syzbot

 sign-in | mailing list | source | docs
🐞 Open [799]
🐞 Fixed [135]
🐞 Invalid [931]
⬇ Missing Backports [77]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

kernel BUG in submit_bh_wbc (2)

Status: upstream: reported C repro on 2024/07/26 16:49
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+e2f0d8715ecd9cb1024c@syzkaller.appspotmail.com
First crash: 465d, last: 21h53m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/01/01 linux-6.1.y (ToT) 563edd786f0a C [report] kernel BUG in submit_bh_wbc
2025/01/01 upstream (ToT) ccb98ccef0e5 C Didn't crash
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in submit_bh_wbc origin:lts-only -1 C done 19 516d 944d 3/3 fixed on 2024/07/20 06:27
upstream kernel BUG at fs/buffer.c:LINE! nilfs -1 C done error 567 574d 2755d 25/29 fixed on 2024/04/10 03:59
upstream kernel BUG in submit_bh_wbc (2) udf -1 C done 123 453d 558d 27/29 fixed on 2024/08/14 03:44
linux-4.14 kernel BUG at fs/buffer.c:LINE! -1 C error 59 988d 2382d 0/1 upstream: reported C repro on 2019/04/27 19:47
linux-4.19 kernel BUG at fs/buffer.c:LINE! (2) udf ext4 -1 C error 31 995d 1809d 0/1 upstream: reported C repro on 2020/11/21 07:48
android-54 kernel BUG at fs/buffer.c:LINE! ext4 -1 C 4762 163d 2114d 0/2 upstream: reported C repro on 2020/01/21 13:12
upstream kernel BUG in submit_bh_wbc (3) nilfs fs -1 C done 18 379d 386d 28/29 fixed on 2024/11/12 23:31
linux-5.15 kernel BUG in submit_bh_wbc -1 C error 8 606d 884d 0/3 auto-obsoleted due to no activity on 2024/06/16 14:58
upstream kernel BUG in submit_bh_wbc nilfs -1 C done 10 559d 568d 25/29 fixed on 2024/04/24 18:26
android-6-1 kernel BUG in submit_bh_wbc missing-backport origin:lts -1 C done done 2248 19h37m 873d 0/2 upstream: reported C repro on 2023/06/15 00:20
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/02/18 02:31 3h04m fix candidate upstream OK (0) job log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2666!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4427 Comm: kmmpd-loop0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:submit_bh_wbc+0x4ac/0x4d0 fs/buffer.c:2666
Code: 01 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c c0 fe ff ff 48 89 ef e8 d5 68 e2 ff e9 b3 fe ff ff e8 7b 4c 92 ff 0f 0b e8 74 4c 92 ff <0f> 0b e8 6d 4c 92 ff 0f 0b e8 66 4c 92 ff 0f 0b e8 5f 4c 92 ff 0f
RSP: 0018:ffffc900032d7cc8 EFLAGS: 00010293
RAX: ffffffff81ee83ac RBX: 0000000000000000 RCX: ffff888075ad8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000003801 R08: dffffc0000000000 R09: ffffed100e111997
R10: ffffed100e111997 R11: 1ffff1100e111996 R12: 1ffff1100e111996
R13: 0000000000000000 R14: ffff88807088ccb0 R15: ffff88807a39a000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0fbd9e0000 CR3: 000000002e29f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 write_mmp_block_thawed+0x360/0x4f0 fs/ext4/mmp.c:51
 write_mmp_block+0x13e/0x3a0 fs/ext4/mmp.c:67
 kmmpd+0x6f7/0x980 fs/ext4/mmp.c:246
 kthread+0x29d/0x330 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:submit_bh_wbc+0x4ac/0x4d0 fs/buffer.c:2666
Code: 01 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c c0 fe ff ff 48 89 ef e8 d5 68 e2 ff e9 b3 fe ff ff e8 7b 4c 92 ff 0f 0b e8 74 4c 92 ff <0f> 0b e8 6d 4c 92 ff 0f 0b e8 66 4c 92 ff 0f 0b e8 5f 4c 92 ff 0f
RSP: 0018:ffffc900032d7cc8 EFLAGS: 00010293
RAX: ffffffff81ee83ac RBX: 0000000000000000 RCX: ffff888075ad8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000003801 R08: dffffc0000000000 R09: ffffed100e111997
R10: ffffed100e111997 R11: 1ffff1100e111996 R12: 1ffff1100e111996
R13: 0000000000000000 R14: ffff88807088ccb0 R15: ffff88807a39a000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0fbd9e0000 CR3: 000000007d8e1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (228):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/07 00:38 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/05/18 23:04 linux-6.1.y 325285d9fc86 f41472b0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/02/23 15:27 linux-6.1.y 3a8358583626 d34966d1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2024/12/28 12:40 linux-6.1.y 563edd786f0a d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2024/12/21 18:55 linux-6.1.y 29f02ec58a94 d7f584ee .