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BUG: KCSAN: data-race in unix_dgram_poll / unix_release_sock

write to 0xffff888105d8de30 of 4 bytes by task 5627 on cpu 1:
 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 0xffff888105d8de30 of 4 bytes by task 5607 on cpu 0:
 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_arm_poll_handler+0x195/0x460 fs/io_uring.c:5116
 io_arm_poll_handler+0x2a3/0x440 fs/io_uring.c:5185
 __io_queue_sqe+0x26c/0x360 fs/io_uring.c:6432
 io_queue_sqe fs/io_uring.c:6462 [inline]
 io_submit_sqe+0x18b8/0x33a0 fs/io_uring.c:6625
 io_submit_sqes+0x5bd/0xbd0 fs/io_uring.c:6733
 __do_sys_io_uring_enter fs/io_uring.c:9318 [inline]
 __se_sys_io_uring_enter+0x1e1/0xa80 fs/io_uring.c:9260
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9260
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5607 Comm: syz-executor.0 Not tainted 5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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