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BUG: KCSAN: data-race in dentry_unlink_inode / step_into

write to 0xffff888100603030 of 8 bytes by task 5115 on cpu 0:
 __d_clear_type_and_inode fs/dcache.c:419 [inline]
 dentry_unlink_inode+0x65/0x260 fs/dcache.c:456
 __dentry_kill+0x18d/0x4b0 fs/dcache.c:669
 dput+0x5e/0xd0 fs/dcache.c:911
 do_renameat2+0x5d5/0x9e0 fs/namei.c:5366
 __do_sys_rename fs/namei.c:5411 [inline]
 __se_sys_rename fs/namei.c:5409 [inline]
 __x64_sys_rename+0x58/0x70 fs/namei.c:5409
 x64_sys_call+0x1f9/0x3000 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888100603030 of 8 bytes by task 6162 on cpu 1:
 step_into+0x122/0x7f0 fs/namei.c:1993
 walk_component+0x162/0x220 fs/namei.c:2157
 lookup_last fs/namei.c:2652 [inline]
 path_lookupat+0xfe/0x2a0 fs/namei.c:2676
 filename_lookup+0x147/0x340 fs/namei.c:2705
 user_path_at+0x3e/0x130 fs/namei.c:3215
 do_utimes_path fs/utimes.c:95 [inline]
 do_utimes+0xd9/0x210 fs/utimes.c:140
 __do_sys_utimensat fs/utimes.c:159 [inline]
 __se_sys_utimensat fs/utimes.c:143 [inline]
 __x64_sys_utimensat+0xc4/0x170 fs/utimes.c:143
 x64_sys_call+0x2fc9/0x3000 arch/x86/include/generated/asm/syscalls_64.h:281
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff888119d8a930 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6162 Comm: udevd Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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