KCSAN: data-race in d_lru_add / lookup

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in d_lru_add / lookup_fast (3) fs	6	1	1300d	1300d	0/29	auto-closed as invalid on 2022/07/14 18:04
upstream	KCSAN: data-race in d_lru_add / lookup_fast (4) fs	6	1	1090d	1090d	0/29	auto-obsoleted due to no activity on 2023/03/16 16:50
upstream	KCSAN: data-race in d_lru_add / lookup_fast (2) fs	6	2	2185d	2233d	0/29	auto-closed as invalid on 2020/03/16 05:36

================================================================== BUG: KCSAN: data-race in d_lru_add / lookup_fast read to 0xffff888124414d80 of 4 bytes by task 24069 on cpu 1: d_is_miss include/linux/dcache.h:394 [inline] d_is_negative include/linux/dcache.h:440 [inline] lookup_fast+0xdf/0x700 fs/namei.c:1575 do_last fs/namei.c:3274 [inline] path_openat+0x2ac/0x36e0 fs/namei.c:3525 do_filp_open+0x11e/0x1b0 fs/namei.c:3555 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x55/0x70 fs/open.c:1110 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888124414d80 of 4 bytes by task 24068 on cpu 0: d_lru_add+0x56/0xf0 fs/dcache.c:400 retain_dentry fs/dcache.c:653 [inline] dput+0x417/0x750 fs/dcache.c:854 path_put fs/namei.c:482 [inline] put_link fs/namei.c:877 [inline] step_into fs/namei.c:1762 [inline] do_last fs/namei.c:3373 [inline] path_openat+0x1ec9/0x36e0 fs/namei.c:3525 do_filp_open+0x11e/0x1b0 fs/namei.c:3555 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x55/0x70 fs/open.c:1110 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: 0 PID: 24068 Comm: blkid Not tainted 5.4.0-rc6+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================