From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Stanislav Fomichev <sdf@google.com>,
Paul Mackerras <paulus@samba.org>,
linux-ppp@vger.kernel.org,
syzbot+41cab52ab62ee99ed24a@syzkaller.appspotmail.com,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
netdev@vger.kernel.org, bpf@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 31/46] ppp: associate skb with a device at tx
Date: Sun, 18 Dec 2022 11:12:29 -0500 [thread overview]
Message-ID: <20221218161244.930785-31-sashal@kernel.org> (raw)
In-Reply-To: <20221218161244.930785-1-sashal@kernel.org>
From: Stanislav Fomichev <sdf@google.com>
[ Upstream commit 9f225444467b98579cf28d94f4ad053460dfdb84 ]
Syzkaller triggered flow dissector warning with the following:
r0 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0802, 0x0)
ioctl$PPPIOCNEWUNIT(r0, 0xc004743e, &(0x7f00000000c0))
ioctl$PPPIOCSACTIVE(r0, 0x40107446, &(0x7f0000000240)={0x2, &(0x7f0000000180)=[{0x20, 0x0, 0x0, 0xfffff034}, {0x6}]})
pwritev(r0, &(0x7f0000000040)=[{&(0x7f0000000140)='\x00!', 0x2}], 0x1, 0x0, 0x0)
[ 9.485814] WARNING: CPU: 3 PID: 329 at net/core/flow_dissector.c:1016 __skb_flow_dissect+0x1ee0/0x1fa0
[ 9.485929] skb_get_poff+0x53/0xa0
[ 9.485937] bpf_skb_get_pay_offset+0xe/0x20
[ 9.485944] ? ppp_send_frame+0xc2/0x5b0
[ 9.485949] ? _raw_spin_unlock_irqrestore+0x40/0x60
[ 9.485958] ? __ppp_xmit_process+0x7a/0xe0
[ 9.485968] ? ppp_xmit_process+0x5b/0xb0
[ 9.485974] ? ppp_write+0x12a/0x190
[ 9.485981] ? do_iter_write+0x18e/0x2d0
[ 9.485987] ? __import_iovec+0x30/0x130
[ 9.485997] ? do_pwritev+0x1b6/0x240
[ 9.486016] ? trace_hardirqs_on+0x47/0x50
[ 9.486023] ? __x64_sys_pwritev+0x24/0x30
[ 9.486026] ? do_syscall_64+0x3d/0x80
[ 9.486031] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd
Flow dissector tries to find skb net namespace either via device
or via socket. Neigher is set in ppp_send_frame, so let's manually
use ppp->dev.
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-ppp@vger.kernel.org
Reported-by: syzbot+41cab52ab62ee99ed24a@syzkaller.appspotmail.com
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ppp/ppp_generic.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index 829d6ada1704..c1f11d1df4cd 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1742,6 +1742,8 @@ ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
int len;
unsigned char *cp;
+ skb->dev = ppp->dev;
+
if (proto < 0x8000) {
#ifdef CONFIG_PPP_FILTER
/* check if we should pass this packet */
--
2.35.1
next prev parent reply other threads:[~2022-12-18 16:42 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-18 16:11 [PATCH AUTOSEL 5.15 01/46] drm/etnaviv: add missing quirks for GC300 Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 02/46] media: imx-jpeg: Disable useless interrupt to avoid kernel panic Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 03/46] brcmfmac: return error when getting invalid max_flowrings from dongle Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 04/46] wifi: ath9k: verify the expected usb_endpoints are present Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 05/46] wifi: ar5523: Fix use-after-free on ar5523_cmd() timed out Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 06/46] ASoC: codecs: rt298: Add quirk for KBL-R RVP platform Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 07/46] ipmi: fix memleak when unload ipmi driver Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 08/46] drm/amd/display: prevent memory leak Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 09/46] Revert "drm/amd/display: Limit max DSC target bpp for specific monitors" Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 10/46] qed (gcc13): use u16 for fid to be big enough Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 11/46] bpf: make sure skb->len != 0 when redirecting to a tunneling device Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 12/46] net: ethernet: ti: Fix return type of netcp_ndo_start_xmit() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 13/46] hamradio: baycom_epp: Fix return type of baycom_send_packet() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 14/46] wifi: brcmfmac: Fix potential shift-out-of-bounds in brcmf_fw_alloc_request() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 15/46] igb: Do not free q_vector unless new one was allocated Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 16/46] drm/amdgpu: Fix type of second parameter in trans_msg() callback Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 17/46] drm/amdgpu: Fix type of second parameter in odn_edit_dpm_table() callback Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 18/46] s390/ctcm: Fix return type of ctc{mp,}m_tx() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 19/46] s390/netiucv: Fix return type of netiucv_tx() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 20/46] s390/lcs: Fix return type of lcs_start_xmit() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 21/46] drm/msm: Use drm_mode_copy() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 22/46] drm/rockchip: " Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 23/46] drm/sti: " Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 24/46] drm/mediatek: Fix return type of mtk_hdmi_bridge_mode_valid() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 25/46] drivers/md/md-bitmap: check the return value of md_bitmap_get_counter() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 26/46] md/raid1: stop mdx_raid1 thread when raid1 array run failed Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 27/46] drm/amd/display: fix array index out of bound error in bios parser Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 28/46] net: add atomic_long_t to net_device_stats fields Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 29/46] ipv6/sit: use DEV_STATS_INC() to avoid data-races Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 30/46] mrp: introduce active flags to prevent UAF when applicant uninit Sasha Levin
2022-12-18 16:12 ` Sasha Levin [this message]
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 32/46] bpf: Prevent decl_tag from being referenced in func_proto arg Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 33/46] ethtool: avoiding integer overflow in ethtool_phys_id() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 34/46] media: dvb-frontends: fix leak of memory fw Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 35/46] media: dvbdev: adopts refcnt to avoid UAF Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 36/46] media: dvb-usb: fix memory leak in dvb_usb_adapter_init() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 37/46] blk-mq: fix possible memleak when register 'hctx' failed Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 38/46] drm/amd/display: Use the largest vready_offset in pipe group Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 39/46] libbpf: Avoid enum forward-declarations in public API in C++ mode Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 40/46] regulator: core: fix use_count leakage when handling boot-on Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 41/46] net: dpaa2: publish MAC stringset to ethtool -S even if MAC is missing Sasha Levin
2022-12-19 11:54 ` Vladimir Oltean
2022-12-24 0:29 ` Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 42/46] wifi: mt76: do not run mt76u_status_worker if the device is not running Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 43/46] mmc: f-sdh30: Add quirks for broken timeout clock capability Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 44/46] mmc: renesas_sdhi: better reset from HS400 mode Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 45/46] media: si470x: Fix use-after-free in si470x_int_in_callback() Sasha Levin
2022-12-18 16:12 ` [PATCH AUTOSEL 5.15 46/46] clk: st: Fix memory leak in st_of_quadfs_setup() Sasha Levin
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