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BUG: KCSAN: data-race in sock_alloc_send_pskb / unix_release_sock

write to 0xffff888106695e78 of 1 bytes by task 24547 on cpu 1:
 unix_release_sock+0x2d0/0x700 net/unix/af_unix.c:565
 unix_release+0x4e/0x70 net/unix/af_unix.c:949
 __sock_release net/socket.c:649 [inline]
 sock_close+0x6c/0x150 net/socket.c:1314
 __fput+0x295/0x520 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:175 [inline]
 exit_to_user_mode_prepare+0x156/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888106695e78 of 1 bytes by task 24549 on cpu 0:
 sock_alloc_send_pskb+0x113/0x4e0 net/core/sock.c:2478
 sock_alloc_send_skb+0x2d/0x40 net/core/sock.c:2510
 queue_oob net/unix/af_unix.c:1971 [inline]
 unix_stream_sendmsg+0xa0c/0xfb0 net/unix/af_unix.c:2103
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 __sys_sendto+0x302/0x3e0 net/socket.c:2036
 __do_sys_sendto net/socket.c:2048 [inline]
 __se_sys_sendto net/socket.c:2044 [inline]
 __x64_sys_sendto+0x74/0x90 net/socket.c:2044
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00 -> 0x03

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24549 Comm: syz-executor.1 Not tainted 5.15.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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