syzbot

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BUG: KCSAN: data-race in fsnotify / fsnotify_put_mark

write to 0xffff8881027f9c2c of 4 bytes by task 2452 on cpu 1:
 fsnotify_detach_connector_from_object fs/notify/mark.c:215 [inline]
 fsnotify_put_mark+0x2b9/0x6d0 fs/notify/mark.c:274
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:807 [inline]
 __se_sys_inotify_rm_watch+0xff/0x170 fs/notify/inotify/inotify_user.c:781
 __x64_sys_inotify_rm_watch+0x2d/0x40 fs/notify/inotify/inotify_user.c:781
 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+0x46/0xb0

read to 0xffff8881027f9c2c of 4 bytes by task 1859 on cpu 0:
 fsnotify+0x2b9/0x1680 fs/notify/fsnotify.c:526
 __fsnotify_parent+0x30b/0x470 fs/notify/fsnotify.c:230
 fsnotify_parent include/linux/fsnotify.h:77 [inline]
 fsnotify_file include/linux/fsnotify.h:99 [inline]
 fsnotify_open include/linux/fsnotify.h:330 [inline]
 do_sys_openat2+0x23a/0x2a0 fs/open.c:1218
 do_sys_open fs/open.c:1229 [inline]
 __do_sys_openat fs/open.c:1245 [inline]
 __se_sys_openat fs/open.c:1240 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1240
 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+0x46/0xb0

value changed: 0x00002008 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1859 Comm: syz-executor.3 Not tainted 5.18.0-syzkaller-07496-gd7227785e384-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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