syzbot


kernel BUG in dnotify_free_mark

Status: upstream: reported C repro on 2023/07/30 07:52
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+2f4aa3239150dd006e44@syzkaller.appspotmail.com
First crash: 911d, last: 8h23m
Fix commit to backport (bisect log) :
tree: upstream
commit 4ad5c924df6cd6d85708fa23f9d9a2b78a2e428e
Author: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Date: Fri Sep 22 10:07:59 2023 +0000

  fs/ntfs3: Allow repeated call to ntfs3_put_sbi

  
Bug presence (3)
Date Name Commit Repro Result
2023/10/28 linux-6.1.y (ToT) 32c9cdbe383c C [report] kernel BUG in dnotify_free_mark
2023/07/30 upstream (ToT) d31e3792919e C [report] kernel BUG in dnotify_free_mark
2023/10/28 upstream (ToT) 2af9b20dbb39 C Didn't crash
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in dnotify_free_mark ntfs3 -1 C error done 22993 168d 1185d 29/29 fixed on 2025/11/17 09:14
linux-5.15 kernel BUG in dnotify_free_mark missing-backport origin:upstream -1 C done 608 22d 557d 0/3 upstream: reported C repro on 2024/07/18 09:21
linux-6.6 kernel BUG in dnotify_free_mark origin:lts-only -1 C inconclusive 87 7h48m 181d 0/2 upstream: reported C repro on 2025/07/29 04:21
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/11/23 13:40 3h54m fix candidate upstream OK (1) job log
2023/09/29 04:09 1h18m bisect fix linux-6.1.y OK (0) job log log
marked invalid by web-security-scanner@google.com

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/notify/dnotify/dnotify.c:136!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound fsnotify_mark_destroy_workfn
RIP: 0010:dnotify_free_mark+0x53/0x60 fs/notify/dnotify/dnotify.c:136
Code: 48 89 df e8 8f e4 dd ff 48 83 3b 00 75 17 e8 f4 8d 86 ff 48 8b 3d 1d b9 9c 0c 4c 89 f6 5b 41 5e e9 92 0d dd ff e8 dd 8d 86 ff <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 55 41 57 41 56 41 55 41 54
RSP: 0018:ffffc90000107b88 EFLAGS: 00010293
RAX: ffffffff82040513 RBX: ffff88807cfef080 RCX: ffff888017febb80
RDX: 0000000000000000 RSI: ffffffff8b0c1d20 RDI: ffff88807cfef000
RBP: ffffc90000107c50 R08: dffffc0000000000 R09: fffffbfff2256864
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881462db000
R13: ffffc90000107be0 R14: ffff88807cfef000 R15: ffff88807cfef000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36b7d95ed8 CR3: 000000007f94a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fsnotify_final_mark_destroy fs/notify/mark.c:304 [inline]
 fsnotify_mark_destroy_workfn+0x2c7/0x340 fs/notify/mark.c:928
 process_one_work+0x917/0x1260 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dnotify_free_mark+0x53/0x60 fs/notify/dnotify/dnotify.c:136
Code: 48 89 df e8 8f e4 dd ff 48 83 3b 00 75 17 e8 f4 8d 86 ff 48 8b 3d 1d b9 9c 0c 4c 89 f6 5b 41 5e e9 92 0d dd ff e8 dd 8d 86 ff <0f> 0b cc cc cc cc cc cc cc cc cc cc cc 55 41 57 41 56 41 55 41 54

Crashes (2137):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/19 13:20 linux-6.1.y 0cbb5f65e52f 9a14138f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2024/11/09 12:28 linux-6.1.y d7039b844a1c 6b856513 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2024/04/20 03:45 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2023/07/30 07:52 linux-6.1.y d2a6dc4eaf6d 92476829 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2025/12/28 13:03 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2025/12/23 05:45 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/26 13:07 linux-6.1.y cd9b81672742 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/25 23:47 linux-6.1.y cd9b81672742 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/25 23:47 linux-6.1.y cd9b81672742 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/24 12:53 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/24 00:48 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/23 12:38 linux-6.1.y cd9b81672742 e2b1b6e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/22 22:47 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/22 07:27 linux-6.1.y cd9b81672742 a16aed1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/21 19:58 linux-6.1.y cd9b81672742 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/21 08:40 linux-6.1.y cd9b81672742 6f1aa2f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/20 14:17 linux-6.1.y cd9b81672742 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/20 02:00 linux-6.1.y cd9b81672742 572effc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/19 13:11 linux-6.1.y cd9b81672742 a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/17 20:37 linux-6.1.y cd9b81672742 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/17 02:34 linux-6.1.y bec0e10ee67e 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/15 17:59 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/15 02:27 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/12 02:43 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/10 21:42 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/09 04:29 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in dnotify_free_mark
2026/01/25 16:52 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/25 09:23 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/23 13:47 linux-6.1.y cd9b81672742 e2b1b6e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/22 21:26 linux-6.1.y cd9b81672742 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/22 09:08 linux-6.1.y cd9b81672742 a16aed1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/21 21:07 linux-6.1.y cd9b81672742 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/21 21:05 linux-6.1.y cd9b81672742 8fc37797 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/20 14:23 linux-6.1.y cd9b81672742 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/20 03:02 linux-6.1.y cd9b81672742 572effc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/19 14:24 linux-6.1.y cd9b81672742 a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/19 14:22 linux-6.1.y cd9b81672742 a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/19 03:34 linux-6.1.y cd9b81672742 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/19 00:44 linux-6.1.y cd9b81672742 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/17 23:41 linux-6.1.y cd9b81672742 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/17 03:37 linux-6.1.y bec0e10ee67e 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/17 03:36 linux-6.1.y bec0e10ee67e 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/14 20:41 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/14 15:00 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/14 13:36 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/13 16:15 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/12 19:04 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/11 22:14 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/10 16:33 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
2026/01/09 05:53 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in dnotify_free_mark
* Struck through repros no longer work on HEAD.