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BUG: KCSAN: data-race in sock_alloc_send_pskb / unix_shutdown

read-write to 0xffff88810320a86c of 1 bytes by task 18888 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 0xffff88810320a86c of 1 bytes by task 17396 on cpu 0:
 sock_alloc_send_pskb+0x117/0x4e0
 unix_stream_sendmsg+0x35d/0xa80
 sock_sendmsg+0x79/0xb0
 io_send+0x2a4/0x920
 io_issue_sqe+0x142/0x660
 io_submit_sqes+0x694/0x1030
 __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: 17396 Comm: syz-executor.1 Not tainted 6.2.0-rc7-syzkaller-00002-gd2d11f342b17-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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