==================================================================
BUG: KCSAN: data-race in fsnotify_detach_mark / fsnotify_handle_inode_event

write to 0xffff888104d92e04 of 4 bytes by task 9995 on cpu 0:
 fsnotify_detach_mark+0xb9/0x160 fs/notify/mark.c:624
 fsnotify_destroy_mark+0x6a/0x140 fs/notify/mark.c:666
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:806 [inline]
 __se_sys_inotify_rm_watch+0xe8/0x170 fs/notify/inotify/inotify_user.c:787
 __x64_sys_inotify_rm_watch+0x31/0x40 fs/notify/inotify/inotify_user.c:787
 x64_sys_call+0x1f51/0x2550 arch/x86/include/generated/asm/syscalls_64.h:256
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888104d92e04 of 4 bytes by task 22274 on cpu 1:
 fsnotify_handle_inode_event+0x13d/0x230 fs/notify/fsnotify.c:267
 fsnotify_handle_event fs/notify/fsnotify.c:330 [inline]
 send_to_group fs/notify/fsnotify.c:378 [inline]
 fsnotify+0x16ae/0x1860 fs/notify/fsnotify.c:597
 __fsnotify_parent+0x2f8/0x3a0 fs/notify/fsnotify.c:241
 fsnotify_parent include/linux/fsnotify.h:96 [inline]
 fsnotify_path include/linux/fsnotify.h:113 [inline]
 fsnotify_file include/linux/fsnotify.h:127 [inline]
 fsnotify_close include/linux/fsnotify.h:461 [inline]
 __fput+0x1e2/0x630 fs/file_table.c:498
 fput_close_sync+0xad/0x190 fs/file_table.c:617
 __do_sys_close fs/open.c:1560 [inline]
 __se_sys_close fs/open.c:1545 [inline]
 __x64_sys_close+0x55/0xf0 fs/open.c:1545
 x64_sys_call+0x812/0x2550 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000003 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 22274 Comm: syz.9.4060 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
==================================================================
EXT4-fs (loop9): 1 truncate cleaned up