================================================================== BUG: KCSAN: data-race in __d_lookup_done / __dentry_kill read to 0xffff8881252243c0 of 4 bytes by task 7548 on cpu 0: dentry_unlist fs/dcache.c:544 [inline] __dentry_kill+0x1be/0x3c0 fs/dcache.c:575 dentry_kill fs/dcache.c:698 [inline] dput+0x3b5/0x750 fs/dcache.c:859 path_put fs/namei.c:482 [inline] terminate_walk+0x107/0x250 fs/namei.c:596 path_lookupat.isra.0+0x27e/0x5a0 fs/namei.c:2322 filename_lookup+0x145/0x2b0 fs/namei.c:2338 user_path_at_empty+0x4c/0x70 fs/namei.c:2598 do_readlinkat+0x84/0x220 fs/stat.c:399 __do_sys_readlink fs/stat.c:432 [inline] __se_sys_readlink fs/stat.c:429 [inline] __x64_sys_readlink+0x51/0x70 fs/stat.c:429 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8881252243c0 of 4 bytes by task 7549 on cpu 1: __d_lookup_done+0xb0/0x2f0 fs/dcache.c:2627 d_lookup_done include/linux/dcache.h:367 [inline] d_lookup_done include/linux/dcache.h:363 [inline] __lookup_slow+0x254/0x2a0 fs/namei.c:1664 lookup_slow+0x4f/0x70 fs/namei.c:1680 walk_component+0x4a2/0xe70 fs/namei.c:1800 link_path_walk.part.0+0x5d3/0xa90 fs/namei.c:2131 link_path_walk fs/namei.c:2259 [inline] path_lookupat.isra.0+0x77/0x5a0 fs/namei.c:2307 filename_lookup+0x145/0x2b0 fs/namei.c:2338 user_path_at_empty+0x4c/0x70 fs/namei.c:2598 user_path_at include/linux/namei.h:49 [inline] vfs_statx+0xd9/0x190 fs/stat.c:187 vfs_lstat include/linux/fs.h:3247 [inline] __do_sys_newlstat+0x51/0xb0 fs/stat.c:354 __se_sys_newlstat fs/stat.c:348 [inline] __x64_sys_newlstat+0x3a/0x50 fs/stat.c:348 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 7549 Comm: udevd Not tainted 5.4.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================