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divide error in do_journal_end

Status: upstream: reported C repro on 2023/12/30 01:46
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+9e58b6fea5933362e394@syzkaller.appspotmail.com
First crash: 674d, last: 49d
Fix commit to backport (bisect log) :
tree: upstream
commit fb6f20ecb121cef4d7946f834a6ee867c4e21b4a
Author: Jan Kara <jack@suse.cz>
Date: Thu Oct 17 10:28:23 2024 +0000

  reiserfs: The last commit

  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/12/12 linux-6.1.y (ToT) e4d90d63d385 C [report] divide error in do_journal_end
2023/12/30 upstream (ToT) f016f7547aee C [report] divide error in do_journal_end
2024/12/12 upstream (ToT) 231825b2e1ff C Didn't crash
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream divide error in do_journal_end fs 2 2 1810d 1837d 0/29 auto-closed as invalid on 2021/03/19 22:00
linux-4.14 divide error in do_journal_end (2) 2 C error 1 1161d 1650d 0/1 upstream: reported C repro on 2021/04/28 16:52
upstream divide error in do_journal_end (3) fs 2 C error done 83 666d 1046d 0/29 auto-obsoleted due to no activity on 2024/04/14 06:39
upstream divide error in do_journal_end (2) erofs 2 C inconclusive 2 1637d 1636d 20/29 fixed on 2021/11/10 00:50
linux-6.6 divide error in do_journal_end origin:lts-only 2 C 4 3d06h 47d 0/2 upstream: reported C repro on 2025/09/17 14:39
linux-5.15 divide error in do_journal_end missing-backport origin:upstream 2 C done 426 1d17h 849d 0/3 upstream: reported C repro on 2023/07/08 18:42
linux-4.19 divide error in do_journal_end (3) reiserfs 2 C error 1 1011d 1011d 0/1 upstream: reported C repro on 2023/01/27 02:59
linux-4.19 divide error in do_journal_end (2) 2 C done 4 1576d 1687d 1/1 fixed on 2021/08/12 11:53
linux-4.14 divide error in do_journal_end 2 C done 1 1760d 1820d 1/1 fixed on 2021/02/21 17:18
linux-4.19 divide error in do_journal_end 2 C done 2 1772d 1832d 1/1 fixed on 2021/01/27 05:38
▶ ▼ Fix bisection attempts (7)
Created Duration User Patch Repo Result
2025/01/30 18:55 5h46m fix candidate upstream OK (1) job log
2024/10/15 00:45 0m bisect fix linux-6.1.y error job log
2024/09/04 17:00 1h47m bisect fix linux-6.1.y OK (0) job log log
2024/07/30 18:51 1h15m bisect fix linux-6.1.y OK (0) job log log
2024/06/13 09:57 1h12m bisect fix linux-6.1.y OK (0) job log log
2024/03/11 07:45 1h04m bisect fix linux-6.1.y OK (0) job log log
2024/02/01 19:32 59m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
REISERFS warning: reiserfs-5090 is_tree_node: node level 0 does not match to the expected one -1
REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 0. Fsck?
REISERFS (device loop0): Remounting filesystem read-only
divide error: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4369 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:do_journal_end+0x12d4/0x4790 fs/reiserfs/journal.c:4093
Code: 0f b6 04 28 84 c0 0f 85 f0 2f 00 00 49 8d 44 1c 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 29 84 c9 0f 85 f7 2f 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4c 03 74 24 40 48 8b 84 24 f0 00 00 00 42 80 3c
RSP: 0018:ffffc90003357700 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078747000
RBP: ffffc90003357990 R08: dffffc0000000000 R09: ffff888078746000
R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88807b308017 R15: ffff88807b308014
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd8d977750 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_journal_release+0x4eb/0x540 fs/reiserfs/journal.c:1940
 journal_release+0x1b/0x30 fs/reiserfs/journal.c:1971
 reiserfs_put_super+0x21e/0x480 fs/reiserfs/super.c:616
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x93e/0x2400 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1031
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd8c238ebe9
Code: Unable to access opcode bytes at 0x7fd8c238ebbf.
RSP: 002b:00007ffd8d979848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fd8c2411c77 RCX: 00007fd8c238ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000010 R08: 00007ffd8d9775e6 R09: 00007ffd8d97ab00
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd8d97ab00
R13: 00007fd8c2411c05 R14: 000055556f48d4a8 R15: 00007ffd8d97bbd0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_journal_end+0x12d4/0x4790 fs/reiserfs/journal.c:4093
Code: 0f b6 04 28 84 c0 0f 85 f0 2f 00 00 49 8d 44 1c 01 4c 89 f1 48 c1 e9 03 42 0f b6 0c 29 84 c9 0f 85 f7 2f 00 00 41 8b 0f 31 d2 <48> f7 f1 49 89 d6 4c 03 74 24 40 48 8b 84 24 f0 00 00 00 42 80 3c
RSP: 0018:ffffc90003357700 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078747000
RBP: ffffc90003357990 R08: dffffc0000000000 R09: ffff888078746000
R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88807b308017 R15: ffff88807b308014
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd8d977750 CR3: 000000007e0ef000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
   4:	84 c0                	test   %al,%al
   6:	0f 85 f0 2f 00 00    	jne    0x2ffc
   c:	49 8d 44 1c 01       	lea    0x1(%r12,%rbx,1),%rax
  11:	4c 89 f1             	mov    %r14,%rcx
  14:	48 c1 e9 03          	shr    $0x3,%rcx
  18:	42 0f b6 0c 29       	movzbl (%rcx,%r13,1),%ecx
  1d:	84 c9                	test   %cl,%cl
  1f:	0f 85 f7 2f 00 00    	jne    0x301c
  25:	41 8b 0f             	mov    (%r15),%ecx
  28:	31 d2                	xor    %edx,%edx
* 2a:	48 f7 f1             	div    %rcx <-- trapping instruction
  2d:	49 89 d6             	mov    %rdx,%r14
  30:	4c 03 74 24 40       	add    0x40(%rsp),%r14
  35:	48 8b 84 24 f0 00 00 	mov    0xf0(%rsp),%rax
  3c:	00
  3d:	42                   	rex.X
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c

