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BUG: KCSAN: data-race in sock_alloc_send_pskb / unix_shutdown

read-write to 0xffff888141c3a3ac of 1 bytes by task 7808 on cpu 0:
 unix_shutdown+0x6d/0x380 net/unix/af_unix.c:3004
 __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 0xffff888141c3a3ac of 1 bytes by task 7806 on cpu 1:
 sock_alloc_send_pskb+0x113/0x4f0 net/core/sock.c:2726
 unix_stream_sendmsg+0x3a5/0xaa0 net/unix/af_unix.c:2206
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0x75/0xa0 net/socket.c:734
 io_send+0x27d/0x9d0 io_uring/net.c:392
 io_issue_sqe+0x33f/0x890 io_uring/io_uring.c:1847
 io_queue_sqe io_uring/io_uring.c:2019 [inline]
 io_submit_sqe+0x3b1/0xa50 io_uring/io_uring.c:2277
 io_submit_sqes+0x274/0x550 io_uring/io_uring.c:2388
 __do_sys_io_uring_enter io_uring/io_uring.c:3333 [inline]
 __se_sys_io_uring_enter+0x1ef/0xc40 io_uring/io_uring.c:3265
 __x64_sys_io_uring_enter+0x74/0x80 io_uring/io_uring.c:3265
 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: 7806 Comm: syz-executor.0 Not tainted 6.2.0-rc1-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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