================================================================== BUG: KCSAN: data-race in unix_dgram_poll / unix_release_sock write to 0xffff888104643e30 of 4 bytes by task 23465 on cpu 0: unix_release_sock+0x2e9/0x6e0 net/unix/af_unix.c:550 unix_release+0x2f/0x50 net/unix/af_unix.c:859 __sock_release net/socket.c:599 [inline] sock_close+0x6c/0x150 net/socket.c:1258 __fput+0x25b/0x4e0 fs/file_table.c:280 ____fput+0x11/0x20 fs/file_table.c:313 task_work_run+0xae/0x130 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x156/0x190 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888104643e30 of 4 bytes by task 23485 on cpu 1: unix_dgram_poll+0x6e/0x3e0 net/unix/af_unix.c:2693 sock_poll+0x23e/0x260 net/socket.c:1246 vfs_poll include/linux/poll.h:90 [inline] io_poll_rewait fs/io_uring.c:4850 [inline] io_async_task_func+0x135/0x590 fs/io_uring.c:5064 __tctx_task_work fs/io_uring.c:1910 [inline] tctx_task_work+0x1d4/0x3d0 fs/io_uring.c:1924 task_work_run+0xae/0x130 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:212 [inline] handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0xf8/0x190 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23485 Comm: syz-executor.0 Tainted: G W 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================