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kernel BUG in submit_bh_wbc

Status: upstream: reported C repro on 2023/06/15 00:20
Bug presence: origin:lts
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+807c663f72dcf074e3e2@syzkaller.appspotmail.com
First crash: 701d, last: 12h41m
Cause bisection: introduced by (bisect log) :
commit 8d5459c11f548131ce48b2fbf45cccc5c382558f
Author: Jan Kara <jack@suse.cz>
Date: Fri May 20 11:14:02 2022 +0000

  ext4: improve write performance with disabled delalloc

Crash: kernel BUG in submit_bh_wbc (log)
Repro: C syz .config
  
Fix bisection: fixed by (bisect log) :
commit 32b9fb9a67ec70bbe3afe931b0ea44203150a49a
Author: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Date: Mon Sep 18 10:45:50 2023 +0000

  ext4: mark buffer new if it is unwritten to avoid stale data exposure

  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/03/17 lts (merge base) 883d1a956208 C [report] kernel BUG in submit_bh_wbc
2024/03/31 upstream (ToT) 18737353cca0 C Didn't crash
▶ ▼ Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in submit_bh_wbc origin:lts-only C done 19 343d 772d 3/3 fixed on 2024/07/20 06:27
upstream kernel BUG at fs/buffer.c:LINE! nilfs C done error 567 402d 2583d 25/28 fixed on 2024/04/10 03:59
upstream kernel BUG in submit_bh_wbc (2) udf C done 123 280d 386d 27/28 fixed on 2024/08/14 03:44
linux-4.14 kernel BUG at fs/buffer.c:LINE! C error 59 816d 2210d 0/1 upstream: reported C repro on 2019/04/27 19:47
linux-6.1 kernel BUG in submit_bh_wbc (2) origin:lts-only C inconclusive 199 1d04h 293d 0/3 upstream: reported C repro on 2024/07/26 16:49
linux-4.19 kernel BUG at fs/buffer.c:LINE! (2) udf ext4 C error 31 823d 1637d 0/1 upstream: reported C repro on 2020/11/21 07:48
android-54 kernel BUG at fs/buffer.c:LINE! ext4 C 4279 38m 1941d 0/2 upstream: reported C repro on 2020/01/21 13:12
upstream kernel BUG in submit_bh_wbc (3) nilfs fs C done 18 207d 214d 28/28 fixed on 2024/11/12 23:31
linux-5.15 kernel BUG in submit_bh_wbc C error 8 433d 711d 0/3 auto-obsoleted due to no activity on 2024/06/16 14:58
upstream kernel BUG in submit_bh_wbc nilfs C done 10 387d 396d 25/28 fixed on 2024/04/24 18:26
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/07/28 10:17 5m retest repro android14-6.1 report log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2024/03/11 21:14 3h12m bisect fix android14-6.1 OK (1) job log
2023/07/28 15:24 1h02m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2714!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 298 Comm: kmmpd-loop0 Not tainted 6.1.118-syzkaller-00025-gef4fb40b87a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:submit_bh_wbc+0x4cd/0x4f0 fs/buffer.c:2714
Code: c3 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c bd fe ff ff 48 89 df e8 34 c2 e6 ff e9 b0 fe ff ff e8 4a 4c 9f ff 0f 0b e8 43 4c 9f ff <0f> 0b e8 3c 4c 9f ff 0f 0b e8 35 4c 9f ff 0f 0b e8 2e 4c 9f ff 0f
RSP: 0018:ffffc90000ef7c20 EFLAGS: 00010293
RAX: ffffffff81d639fd RBX: 0000000000000000 RCX: ffff8881106ad100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000ef7c70 R08: ffffffff81d635d0 R09: ffffed102479f151
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff1102479f150 R14: ffff888123cf8a80 R15: 0000000000003801
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c0adb1ccc8 CR3: 0000000110285000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 submit_bh+0x1d/0x30 fs/buffer.c:2755
 write_mmp_block_thawed+0x3a0/0x570 fs/ext4/mmp.c:51
 write_mmp_block+0x12b/0x2a0 fs/ext4/mmp.c:67
 kmmpd+0x263/0xa10 fs/ext4/mmp.c:246
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x4cd/0x4f0 fs/buffer.c:2714
Code: c3 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c bd fe ff ff 48 89 df e8 34 c2 e6 ff e9 b0 fe ff ff e8 4a 4c 9f ff 0f 0b e8 43 4c 9f ff <0f> 0b e8 3c 4c 9f ff 0f 0b e8 35 4c 9f ff 0f 0b e8 2e 4c 9f ff 0f
RSP: 0018:ffffc90000ef7c20 EFLAGS: 00010293
RAX: ffffffff81d639fd RBX: 0000000000000000 RCX: ffff8881106ad100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000ef7c70 R08: ffffffff81d635d0 R09: ffffed102479f151
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff1102479f150 R14: ffff888123cf8a80 R15: 0000000000003801
