KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
3ab94885-c15b-4510-bb19-cb6d0081c1a4	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (9)	2026/05/24 16:33	2026/05/24 16:33	2026/05/24 17:00	c69befb30ac10e158cc9d1557b508ee3f0eca1de
9c2fab05-ae3f-4464-a5ae-303eb1c403ac	assessment-kcsan	Benign: ✅ Confident: ✅	❓	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (9)	2026/03/31 12:12	2026/03/31 12:25	2026/03/31 12:26	d0af506ef4609d1bffbbbbae776b857a63d84b20
34253091-9671-48a0-9397-e885b73c80ea	assessment-kcsan	Benign: ✅ Confident: ✅	❓	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (9)	2026/03/31 12:12	2026/03/31 12:14	2026/03/31 12:17	d0af506ef4609d1bffbbbbae776b857a63d84b20
0d8f4d24-a8bb-45ea-9eb0-dbb1648db2bc	assessment-kcsan	Benign: ✅ Confident: ✅	❓	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (9)	2026/03/26 00:03	2026/03/26 00:03	2026/03/26 00:27	c6143aacd8e1a01f2482ab5eec709f9949710cee
41bb13bd-1c74-4bda-aadc-ac6f182c9b3b	assessment-kcsan		💥	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (9)	2026/03/24 09:40	2026/03/24 09:40	2026/03/24 09:40	971831e4896625f799f350fe4439dc0774b7154a+	unexpected git log output: "warning: unable to access '/root/.config/git/attributes': Permission denied\nwarning: unable to access '/root/.config/git/attributes': Permission denied\nc369299895a591d967... truncated to first 200 bytes; open job for full error

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (6) fs	6	2	799d	833d	0/29	auto-obsoleted due to no activity on 2024/06/17 10:51
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (8) fs	6	1	537d	537d	0/29	auto-obsoleted due to no activity on 2025/03/27 02:07
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event fs	6	1	1448d	1448d	0/29	auto-closed as invalid on 2022/09/07 06:46
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (4) fs	6	1	1094d	1094d	0/29	auto-obsoleted due to no activity on 2023/08/27 10:05
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (7) fs	6	1	740d	740d	0/29	auto-obsoleted due to no activity on 2024/08/15 15:27
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (2) fs	6	1	1353d	1353d	0/29	auto-obsoleted due to no activity on 2022/12/10 20:40
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (3) fs	6	1	1201d	1201d	0/29	auto-obsoleted due to no activity on 2023/05/12 13:04
upstream	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (5) fs	6	3	995d	1005d	0/29	auto-obsoleted due to no activity on 2023/12/04 18:59

Kernel

Title

Rank 🛈

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (6) fs

799d

833d

0/29

auto-obsoleted due to no activity on 2024/06/17 10:51

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (8) fs

537d

0/29

auto-obsoleted due to no activity on 2025/03/27 02:07

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event fs

1448d

0/29

auto-closed as invalid on 2022/09/07 06:46

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (4) fs

1094d

0/29

auto-obsoleted due to no activity on 2023/08/27 10:05

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (7) fs

740d

0/29

auto-obsoleted due to no activity on 2024/08/15 15:27

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (2) fs

1353d

0/29

auto-obsoleted due to no activity on 2022/12/10 20:40

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (3) fs

1201d

0/29

auto-obsoleted due to no activity on 2023/05/12 13:04

upstream

KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event (5) fs

995d

1005d

0/29

auto-obsoleted due to no activity on 2023/12/04 18:59

EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. ================================================================== BUG: KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event write to 0xffff888104be8a94 of 4 bytes by task 3283 on cpu 1: fsnotify_free_mark fs/notify/mark.c:584 [inline] fsnotify_destroy_mark+0xeb/0x150 fs/notify/mark.c:602 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:805 [inline] __se_sys_inotify_rm_watch+0xe8/0x170 fs/notify/inotify/inotify_user.c:786 __x64_sys_inotify_rm_watch+0x31/0x40 fs/notify/inotify/inotify_user.c:786 x64_sys_call+0xc88/0x3020 arch/x86/include/generated/asm/syscalls_64.h:256 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888104be8a94 of 4 bytes by task 3314 on cpu 0: inotify_handle_inode_event+0x34c/0x3d0 fs/notify/inotify/inotify_fsnotify.c:132 fsnotify_handle_inode_event+0x1c0/0x220 fs/notify/fsnotify.c:272 fsnotify_handle_event fs/notify/fsnotify.c:327 [inline] send_to_group fs/notify/fsnotify.c:375 [inline] fsnotify+0x15d0/0x1730 fs/notify/fsnotify.c:592 __fsnotify_parent+0x2f8/0x3a0 fs/notify/fsnotify.c:238 fsnotify_parent include/linux/fsnotify.h:96 [inline] fsnotify_path include/linux/fsnotify.h:113 [inline] fsnotify_file include/linux/fsnotify.h:127 [inline] fsnotify_close include/linux/fsnotify.h:457 [inline] __fput+0x1de/0x650 fs/file_table.c:455 fput_close_sync+0xad/0x190 fs/file_table.c:574 __do_sys_close fs/open.c:1509 [inline] __se_sys_close fs/open.c:1494 [inline] __x64_sys_close+0x55/0xf0 fs/open.c:1494 x64_sys_call+0x275d/0x3020 arch/x86/include/generated/asm/syscalls_64.h:4 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000001 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3314 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ==================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/04/05 14:37	upstream	3aae9383f42f	4440e7c2	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event
2026/03/23 19:34	upstream	c369299895a5	4933dba2	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in fsnotify_destroy_mark / inotify_handle_inode_event

Crashes (2):

Assets (help?)