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BUG: KCSAN: data-race in unix_poll / unix_shutdown

read-write to 0xffff8881543270ec of 1 bytes by task 19350 on cpu 0:
 unix_shutdown+0x1ed/0x380 net/unix/af_unix.c:3024
 __sys_shutdown_sock net/socket.c:2318 [inline]
 __sys_shutdown net/socket.c:2330 [inline]
 __do_sys_shutdown net/socket.c:2338 [inline]
 __se_sys_shutdown+0xf6/0x140 net/socket.c:2336
 __x64_sys_shutdown+0x2d/0x40 net/socket.c:2336
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff8881543270ec of 1 bytes by task 19349 on cpu 1:
 unix_poll+0x98/0x250 net/unix/af_unix.c:3163
 sock_poll+0x23e/0x260 net/socket.c:1353
 vfs_poll include/linux/poll.h:88 [inline]
 __io_arm_poll_handler+0x209/0x900 io_uring/poll.c:577
 io_arm_poll_handler+0x43f/0x570 io_uring/poll.c:702
 io_queue_async+0x81/0x490 io_uring/io_uring.c:2001
 io_queue_sqe io_uring/io_uring.c:2032 [inline]
 io_submit_sqe+0x6fe/0xa50 io_uring/io_uring.c:2281
 io_submit_sqes+0x274/0x550 io_uring/io_uring.c:2392
 __do_sys_io_uring_enter io_uring/io_uring.c:3340 [inline]
 __se_sys_io_uring_enter+0x1ef/0xc40 io_uring/io_uring.c:3272
 __x64_sys_io_uring_enter+0x74/0x80 io_uring/io_uring.c:3272
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19349 Comm: syz-executor.3 Tainted: G        W          6.2.0-rc2-syzkaller-00010-g69b41ac87e4a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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