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c70b9f6028 CR3: 000000011052f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1870):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/26 16:54 android14-6.1 ef4fb40b87a9 9fbd772e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/12/16 06:57 android14-6.1 22b7ded8b55b 7cbfbb3a .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/11/30 07:55 android14-6.1 a887a44ace2a 68914665 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/11/21 19:03 android14-6.1 51bee181735e 4b25d554 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/10/08 00:13 android14-6.1 0e8b65e41ffd d7906eff .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/09/25 06:24 android14-6.1 5c7d0d4f4a38 5643e0e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/08/20 20:36 android14-6.1 edca080b95df 9f0ab3fb .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2024/03/17 12:15 android14-6.1 ef39f76e4d24 d615901c .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2023/10/24 12:09 android14-6.1 8a67c0609445 af8d2e46 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2023/09/24 09:56 android14-6.1 060ebb378d1c 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2023/06/15 00:46 android14-6.1 60662882b7bd 76decb82 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2023/06/15 00:18 android14-6.1 60662882b7bd 76decb82 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/15 22:20 android14-6.1 218e2bd24587 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/15 15:44 android14-6.1 3cd01bb5bd37 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/14 18:03 android14-6.1 3cd01bb5bd37 a4fa04ef .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/14 14:17 android14-6.1 3cd01bb5bd37 a4fa04ef .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/14 12:45 android14-6.1 53b26534cce7 a4fa04ef .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/14 11:45 android14-6.1 53b26534cce7 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/14 11:44 android14-6.1 53b26534cce7 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/13 17:02 android14-6.1 53b26534cce7 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/13 06:38 android14-6.1 646380b087a5 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/12 16:24 android14-6.1 646380b087a5 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/12 11:12 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/12 09:15 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/12 07:08 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/11 19:20 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/11 17:31 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/11 07:32 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/11 04:40 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/09 14:30 android14-6.1 646380b087a5 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/09 00:33 android14-6.1 646380b087a5 bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/07 18:15 android14-6.1 646380b087a5 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/07 08:05 android14-6.1 48ab183a3ee2 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/07 08:05 android14-6.1 48ab183a3ee2 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/06 20:55 android14-6.1 ca2f65da73b1 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/06 18:09 android14-6.1 ca2f65da73b1 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/06 02:08 android14-6.1 7b89b57429c2 ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/05 22:27 android14-6.1 7b89b57429c2 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/05 12:41 android14-6.1 0c1a07d9c284 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/05 08:57 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/05 04:16 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/04 23:35 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/04 16:50 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/04 14:12 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/04 07:18 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/03 22:44 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/03 20:19 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/03 11:07 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/03 09:37 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/03 01:13 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/02 16:11 android14-6.1 0c1a07d9c284 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/02 09:47 android14-6.1 0c1a07d9c284 d7f099d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/05/01 11:47 android14-6.1 0c1a07d9c284 ce7952f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/04/30 20:45 android14-6.1 242f90b45e89 ce7952f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/04/30 08:37 android14-6.1 242f90b45e89 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/04/30 05:47 android14-6.1 242f90b45e89 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/04/29 22:02 android14-6.1 242f90b45e89 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/04/29 17:48 android14-6.1 242f90b45e89 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2025/04/29 04:30 android14-6.1 242f90b45e89 aeb6ec69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
2023/06/15 00:02 android14-6.1 60662882b7bd 76decb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in submit_bh_wbc
* Struck through repros no longer work on HEAD.