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BUG: KCSAN: data-race in __dentry_kill / lookup_fast

write to 0xffff88812981bb40 of 4 bytes by task 32130 on cpu 0:
 d_lru_del fs/dcache.c:437 [inline]
 __dentry_kill+0xb4/0x450 fs/dcache.c:599
 dentry_kill+0x8d/0x1e0
 dput+0x11e/0x1f0 fs/dcache.c:913
 lookup_open fs/namei.c:3311 [inline]
 open_last_lookups fs/namei.c:3444 [inline]
 path_openat+0x6ff/0x1b30 fs/namei.c:3650
 do_filp_open+0x105/0x220 fs/namei.c:3680
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1278
 do_sys_open fs/open.c:1294 [inline]
 __do_sys_open fs/open.c:1302 [inline]
 __se_sys_open fs/open.c:1298 [inline]
 __x64_sys_open+0xe2/0x110 fs/open.c:1298
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88812981bb40 of 4 bytes by task 32129 on cpu 1:
 d_revalidate fs/namei.c:847 [inline]
 lookup_fast+0x172/0x360 fs/namei.c:1650
 walk_component+0x6b/0x280 fs/namei.c:2010
 lookup_last fs/namei.c:2469 [inline]
 path_lookupat+0x11d/0x2b0 fs/namei.c:2493
 filename_lookup+0x130/0x310 fs/namei.c:2522
 user_path_at_empty+0x3e/0x110 fs/namei.c:2895
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_chdir fs/open.c:514 [inline]
 __se_sys_chdir+0x56/0x150 fs/open.c:508
 __x64_sys_chdir+0x1b/0x20 fs/open.c:508
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00080047 -> 0x00008047

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 32129 Comm: syz-executor.2 Not tainted 5.19.0-rc7-syzkaller-00002-g80e19f34c288-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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