================================================================== BUG: KCSAN: data-race in unix_release_sock / unix_seqpacket_sendmsg write to 0xffff88810cd2e630 of 4 bytes by task 18098 on cpu 0: unix_release_sock+0x2ad/0x650 net/unix/af_unix.c:550 unix_release+0x2f/0x50 net/unix/af_unix.c:859 __sock_release net/socket.c:596 [inline] sock_close+0x6c/0x150 net/socket.c:1277 __fput+0x243/0x4d0 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x13c/0x170 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:266 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88810cd2e630 of 4 bytes by task 18101 on cpu 1: sock_error include/net/sock.h:2217 [inline] unix_seqpacket_sendmsg+0x36/0x100 net/unix/af_unix.c:2044 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0x352/0x4c0 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmmsg+0x335/0x4b0 net/socket.c:2497 __do_sys_sendmmsg net/socket.c:2526 [inline] __se_sys_sendmmsg net/socket.c:2523 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2523 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 18101 Comm: syz-executor.4 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================