syzbot

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BUG: KCSAN: data-race in __fsnotify_parent / fsnotify_detach_connector_from_object

write to 0xffff888101eb9324 of 4 bytes by task 1815 on cpu 0:
 fsnotify_detach_connector_from_object+0x80/0x260 fs/notify/mark.c:253
 fsnotify_put_mark+0x198/0x3b0 fs/notify/mark.c:316
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:820 [inline]
 __se_sys_inotify_rm_watch+0xff/0x170 fs/notify/inotify/inotify_user.c:794
 __x64_sys_inotify_rm_watch+0x2d/0x40 fs/notify/inotify/inotify_user.c:794
 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 0xffff888101eb9324 of 4 bytes by task 2085 on cpu 1:
 fsnotify_event_needs_parent fs/notify/fsnotify.c:161 [inline]
 __fsnotify_parent+0x126/0x470 fs/notify/fsnotify.c:202
 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:1318
 do_sys_open fs/open.c:1329 [inline]
 __do_sys_openat fs/open.c:1345 [inline]
 __se_sys_openat fs/open.c:1340 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1340
 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: 0x00002008 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2085 Comm: syz-executor.3 Not tainted 6.0.0-rc7-syzkaller-00042-g46452d3786a8-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
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loop3: detected capacity change from 0 to 87
FAT-fs (loop3): bogus sectors per cluster 116
FAT-fs (loop3): Can't find a valid FAT filesystem