syzbot

 sign-in | mailing list | source | docs
🐞 Open [1510]
≡ Subsystems
🐞 Fixed [6532]
🐞 Invalid [16673]
⬇ Missing Backports [203]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

WARNING in mark_buffer_dirty (7)

Status: upstream: reported C repro on 2025/05/10 17:11
Subsystems: hfs bfs
[Documentation on labels]
Reported-by: syzbot+2327bccb02eef9291c1c@syzkaller.appspotmail.com
First crash: 116d, last: 1d17h
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [hfs?] WARNING in mark_buffer_dirty (7) 0 (1) 2025/05/10 17:11
▶ ▼ Similar bugs (14)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in mark_buffer_dirty bfs -1 C error 10 972d 1318d 0/1 upstream: reported C repro on 2022/01/20 22:23
upstream WARNING in mark_buffer_dirty (6) fs -1 C error 11669 116d 683d 28/29 fixed on 2025/05/06 15:33
upstream WARNING in mark_buffer_dirty (4) bfs nilfs -1 C inconclusive 1152 814d 1154d 22/29 fixed on 2023/06/08 14:41
android-44 WARNING in mark_buffer_dirty -1 2 2433d 2331d 0/2 auto-closed as invalid on 2019/07/01 11:44
upstream WARNING in mark_buffer_dirty fs -1 C 21 2462d 2845d 0/29 closed as invalid on 2019/07/24 04:22
linux-4.14 WARNING in mark_buffer_dirty (2) nilfs2 -1 C error 8 915d 1298d 0/1 upstream: reported C repro on 2022/02/10 08:17
upstream WARNING in mark_buffer_dirty (2) ext4 -1 665 1964d 2097d 0/29 auto-closed as invalid on 2020/07/14 01:44
linux-6.6 WARNING in mark_buffer_dirty origin:lts-only -1 C inconclusive 16 1d07h 49d 0/2 upstream: reported C repro on 2025/07/12 17:25
upstream WARNING in mark_buffer_dirty (5) nilfs -1 C done 172 691d 810d 23/29 fixed on 2023/10/12 12:48
upstream WARNING in mark_buffer_dirty (3) ext4 -1 2 1646d 1658d 0/29 auto-closed as invalid on 2021/06/27 09:01
android-49 WARNING in mark_buffer_dirty -1 7 2278d 2331d 0/3 auto-closed as invalid on 2019/10/25 08:47
linux-4.14 WARNING in mark_buffer_dirty -1 1 2058d 2058d 0/1 auto-closed as invalid on 2020/05/11 07:45
linux-5.15 WARNING in mark_buffer_dirty origin:upstream -1 C error 290 1d04h 899d 0/3 upstream: reported C repro on 2023/03/15 22:22
linux-6.1 WARNING in mark_buffer_dirty origin:upstream -1 C error 352 49d 901d 0/3 upstream: reported C repro on 2023/03/13 14:09

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5710 at fs/buffer.c:1183 mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1183
Modules linked in:
CPU: 0 UID: 0 PID: 5710 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1183
Code: 4c 89 f7 e8 d9 4b dd ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 d4 02 fc ff e8 0f 5f 78 ff eb 8c e8 08 5f 78 ff 90 <0f> 0b 90 e9 95 fd ff ff e8 fa 5e 78 ff 90 0f 0b 90 e9 bf fd ff ff
RSP: 0018:ffffc9000d8ef608 EFLAGS: 00010293
RAX: ffffffff82475c38 RBX: ffff8880447013a0 RCX: ffff888011e44880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffff88804dfd2001 R08: ffff8880447013a7 R09: 1ffff110088e0274
R10: dffffc0000000000 R11: ffffed10088e0275 R12: ffff888045f1c000
R13: ffff8880446fe3a0 R14: ffff8880447013a0 R15: 000000000000000b
FS:  00007f51709b76c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5170995fc8 CR3: 000000004270f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x5da/0xae0 fs/bfs/file.c:126
 __block_write_begin_int+0x6b5/0x1900 fs/buffer.c:2145
 block_write_begin+0x8a/0x120 fs/buffer.c:2256
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:180
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4175
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4318
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f516fb8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f51709b7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f516fdb5fa0 RCX: 00007f516fb8ebe9
RDX: 0000000000000020 RSI: 0000200000000b80 RDI: 0000000000000005
RBP: 00007f516fc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f516fdb6038 R14: 00007f516fdb5fa0 R15: 00007ffe61bbc958
 </TASK>

