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BUG: KCSAN: data-race in __dentry_kill / lookup_fast

read-write to 0xffff88810a9f50c0 of 4 bytes by task 13920 on cpu 0:
 dentry_unlist fs/dcache.c:547 [inline]
 __dentry_kill+0x18f/0x4a0 fs/dcache.c:603
 dentry_kill+0x8d/0x1e0
 dput+0x118/0x1f0 fs/dcache.c:913
 do_unlinkat+0x281/0x4e0 fs/namei.c:4323
 __do_sys_unlink fs/namei.c:4368 [inline]
 __se_sys_unlink fs/namei.c:4366 [inline]
 __x64_sys_unlink+0x30/0x40 fs/namei.c:4366
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88810a9f50c0 of 4 bytes by task 2737 on cpu 1:
 d_revalidate fs/namei.c:855 [inline]
 lookup_fast+0xd9/0x290 fs/namei.c:1634
 walk_component+0x3f/0x230 fs/namei.c:1989
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x10a/0x2a0 fs/namei.c:2474
 filename_lookup+0x126/0x300 fs/namei.c:2503
 user_path_at_empty+0x42/0x110 fs/namei.c:2876
 do_readlinkat+0x92/0x210 fs/stat.c:471
 __do_sys_readlink fs/stat.c:504 [inline]
 __se_sys_readlink fs/stat.c:501 [inline]
 __x64_sys_readlink+0x47/0x50 fs/stat.c:501
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00600008 -> 0x00008008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2737 Comm: udevd Tainted: G        W          6.2.0-rc8-syzkaller-00021-ge1c04510f521-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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