JBD2: I/O error when updating journal superblock for loop3-29. (jbd2/loop3-29,2644,0):ocfs2_abort_trigger:596 ERROR: ocfs2_abort_trigger called by JBD2. bh = 0xffff88810eaa1f18, bh->b_blocknr = 16969 OCFS2: ERROR (device (efault)): void ocfs2_abort_trigger(struct jbd2_buffer_trigger_type *, struct buffer_head *): JBD2 has aborted our journal, ocfs2 cannot continue BUG: kernel NULL pointer dereference, address: 0000000000000660 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 2644 Comm: jbd2/loop3-29 Not tainted 6.1.142-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:ocfs2_handle_error+0xb/0x110 fs/ocfs2/super.c:2532 Code: 00 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 60 75 07 48 8d 65 f8 5b 5d c3 e8 12 8d 01 00 66 90 55 41 57 41 56 41 54 53 49 89 fe <4c> 8b bf 60 06 00 00 49 8d 9f 00 01 00 00 48 89 df e8 7f c3 02 00 RSP: 0018:ffffc900027f3c30 EFLAGS: 00010246 RAX: 00000000000000a6 RBX: 0000000000000000 RCX: 2e06874daf6b1000 RDX: ffff88813bc27040 RSI: ffffffff83044434 RDI: 0000000000000000 RBP: ffffc900027f3ce0 R08: ffffffff834bfc80 R09: 0000000000001fff R10: ffffffff8348fc20 R11: 0000000000005ffd R12: ffff888146e4a768 R13: ffff888146e4a000 R14: 0000000000000000 R15: ffff88810c319140 FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000660 CR3: 00000001023cb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ocfs2_error+0x82/0xa0 fs/ocfs2/super.c:2575 ocfs2_abort_trigger+0x61/0x80 fs/ocfs2/journal.c:598 jbd2_journal_commit_transaction+0xa38/0x1a20 fs/jbd2/commit.c:623 kjournald2+0xb2/0x250 fs/jbd2/journal.c:210 kthread+0xcc/0xe0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: CR2: 0000000000000660 ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_handle_error+0xb/0x110 fs/ocfs2/super.c:2532 Code: 00 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 60 75 07 48 8d 65 f8 5b 5d c3 e8 12 8d 01 00 66 90 55 41 57 41 56 41 54 53 49 89 fe <4c> 8b bf 60 06 00 00 49 8d 9f 00 01 00 00 48 89 df e8 7f c3 02 00 RSP: 0018:ffffc900027f3c30 EFLAGS: 00010246 RAX: 00000000000000a6 RBX: 0000000000000000 RCX: 2e06874daf6b1000 RDX: ffff88813bc27040 RSI: ffffffff83044434 RDI: 0000000000000000 RBP: ffffc900027f3ce0 R08: ffffffff834bfc80 R09: 0000000000001fff R10: ffffffff8348fc20 R11: 0000000000005ffd R12: ffff888146e4a768 R13: ffff888146e4a000 R14: 0000000000000000 R15: ffff88810c319140 FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000660 CR3: 00000001023cb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 65 48 add %ah,0x48(%rbp) 3: 8b 0c 25 28 00 00 00 mov 0x28,%ecx a: 48 3b 4c 24 60 cmp 0x60(%rsp),%rcx f: 75 07 jne 0x18 11: 48 8d 65 f8 lea -0x8(%rbp),%rsp 15: 5b pop %rbx 16: 5d pop %rbp 17: c3 ret 18: e8 12 8d 01 00 call 0x18d2f 1d: 66 90 xchg %ax,%ax 1f: 55 push %rbp 20: 41 57 push %r15 22: 41 56 push %r14 24: 41 54 push %r12 26: 53 push %rbx 27: 49 89 fe mov %rdi,%r14 * 2a: 4c 8b bf 60 06 00 00 mov 0x660(%rdi),%r15 <-- trapping instruction 31: 49 8d 9f 00 01 00 00 lea 0x100(%r15),%rbx 38: 48 89 df mov %rbx,%rdi 3b: e8 7f c3 02 00 call 0x2c3bf