AI Score
Confidence
Low
EPSS
Percentile
13.0%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
In the Linux kernel, the following vulnerability has been resolved:
packet: annotate data-races around ignore_outgoing
ignore_outgoing is read locklessly from dev_queue_xmit_nit()
and packet_getsockopt()
Add appropriate READ_ONCE()/WRITE_ONCE() annotations.
syzbot reported:
BUG: KCSAN: data-race in dev_queue_xmit_nit / packet_setsockopt
write to 0xffff888107804542 of 1 bytes by task 22618 on cpu 0:
packet_setsockopt+0xd83/0xfd0 net/packet/af_packet.c:4003
do_sock_setsockopt net/socket.c:2311 [inline]
__sys_setsockopt+0x1d8/0x250 net/socket.c:2334
__do_sys_setsockopt net/socket.c:2343 [inline]
__se_sys_setsockopt net/socket.c:2340 [inline]
__x64_sys_setsockopt+0x66/0x80 net/socket.c:2340
do_syscall_64+0xd3/0x1d0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
read to 0xffff888107804542 of 1 bytes by task 27 on cpu 1:
dev_queue_xmit_nit+0x82/0x620 net/core/dev.c:2248
xmit_one net/core/dev.c:3527 [inline]
dev_hard_start_xmit+0xcc/0x3f0 net/core/dev.c:3547
__dev_queue_xmit+0xf24/0x1dd0 net/core/dev.c:4335
dev_queue_xmit include/linux/netdevice.h:3091 [inline]
batadv_send_skb_packet+0x264/0x300 net/batman-adv/send.c:108
batadv_send_broadcast_skb+0x24/0x30 net/batman-adv/send.c:127
batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline]
batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x3f0/0x4b0 net/batman-adv/bat_iv_ogm.c:1700
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335
worker_thread+0x526/0x730 kernel/workqueue.c:3416
kthread+0x1d1/0x210 kernel/kthread.c:388
ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
value changed: 0x00 -> 0x01
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 27 Comm: kworker/u8:1 Tainted: G W 6.8.0-syzkaller-08073-g480e035fc4c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "84c510411e32",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "68e84120319d",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "d35b62c224e7",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "ef7eed7e11d2",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "2c02c5059c78",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "ee413f30ec4f",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "8b1e273c6afc",
"versionType": "git"
},
{
"status": "affected",
"version": "fa788d986a3a",
"lessThan": "6ebfad33161a",
"versionType": "git"
}
],
"programFiles": [
"net/core/dev.c",
"net/packet/af_packet.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.20",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "5.4.273",
"versionType": "custom",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.214",
"versionType": "custom",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.153",
"versionType": "custom",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.83",
"versionType": "custom",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.23",
"versionType": "custom",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.11",
"versionType": "custom",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8.2",
"versionType": "custom",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/dev.c",
"net/packet/af_packet.c"
],
"defaultStatus": "affected"
}
]
git.kernel.org/stable/c/2c02c5059c78a52d170bdee4a369b470de6deb37
git.kernel.org/stable/c/68e84120319d4fc298fcdb14cf0bea6a0f64ffbd
git.kernel.org/stable/c/6ebfad33161afacb3e1e59ed1c2feefef70f9f97
git.kernel.org/stable/c/84c510411e321caff3c07e6cd0f917f06633cfc0
git.kernel.org/stable/c/8b1e273c6afcf00d3c40a54ada7d6aac1b503b97
git.kernel.org/stable/c/d35b62c224e70797f8a1c37fe9bc4b3e294b7560
git.kernel.org/stable/c/ee413f30ec4fe94a0bdf32c8f042cb06fa913234
git.kernel.org/stable/c/ef7eed7e11d23337310ecc2c014ecaeea52719c5
lists.debian.org/debian-lts-announce/2024/06/msg00017.html