
- .remove = qcom_rng_remove,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = of_match_ptr(qcom_rng_of_match),
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 68/83] crypto: qcom-rng - Allow zero as a random number
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (66 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 67/83] crypto: qcom-rng - Remove crypto_rng interface Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 69/83] crypto: atmel-tdes - use scatterlist length before DMA mapping Greg Kroah-Hartman
` (23 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Dmitry Baryshkov, Konrad Dybcio,
Eric Biggers, Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Biggers <ebiggers@kernel.org>
commit 4ef04bdc0c9f98836d1638be516f6bf1bad55f69 upstream.
Zero is a valid random number and needs to be allowed. Otherwise the
output is distinguishable from random.
Fixes: f29cd5bb64c2 ("crypto: qcom-rng - Add hw_random interface support")
Cc: stable@vger.kernel.org
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/qcom-rng.c | 2 --
1 file changed, 2 deletions(-)
--- a/drivers/crypto/qcom-rng.c
+++ b/drivers/crypto/qcom-rng.c
@@ -54,8 +54,6 @@ static int qcom_rng_read(struct qcom_rng
return ret;
val = readl_relaxed(rng->base + PRNG_DATA_OUT);
- if (!val)
- return -EINVAL;
if ((max - currsize) >= WORD_SZ) {
memcpy(data, &val, WORD_SZ);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 69/83] crypto: atmel-tdes - use scatterlist length before DMA mapping
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (67 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 68/83] crypto: qcom-rng - Allow zero as a random number Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 70/83] crypto: krb5 - use kfree_sensitive() for derived key buffers Greg Kroah-Hartman
` (22 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Thorsten Blum, Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thorsten Blum <thorsten.blum@linux.dev>
commit ba199bdaa80b09a7dd92f28751de7f3dbb06c510 upstream.
Using sg_dma_len() is only valid after mapping the scatterlist with
dma_map_sg(). However, atmel_tdes_crypt_start() uses it before mapping
to compare input/output lengths and to compute the transfer count.
Use the original scatterlist lengths before DMA mapping to avoid reading
stale or uninitialized DMA lengths when CONFIG_NEED_SG_DMA_LENGTH=y.
Drop the output scatterlist length in the fast path since it is equal to
->in_sg->length and does not change the transfer count.
Fixes: 13802005d8f2 ("crypto: atmel - add Atmel DES/TDES driver")
Fixes: 1f858040c2f7 ("crypto: atmel-tdes - add support for latest release of the IP (0x700)")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/atmel-tdes.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/crypto/atmel-tdes.c
+++ b/drivers/crypto/atmel-tdes.c
@@ -463,14 +463,13 @@ static int atmel_tdes_crypt_start(struct
IS_ALIGNED(dd->out_sg->length, dd->ctx->block_size);
fast = in && out;
- if (sg_dma_len(dd->in_sg) != sg_dma_len(dd->out_sg))
+ if (dd->in_sg->length != dd->out_sg->length)
fast = 0;
}
if (fast) {
- count = min_t(size_t, dd->total, sg_dma_len(dd->in_sg));
- count = min_t(size_t, count, sg_dma_len(dd->out_sg));
+ count = min_t(size_t, dd->total, dd->in_sg->length);
err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
if (!err) {
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 70/83] crypto: krb5 - use kfree_sensitive() for derived key buffers
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (68 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 69/83] crypto: atmel-tdes - use scatterlist length before DMA mapping Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 71/83] crypto: qce - fix CCM AAD buffer underallocation Greg Kroah-Hartman
` (21 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jan Sebastian Götte, Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jan Sebastian Götte <linux@jaseg.de>
commit f7d53dd3f267e46a784f219a75072f2f400d42b9 upstream.
crypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum()
free the buffer holding the freshly derived keys with plain kfree(),
leaving the key material behind in the freed slab object.
Fixes: 3936f02bf2d3 ("crypto/krb5: Implement Kerberos crypto core")
Cc: stable@vger.kernel.org
Signed-off-by: Jan Sebastian Götte <linux@jaseg.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
crypto/krb5/krb5_api.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/crypto/krb5/krb5_api.c
+++ b/crypto/krb5/krb5_api.c
@@ -263,10 +263,10 @@ struct crypto_aead *crypto_krb5_prepare_
goto err;
}
- kfree(keys.data);
+ kfree_sensitive(keys.data);
return ci;
err:
- kfree(keys.data);
+ kfree_sensitive(keys.data);
return ERR_PTR(ret);
}
EXPORT_SYMBOL(crypto_krb5_prepare_encryption);
@@ -333,10 +333,10 @@ struct crypto_shash *crypto_krb5_prepare
goto err;
}
- kfree(keys.data);
+ kfree_sensitive(keys.data);
return ci;
err:
- kfree(keys.data);
+ kfree_sensitive(keys.data);
return ERR_PTR(ret);
}
EXPORT_SYMBOL(crypto_krb5_prepare_checksum);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 71/83] crypto: qce - fix CCM AAD buffer underallocation
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (69 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 70/83] crypto: krb5 - use kfree_sensitive() for derived key buffers Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 72/83] crypto: mxs-dcp - fix source scatterlist length access Greg Kroah-Hartman
` (20 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Md Sadre Alam, Bartosz Golaszewski,
Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Md Sadre Alam <md.alam@oss.qualcomm.com>
commit 7f2345f47dd189625f657cd72437179ab4170ee1 upstream.
The AAD buffer allocated in qce_aead_ccm_prepare_buf_assoclen()
can be smaller than the length later programmed into the DMA
scatterlist.
The allocation size is currently calculated as:
ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN
while the DMA length is set to:
ALIGN(assoclen + adata_header_len, 16)
Since ALIGN() does not distribute over addition, the allocation
can be smaller than the DMA length. For example, when
assoclen = 32 and adata_header_len = 2:
allocation = ALIGN(32, 16) + 6 = 38
DMA length = ALIGN(32 + 2, 16) = 48
As a result, the QCE hardware can read beyond the allocated
buffer while computing the CBC-MAC over the associated data.
The extra bytes are folded into the authentication tag,
resulting in an incorrect tag and causing CCM self-test
failures such as:
alg: aead: ccm-aes-qce encryption test failed (wrong result)
on test vector 8
Fix the allocation by adding the maximum possible AAD header
length before alignment:
ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16)
This guarantees that the allocated buffer is large enough
for the fully padded AAD data for all supported header sizes.
Cc: stable@vger.kernel.org
Fixes: 9363efb4181c ("crypto: qce - Add support for AEAD algorithms")
Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/qce/aead.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/crypto/qce/aead.c
+++ b/drivers/crypto/qce/aead.c
@@ -203,7 +203,7 @@ qce_aead_ccm_prepare_buf_assoclen(struct
/* Get the msg */
msg_sg = scatterwalk_ffwd(__sg, req->src, req->assoclen);
- rctx->adata = kzalloc((ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN) *
+ rctx->adata = kzalloc(ALIGN(assoclen + MAX_CCM_ADATA_HEADER_LEN, 16) *
sizeof(unsigned char), GFP_ATOMIC);
if (!rctx->adata)
return -ENOMEM;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 72/83] crypto: mxs-dcp - fix source scatterlist length access
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (70 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 71/83] crypto: qce - fix CCM AAD buffer underallocation Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 73/83] crypto: qce - Remove unsafe/deprecated algorithms Greg Kroah-Hartman
` (19 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Thorsten Blum, Frank Li, Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thorsten Blum <thorsten.blum@linux.dev>
commit c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8 upstream.
mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source
scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid
and could return zero or a stale DMA length, causing encryption and
decryption to process the wrong number of bytes when
CONFIG_NEED_SG_DMA_LENGTH=y.
Use the original scatterlist length instead.
