syzbot

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BUG: KCSAN: data-race in audit_log_start / audit_receive

write to 0xffffffff88edf4d0 of 8 bytes by task 15109 on cpu 0:
 audit_ctl_unlock kernel/audit.c:253 [inline]
 audit_receive+0x2091/0x2200 kernel/audit.c:1617
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:742
 ____sys_sendmsg+0x31e/0x4a0 net/socket.c:2592
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2646
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2683 [inline]
 __se_sys_sendmsg net/socket.c:2681 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2681
 x64_sys_call+0x17ba/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd8/0x2a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff88edf4d0 of 8 bytes by task 15117 on cpu 1:
 audit_ctl_owner_current kernel/audit.c:266 [inline]
 audit_log_start+0x106/0x720 kernel/audit.c:1923
 audit_seccomp+0x48/0x100 kernel/auditsc.c:2971
 seccomp_log kernel/seccomp.c:1048 [inline]
 __seccomp_filter+0x843/0x1260 kernel/seccomp.c:1344
 __secure_computing+0x82/0x150 kernel/seccomp.c:1404
 syscall_trace_enter+0xcf/0x1e0 kernel/entry/syscall-common.c:44
 syscall_enter_from_user_mode_work include/linux/entry-common.h:78 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:109 [inline]
 do_syscall_64+0xb2/0x2a0 arch/x86/entry/syscall_64.c:90
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff88814397b180 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 15117 Comm: syz.4.15019 Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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