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BUG: KCSAN: data-race in unix_poll / unix_shutdown

read-write to 0xffff8881096f082c of 1 bytes by task 20286 on cpu 1:
 unix_shutdown+0x72/0x360
 __se_sys_shutdown+0xf8/0x140
 __x64_sys_shutdown+0x31/0x40
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff8881096f082c of 1 bytes by task 20285 on cpu 0:
 unix_poll+0x9c/0x250
 sock_poll+0x253/0x270
 __io_arm_poll_handler+0x205/0xe30
 io_arm_poll_handler+0x472/0x5d0
 io_queue_async+0x85/0x4a0
 io_submit_sqes+0xa44/0x1030
 __se_sys_io_uring_enter+0x1e7/0x1680
 __x64_sys_io_uring_enter+0x78/0x90
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 20285 Comm: syz-executor.0 Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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