Fixes: 15b59e7c3733 ("crypto: mxs - Add Freescale MXS DCP driver")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/mxs-dcp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/crypto/mxs-dcp.c
+++ b/drivers/crypto/mxs-dcp.c
@@ -353,7 +353,7 @@ static int mxs_dcp_aes_block_crypt(struc
for_each_sg(req->src, src, sg_nents(req->src), i) {
src_buf = sg_virt(src);
- len = sg_dma_len(src);
+ len = src->length;
tlen += len;
limit_hit = tlen > req->cryptlen;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 73/83] crypto: qce - Remove unsafe/deprecated algorithms
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (71 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 72/83] crypto: mxs-dcp - fix source scatterlist length access Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 74/83] KVM: s390: vsie: zero stale crypto bits Greg Kroah-Hartman
` (18 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, Eric Biggers, Kuldeep Singh,
Bartosz Golaszewski, Herbert Xu
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
commit 7e28b0a5c4b7d075b98ce6d8f5290a9d3deb5b92 upstream.
Remove algorithms that are either unsafe or deprecated and have no
in-kernel users that cannot be served by the ARM CE implementations.
AES-ECB reveals plaintext patterns (identical plaintext blocks produce
identical ciphertext blocks) and should not be exposed as a hardware-
accelerated primitive. DES, Triple DES and HMAC-SHA1 have been
deprecated for years.
Remove sha1, ecb(aes), ecb(des), cbc(des), ecb(des3_ede), cbc(des3_ede),
hmac(sha1) and all AEAD variants built on these primitives as well as
authenc(hmac(sha256),cbc(des)). Also clean up the - now dead - code,
flags and constants.
Cc: stable@vger.kernel.org
Acked-by: Eric Biggers <ebiggers@kernel.org>
Tested-by: Kuldeep Singh <kuldeep.singh@oss.qualcomm.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/qce/aead.c | 56 ------------------------
drivers/crypto/qce/common.c | 55 +++++------------------
drivers/crypto/qce/common.h | 16 +-----
drivers/crypto/qce/regs-v5.h | 4 -
drivers/crypto/qce/sha.c | 30 ------------
drivers/crypto/qce/sha.h | 1
drivers/crypto/qce/skcipher.c | 97 ------------------------------------------
7 files changed, 20 insertions(+), 239 deletions(-)
--- a/drivers/crypto/qce/aead.c
+++ b/drivers/crypto/qce/aead.c
@@ -8,8 +8,6 @@
#include <crypto/gcm.h>
#include <crypto/authenc.h>
#include <crypto/internal/aead.h>
-#include <crypto/internal/des.h>
-#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/scatterwalk.h>
#include "aead.h"
@@ -597,7 +595,6 @@ static int qce_aead_setkey(struct crypto
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
struct crypto_authenc_keys authenc_keys;
unsigned long flags = to_aead_tmpl(tfm)->alg_flags;
- u32 _key[6];
int err;
err = crypto_authenc_extractkeys(&authenc_keys, key, keylen);
@@ -608,26 +605,7 @@ static int qce_aead_setkey(struct crypto
authenc_keys.authkeylen > QCE_MAX_KEY_SIZE)
return -EINVAL;
- if (IS_DES(flags)) {
- err = verify_aead_des_key(tfm, authenc_keys.enckey, authenc_keys.enckeylen);
- if (err)
- return err;
- } else if (IS_3DES(flags)) {
- err = verify_aead_des3_key(tfm, authenc_keys.enckey, authenc_keys.enckeylen);
- if (err)
- return err;
- /*
- * The crypto engine does not support any two keys
- * being the same for triple des algorithms. The
- * verify_skcipher_des3_key does not check for all the
- * below conditions. Schedule fallback in this case.
- */
- memcpy(_key, authenc_keys.enckey, DES3_EDE_KEY_SIZE);
- if (!((_key[0] ^ _key[2]) | (_key[1] ^ _key[3])) ||
- !((_key[2] ^ _key[4]) | (_key[3] ^ _key[5])) ||
- !((_key[0] ^ _key[4]) | (_key[1] ^ _key[5])))
- ctx->need_fallback = true;
- } else if (IS_AES(flags)) {
+ if (IS_AES(flags)) {
/* No random key sizes */
if (authenc_keys.enckeylen != AES_KEYSIZE_128 &&
authenc_keys.enckeylen != AES_KEYSIZE_192 &&
@@ -699,38 +677,6 @@ struct qce_aead_def {
static const struct qce_aead_def aead_def[] = {
{
- .flags = QCE_ALG_DES | QCE_MODE_CBC | QCE_HASH_SHA1_HMAC,
- .name = "authenc(hmac(sha1),cbc(des))",
- .drv_name = "authenc-hmac-sha1-cbc-des-qce",
- .blocksize = DES_BLOCK_SIZE,
- .ivsize = DES_BLOCK_SIZE,
- .maxauthsize = SHA1_DIGEST_SIZE,
- },
- {
- .flags = QCE_ALG_3DES | QCE_MODE_CBC | QCE_HASH_SHA1_HMAC,
- .name = "authenc(hmac(sha1),cbc(des3_ede))",
- .drv_name = "authenc-hmac-sha1-cbc-3des-qce",
- .blocksize = DES3_EDE_BLOCK_SIZE,
- .ivsize = DES3_EDE_BLOCK_SIZE,
- .maxauthsize = SHA1_DIGEST_SIZE,
- },
- {
- .flags = QCE_ALG_DES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC,
- .name = "authenc(hmac(sha256),cbc(des))",
- .drv_name = "authenc-hmac-sha256-cbc-des-qce",
- .blocksize = DES_BLOCK_SIZE,
- .ivsize = DES_BLOCK_SIZE,
- .maxauthsize = SHA256_DIGEST_SIZE,
- },
- {
- .flags = QCE_ALG_3DES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC,
- .name = "authenc(hmac(sha256),cbc(des3_ede))",
- .drv_name = "authenc-hmac-sha256-cbc-3des-qce",
- .blocksize = DES3_EDE_BLOCK_SIZE,
- .ivsize = DES3_EDE_BLOCK_SIZE,
- .maxauthsize = SHA256_DIGEST_SIZE,
- },
- {
.flags = QCE_ALG_AES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC,
.name = "authenc(hmac(sha256),cbc(aes))",
.drv_name = "authenc-hmac-sha256-cbc-aes-qce",
--- a/drivers/crypto/qce/common.c
+++ b/drivers/crypto/qce/common.c
@@ -8,7 +8,6 @@
#include <linux/interrupt.h>
#include <linux/types.h>
#include <crypto/scatterwalk.h>
-#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include "cipher.h"
@@ -115,18 +114,16 @@ static u32 qce_auth_cfg(unsigned long fl
cfg |= AUTH_KEY_SZ_AES256 << AUTH_KEY_SIZE_SHIFT;
}
- if (IS_SHA1(flags) || IS_SHA1_HMAC(flags))
- cfg |= AUTH_SIZE_SHA1 << AUTH_SIZE_SHIFT;
- else if (IS_SHA256(flags) || IS_SHA256_HMAC(flags))
+ if (IS_SHA256(flags) || IS_SHA256_HMAC(flags))
cfg |= AUTH_SIZE_SHA256 << AUTH_SIZE_SHIFT;
else if (IS_CMAC(flags))
cfg |= AUTH_SIZE_ENUM_16_BYTES << AUTH_SIZE_SHIFT;
else if (IS_CCM(flags))
cfg |= (auth_size - 1) << AUTH_SIZE_SHIFT;
