KCSAN: data-race in dentry_unlink_inode / path

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
795ce30a-ae97-4b01-983a-b39d9c597490	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	KCSAN: data-race in dentry_unlink_inode / path_openat (3)	2026/05/18 05:11	2026/05/18 05:11	2026/05/18 05:41	de5aae85e5f28e2fa1c7deefcc24fe286abe5140
98cf4d46-aa06-433f-8c59-cec3df49d636	assessment-kcsan	Benign: ✅ Confident: ✅	❓	KCSAN: data-race in dentry_unlink_inode / path_openat (3)	2026/05/08 01:59	2026/05/08 01:59	2026/05/08 02:20	06a6ee865c1ddbbe04beddc5a2bf68cc0e8aa03c

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in dentry_unlink_inode / path_openat (2) fs	6				2	101d	105d	0/29	auto-obsoleted due to no activity on 2026/04/19 00:21
upstream	KCSAN: data-race in dentry_unlink_inode / path_openat fs	6				1	166d	166d	0/29	auto-obsoleted due to no activity on 2026/02/13 00:48

Kernel

Title

Rank 🛈

upstream

KCSAN: data-race in dentry_unlink_inode / path_openat (2) fs

101d

105d

0/29

auto-obsoleted due to no activity on 2026/04/19 00:21

upstream

KCSAN: data-race in dentry_unlink_inode / path_openat fs

166d

0/29

auto-obsoleted due to no activity on 2026/02/13 00:48

================================================================== BUG: KCSAN: data-race in dentry_unlink_inode / path_openat write to 0xffff8881005e1e70 of 8 bytes by task 6072 on cpu 0: __d_clear_type_and_inode fs/dcache.c:420 [inline] dentry_unlink_inode+0x6a/0x290 fs/dcache.c:457 __dentry_kill+0x145/0x4d0 fs/dcache.c:718 finish_dput+0x2b/0x200 fs/dcache.c:927 dput+0x52/0x60 fs/dcache.c:976 end_renaming fs/namei.c:4124 [inline] filename_renameat2+0x493/0x6e0 fs/namei.c:6174 __do_sys_rename fs/namei.c:6216 [inline] __se_sys_rename+0x4a/0x1c0 fs/namei.c:6212 __x64_sys_rename+0x31/0x40 fs/namei.c:6212 x64_sys_call+0x2b3/0x3020 arch/x86/include/generated/asm/syscalls_64.h:83 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881005e1e70 of 8 bytes by task 6039 on cpu 1: step_into fs/namei.c:2137 [inline] open_last_lookups fs/namei.c:4646 [inline] path_openat+0x65f/0x2050 fs/namei.c:4855 do_file_open+0x16c/0x290 fs/namei.c:4887 do_sys_openat2+0x94/0x130 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __x64_sys_openat+0xf2/0x120 fs/open.c:1381 x64_sys_call+0x1e39/0x3020 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0xffff88811b9e20b8 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 6039 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/05/08 01:58	upstream	fcee7d82f27d	5633175a	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in dentry_unlink_inode / path_openat

Crashes (1):

Assets (help?)