KCSAN: data-race in sk_psock_drop / unix_stream

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
ece1b702	assessment-kcsan	Benign: ✅ Confident: ✅	❓	KCSAN: data-race in sk_psock_drop / unix_stream_sendmsg	2026/02/23 15:12	2026/02/23 15:12	2026/02/23 15:16	305c0ec5

Title	Replies (including bot)	Last reply
[PATCH net] net: annotate data-races around sk->sk_{data_ready,write_space}	3 (3)	2026/02/27 03:40
[syzbot] [net?] [bpf?] KCSAN: data-race in sk_psock_drop / unix_stream_sendmsg	0 (1)	2026/02/25 12:24

Title

Replies (including bot)

Last reply

[PATCH net] net: annotate data-races around sk->sk_{data_ready,write_space}

3 (3)

2026/02/27 03:40

[syzbot] [net?] [bpf?] KCSAN: data-race in sk_psock_drop / unix_stream_sendmsg

0 (1)

2026/02/25 12:24

================================================================== BUG: KCSAN: data-race in sk_psock_drop / unix_stream_sendmsg write to 0xffff88810220dc08 of 8 bytes by task 3611 on cpu 1: sk_psock_stop_verdict net/core/skmsg.c:1311 [inline] sk_psock_drop+0x12f/0x270 net/core/skmsg.c:896 sk_psock_put include/linux/skmsg.h:506 [inline] sock_map_unref+0x2a5/0x300 net/core/sock_map.c:185 __sock_map_delete net/core/sock_map.c:426 [inline] sock_map_delete_from_link net/core/sock_map.c:439 [inline] sock_map_unlink net/core/sock_map.c:1608 [inline] sock_map_remove_links+0x228/0x340 net/core/sock_map.c:1623 sock_map_close+0xa1/0x340 net/core/sock_map.c:1684 unix_release+0x4e/0x80 net/unix/af_unix.c:1183 __sock_release net/socket.c:662 [inline] sock_close+0x6b/0x150 net/socket.c:1455 __fput+0x29b/0x650 fs/file_table.c:469 fput_close_sync+0xad/0x190 fs/file_table.c:574 __do_sys_close fs/open.c:1509 [inline] __se_sys_close fs/open.c:1494 [inline] __x64_sys_close+0x55/0xf0 fs/open.c:1494 x64_sys_call+0x275d/0x3020 arch/x86/include/generated/asm/syscalls_64.h:4 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88810220dc08 of 8 bytes by task 3605 on cpu 0: unix_stream_sendmsg+0x7f8/0xbb0 net/unix/af_unix.c:2480 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x5af/0x600 net/socket.c:2592 ___sys_sendmsg+0x195/0x1e0 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+0x194c/0x3020 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0xffffffff8486dd00 -> 0xffffffff8472c9f0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3605 Comm: syz.4.30 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/02/19 03:14	upstream	23b0f90ba871	77d4d919	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in sk_psock_drop / unix_stream_sendmsg

Crashes (1):

Assets (help?)