- if (IS_SHA1(flags) || IS_SHA256(flags))
+ if (IS_SHA256(flags))
cfg |= AUTH_MODE_HASH << AUTH_MODE_SHIFT;
- else if (IS_SHA1_HMAC(flags) || IS_SHA256_HMAC(flags))
+ else if (IS_SHA256_HMAC(flags))
cfg |= AUTH_MODE_HMAC << AUTH_MODE_SHIFT;
else if (IS_CCM(flags))
cfg |= AUTH_MODE_CCM << AUTH_MODE_SHIFT;
@@ -191,7 +188,7 @@ static int qce_setup_regs_ahash(struct c
else
qce_cpu_to_be32p_array(auth, rctx->digest, digestsize);
- iv_words = (IS_SHA1(rctx->flags) || IS_SHA1_HMAC(rctx->flags)) ? 5 : 8;
+ iv_words = 8;
qce_write_array(qce, REG_AUTH_IV0, (u32 *)auth, iv_words);
if (rctx->first_blk)
@@ -243,19 +240,8 @@ static u32 qce_encr_cfg(unsigned long fl
if (IS_AES(flags))
cfg |= ENCR_ALG_AES << ENCR_ALG_SHIFT;
- else if (IS_DES(flags) || IS_3DES(flags))
- cfg |= ENCR_ALG_DES << ENCR_ALG_SHIFT;
-
- if (IS_DES(flags))
- cfg |= ENCR_KEY_SZ_DES << ENCR_KEY_SZ_SHIFT;
-
- if (IS_3DES(flags))
- cfg |= ENCR_KEY_SZ_3DES << ENCR_KEY_SZ_SHIFT;
switch (flags & QCE_MODE_MASK) {
- case QCE_MODE_ECB:
- cfg |= ENCR_MODE_ECB << ENCR_MODE_SHIFT;
- break;
case QCE_MODE_CBC:
cfg |= ENCR_MODE_CBC << ENCR_MODE_SHIFT;
break;
@@ -340,13 +326,7 @@ static int qce_setup_regs_skcipher(struc
encr_cfg = qce_encr_cfg(flags, keylen);
- if (IS_DES(flags)) {
- enciv_words = 2;
- enckey_words = 2;
- } else if (IS_3DES(flags)) {
- enciv_words = 2;
- enckey_words = 6;
- } else if (IS_AES(flags)) {
+ if (IS_AES(flags)) {
if (IS_XTS(flags))
qce_xtskey(qce, ctx->enc_key, ctx->enc_keylen,
rctx->cryptlen);
@@ -357,14 +337,12 @@ static int qce_setup_regs_skcipher(struc
qce_write_array(qce, REG_ENCR_KEY0, (u32 *)enckey, enckey_words);
- if (!IS_ECB(flags)) {
- if (IS_XTS(flags))
- qce_xts_swapiv(enciv, rctx->iv, ivsize);
- else
- qce_cpu_to_be32p_array(enciv, rctx->iv, ivsize);
+ if (IS_XTS(flags))
+ qce_xts_swapiv(enciv, rctx->iv, ivsize);
+ else
+ qce_cpu_to_be32p_array(enciv, rctx->iv, ivsize);
- qce_write_array(qce, REG_CNTR0_IV0, (u32 *)enciv, enciv_words);
- }
+ qce_write_array(qce, REG_CNTR0_IV0, (u32 *)enciv, enciv_words);
if (IS_ENCRYPT(flags))
encr_cfg |= BIT(ENCODE_SHIFT);
@@ -393,10 +371,6 @@ static int qce_setup_regs_skcipher(struc
#endif
#ifdef CONFIG_CRYPTO_DEV_QCE_AEAD
-static const u32 std_iv_sha1[SHA256_DIGEST_SIZE / sizeof(u32)] = {
- SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4, 0, 0, 0
-};
-
static const u32 std_iv_sha256[SHA256_DIGEST_SIZE / sizeof(u32)] = {
SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7
@@ -473,13 +447,8 @@ static int qce_setup_regs_aead(struct cr
/* Write initial authentication IV only for HMAC algorithms */
if (IS_SHA_HMAC(rctx->flags)) {
/* Write default authentication iv */
- if (IS_SHA1_HMAC(rctx->flags)) {
- auth_ivsize = SHA1_DIGEST_SIZE;
- memcpy(authiv, std_iv_sha1, auth_ivsize);
- } else if (IS_SHA256_HMAC(rctx->flags)) {
- auth_ivsize = SHA256_DIGEST_SIZE;
- memcpy(authiv, std_iv_sha256, auth_ivsize);
- }
+ auth_ivsize = SHA256_DIGEST_SIZE;
+ memcpy(authiv, std_iv_sha256, auth_ivsize);
authiv_words = auth_ivsize / sizeof(u32);
qce_write_array(qce, REG_AUTH_IV0, (u32 *)authiv, authiv_words);
} else if (IS_CCM(rctx->flags)) {
--- a/drivers/crypto/qce/common.h
+++ b/drivers/crypto/qce/common.h
@@ -22,7 +22,7 @@
/* IV length in bytes */
#define QCE_AES_IV_LENGTH AES_BLOCK_SIZE
-/* max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
+/* max of AES_BLOCK_SIZE */
#define QCE_MAX_IV_SIZE AES_BLOCK_SIZE
/* maximum nonce bytes */
@@ -33,14 +33,10 @@
#define QCE_MAX_ALIGN_SIZE 64
/* cipher algorithms */
-#define QCE_ALG_DES BIT(0)
-#define QCE_ALG_3DES BIT(1)
#define QCE_ALG_AES BIT(2)
/* hash and hmac algorithms */
-#define QCE_HASH_SHA1 BIT(3)
#define QCE_HASH_SHA256 BIT(4)
-#define QCE_HASH_SHA1_HMAC BIT(5)
#define QCE_HASH_SHA256_HMAC BIT(6)
#define QCE_HASH_AES_CMAC BIT(7)
@@ -58,21 +54,15 @@
#define QCE_ENCRYPT BIT(30)
#define QCE_DECRYPT BIT(31)
-#define IS_DES(flags) (flags & QCE_ALG_DES)
-#define IS_3DES(flags) (flags & QCE_ALG_3DES)
#define IS_AES(flags) (flags & QCE_ALG_AES)
-#define IS_SHA1(flags) (flags & QCE_HASH_SHA1)
#define IS_SHA256(flags) (flags & QCE_HASH_SHA256)
-#define IS_SHA1_HMAC(flags) (flags & QCE_HASH_SHA1_HMAC)
#define IS_SHA256_HMAC(flags) (flags & QCE_HASH_SHA256_HMAC)
#define IS_CMAC(flags) (flags & QCE_HASH_AES_CMAC)
-#define IS_SHA(flags) (IS_SHA1(flags) || IS_SHA256(flags))
-#define IS_SHA_HMAC(flags) \
- (IS_SHA1_HMAC(flags) || IS_SHA256_HMAC(flags))
+#define IS_SHA(flags) IS_SHA256(flags)
+#define IS_SHA_HMAC(flags) IS_SHA256_HMAC(flags)
#define IS_CBC(mode) (mode & QCE_MODE_CBC)
-#define IS_ECB(mode) (mode & QCE_MODE_ECB)
#define IS_CTR(mode) (mode & QCE_MODE_CTR)
#define IS_XTS(mode) (mode & QCE_MODE_XTS)
#define IS_CCM(mode) (mode & QCE_MODE_CCM)
--- a/drivers/crypto/qce/regs-v5.h
+++ b/drivers/crypto/qce/regs-v5.h
@@ -203,7 +203,6 @@
#define AUTH_SIZE_SHIFT 9
#define AUTH_SIZE_MASK GENMASK(13, 9)
-#define AUTH_SIZE_SHA1 0
#define AUTH_SIZE_SHA256 1
#define AUTH_SIZE_ENUM_1_BYTES 0
#define AUTH_SIZE_ENUM_2_BYTES 1
@@ -284,15 +283,12 @@
#define ENCR_KEY_SZ_SHIFT 3
#define ENCR_KEY_SZ_MASK GENMASK(5, 3)
-#define ENCR_KEY_SZ_DES 0
-#define ENCR_KEY_SZ_3DES 1
#define ENCR_KEY_SZ_AES128 0
#define ENCR_KEY_SZ_AES256 2
#define ENCR_ALG_SHIFT 0
#define ENCR_ALG_MASK GENMASK(2, 0)
#define ENCR_ALG_NONE 0
-#define ENCR_ALG_DES 1
#define ENCR_ALG_AES 2
#define ENCR_ALG_KASUMI 4
#define ENCR_ALG_SNOW_3G 5
--- a/drivers/crypto/qce/sha.c
+++ b/drivers/crypto/qce/sha.c
@@ -24,10 +24,6 @@ struct qce_sha_saved_state {
static LIST_HEAD(ahash_algs);
-static const u32 std_iv_sha1[SHA256_DIGEST_SIZE / sizeof(u32)] = {
- SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4, 0, 0, 0
-};
-
static const u32 std_iv_sha256[SHA256_DIGEST_SIZE / sizeof(u32)] = {
SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7
@@ -348,9 +344,7 @@ static int qce_ahash_hmac_setkey(struct
return 0;
}
- if (digestsize == SHA1_DIGEST_SIZE)
- alg_name = "sha1-qce";
