syzbot

==================================================================
BUG: KCSAN: data-race in __skb_wait_for_more_packets / unix_release_sock

write to 0xffff888137d3aa78 of 1 bytes by task 22258 on cpu 0:
 unix_release_sock+0x298/0x680 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+0x8e/0x110 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+0x160/0x190 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 0xffff888137d3aa78 of 1 bytes by task 22284 on cpu 1:
 __skb_wait_for_more_packets+0xe8/0x2f0 net/core/datagram.c:106
 __unix_dgram_recvmsg+0x21c/0x8c0 net/unix/af_unix.c:2316
 unix_dgram_recvmsg net/unix/af_unix.c:2401 [inline]
 unix_seqpacket_recvmsg+0x5a/0x70 net/unix/af_unix.c:2269
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 sock_read_iter+0x19d/0x1e0 net/socket.c:1035
 call_read_iter include/linux/fs.h:2155 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 vfs_read+0x66c/0x750 fs/read_write.c:481
 ksys_read+0xd9/0x190 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:627
 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: 1 PID: 22284 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================