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2024/11/04 00:06 linux-6.1.y 7c15117f9468 f00eed24 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/11/03 17:31 linux-6.1.y f6e38ae624cf 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/10/30 01:15 linux-6.1.y f6e38ae624cf fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/10/17 11:30 linux-6.1.y c2fda4b3f577 7adf5298 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/09/28 14:23 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/09/26 20:20 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/09/26 02:13 linux-6.1.y 7b34dc04e4ff 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/09/11 11:40 linux-6.1.y f97f1002271b fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/09/06 21:14 linux-6.1.y 28c695c365e1 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/08/29 07:27 linux-6.1.y f89b6e15694c d401b9d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/08/28 17:38 linux-6.1.y f89b6e15694c e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/08/26 18:49 linux-6.1.y 0bc96de781b4 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/08/19 15:46 linux-6.1.y 0bc96de781b4 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/08/02 01:42 linux-6.1.y 3594f306da12 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/07/25 09:08 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/07/21 07:38 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/06/09 16:33 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/05/15 06:04 linux-6.1.y 02b72ccb5f9d d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/05/07 03:04 linux-6.1.y ac7079a42ea5 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/23 06:49 linux-6.1.y 420102835862 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/21 10:16 linux-6.1.y 420102835862 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/19 21:03 linux-6.1.y 420102835862 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/17 18:00 linux-6.1.y 420102835862 229db4cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/16 09:09 linux-6.1.y 420102835862 a95239b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/11 13:38 linux-6.1.y 420102835862 94486846 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/08 19:36 linux-6.1.y 3dfebb87d7eb a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/04/05 03:47 linux-6.1.y 8e60a714ba3b c53ea9c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/24 09:04 linux-6.1.y 344a09659766 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/18 23:51 linux-6.1.y 344a09659766 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/17 18:14 linux-6.1.y 344a09659766 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/15 19:21 linux-6.1.y 344a09659766 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/14 20:10 linux-6.1.y 344a09659766 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/09 12:38 linux-6.1.y 6ae7ac5c4251 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/09 03:37 linux-6.1.y 6ae7ac5c4251 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/03/08 04:24 linux-6.1.y 6ae7ac5c4251 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/10/17 18:59 linux-6.1.y c2fda4b3f577 7adf5298 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/06/18 08:49 linux-6.1.y 58485ff1a74f e77fae15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/05/30 09:53 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/05/24 20:35 linux-6.1.y da3c5173c55f ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/05/11 00:34 linux-6.1.y 02b72ccb5f9d 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/04/18 05:33 linux-6.1.y 420102835862 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/04/16 19:10 linux-6.1.y 420102835862 a95239b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/04/08 18:11 linux-6.1.y 3dfebb87d7eb a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/31 18:46 linux-6.1.y 8e60a714ba3b d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/27 14:34 linux-6.1.y 344a09659766 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/12 10:11 linux-6.1.y 6ae7ac5c4251 ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/12 09:04 linux-6.1.y 6ae7ac5c4251 ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/10 23:49 linux-6.1.y 6ae7ac5c4251 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/09 16:34 linux-6.1.y 6ae7ac5c4251 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/03/08 18:54 linux-6.1.y 6ae7ac5c4251 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2024/07/26 16:49 linux-6.1.y c18e82d3ee44 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
* Struck through repros no longer work on HEAD.