Crashes (127):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/01 09:55 linux-6.1.y f89b6e15694c 807a3b61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/06 18:09 linux-6.1.y 3a8358583626 831e3629 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 19:42 linux-6.1.y 3a8358583626 c3901742 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan divide error in do_journal_end
2024/04/08 11:29 linux-6.1.y 347385861c50 ca620dd8 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan divide error in do_journal_end
2023/12/30 01:45 linux-6.1.y 4aa6747d9352 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan divide error in do_journal_end
2025/09/15 23:57 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/09/01 07:38 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/06/16 13:37 linux-6.1.y 58485ff1a74f d1716036 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/06/02 02:16 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/06 05:32 linux-6.1.y 3a8358583626 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/05 17:09 linux-6.1.y 3a8358583626 60f5d8d9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 23:01 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 18:47 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 18:25 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 18:03 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 17:36 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 17:36 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 17:33 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2025/03/03 17:30 linux-6.1.y 3a8358583626 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/10/23 11:01 linux-6.1.y 7ec6f9fa3d97 15fa2979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/14 04:16 linux-6.1.y 909ba1f1b414 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/14 04:16 linux-6.1.y 909ba1f1b414 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/14 04:16 linux-6.1.y 909ba1f1b414 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/14 04:16 linux-6.1.y 909ba1f1b414 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/14 00:52 linux-6.1.y 909ba1f1b414 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 18:45 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 18:42 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 18:42 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 18:39 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 18:36 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 18:36 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 01:58 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 01:58 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/13 01:58 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:59 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:53 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:51 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:50 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:49 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:49 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:49 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:39 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:39 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:37 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:36 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:33 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:31 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
2024/05/12 21:30 linux-6.1.y 909ba1f1b414 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan divide error in do_journal_end
* Struck through repros no longer work on HEAD.