general protection fault in ocfs2_handle_error

Status: upstream: reported C repro on 2024/10/28 05:09
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+05107c8f44a6f9b272e6@syzkaller.appspotmail.com
First crash: 746d, last: 4d10h
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: BUG: unable to handle kernel NULL pointer dereference in ocfs2_handle_error (log)
Repro: C syz .config
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2025/03/25 linux-6.1.y (ToT) 344a09659766 C [report] general protection fault in ocfs2_handle_error
2024/11/01 upstream (ToT) 6c52d4da1c74 C [report] INFO: task hung in flush_delayed_work
2025/03/25 upstream (ToT) 2df0c02dab82 C Didn't crash
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2025/07/05 19:33 2h50m fix candidate upstream OK (0) job log
2025/07/01 17:12 2h41m bisect fix linux-6.1.y OK (0) job log log
2025/03/17 01:54 1h49m bisect fix linux-6.1.y OK (0) job log log
2025/02/13 12:49 2h09m bisect fix linux-6.1.y OK (0) job log log
2025/01/10 08:55 1h26m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
OCFS2: ERROR (device (efault)): void ocfs2_abort_trigger(struct jbd2_buffer_trigger_type *, struct buffer_head *): JBD2 has aborted our journal, ocfs2 cannot continue
general protection fault, probably for non-canonical address 0xdffffc00000000cf: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000678-0x000000000000067f]
CPU: 1 PID: 4429 Comm: jbd2/loop0-29 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ocfs2_handle_error+0x2a/0x250 fs/ocfs2/super.c:2530
Code: 55 41 57 41 56 41 55 41 54 53 48 89 fb 49 bd 00 00 00 00 00 fc ff df e8 44 ac 5a f7 4c 8d b3 78 06 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 67 e9 ab f7 4d 8b 26 4d 8d b4 24
RSP: 0018:ffffc90003487788 EFLAGS: 00010206
RAX: 00000000000000cf RBX: 0000000000000000 RCX: ffff88807dab9e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900034878d0 R08: ffffc90003487447 R09: 1ffff92000690e88
R10: dffffc0000000000 R11: fffff52000690e89 R12: ffffffff8acca100
R13: dffffc0000000000 R14: 0000000000000678 R15: 1ffff92000690f00
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055878c2c9328 CR3: 000000002083c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ocfs2_error+0x13a/0x1a0 fs/ocfs2/super.c:2573
 ocfs2_abort_trigger+0x108/0x140 fs/ocfs2/journal.c:602
 jbd2_journal_commit_transaction+0x1396/0x5f30 fs/jbd2/commit.c:623
 kjournald2+0x40b/0x800 fs/jbd2/journal.c:210
 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:ocfs2_handle_error+0x2a/0x250 fs/ocfs2/super.c:2530
Code: 55 41 57 41 56 41 55 41 54 53 48 89 fb 49 bd 00 00 00 00 00 fc ff df e8 44 ac 5a f7 4c 8d b3 78 06 00 00 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 67 e9 ab f7 4d 8b 26 4d 8d b4 24
RSP: 0018:ffffc90003487788 EFLAGS: 00010206
RAX: 00000000000000cf RBX: 0000000000000000 RCX: ffff88807dab9e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900034878d0 R08: ffffc90003487447 R09: 1ffff92000690e88
R10: dffffc0000000000 R11: fffff52000690e89 R12: ffffffff8acca100
R13: dffffc0000000000 R14: 0000000000000678 R15: 1ffff92000690f00
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f351c61c000 CR3: 000000002083c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	55                   	push   %rbp
   1:	41 57                	push   %r15
   3:	41 56                	push   %r14
   5:	41 55                	push   %r13
   7:	41 54                	push   %r12
   9:	53                   	push   %rbx
   a:	48 89 fb             	mov    %rdi,%rbx
   d:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  14:	fc ff df
  17:	e8 44 ac 5a f7       	call   0xf75aac60
  1c:	4c 8d b3 78 06 00 00 	lea    0x678(%rbx),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 67 e9 ab f7       	call   0xf7abe9a0
  39:	4d 8b 26             	mov    (%r14),%r12
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	b4 24                	mov    $0x24,%ah

Crashes (122):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/05 19:03 linux-6.1.y cf82dcca9634 4f7b22a0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/08/02 07:57 linux-6.1.y fb28aa725e05 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/08/09 06:40 linux-6.1.y 3594f306da12 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2024/10/28 09:03 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2024/10/28 08:11 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2024/10/28 07:11 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2024/10/28 06:03 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/03/19 05:45 linux-6.1.y f2ddafa93a25 0199f9a1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2026/11/09 02:41 linux-6.1.y c75b0cf0982c 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/11/06 18:38 linux-6.1.y 08889840163e 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/11/05 06:20 linux-6.1.y 08889840163e 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/25 18:13 linux-6.1.y 79807e970724 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/22 10:05 linux-6.1.y 79807e970724 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/18 22:31 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/10 23:31 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/10 23:17 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/10 04:07 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/10 04:03 linux-6.1.y a500ba24937a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/09 15:08 linux-6.1.y a500ba24937a b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/09/26 02:20 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/09/04 18:26 linux-6.1.y cf82dcca9634 f65209a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/07/31 05:43 linux-6.1.y fb28aa725e05 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/07/28 10:53 linux-6.1.y dc5c83b7f5f8 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/05/07 07:37 linux-6.1.y 4931e0e1673d f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/05/07 07:32 linux-6.1.y 4931e0e1673d f250db59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/03/28 21:17 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/03/27 23:45 linux-6.1.y 1989cd3d56e2 74a13a23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/02/09 00:05 linux-6.1.y 0182cb5b74ee 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/02/08 05:25 linux-6.1.y 0182cb5b74ee 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/01/01 01:29 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/12/30 01:51 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/12/30 01:49 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/12/28 08:43 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/11/25 22:25 linux-6.1.y f6e38ae624cf 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/11/10 17:53 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/10/07 09:35 linux-6.1.y 882efbdd9d34 8ef35d49 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/10/05 12:10 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/10/04 18:06 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/09/17 04:58 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/09/13 08:33 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/09/12 14:02 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/08/31 02:40 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/08/31 02:40 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/08/13 15:02 linux-6.1.y 3594f306da12 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/08/13 15:00 linux-6.1.y 3594f306da12 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2025/08/09 04:12 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2024/10/28 05:08 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan general protection fault in ocfs2_handle_error
2026/10/15 08:48 linux-6.1.y a500ba24937a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2026/08/09 17:59 linux-6.1.y e4f7d8be268e 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2026/03/19 04:35 linux-6.1.y f2ddafa93a25 0199f9a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2026/01/14 03:16 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2026/01/09 20:07 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2026/01/03 20:24 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
2025/12/27 14:36 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: unable to handle kernel paging request in ocfs2_handle_error
* Struck through repros no longer work on HEAD.