- else if (digestsize == SHA256_DIGEST_SIZE)
+ if (digestsize == SHA256_DIGEST_SIZE)
alg_name = "sha256-qce";
else
return -EINVAL;
@@ -412,15 +406,6 @@ struct qce_ahash_def {
static const struct qce_ahash_def ahash_def[] = {
{
- .flags = QCE_HASH_SHA1,
- .name = "sha1",
- .drv_name = "sha1-qce",
- .digestsize = SHA1_DIGEST_SIZE,
- .blocksize = SHA1_BLOCK_SIZE,
- .statesize = sizeof(struct qce_sha_saved_state),
- .std_iv = std_iv_sha1,
- },
- {
.flags = QCE_HASH_SHA256,
.name = "sha256",
.drv_name = "sha256-qce",
@@ -430,15 +415,6 @@ static const struct qce_ahash_def ahash_
.std_iv = std_iv_sha256,
},
{
- .flags = QCE_HASH_SHA1_HMAC,
- .name = "hmac(sha1)",
- .drv_name = "hmac-sha1-qce",
- .digestsize = SHA1_DIGEST_SIZE,
- .blocksize = SHA1_BLOCK_SIZE,
- .statesize = sizeof(struct qce_sha_saved_state),
- .std_iv = std_iv_sha1,
- },
- {
.flags = QCE_HASH_SHA256_HMAC,
.name = "hmac(sha256)",
.drv_name = "hmac-sha256-qce",
@@ -475,9 +451,7 @@ static int qce_ahash_register_one(const
alg->halg.digestsize = def->digestsize;
alg->halg.statesize = def->statesize;
- if (IS_SHA1(def->flags))
- tmpl->hash_zero = sha1_zero_message_hash;
- else if (IS_SHA256(def->flags))
+ if (IS_SHA256(def->flags))
tmpl->hash_zero = sha256_zero_message_hash;
base = &alg->halg.base;
--- a/drivers/crypto/qce/sha.h
+++ b/drivers/crypto/qce/sha.h
@@ -7,7 +7,6 @@
#define _SHA_H_
#include <crypto/scatterwalk.h>
-#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include "common.h"
--- a/drivers/crypto/qce/skcipher.c
+++ b/drivers/crypto/qce/skcipher.c
@@ -10,7 +10,6 @@
#include <linux/types.h>
#include <linux/errno.h>
#include <crypto/aes.h>
-#include <crypto/internal/des.h>
#include <crypto/internal/skcipher.h>
#include "cipher.h"
@@ -208,51 +207,6 @@ static int qce_skcipher_setkey(struct cr
return ret;
}
-static int qce_des_setkey(struct crypto_skcipher *ablk, const u8 *key,
- unsigned int keylen)
-{
- struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(ablk);
- int err;
-
- err = verify_skcipher_des_key(ablk, key);
- if (err)
- return err;
-
- ctx->enc_keylen = keylen;
- memcpy(ctx->enc_key, key, keylen);
- return 0;
-}
-
-static int qce_des3_setkey(struct crypto_skcipher *ablk, const u8 *key,
- unsigned int keylen)
-{
- struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(ablk);
- u32 _key[6];
- int err;
-
- err = verify_skcipher_des3_key(ablk, key);
- if (err)
- return err;
-
- /*
- * The crypto engine does not support any two keys
- * being the same for triple des algorithms. The
- * verify_skcipher_des3_key does not check for all the
- * below conditions. Return -ENOKEY in case any two keys
- * are the same. Revisit to see if a fallback cipher
- * is needed to handle this condition.
- */
- memcpy(_key, key, DES3_EDE_KEY_SIZE);
- if (!((_key[0] ^ _key[2]) | (_key[1] ^ _key[3])) ||
- !((_key[2] ^ _key[4]) | (_key[3] ^ _key[5])) ||
- !((_key[0] ^ _key[4]) | (_key[1] ^ _key[5])))
- return -ENOKEY;
-
- ctx->enc_keylen = keylen;
- memcpy(ctx->enc_key, key, keylen);
- return 0;
-}
-
static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
@@ -275,7 +229,7 @@ static int qce_skcipher_crypt(struct skc
* ECB and CBC algorithms require message lengths to be
* multiples of block size.
*/
- if (IS_ECB(rctx->flags) || IS_CBC(rctx->flags))
+ if (IS_CBC(rctx->flags))
if (!IS_ALIGNED(req->cryptlen, blocksize))
return -EINVAL;
@@ -359,15 +313,6 @@ struct qce_skcipher_def {
static const struct qce_skcipher_def skcipher_def[] = {
{
- .flags = QCE_ALG_AES | QCE_MODE_ECB,
- .name = "ecb(aes)",
- .drv_name = "ecb-aes-qce",
- .blocksize = AES_BLOCK_SIZE,
- .ivsize = 0,
- .min_keysize = AES_MIN_KEY_SIZE,
- .max_keysize = AES_MAX_KEY_SIZE,
- },
- {
.flags = QCE_ALG_AES | QCE_MODE_CBC,
.name = "cbc(aes)",
.drv_name = "cbc-aes-qce",
@@ -395,42 +340,6 @@ static const struct qce_skcipher_def skc
.min_keysize = AES_MIN_KEY_SIZE * 2,
.max_keysize = AES_MAX_KEY_SIZE * 2,
},
- {
- .flags = QCE_ALG_DES | QCE_MODE_ECB,
- .name = "ecb(des)",
- .drv_name = "ecb-des-qce",
- .blocksize = DES_BLOCK_SIZE,
- .ivsize = 0,
- .min_keysize = DES_KEY_SIZE,
- .max_keysize = DES_KEY_SIZE,
- },
- {
- .flags = QCE_ALG_DES | QCE_MODE_CBC,
- .name = "cbc(des)",
- .drv_name = "cbc-des-qce",
- .blocksize = DES_BLOCK_SIZE,
- .ivsize = DES_BLOCK_SIZE,
- .min_keysize = DES_KEY_SIZE,
- .max_keysize = DES_KEY_SIZE,
- },
- {
- .flags = QCE_ALG_3DES | QCE_MODE_ECB,
- .name = "ecb(des3_ede)",
- .drv_name = "ecb-3des-qce",
- .blocksize = DES3_EDE_BLOCK_SIZE,
- .ivsize = 0,
- .min_keysize = DES3_EDE_KEY_SIZE,
- .max_keysize = DES3_EDE_KEY_SIZE,
- },
- {
- .flags = QCE_ALG_3DES | QCE_MODE_CBC,
- .name = "cbc(des3_ede)",
- .drv_name = "cbc-3des-qce",
- .blocksize = DES3_EDE_BLOCK_SIZE,
- .ivsize = DES3_EDE_BLOCK_SIZE,
- .min_keysize = DES3_EDE_KEY_SIZE,
- .max_keysize = DES3_EDE_KEY_SIZE,
- },
};
static int qce_skcipher_register_one(const struct qce_skcipher_def *def,
@@ -455,9 +364,7 @@ static int qce_skcipher_register_one(con
alg->ivsize = def->ivsize;
alg->min_keysize = def->min_keysize;
alg->max_keysize = def->max_keysize;
- alg->setkey = IS_3DES(def->flags) ? qce_des3_setkey :
- IS_DES(def->flags) ? qce_des_setkey :
- qce_skcipher_setkey;
+ alg->setkey = qce_skcipher_setkey;
alg->encrypt = qce_skcipher_encrypt;
alg->decrypt = qce_skcipher_decrypt;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 74/83] KVM: s390: vsie: zero stale crypto bits
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (72 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 73/83] crypto: qce - Remove unsafe/deprecated algorithms Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 75/83] usb: core: Add lock to usb_wakeup_notification() Greg Kroah-Hartman
` (17 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Christian Borntraeger,
Claudio Imbrenda
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Borntraeger <borntraeger@linux.ibm.com>
commit 34d5b5b646c91cfb9338d7a12c955a70ffb8c66b upstream.
