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kernel BUG at fs/ocfs2/suballoc.c:2855!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 150 Comm: kworker/u4:5 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+0x24ff/0x27a0 fs/ocfs2/suballoc.c:2855
Code: fe e9 9c f3 ff ff e8 40 58 fb fd 48 c7 c7 40 8a ce 8e 48 8b 74 24 38 4c 89 fa e8 ac e7 21 01 e9 aa f3 ff ff e8 22 58 fb fd 90 <0f> 0b e8 1a 58 fb fd 90 0f 0b 4c 89 3c 24 65 8b 1d 20 0d 52 0f bf
RSP: 0018:ffffc9000173f4a0 EFLAGS: 00010293
RAX: ffffffff83ca42fe RBX: 0000000000000001 RCX: ffff888032c80000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000173f708 R08: 0000000000000020 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2023457 R12: ffff88801c9f2dc0
R13: ffff888011890b00 R14: ffff88801fd2ce00 R15: 1ffff920002e7ea8
FS:  0000000000000000(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70392ee990 CR3: 000000001220f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 _ocfs2_free_clusters+0x5c2/0xab0 fs/ocfs2/suballoc.c:2973
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5979 [inline]
 __ocfs2_flush_truncate_log+0x77f/0x12f0 fs/ocfs2/alloc.c:6062
 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6084 [inline]
 ocfs2_truncate_log_worker+0xa2/0x1a0 fs/ocfs2/alloc.c:6097
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 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+0x24ff/0x27a0 fs/ocfs2/suballoc.c:2855
Code: fe e9 9c f3 ff ff e8 40 58 fb fd 48 c7 c7 40 8a ce 8e 48 8b 74 24 38 4c 89 fa e8 ac e7 21 01 e9 aa f3 ff ff e8 22 58 fb fd 90 <0f> 0b e8 1a 58 fb fd 90 0f 0b 4c 89 3c 24 65 8b 1d 20 0d 52 0f bf
RSP: 0018:ffffc9000173f4a0 EFLAGS: 00010293
RAX: ffffffff83ca42fe RBX: 0000000000000001 RCX: ffff888032c80000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000173f708 R08: 0000000000000020 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2023457 R12: ffff88801c9f2dc0