Crashes (512):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/26 03:58 upstream b6add54ba618 bf27483f .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/05/17 14:18 upstream 172a9d94339c f41472b0 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/05/06 21:50 upstream 0d8d44db295c 350f4ffc .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/05/06 21:08 upstream 0d8d44db295c 350f4ffc .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/05/06 20:16 upstream 0d8d44db295c 350f4ffc .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/29 18:20 upstream fb679c832b64 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/29 15:23 upstream 07d9df80082b 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/29 09:40 upstream 07d9df80082b 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/09 12:35 upstream 0227b49b5027 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/09 02:01 upstream 37816488247d 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/08 06:43 upstream bec077162bd0 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/07 20:01 upstream 6e64f4580381 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/07 17:51 upstream 6e64f4580381 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in mark_buffer_dirty
2025/07/31 23:20 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in mark_buffer_dirty
2025/05/26 07:42 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in mark_buffer_dirty
2025/08/29 05:51 upstream 07d9df80082b d401b9d7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/26 05:01 upstream b6add54ba618 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/26 02:41 upstream b6add54ba618 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/22 13:49 upstream 3957a5720157 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/22 09:07 upstream 3957a5720157 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/21 04:58 upstream 41cd3fd15263 0b9605c8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/17 13:23 upstream 99bade344cfa dcc075fb .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/15 00:28 upstream 0cc53520e68b dcc075fb .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/12 03:09 upstream 8f5ae30d69d7 c06e8995 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/08/04 20:53 upstream d2eedaa3909b abdcb213 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/28 23:44 upstream 038d61fd6422 6654ea9c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/28 21:34 upstream 038d61fd6422 6654ea9c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/28 20:35 upstream 038d61fd6422 6654ea9c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/28 05:17 upstream b711733e89a3 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/27 18:30 upstream ec2df4364666 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/27 15:12 upstream ec2df4364666 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/27 12:15 upstream ec2df4364666 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/27 06:58 upstream 302f88ff3584 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/27 01:29 upstream 302f88ff3584 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/27 00:21 upstream 302f88ff3584 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/26 13:25 upstream 5f33ebd2018c fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/26 09:20 upstream 5f33ebd2018c fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/26 01:52 upstream 2942242dde89 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/25 12:00 upstream 94ce1ac2c9b4 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/25 10:30 upstream 94ce1ac2c9b4 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/25 09:30 upstream 94ce1ac2c9b4 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/25 05:55 upstream 94ce1ac2c9b4 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/25 03:35 upstream 94ce1ac2c9b4 fb8f743d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/25 00:11 upstream 25fae0b93d1d 65d60d73 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/24 20:08 upstream 25fae0b93d1d 65d60d73 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/24 03:31 upstream f9af7b5d9349 0c1d6ded .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/07/23 16:21 upstream 89be9a83ccf1 e0b9ac93 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mark_buffer_dirty
2025/06/29 10:22 linux-next 2aeda9592360 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in mark_buffer_dirty
2025/08/13 12:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mark_buffer_dirty
2025/08/11 18:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mark_buffer_dirty
2025/08/08 15:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 987b750d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mark_buffer_dirty
2025/08/07 16:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mark_buffer_dirty
2025/08/07 11:15 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mark_buffer_dirty
* Struck through repros no longer work on HEAD.