When shadowing crypto access bits from a format0 apcb (crycb 0 or 1),
the bits 64..255 are unchanged from whatever is in the vsie page in the
crycb and thus in the apcb. This gives a nested guest potential access
to a device no longer available. Zero out the remaining bits.
Fixes: 6b79de4b056e ("KVM: s390: vsie: allow guest FORMAT-1 CRYCB on host FORMAT-2")
Cc: stable@vger.kernel.org
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260811153738.206885-3-borntraeger@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/s390/kvm/vsie.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -184,6 +184,7 @@ static int setup_apcb10(struct kvm_vcpu
sizeof(struct kvm_s390_apcb0)))
return -EFAULT;
+ memset(apcb_s, 0, sizeof(*apcb_s));
apcb_s->apm[0] = apcb_h->apm[0] & tmp.apm[0];
apcb_s->aqm[0] = apcb_h->aqm[0] & tmp.aqm[0] & 0xffff000000000000UL;
apcb_s->adm[0] = apcb_h->adm[0] & tmp.adm[0] & 0xffff000000000000UL;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 75/83] usb: core: Add lock to usb_wakeup_notification()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (73 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 74/83] KVM: s390: vsie: zero stale crypto bits Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 76/83] usb: core: Strengthen error handling in hub_hub_status() Greg Kroah-Hartman
` (16 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Griffin Kroah-Hartman
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Griffin Kroah-Hartman <griffin@kroah.com>
commit e263e18a9e7b1ff3e7301f0801c6ff87c31adfb6 upstream.
Add a spin lock to usb_wakeup notification to prevent a race condition
with dereferencing freed memory. This could be hit by the xHCI driver as
it calls this function from an IRQ and could race with the
hub_disconnect() function, which properly grabs this lock to protect the
state of the device.
Assisted-by: gkh_clanker_t1000
Signed-off-by: Griffin Kroah-Hartman <griffin@kroah.com>
Link: https://patch.msgid.link/20260713-usb_core_patches_1-v1-3-7721c2b33f53@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/core/hub.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -757,10 +757,12 @@ void usb_wakeup_notification(struct usb_
{
struct usb_hub *hub;
struct usb_port *port_dev;
+ unsigned long flags;
if (!hdev)
return;
+ spin_lock_irqsave(&device_state_lock, flags);
hub = usb_hub_to_struct_hub(hdev);
if (hub) {
port_dev = hub->ports[portnum - 1];
@@ -770,6 +772,7 @@ void usb_wakeup_notification(struct usb_
set_bit(portnum, hub->wakeup_bits);
kick_hub_wq(hub);
}
+ spin_unlock_irqrestore(&device_state_lock, flags);
}
EXPORT_SYMBOL_GPL(usb_wakeup_notification);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 76/83] usb: core: Strengthen error handling in hub_hub_status()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (74 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 75/83] usb: core: Add lock to usb_wakeup_notification() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 77/83] ALSA: usb-audio: fix OOB write in snd_usbmidi_novation_output() Greg Kroah-Hartman
` (15 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Griffin Kroah-Hartman
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Griffin Kroah-Hartman <griffin@kroah.com>
commit a29496745aa335d97f617385809583241e118610 upstream.
Add additional error handling after the call to get_hub_status() in
hub_hub_status().
get_hub_status() uses usb_control_msg() which does not verify that the
message is the correct length, substituting it for
usb_control_msg_recv() would also solve this issue but increase memory
allocations.
Instead, error handling is copied from the method used in
hub_ext_port_status(), which shares the same flow of logic as
hub_hub_status().
Assisted-by: gkh_clanker_t1000
Signed-off-by: Griffin Kroah-Hartman <griffin@kroah.com>
Link: https://patch.msgid.link/20260722-usb_core_patches_2-v3-1-87622252bfdd@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/core/hub.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -998,10 +998,12 @@ static int hub_hub_status(struct usb_hub
mutex_lock(&hub->status_mutex);
ret = get_hub_status(hub->hdev, &hub->status->hub);
- if (ret < 0) {
+ if (ret < (int)sizeof(hub->status->hub)) {
if (ret != -ENODEV)
dev_err(hub->intfdev,
"%s failed (err = %d)\n", __func__, ret);
+ if (ret >= 0)
+ ret = -EIO;
} else {
*status = le16_to_cpu(hub->status->hub.wHubStatus);
*change = le16_to_cpu(hub->status->hub.wHubChange);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 77/83] ALSA: usb-audio: fix OOB write in snd_usbmidi_novation_output()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (75 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 76/83] usb: core: Strengthen error handling in hub_hub_status() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 78/83] ALSA: usb-audio: Complete cleanup after system-resume errors Greg Kroah-Hartman
` (14 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Marouane El Moufid, Takashi Iwai
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marouane El Moufid <eun0us@espilon.net>
commit 1035a8f63bae28e498b0e7b5ac91d749844a7158 upstream.
snd_usbmidi_novation_output() lays out a two-byte header at
transfer_buffer[0..1] and passes &transfer_buffer[2] together with a
length of ep->max_transfer - 2 to snd_rawmidi_transmit():
count = snd_rawmidi_transmit(ep->ports[0].substream,
&transfer_buffer[2],
ep->max_transfer - 2);
ep->max_transfer comes from the output endpoint's wMaxPacketSize via
usb_maxpacket(). A malformed or malicious device can advertise a bulk
OUT endpoint with a wMaxPacketSize of 1 - the USB core only clamps this
value downwards - so ep->max_transfer becomes 1 and the count argument
becomes -1.
snd_rawmidi_transmit() passes the negative count on to
__snd_rawmidi_transmit_peek(), where "if (count1 > count) count1 = count"
leaves count1 negative; get_aligned_size() keeps it negative for a
byte-stream substream, so the following memcpy(buffer, ..., count1) runs
with a (size_t)-1 length and writes far past the transfer buffer, which
was allocated with usb_alloc_coherent(ep->max_transfer).
This is the same class of bug that was fixed for snd_usbmidi_akai_output()
in commit 0970274613fb ("ALSA: usb-audio: fix OOB write in
snd_usbmidi_akai_output()"); the novation output routine was left
unguarded. Bail out when the endpoint cannot hold the two-byte header
plus at least one payload byte.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Marouane El Moufid <eun0us@espilon.net>
Link: https://patch.msgid.link/178749334830.543645.13722252148340572274@espilon.net
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/midi.c | 2 ++
1 file changed, 2 insertions(+)
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -871,6 +871,8 @@ static void snd_usbmidi_novation_output(
if (!ep->ports[0].active)
return;
+ if (ep->max_transfer < 3)
+ return;
transfer_buffer = urb->transfer_buffer;
count = snd_rawmidi_transmit(ep->ports[0].substream,
&transfer_buffer[2],
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 78/83] ALSA: usb-audio: Complete cleanup after system-resume errors
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (76 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 77/83] ALSA: usb-audio: fix OOB write in snd_usbmidi_novation_output() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 79/83] USB: serial: option: fix slab OOB read in interrupt URB callback Greg Kroah-Hartman
` (13 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Will Porter, Takashi Iwai
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Will Porter <mrwillporter@gmail.com>
commit 1739a976312e110c93a8dee66a1cdf893a1b187e upstream.
A failed system resume can leave the card unusable until reboot.
usb_audio_resume() jumps to err_out when snd_usb_pcm_resume() or
snd_usb_mixer_resume() fails. The error path skips the out: block, which
restores D0 and decrements chip->num_suspended_intf.
The card stays in SNDRV_CTL_POWER_D3hot, so later control access blocks in
snd_power_ref_and_wait(). USB core logs an interface resume callback error.
It does not retry that callback, so a later callback cannot complete the
skipped cleanup.
usb_audio_suspend() increments num_suspended_intf before returning success.
A system-resume callback must consume the system-suspend count even if a
component resume fails. Otherwise, the stranded count skews later suspend
and resume cycles.
