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BUG: KCSAN: data-race in d_delete / step_into

read-write to 0xffff8881344b6f00 of 4 bytes by task 28545 on cpu 0:
 d_delete+0x6c/0xf0 fs/dcache.c:2388
 d_delete_notify+0x30/0xe0 include/linux/fsnotify.h:299
 vfs_unlink+0x305/0x3e0 fs/namei.c:4353
 do_unlinkat+0x236/0x4c0 fs/namei.c:4402
 __do_sys_unlink fs/namei.c:4450 [inline]
 __se_sys_unlink fs/namei.c:4448 [inline]
 __x64_sys_unlink+0x30/0x40 fs/namei.c:4448
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff8881344b6f00 of 4 bytes by task 2773 on cpu 1:
 __d_entry_type include/linux/dcache.h:392 [inline]
 d_is_symlink include/linux/dcache.h:422 [inline]
 step_into+0x12f/0x800 fs/namei.c:1848
 walk_component+0x164/0x230 fs/namei.c:2011
 lookup_last fs/namei.c:2462 [inline]
 path_lookupat+0x10a/0x2a0 fs/namei.c:2486
 filename_lookup+0x126/0x300 fs/namei.c:2515
 user_path_at_empty+0x42/0x120 fs/namei.c:2924
 do_readlinkat+0x92/0x210 fs/stat.c:499
 __do_sys_readlink fs/stat.c:532 [inline]
 __se_sys_readlink fs/stat.c:529 [inline]
 __x64_sys_readlink+0x47/0x50 fs/stat.c:529
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00600108 -> 0x00008008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2773 Comm: udevd Not tainted 6.8.0-rc6-syzkaller-00024-ge326df53af00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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