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BUG: KCSAN: data-race in dentry_unlink_inode / path_lookupat

write to 0xffff888106e843f0 of 8 bytes by task 26 on cpu 1:
 __d_clear_type_and_inode fs/dcache.c:420 [inline]
 dentry_unlink_inode+0x65/0x260 fs/dcache.c:464
 d_delete+0x164/0x180 fs/dcache.c:2700
 d_delete_notify+0x32/0x100 include/linux/fsnotify.h:379
 vfs_unlink+0x287/0x490 fs/namei.c:5664
 handle_remove drivers/base/devtmpfs.c:344 [inline]
 handle drivers/base/devtmpfs.c:386 [inline]
 devtmpfs_work_loop+0x490/0x860 drivers/base/devtmpfs.c:399
 devtmpfsd+0x48/0x50 drivers/base/devtmpfs.c:441
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888106e843f0 of 8 bytes by task 2755 on cpu 0:
 step_into fs/namei.c:2141 [inline]
 walk_component fs/namei.c:2288 [inline]
 lookup_last fs/namei.c:2789 [inline]
 path_lookupat+0x1eb/0x4c0 fs/namei.c:2813
 filename_lookup+0x18f/0x390 fs/namei.c:2842
 filename_setxattr+0x56/0x410 fs/xattr.c:685
 path_setxattrat+0x2c1/0x320 fs/xattr.c:734
 __do_sys_lsetxattr fs/xattr.c:775 [inline]
 __se_sys_lsetxattr fs/xattr.c:771 [inline]
 __x64_sys_lsetxattr+0x71/0x90 fs/xattr.c:771
 x64_sys_call+0x22c1/0x2550 arch/x86/include/generated/asm/syscalls_64.h:190
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff888101d3dbb0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 2755 Comm: udevd Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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