Do not apply this cleanup to runtime-resume errors. Runtime PM can retry
-EAGAIN or -EBUSY without another suspend callback. The count must continue
to describe that suspended interface. Other runtime-resume errors latch
runtime_error in the PM core and do not cause an immediate callback retry.
Both parts of the system-resume error path are longstanding. Commit
88a8516a2128a ("ALSA: usbaudio: implement USB autosuspend") introduced
err_out past the D0 restore. Commit 862b2509d157c ("ALSA: usb-audio: Fix
inconsistent card PM state after resume") later moved
num_suspended_intf-- into the out: block. The error path now skips both
operations.
No third-party code is needed to reach the error path.
snd_usb_mixer_resume() ends in snd_usb_mixer_activate(), which returns the
result of usb_submit_urb() for devices that have a mixer status URB. Its
mixer->private_resume hook can also fail through scarlett2_init_notify().
snd_usb_pcm_resume() issues a SET_CUR request to a UAC3 power domain. It
can return -EPIPE or -EIO when the device stalls the request.
Route a component error through out: only when system_suspend is nonzero.
Continue to return runtime-resume errors through err_out. Later component
resume stages remain skipped. The original error still reaches USB core.
A later transfer can fail if the device did not recover.
I reproduced the system-resume failure on an Audient iD14 MkI with an
out-of-tree diagnostic mixer resume hook. An injected -EIO on the unpatched
core left control readers in uninterruptible sleep in
snd_power_ref_and_wait() until a reboot. With this patch, the same failure
restored control access. A second system suspend and resume also succeeded
after I disabled fault injection.
Assisted-by: Claude:claude-opus-5
Assisted-by: Antigravity:gemini-3.1-pro-high
Assisted-by: Codex:gpt-5.6-sol
Fixes: 88a8516a2128a ("ALSA: usbaudio: implement USB autosuspend")
Fixes: 862b2509d157c ("ALSA: usb-audio: Fix inconsistent card PM state after resume")
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Porter <mrwillporter@gmail.com>
Link: https://patch.msgid.link/20260824225757.26749-1-mrwillporter@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/card.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -1278,8 +1278,11 @@ static int usb_audio_resume(struct usb_i
list_for_each_entry(as, &chip->pcm_list, list) {
err = snd_usb_pcm_resume(as);
- if (err < 0)
- goto err_out;
+ if (err < 0) {
+ if (!chip->system_suspend)
+ goto err_out;
+ goto out;
+ }
}
/*
@@ -1288,8 +1291,11 @@ static int usb_audio_resume(struct usb_i
*/
list_for_each_entry(mixer, &chip->mixer_list, list) {
err = snd_usb_mixer_resume(mixer);
- if (err < 0)
- goto err_out;
+ if (err < 0) {
+ if (!chip->system_suspend)
+ goto err_out;
+ goto out;
+ }
}
list_for_each(p, &chip->midi_list) {
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 79/83] USB: serial: option: fix slab OOB read in interrupt URB callback
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (77 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 78/83] ALSA: usb-audio: Complete cleanup after system-resume errors Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 80/83] USB: serial: spcp8x5: drop broken carrier detect support Greg Kroah-Hartman
` (12 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Jiale Yao, Johan Hovold
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiale Yao <yaojiale02@163.com>
commit 885d802f544ca7bfa8f3984d94233cce715bb6b3 upstream.
The interrupt URB buffer is allocated in setup_port_interrupt_in() based
on the endpoint's wMaxPacketSize:
buffer_size = usb_endpoint_maxp(epd);
port->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
When a USB device declares wMaxPacketSize = 8 on its interrupt IN
endpoint, the buffer is allocated from kmalloc-8 cache (exactly
8 bytes).
If the device sends a short packet (actual_length < wMaxPacketSize),
the URB completes with status == 0 and the callback proceeds to read:
data[sizeof(struct usb_ctrlrequest)]
which evaluates to data[8], accessing 1 byte beyond the allocated 8-byte
buffer. This results in a slab out-of-bounds read.
Fix this by adding the missing bounds check: first verify that the
actual length is large enough to contain the struct usb_ctrlrequest
header before accessing req_pkt->bRequestType and req_pkt->bRequest,
and then verify that there is an additional byte for the modem signal
state before reading data[sizeof(struct usb_ctrlrequest)] inside the
conditional. Use sizeof(*req_pkt) instead of sizeof(struct
usb_ctrlrequest) for consistency.
Assisted-by: Claude:deepseek-v4-pro
Signed-off-by: Jiale Yao <yaojiale02@163.com>
Fixes: 58cfe9113e48 ("[PATCH] USB: add Option Card driver")
Cc: stable@vger.kernel.org # v2.6.12
[ johan: use dev_err(); split signals declaration and initialisation ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/option.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2690,12 +2690,26 @@ static void option_instat_callback(struc
dev_dbg(dev, "%s: NULL req_pkt\n", __func__);
return;
}
+
+ if (urb->actual_length < sizeof(*req_pkt)) {
+ dev_err(dev, "%s: short packet: %u bytes\n", __func__,
+ urb->actual_length);
+ return;
+ }
+
if ((req_pkt->bRequestType == 0xA1) &&
(req_pkt->bRequest == 0x20)) {
+ unsigned char signals;
int old_dcd_state;
- unsigned char signals = *((unsigned char *)
- urb->transfer_buffer +
- sizeof(struct usb_ctrlrequest));
+
+ if (urb->actual_length < sizeof(*req_pkt) + 1) {
+ dev_err(dev, "%s: short interrupt transfer: %u bytes\n",
+ __func__, urb->actual_length);
+ return;
+ }
+
+ signals = *((unsigned char *)urb->transfer_buffer +
+ sizeof(*req_pkt));
dev_dbg(dev, "%s: signal x%x\n", __func__, signals);
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 80/83] USB: serial: spcp8x5: drop broken carrier detect support
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (78 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 79/83] USB: serial: option: fix slab OOB read in interrupt URB callback Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 81/83] USB: c67x00: fix use-after-free in c67x00_add_iso_urb() Greg Kroah-Hartman
` (11 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable
Cc: Greg Kroah-Hartman, patches, syzbot+3b514b87202742f22c44,
Johan Hovold
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@kernel.org>
commit d37186bd95a07e334447f47274a38a311dad2172 upstream.
The driver does not support modem status notifications and instead used
to fetch the modem status once at open() and subsequently operate on and
report stale state.
As part of fixing this, a call to fetch the status was added to
carrier_raised(), which does not work as that callback must not sleep
(e.g. unlike tiocmget()).
Drop the broken carrier detect support.
Fixes: e1ed212d8593 ("USB: spcp8x5: add proper modem-status support")
Cc: stable@vger.kernel.org # 3.10
Reported-by: syzbot+3b514b87202742f22c44@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/6a73cea2.01d0871a.3a0d52.000d.GAE@google.com
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/spcp8x5.c | 13 -------------
1 file changed, 13 deletions(-)
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -237,18 +237,6 @@ static void spcp8x5_set_work_mode(struct
dev_err(&port->dev, "failed to set work mode: %d\n", ret);
}
-static int spcp8x5_carrier_raised(struct usb_serial_port *port)
-{
- u8 msr;
- int ret;
-
- ret = spcp8x5_get_msr(port, &msr);
- if (ret || msr & MSR_STATUS_LINE_DCD)
- return 1;
-
- return 0;
-}
-
static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
{
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
@@ -460,7 +448,6 @@ static struct usb_serial_driver spcp8x5_
.num_bulk_out = 1,
.open = spcp8x5_open,
.dtr_rts = spcp8x5_dtr_rts,
- .carrier_raised = spcp8x5_carrier_raised,
.set_termios = spcp8x5_set_termios,
.init_termios = spcp8x5_init_termios,
.tiocmget = spcp8x5_tiocmget,
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 81/83] USB: c67x00: fix use-after-free in c67x00_add_iso_urb()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (79 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 80/83] USB: serial: spcp8x5: drop broken carrier detect support Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 82/83] wifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb Greg Kroah-Hartman
` (10 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Shuangpeng Bai
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
commit b1e24de475bf2d66fffc9103f3444b783527d55a upstream.
