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BUG: KCSAN: data-race in __dentry_kill / d_set_d_op

write to 0xffff88813829e840 of 4 bytes by task 3166 on cpu 1:
 d_set_d_op+0x17f/0x220 fs/dcache.c:1936
 simple_lookup+0x78/0x90 fs/libfs.c:74
 __lookup_slow+0x182/0x250 fs/namei.c:1707
 lookup_slow fs/namei.c:1724 [inline]
 walk_component+0x2b6/0x360 fs/namei.c:2020
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x12d/0x3d0 fs/namei.c:2499
 filename_lookup+0x130/0x310 fs/namei.c:2528
 vfs_statx+0xa3/0x3c0 fs/stat.c:228
 vfs_fstatat fs/stat.c:255 [inline]
 __do_sys_newfstatat fs/stat.c:426 [inline]
 __se_sys_newfstatat+0x8a/0x290 fs/stat.c:420
 __x64_sys_newfstatat+0x51/0x60 fs/stat.c:420
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88813829e840 of 4 bytes by task 4665 on cpu 0:
 dentry_unlist fs/dcache.c:572 [inline]
 __dentry_kill+0x1ef/0x450 fs/dcache.c:603
 dput+0x218/0x430 fs/dcache.c:913
 handle_mounts fs/namei.c:1552 [inline]
 step_into+0x468/0xf70 fs/namei.c:1850
 walk_component+0x1a1/0x360 fs/namei.c:2026
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x12d/0x3d0 fs/namei.c:2499
 filename_lookup+0x130/0x310 fs/namei.c:2528
 user_path_at_empty+0x3e/0x110 fs/namei.c:2851
 user_path_at include/linux/namei.h:57 [inline]
 inotify_find_inode fs/notify/inotify/inotify_user.c:363 [inline]
 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:764 [inline]
 __se_sys_inotify_add_watch+0x131/0x680 fs/notify/inotify/inotify_user.c:717
 __x64_sys_inotify_add_watch+0x3f/0x50 fs/notify/inotify/inotify_user.c:717
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x10000000 -> 0x00000008

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 4665 Comm: udevd Not tainted 5.17.0-syzkaller-14079-gbe2d3ecedd99-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
udevd[4665]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory
udevd[4665]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory
udevd[4665]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory
udevd[4665]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory
udevd[4665]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory
udevd[4665]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory