================================================================== BUG: KCSAN: data-race in sock_alloc_send_pskb / unix_release_sock write to 0xffff88813843aa78 of 1 bytes by task 30801 on cpu 1: unix_release_sock+0x298/0x680 net/unix/af_unix.c:565 unix_release+0x4e/0x70 net/unix/af_unix.c:949 __sock_release net/socket.c:649 [inline] sock_close+0x6c/0x150 net/socket.c:1314 __fput+0x295/0x520 fs/file_table.c:280 ____fput+0x11/0x20 fs/file_table.c:313 task_work_run+0x8e/0x110 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300 do_syscall_64+0x50/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88813843aa78 of 1 bytes by task 31844 on cpu 0: sock_wait_for_wmem net/core/sock.c:2530 [inline] sock_alloc_send_pskb+0x351/0x4e0 net/core/sock.c:2573 unix_dgram_sendmsg+0x4c7/0x16b0 net/unix/af_unix.c:1811 unix_seqpacket_sendmsg+0xcc/0x110 net/unix/af_unix.c:2258 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x39a/0x510 net/socket.c:2409 __sys_sendmsg_sock+0x25/0x30 net/socket.c:2475 io_sendmsg fs/io_uring.c:4797 [inline] io_issue_sqe+0x3442/0x5680 fs/io_uring.c:6648 io_wq_submit_work+0x1c5/0x370 fs/io_uring.c:6793 io_worker_handle_work+0x4cf/0xb10 fs/io-wq.c:553 io_wqe_worker+0x1bc/0x4f0 fs/io-wq.c:606 ret_from_fork+0x1f/0x30 value changed: 0x00 -> 0x03 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 31844 Comm: iou-wrk-31842 Tainted: G W 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================