syzbot

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BUG: KCSAN: data-race in audit_log_start / audit_receive

write to 0xffffffff88c161a0 of 8 bytes by task 9758 on cpu 0:
 audit_ctl_lock kernel/audit.c:235 [inline]
 audit_receive+0x72/0x2580 kernel/audit.c:1569
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x140/0x180 net/socket.c:733
 ____sys_sendmsg+0x326/0x4b0 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x19d/0x230 net/socket.c:2659
 __do_sys_sendmsg net/socket.c:2664 [inline]
 __se_sys_sendmsg net/socket.c:2662 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2662
 x64_sys_call+0x2734/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff88c161a0 of 8 bytes by task 9755 on cpu 1:
 audit_ctl_owner_current kernel/audit.c:256 [inline]
 audit_log_start+0x129/0x6b0 kernel/audit.c:1881
 audit_seccomp+0x4b/0x130 kernel/auditsc.c:3003
 seccomp_log kernel/seccomp.c:1025 [inline]
 __seccomp_filter+0x6fa/0x1180 kernel/seccomp.c:1317
 __secure_computing+0x9f/0x1c0 kernel/seccomp.c:1379
 syscall_trace_enter+0xd1/0x1f0 kernel/entry/common.c:52
 syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline]
 do_syscall_64+0xaa/0x1c0 arch/x86/entry/common.c:79
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0xffff888119295280

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 9755 Comm: syz.2.2200 Not tainted 6.14.0-rc6-syzkaller-00007-g0b46b049d6ec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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