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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: 652d, last: 1d07h
▶ ▼ 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 703d 1131d 3/3 fixed on 2024/07/20 06:27
upstream kernel BUG at fs/buffer.c:LINE! nilfs -1 C done error 567 761d 2942d 25/29 fixed on 2024/04/10 03:59
upstream kernel BUG in submit_bh_wbc (2) udf -1 C done 123 639d 745d 27/29 fixed on 2024/08/14 03:44
linux-4.14 kernel BUG at fs/buffer.c:LINE! -1 C error 59 1175d 2569d 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 1182d 1996d 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 350d 2300d 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 566d 573d 28/29 fixed on 2024/11/12 23:31
linux-5.15 kernel BUG in submit_bh_wbc -1 C error 8 792d 1070d 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 746d 755d 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 2462 1d15h 1060d 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: 4681 Comm: kmmpd-loop0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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 61 e2 ff e9 b3 fe ff ff e8 8b 30 92 ff 0f 0b e8 84 30 92 ff <0f> 0b e8 7d 30 92 ff 0f 0b e8 76 30 92 ff 0f 0b e8 6f 30 92 ff 0f
RSP: 0018:ffffc90003f47cc8 EFLAGS: 00010293
RAX: ffffffff81eeaf4c RBX: 0000000000000000 RCX: ffff88802d131dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000003801 R08: dffffc0000000000 R09: ffffed100e4f52cc
R10: ffffed100e4f52cc R11: 1ffff1100e4f52cb R12: 1ffff1100e4f52cb
R13: 0000000000000000 R14: ffff8880727a9658 R15: ffff88807a308000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fac78273000 CR3: 000000002eb25000 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+0x337/0x980 fs/ext4/mmp.c:178
 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 61 e2 ff e9 b3 fe ff ff e8 8b 30 92 ff 0f 0b e8 84 30 92 ff <0f> 0b e8 7d 30 92 ff 0f 0b e8 76 30 92 ff 0f 0b e8 6f 30 92 ff 0f
RSP: 0018:ffffc90003f47cc8 EFLAGS: 00010293
RAX: ffffffff81eeaf4c RBX: 0000000000000000 RCX: ffff88802d131dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000003801 R08: dffffc0000000000 R09: ffffed100e4f52cc
R10: ffffed100e4f52cc R11: 1ffff1100e4f52cb R12: 1ffff1100e4f52cb
R13: 0000000000000000 R14: ffff8880727a9658 R15: ffff88807a308000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f07e5b72a60 CR3: 00000000738ec000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (267):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/19 21:35 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
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
2026/04/04 14:58 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 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
2026/05/08 13:45 linux-6.1.y 128a674368bf b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/05/05 10:51 linux-6.1.y 4931e0e1673d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/05/05 10:51 linux-6.1.y 4931e0e1673d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/05/04 20:53 linux-6.1.y 4931e0e1673d a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/04/18 03:05 linux-6.1.y 8e8fc038cad5 5be7a9de .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/02/07 18:49 linux-6.1.y 0182cb5b74ee 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/02/02 21:54 linux-6.1.y cd9b81672742 d78927dd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/01/23 22:45 linux-6.1.y cd9b81672742 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/01/17 02:29 linux-6.1.y bec0e10ee67e 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/01/15 08:05 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/01/07 14:51 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2026/01/04 07:33 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/12/31 15:18 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/12/27 01:39 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/12/24 18:00 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/12/20 09:34 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/12/19 16:48 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/12/11 01:37 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/11/07 23:50 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/11/07 01:33 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in submit_bh_wbc
2025/11/06 12:48 linux-6.1.y f6e38ae624cf a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan 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
2026/05/09 05:32 linux-6.1.y 128a674368bf 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/05/08 01:16 linux-6.1.y 4931e0e1673d 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/05/06 12:40 linux-6.1.y 4931e0e1673d 1dddfd3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/05/01 23:57 linux-6.1.y 4931e0e1673d 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/04/27 15:29 linux-6.1.y 7c87defbd336 0f700595 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/04/24 05:37 linux-6.1.y 7c87defbd336 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/03/01 23:01 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2026/01/09 01:54 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 submit_bh_wbc
2025/12/09 19:36 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 submit_bh_wbc
2025/11/15 12:08 linux-6.1.y f6e38ae624cf f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in submit_bh_wbc
2025/11/06 16:28 linux-6.1.y f6e38ae624cf a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 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
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.