------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:2568!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 3073 Comm: kworker/u4:16 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: ocfs2_wq ocfs2_truncate_log_worker
RIP: 0010:_ocfs2_free_suballoc_bits+0x108a/0x1330 fs/ocfs2/suballoc.c:2568
Code: 4c 89 f1 e9 87 f9 ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 95 fb ff ff 48 89 df e8 31 67 76 fe e9 88 fb ff ff e8 17 8a 0e fe 90 <0f> 0b e8 0f 8a 0e fe 90 0f 0b f3 0f 1e fa 65 44 8b 25 e4 d9 eb 0e
RSP: 0018:ffffc9000b2ef4a0 EFLAGS: 00010293
RAX: ffffffff83b33639 RBX: ffff888056641e00 RCX: ffff88803a40c980
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc9000b2ef648 R08: 0000000000000020 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1f4430f R12: ffff88801241d528
R13: dffffc0000000000 R14: 00000000ffffffff R15: 0000000000000004
FS:  0000000000000000(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f915ab85d50 CR3: 0000000037e85000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 _ocfs2_free_clusters+0x5d4/0xa50 fs/ocfs2/suballoc.c:2672
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5979 [inline]
 __ocfs2_flush_truncate_log+0x75d/0x1150 fs/ocfs2/alloc.c:6062
 ocfs2_flush_truncate_log fs/ocfs2/alloc.c:6084 [inline]
 ocfs2_truncate_log_worker+0xa2/0x190 fs/ocfs2/alloc.c:6097
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_ocfs2_free_suballoc_bits+0x108a/0x1330 fs/ocfs2/suballoc.c:2568
Code: 4c 89 f1 e9 87 f9 ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 95 fb ff ff 48 89 df e8 31 67 76 fe e9 88 fb ff ff e8 17 8a 0e fe 90 <0f> 0b e8 0f 8a 0e fe 90 0f 0b f3 0f 1e fa 65 44 8b 25 e4 d9 eb 0e
RSP: 0018:ffffc9000b2ef4a0 EFLAGS: 00010293
RAX: ffffffff83b33639 RBX: ffff888056641e00 RCX: ffff88803a40c980
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc9000b2ef648 R08: 0000000000000020 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1f4430f R12: ffff88801241d528
R13: dffffc0000000000 R14: 00000000ffffffff R15: 0000000000000004
FS:  0000000000000000(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f915ab85d50 CR3: 000000001a23d000 CR4: 0000000000352ef0