------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:2595!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5356 Comm: syz.0.0 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
RIP: 0010:_ocfs2_free_suballoc_bits+0x1186/0x1330 fs/ocfs2/suballoc.c:2595
Code: 50 63 76 fe 49 8b 3c 24 4c 89 f6 48 8b 54 24 18 48 8b 4c 24 50 4c 8b 44 24 10 e8 95 9f 00 00 e9 0d 01 00 00 e8 8b b8 0e fe 90 <0f> 0b e8 83 b8 0e fe 90 0f 0b f3 0f 1e fa 65 8b 1d 49 71 ce 0e bf
RSP: 0018:ffffc9000df06b80 EFLAGS: 00010287
RAX: ffffffff83b24ed5 RBX: 00000000000001ff RCX: 0000000000100000
RDX: ffffc90021b94000 RSI: 000000000004f24c RDI: 000000000004f24d
RBP: ffffc9000df06d28 R08: ffffffff8f824677 R09: 1ffffffff1f048ce
R10: dffffc0000000000 R11: fffffbfff1f048cf R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8880457b83a0 R15: 0000000000000200
FS:  00007f298eb756c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febc40ff120 CR3: 00000000114da000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 _ocfs2_free_clusters+0x5d4/0xa50 fs/ocfs2/suballoc.c:2683
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5979 [inline]
 __ocfs2_flush_truncate_log+0x75d/0x1150 fs/ocfs2/alloc.c:6062
 ocfs2_remove_btree_range+0x704/0x1540 fs/ocfs2/alloc.c:5753
 ocfs2_commit_truncate+0xb97/0x2230 fs/ocfs2/alloc.c:7374
 ocfs2_truncate_file+0xc94/0x13e0 fs/ocfs2/file.c:509
 ocfs2_setattr+0x155e/0x1bb0 fs/ocfs2/file.c:1218
 notify_change+0xc1a/0xf40 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 vfs_truncate+0x493/0x520 fs/open.c:118
 do_sys_truncate+0xdb/0x190 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:151
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f298dd8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f298eb75038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f298dfe6270 RCX: 00007f298dd8f7c9
RDX: 0000000000000000 RSI: 0000000000000c88 RDI: 0000200000000100
RBP: 00007f298de13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f298dfe6308 R14: 00007f298dfe6270 R15: 00007ffc71676578
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_ocfs2_free_suballoc_bits+0x1186/0x1330 fs/ocfs2/suballoc.c:2595
Code: 50 63 76 fe 49 8b 3c 24 4c 89 f6 48 8b 54 24 18 48 8b 4c 24 50 4c 8b 44 24 10 e8 95 9f 00 00 e9 0d 01 00 00 e8 8b b8 0e fe 90 <0f> 0b e8 83 b8 0e fe 90 0f 0b f3 0f 1e fa 65 8b 1d 49 71 ce 0e bf
RSP: 0018:ffffc9000df06b80 EFLAGS: 00010287
RAX: ffffffff83b24ed5 RBX: 00000000000001ff RCX: 0000000000100000
RDX: ffffc90021b94000 RSI: 000000000004f24c RDI: 000000000004f24d
RBP: ffffc9000df06d28 R08: ffffffff8f824677 R09: 1ffffffff1f048ce
R10: dffffc0000000000 R11: fffffbfff1f048cf R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8880457b83a0 R15: 0000000000000200
FS:  00007f298eb756c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febc40ff120 CR3: 00000000114da000 CR4: 0000000000352ef0