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BUG: KCSAN: data-race in audit_log_start / audit_receive

write to 0xffffffff88e6a480 of 8 bytes by task 15913 on cpu 1:
 audit_ctl_lock kernel/audit.c:245 [inline]
 audit_receive+0x78/0x2180 kernel/audit.c:1605
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x5c0/0x690 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:729
 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2617
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2671
 __sys_sendmsg net/socket.c:2703 [inline]
 __do_sys_sendmsg net/socket.c:2708 [inline]
 __se_sys_sendmsg net/socket.c:2706 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2706
 x64_sys_call+0x191e/0x3000 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff88e6a480 of 8 bytes by task 11930 on cpu 0:
 audit_ctl_owner_current kernel/audit.c:266 [inline]
 audit_log_start+0x106/0x720 kernel/audit.c:1923
 common_lsm_audit+0x66/0x230 security/lsm_audit.c:442
 slow_avc_audit+0x104/0x140 security/selinux/avc.c:778
 avc_audit security/selinux/include/avc.h:131 [inline]
 avc_has_perm+0x13a/0x180 security/selinux/avc.c:1197
 superblock_has_perm security/selinux/hooks.c:1968 [inline]
 selinux_umount+0xb9/0xd0 security/selinux/hooks.c:2797
 security_sb_umount+0x3e/0x80 security/security.c:1623
 do_umount fs/namespace.c:1861 [inline]
 path_umount+0x221/0x7e0 fs/namespace.c:2035
 ksys_umount fs/namespace.c:2058 [inline]
 __do_sys_umount fs/namespace.c:2063 [inline]
 __se_sys_umount fs/namespace.c:2061 [inline]
 __x64_sys_umount+0xb6/0xe0 fs/namespace.c:2061
 x64_sys_call+0xdd2/0x3000 arch/x86/include/generated/asm/syscalls_64.h:167
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0xffff8881099ec200

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 11930 Comm: syz-executor Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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