------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:2902!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 13 Comm: kworker/u4:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: ocfs2_wq ocfs2_truncate_log_worker
RIP: 0010:_ocfs2_free_suballoc_bits+0x24f9/0x2760 fs/ocfs2/suballoc.c:2902
Code: fe e9 84 f3 ff ff e8 46 bc d7 fd 48 c7 c7 20 b8 13 8f 48 8b 74 24 38 4c 89 e2 e8 c2 02 23 01 e9 8e f3 ff ff e8 28 bc d7 fd 90 <0f> 0b e8 20 bc d7 fd 90 0f 0b 65 8b 1d 7a aa 7e 0f bf 07 00 00 00
RSP: 0018:ffffc9000026f4a0 EFLAGS: 00010293
RAX: ffffffff83eec5a8 RBX: 00000000ffffffff RCX: ffff88801b7d8000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc9000026f708 R08: 0000000000000020 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff20af57f R12: ffff8880125bf808
R13: 1ffff110024b7f01 R14: 1ffff9200004dea8 R15: ffff8880120eae00
FS:  0000000000000000(0000) GS:ffff88808c549000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e8b83f4168 CR3: 0000000012766000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 _ocfs2_free_clusters+0x5c6/0xa80 fs/ocfs2/suballoc.c:3020
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5988 [inline]
 __ocfs2_flush_truncate_log+0x762/0x1230 fs/ocfs2/alloc.c:6071
 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6093 [inline]
 ocfs2_truncate_log_worker+0xa2/0x1a0 fs/ocfs2/alloc.c:6106
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_ocfs2_free_suballoc_bits+0x24f9/0x2760 fs/ocfs2/suballoc.c:2902
Code: fe e9 84 f3 ff ff e8 46 bc d7 fd 48 c7 c7 20 b8 13 8f 48 8b 74 24 38 4c 89 e2 e8 c2 02 23 01 e9 8e f3 ff ff e8 28 bc d7 fd 90 <0f> 0b e8 20 bc d7 fd 90 0f 0b 65 8b 1d 7a aa 7e 0f bf 07 00 00 00
RSP: 0018:ffffc9000026f4a0 EFLAGS: 00010293
RAX: ffffffff83eec5a8 RBX: 00000000ffffffff RCX: ffff88801b7d8000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc9000026f708 R08: 0000000000000020 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff20af57f R12: ffff8880125bf808