------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1443!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5365 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_find_victim_chain fs/ocfs2/suballoc.c:1443 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x243c/0x2450 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 75 d4 16 fe 90 0f 0b e8 6d d4 16 fe 90 0f 0b e8 65 d4 16 fe 90 0f 0b e8 5d d4 16 fe 90 0f 0b e8 55 d4 16 fe 90 <0f> 0b e8 4d d4 16 fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000d356620 EFLAGS: 00010287
RAX: ffffffff83a8fa5b RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000ede1000 RSI: 0000000000003213 RDI: 0000000000003214
RBP: ffffc9000d3568b0 R08: ffffc9000d356920 R09: 0000000000000000
R10: ffffc9000d356920 R11: fffff52001a6ad29 R12: ffff88805255aa08
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100a4ab541
FS:  00007fe58e3386c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5823ff000 CR3: 0000000030b95000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_claim_metadata+0x178/0x4c0 fs/ocfs2/suballoc.c:2082
 ocfs2_dx_dir_attach_index+0x1c1/0xd90 fs/ocfs2/dir.c:2333
 ocfs2_expand_inline_dir fs/ocfs2/dir.c:3025 [inline]
 ocfs2_extend_dir+0x3994/0x4870 fs/ocfs2/dir.c:3207
 ocfs2_prepare_dir_for_insert+0x2fe8/0x5450 fs/ocfs2/dir.c:4312
 ocfs2_link+0x95a/0x18a0 fs/ocfs2/namei.c:760
 vfs_link+0x4ea/0x6e0 fs/namei.c:4854
 do_linkat+0x272/0x560 fs/namei.c:4924
 __do_sys_link fs/namei.c:4958 [inline]
 __se_sys_link fs/namei.c:4956 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:4956
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe58d58eba9
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:00007fe58e338038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fe58d7d6090 RCX: 00007fe58d58eba9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 00002000000001c0
RBP: 00007fe58d611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe58d7d6128 R14: 00007fe58d7d6090 R15: 00007fffebc3e518
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1443 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x243c/0x2450 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 75 d4 16 fe 90 0f 0b e8 6d d4 16 fe 90 0f 0b e8 65 d4 16 fe 90 0f 0b e8 5d d4 16 fe 90 0f 0b e8 55 d4 16 fe 90 <0f> 0b e8 4d d4 16 fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000d356620 EFLAGS: 00010287
RAX: ffffffff83a8fa5b RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000ede1000 RSI: 0000000000003213 RDI: 0000000000003214
RBP: ffffc9000d3568b0 R08: ffffc9000d356920 R09: 0000000000000000
R10: ffffc9000d356920 R11: fffff52001a6ad29 R12: ffff88805255aa08
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100a4ab541
FS:  00007fe58e3386c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5899f4fc8 CR3: 0000000030b95000 CR4: 0000000000352ef0