KCSAN: data-race in fsnotify / fsnotify_put

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in fsnotify / fsnotify_put_mark fs				832	863d	1515d	0/28	auto-closed as invalid on 2022/06/30 10:12
upstream	KCSAN: data-race in fsnotify / fsnotify_put_mark (2) fs				13	48d	98d	0/28	auto-obsoleted due to no activity on 2024/09/22 02:13

loop0: detected capacity change from 0 to 512
==================================================================
BUG: KCSAN: data-race in fsnotify / fsnotify_put_mark

write to 0xffff888101441150 of 4 bytes by task 3257 on cpu 1:
 fsnotify_detach_connector_from_object fs/notify/mark.c:330 [inline]
 fsnotify_put_mark+0x2db/0x5d0 fs/notify/mark.c:393
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:819 [inline]
 __se_sys_inotify_rm_watch+0xf9/0x170 fs/notify/inotify/inotify_user.c:793
 __x64_sys_inotify_rm_watch+0x31/0x40 fs/notify/inotify/inotify_user.c:793
 x64_sys_call+0x1ae0/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:256
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888101441150 of 4 bytes by task 3892 on cpu 0:
 fsnotify+0x36c/0x11a0 fs/notify/fsnotify.c:564
 __fsnotify_parent+0x285/0x380 fs/notify/fsnotify.c:261
 fsnotify_parent include/linux/fsnotify.h:96 [inline]
 fsnotify_file include/linux/fsnotify.h:131 [inline]
 fsnotify_close include/linux/fsnotify.h:412 [inline]
 __fput+0x5a6/0x6d0 fs/file_table.c:417
 __fput_sync+0x43/0x60 fs/file_table.c:516
 __do_sys_close fs/open.c:1565 [inline]
 __se_sys_close+0xf9/0x1a0 fs/open.c:1550
 __x64_sys_close+0x1f/0x30 fs/open.c:1550
 x64_sys_call+0x25cb/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00002008 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3892 Comm: syz.0.172 Tainted: G        W          6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
==================================================================
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
ext4 filesystem being mounted at /47/bus supports timestamps until 2038-01-19 (0x7fffffff)