When TD creation fails for the last packet of an isochronous URB,
c67x00_add_iso_urb() gives the URB back before updating the endpoint
scheduling state.
c67x00_giveback_urb() frees the URB private data, and the completion
callback may release the final URB reference. The following accesses to
urbp->ep_data, urb->interval, and urbp->cnt can therefore use freed
memory.
Update next_frame and cnt before giving back the failed final packet,
making the giveback the last operation that uses the URB and its private
data.
Fixes: e9b29ffc519b ("USB: add Cypress c67x00 OTG controller HCD driver")
Cc: stable@vger.kernel.org
Signed-off-by: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
Link: https://patch.msgid.link/20260806013502.322067-1-shuangpeng.kernel@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/c67x00/c67x00-sched.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/c67x00/c67x00-sched.c
+++ b/drivers/usb/c67x00/c67x00-sched.c
@@ -761,13 +761,13 @@ static int c67x00_add_iso_urb(struct c67
ret);
urb->iso_frame_desc[urbp->cnt].actual_length = 0;
urb->iso_frame_desc[urbp->cnt].status = ret;
- if (urbp->cnt + 1 == urb->number_of_packets)
- c67x00_giveback_urb(c67x00, urb, 0);
}
urbp->ep_data->next_frame =
frame_add(urbp->ep_data->next_frame, urb->interval);
urbp->cnt++;
+ if (ret && urbp->cnt == urb->number_of_packets)
+ c67x00_giveback_urb(c67x00, urb, 0);
}
return 0;
}
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 82/83] wifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (80 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 81/83] USB: c67x00: fix use-after-free in c67x00_add_iso_urb() Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 13:34 ` [PATCH 6.18 83/83] usb: usbfs: fix use-after-free of usb_device in usbdev_release() Greg Kroah-Hartman
` (9 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Devin Wittmayer, Felix Fietkau
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Devin Wittmayer <lucid_duck@justthetip.ca>
commit ef3e34874d2332d0f63e72c2c35ce5c93568c125 upstream.
mt7925_usb_sdio_tx_prepare_skb() pushes a TX descriptor and a USB
header onto every skb and assumes the headroom for them is already
there. That holds for locally generated traffic, where mac80211
reserves hw->extra_tx_headroom, but forwarded frames are sent through
ieee80211_8023_xmit(), which does not reserve it. Bridge a wired
interface to an mt7925u AP and the first forwarded frame that arrives
short panics the kernel:
skbuff: skb_under_panic: len:415 put:4 tail:0x19b end:0x640 dev:wlan1
kernel BUG at net/core/skbuff.c:212!
Call trace:
skb_panic+0x58/0x60 (P)
skb_push+0x58/0x60
mt7925_usb_sdio_tx_prepare_skb+0xf8/0x1b8 [mt7925_common]
mt76u_tx_queue_skb+0xa0/0x1f8 [mt76_usb]
__mt76_tx_queue_skb+0x54/0xe8 [mt76]
mt76_txq_schedule.part.0+0x204/0x478 [mt76]
mt76_txq_schedule_all+0x50/0x80 [mt76]
mt792x_tx_worker+0x68/0x100 [mt792x_lib]
__mt76_worker_fn+0x84/0x150 [mt76]
Whether a given setup hits it depends on how much headroom the ingress
netdev leaves in its rx skbs. Reproduced on a Raspberry Pi 5 bridging
onboard ethernet to a Netgear A9000; originally reported on an MT7986
router running OpenWrt. Nick Morrow's testing on a Pi 4 (bcmgenet),
which leaves more headroom, helped narrow the trigger to the ingress
path.
The same bug was fixed on mt7921 by commit 98c4d0abf5c4 ("mt76:
mt7921: don't assume adequate headroom for SDIO headers"), but mt7925
was copied from mt7921 without the fix. Add the same guard here.
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Cc: stable@vger.kernel.org
Link: https://github.com/morrownr/mt76/issues/52
Signed-off-by: Devin Wittmayer <lucid_duck@justthetip.ca>
Link: https://patch.msgid.link/20260715023348.59506-1-lucid_duck@justthetip.ca
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/mediatek/mt76/mt7925/mac.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mac.c
@@ -1425,6 +1425,10 @@ int mt7925_usb_sdio_tx_prepare_skb(struc
if (!wcid)
wcid = &dev->mt76.global_wcid;
+ err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
+ if (err)
+ return err;
+
if (sta) {
struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
^ permalink raw reply [flat|nested] 93+ messages in thread* [PATCH 6.18 83/83] usb: usbfs: fix use-after-free of usb_device in usbdev_release()
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (81 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 82/83] wifi: mt76: mt7925: ensure tx headroom in usb_sdio_tx_prepare_skb Greg Kroah-Hartman
@ 2026-08-31 13:34 ` Greg Kroah-Hartman
2026-08-31 17:02 ` [PATCH 6.18 00/83] 6.18.49-rc1 review Wentao Guan
` (8 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Greg Kroah-Hartman @ 2026-08-31 13:34 UTC (permalink / raw)
To: stable; +Cc: Greg Kroah-Hartman, patches, Miguel Peñaranda, Alan Stern
6.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Miguel Peñaranda <mig.penaranda07@gmail.com>
commit 0dd68b5d01d022fc9c5e71c82a82b0a94d3d0671 upstream.
usbdev_release() drops its reference to the struct usb_device before
draining the list of completed async URBs, but that drain path reads back
through the same object: free_async() calls dec_usb_memory_use_count()
for any URB whose buffer came from the usbfs mmap() region, and its first
statement is bus_to_hcd(ps->dev->bus).
After a disconnect the usbfs reference can be the last one, in which case
usb_put_dev() frees the device and the subsequent loop reads offset 80 of
freed memory and uses the result as a struct usb_hcd *, which
hcd_buffer_free_pages() then dereferences.
This is reachable by an unprivileged process that has read/write access to
a /dev/bus/usb node: mmap() the fd, submit one URB with a buffer inside the
mapping, wait for the device to be unplugged, then munmap() and close().
It reproduces on every attempt rather than being a race, because a live
MAP_SHARED vma holds a reference on the struct file, so usbdev_release()
cannot run until the last vma is gone and the freeing branch of
dec_usb_memory_use_count() is always taken.
BUG: KASAN: slab-use-after-free in dec_usb_memory_use_count+0x3ae/0x410
Read of size 8 at addr ffff8880122ee050 by task poc/769
CPU: 1 UID: 1000 PID: 769 Comm: poc Tainted: G B 6.12.94 #3
Call Trace:
dec_usb_memory_use_count+0x3ae/0x410
free_async+0x2aa/0x4f0
usbdev_release+0x375/0x460
__fput+0x3ea/0xb50
__x64_sys_close+0x86/0x100
Allocated by task 11:
usb_alloc_dev+0x55/0xd90
hub_event+0x2524/0x43d0
Freed by task 769:
kfree+0x121/0x360
device_release+0xd2/0x280
usb_put_dev+0x23/0x30
usbdev_release+0x2d8/0x460
Release the device reference after the drain loop instead. Nothing between
the two points requires it to have been dropped.
Fixes: f7d34b445abc ("USB: Add support for usbfs zerocopy.")
Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-5
Signed-off-by: Miguel Peñaranda <mig.penaranda07@gmail.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://patch.msgid.link/20260810121209.795089-1-mig.penaranda07@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/core/devio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1113,7 +1113,6 @@ static int usbdev_release(struct inode *
if (!ps->suspend_allowed)
usb_autosuspend_device(dev);
usb_unlock_device(dev);
- usb_put_dev(dev);
put_pid(ps->disc_pid);
put_cred(ps->cred);
@@ -1122,6 +1121,7 @@ static int usbdev_release(struct inode *
free_async(as);
as = async_getcompleted(ps);
}
+ usb_put_dev(dev);
kfree(ps);
return 0;
^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (82 preceding siblings ...)
