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BUG: KCSAN: data-race in dont_mount / lookup_fast

read-write to 0xffff88813315d000 of 4 bytes by task 3290 on cpu 1:
 dont_mount+0x27/0x40 include/linux/dcache.h:363
 vfs_rename+0x8ee/0x9c0 fs/namei.c:4893
 do_renameat2+0x732/0xa60 fs/namei.c:5040
 __do_sys_rename fs/namei.c:5087 [inline]
 __se_sys_rename fs/namei.c:5085 [inline]
 __x64_sys_rename+0x5c/0x70 fs/namei.c:5085
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff88813315d000 of 4 bytes by task 3286 on cpu 0:
 d_revalidate fs/namei.c:860 [inline]
 lookup_fast+0xd9/0x2a0 fs/namei.c:1641
 walk_component+0x3f/0x230 fs/namei.c:2000
 lookup_last fs/namei.c:2461 [inline]
 path_lookupat+0x10a/0x2b0 fs/namei.c:2485
 filename_lookup+0x127/0x300 fs/namei.c:2514
 user_path_at_empty+0x42/0x120 fs/namei.c:2921
 user_path_at include/linux/namei.h:57 [inline]
 do_utimes_path fs/utimes.c:95 [inline]
 do_utimes+0xca/0x200 fs/utimes.c:145
 __do_sys_utimensat fs/utimes.c:164 [inline]
 __se_sys_utimensat fs/utimes.c:148 [inline]
 __x64_sys_utimensat+0xc6/0x170 fs/utimes.c:148
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x00600008 -> 0x00008108

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3286 Comm: udevd Not tainted 6.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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