audit: type=1326 audit(1631047533.706:519): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=16887 comm="syz-executor.5" exe="/root/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
==================================================================
BUG: KCSAN: data-race in kauditd_thread / skb_queue_tail

write to 0xffffffff84172b48 of 4 bytes by task 16892 on cpu 1:
 __skb_insert include/linux/skbuff.h:1943 [inline]
 __skb_queue_before include/linux/skbuff.h:2048 [inline]
 __skb_queue_tail include/linux/skbuff.h:2081 [inline]
 skb_queue_tail+0x80/0xa0 net/core/skbuff.c:3310
 audit_log_end+0x171/0x1e0 kernel/audit.c:2389
 audit_seccomp+0xd9/0xf0 kernel/auditsc.c:2684
 seccomp_log kernel/seccomp.c:985 [inline]
 __seccomp_filter+0xe07/0xe60 kernel/seccomp.c:1281
 __secure_computing+0xfb/0x140 kernel/seccomp.c:1311
 syscall_trace_enter+0x120/0x290 kernel/entry/common.c:68
 __syscall_enter_from_user_work kernel/entry/common.c:90 [inline]
 syscall_enter_from_user_mode+0x1c/0x20 kernel/entry/common.c:108
 do_syscall_64+0x1e/0x90 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffffff84172b48 of 4 bytes by task 25 on cpu 0:
 skb_queue_len include/linux/skbuff.h:1874 [inline]
 kauditd_thread+0x5b2/0x6c0 kernel/audit.c:881
 kthread+0x262/0x280 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

value changed: 0x00000001 -> 0x00000002

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25 Comm: kauditd Tainted: G        W         5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
kauditd_printk_skb: 187 callbacks suppressed
audit: type=1326 audit(1631047542.497:707): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.507:708): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=428 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.507:709): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.507:710): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=259 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.567:711): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.567:712): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.567:713): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=264 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.567:714): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.567:715): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x4665f9 code=0x7ffc0000
audit: type=1326 audit(1631047542.567:716): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:kernel_t:s0 pid=17503 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=157 compat=0 ip=0x4665f9 code=0x7ffc0000