2026-08-31 13:34 ` [PATCH 6.18 83/83] usb: usbfs: fix use-after-free of usb_device in usbdev_release() Greg Kroah-Hartman
@ 2026-08-31 17:02 ` Wentao Guan
2026-08-31 19:12 ` Brett A C Sheffield
` (7 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Wentao Guan @ 2026-08-31 17:02 UTC (permalink / raw)
To: gregkh
Cc: achill, akpm, broonie, conor, f.fainelli, hargar, jonathanh,
linux-kernel, linux, lkft-triage, patches, patches, pavel,
rwarsow, shuah, sr, stable, sudipm.mukherjee, torvalds,
Wentao Guan
Hi,
Build tested in our x86,arm64,loongarch,riscv config successfully without error.
Tested-by: Wentao Guan <guanwentao@uniontech.com>
Best Regards
Wentao Guan
Log:
Linux version 6.18.49-rc1-g52d189f2c6b3 (guanwentao@uos-PC) (aarch64-linux-gnu-gcc-12 (Deepin 12.3.0-17deepin8) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) # SMP PREEMPT_DYNAMIC
Linux version 6.18.49-rc1-g52d189f2c6b3 (guanwentao@uos-PC) (aarch64-linux-gnu-gcc-12 (Deepin 12.3.0-17deepin8) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) #2 SMP PREEMPT_DYNAMIC Tue Sep 1 00:20:48 CST 2026
Linux version 6.18.49-rc1-g52d189f2c6b3 (guanwentao@uos-PC) (loongarch64-linux-gnu-gcc-12 (Deepin 12.3.0-17deepin8) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) # SMP PREEMPT_DYNAMIC
Linux version 6.18.49-rc1-g52d189f2c6b3 (guanwentao@uos-PC) (loongarch64-linux-gnu-gcc-12 (Deepin 12.3.0-17deepin8) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) #3 SMP PREEMPT_DYNAMIC Tue Sep 1 00:37:39 CST 2026
Linux version 6.18.49-rc1+ (guanwentao@uos-PC) (riscv64-linux-gnu-gcc-12 (Deepin 12.3.0-17deepin8) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) # SMP PREEMPT
Linux version 6.18.49-rc1+ (guanwentao@uos-PC) (riscv64-linux-gnu-gcc-12 (Deepin 12.3.0-17deepin8) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) #4 SMP PREEMPT Tue Sep 1 00:54:32 CST 2026
Linux version 6.18.49-rc1-g52d189f2c6b3 (guanwentao@uos-PC) (gcc (Deepin 12.3.0-17deepin18) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) # SMP PREEMPT_DYNAMIC
Linux version 6.18.49-rc1-g52d189f2c6b3 (guanwentao@uos-PC) (gcc (Deepin 12.3.0-17deepin18) 12.3.0, GNU ld (GNU Binutils for Deepin) 2.41) #1 SMP PREEMPT_DYNAMIC Mon Aug 31 23:58:15 CST 2026
^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (83 preceding siblings ...)
2026-08-31 17:02 ` [PATCH 6.18 00/83] 6.18.49-rc1 review Wentao Guan
@ 2026-08-31 19:12 ` Brett A C Sheffield
2026-08-31 23:03 ` Peter Schneider
` (6 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Brett A C Sheffield @ 2026-08-31 19:12 UTC (permalink / raw)
To: gregkh
Cc: stable, patches, linux-kernel, torvalds, akpm, linux, shuah,
patches, lkft-triage, pavel, jonathanh, f.fainelli,
sudipm.mukherjee, rwarsow, conor, hargar, broonie, achill, sr,
Brett A C Sheffield
# Librecast Test Results
020/020 [ OK ] liblcrq
010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast
CPU/kernel: Linux auntie 6.18.49-rc1-g52d189f2c6b3 #1 SMP PREEMPT_DYNAMIC Mon Aug 31 18:39:24 -00 2026 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux
Tested-by: Brett A C Sheffield <bacs@librecast.net>
^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (84 preceding siblings ...)
2026-08-31 19:12 ` Brett A C Sheffield
@ 2026-08-31 23:03 ` Peter Schneider
2026-09-01 0:15 ` Florian Fainelli
` (5 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Peter Schneider @ 2026-08-31 23:03 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 31.08.2026 um 15:33 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (85 preceding siblings ...)
2026-08-31 23:03 ` Peter Schneider
@ 2026-09-01 0:15 ` Florian Fainelli
2026-09-01 8:43 ` Pavel Machek
` (4 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Florian Fainelli @ 2026-09-01 0:15 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 8/31/2026 6:33 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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, 02 Sep 2026 13:32:19 +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-6.18.49-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-6.18.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] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (86 preceding siblings ...)
2026-09-01 0:15 ` Florian Fainelli
@ 2026-09-01 8:43 ` Pavel Machek
2026-09-01 16:44 ` Shuah Khan
` (3 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Pavel Machek @ 2026-09-01 8:43 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
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Hi!
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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-6.18.y
Tested-by: Pavel Machek (CIP) <pavel@nabladev.com>
Best regards,
Pavel
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^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (87 preceding siblings ...)
2026-09-01 8:43 ` Pavel Machek
@ 2026-09-01 16:44 ` Shuah Khan
2026-09-01 22:33 ` Miguel Ojeda
` (2 subsequent siblings)
91 siblings, 0 replies; 93+ messages in thread
From: Shuah Khan @ 2026-09-01 16:44 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, Shuah Khan
On 8/31/26 07:33, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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, 02 Sep 2026 13:32:19 +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-6.18.49-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-6.18.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>
Compiled and booted on my test system. No dmesg regressions.
Tested-by: Shuah Khan <skhan@linuxfoundation.org>
thanks,
-- Shuah
^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (88 preceding siblings ...)
2026-09-01 16:44 ` Shuah Khan
@ 2026-09-01 22:33 ` Miguel Ojeda
2026-09-01 23:05 ` Ron Economos
2026-09-02 7:44 ` Barry K. Nathan
91 siblings, 0 replies; 93+ messages in thread
From: Miguel Ojeda @ 2026-09-01 22:33 UTC (permalink / raw)
To: gregkh
Cc: achill, akpm, broonie, conor, f.fainelli, hargar, jonathanh,
linux-kernel, linux, lkft-triage, patches, patches, pavel,
rwarsow, shuah, sr, stable, sudipm.mukherjee, torvalds,
Miguel Ojeda
On Mon, 31 Aug 2026 15:33:36 +0200 Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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, 02 Sep 2026 13:32:19 +0000.
> Anything received after that time might be too late.
Boot-tested under QEMU for Rust x86_64, arm64 and riscv64; built-tested
for loongarch64 and arm32:
Tested-by: Miguel Ojeda <ojeda@kernel.org>
Thanks!
Cheers,
Miguel
^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (89 preceding siblings ...)
2026-09-01 22:33 ` Miguel Ojeda
@ 2026-09-01 23:05 ` Ron Economos
2026-09-02 7:44 ` Barry K. Nathan
91 siblings, 0 replies; 93+ messages in thread
From: Ron Economos @ 2026-09-01 23:05 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
On 8/31/26 06:33, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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, 02 Sep 2026 13:32:19 +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-6.18.49-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-6.18.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
Built and booted successfully on RISC-V RV64 (HiFive Unmatched).
Tested-by: Ron Economos <re@w6rz.net>
^ permalink raw reply [flat|nested] 93+ messages in thread* Re: [PATCH 6.18 00/83] 6.18.49-rc1 review
2026-08-31 13:33 [PATCH 6.18 00/83] 6.18.49-rc1 review Greg Kroah-Hartman
` (90 preceding siblings ...)
2026-09-01 23:05 ` Ron Economos
@ 2026-09-02 7:44 ` Barry K. Nathan
91 siblings, 0 replies; 93+ messages in thread
From: Barry K. Nathan @ 2026-09-02 7:44 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
On 8/31/26 6:33 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.18.49 release.
> There are 83 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, 02 Sep 2026 13:32:19 +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-6.18.49-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-6.18.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
Tested on an amd64 laptop (Lenovo ThinkPad T14 Gen 1). Working well,
no regressions observed.
Tested-by: Barry K. Nathan <barryn@pobox.com>
--
-Barry K. Nathan <barryn@pobox.com>
^ permalink raw reply [flat|nested] 93+ messages in thread