loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
/dev/loop0: Can't open blockdev
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1443!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11743-g6bcdbd62bd56 #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 c5 9d 17 fe 90 0f 0b e8 bd 9d 17 fe 90 0f 0b e8 b5 9d 17 fe 90 0f 0b e8 ad 9d 17 fe 90 0f 0b e8 a5 9d 17 fe 90 <0f> 0b e8 9d 9d 17 fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000d445be0 EFLAGS: 00010287
RAX: ffffffff83a81dbb RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000e3d2000 RSI: 00000000000014dc RDI: 00000000000014dd
RBP: ffffc9000d445e70 R08: ffffc9000d445f00 R09: 0000000000000003
R10: 0000000000000005 R11: 0000000000000002 R12: ffff888052442d08
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100a4885a1
FS:  00007f3481c0a6c0(0000) GS:ffff88808d218000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000101c CR3: 0000000043991000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __ocfs2_claim_clusters+0x303/0x8f0 fs/ocfs2/suballoc.c:2421
 ocfs2_claim_clusters fs/ocfs2/suballoc.c:2458 [inline]
 ocfs2_block_group_alloc_contig fs/ocfs2/suballoc.c:432 [inline]
 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:699 [inline]
 ocfs2_reserve_suballoc_bits+0xf1e/0x4640 fs/ocfs2/suballoc.c:834
 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984
 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2845 [inline]
 ocfs2_extend_dir+0xc76/0x4870 fs/ocfs2/dir.c:3207
 ocfs2_prepare_dir_for_insert+0x2fe8/0x5450 fs/ocfs2/dir.c:4312
 ocfs2_rename+0x190a/0x3940 fs/ocfs2/namei.c:1481
 vfs_rename+0xbd7/0xf00 fs/namei.c:5129
 do_renameat2+0x6ce/0xa80 fs/namei.c:5278
 __do_sys_rename fs/namei.c:5325 [inline]
 __se_sys_rename fs/namei.c:5323 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5323
 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: 0033:0x7f3480d8ebe9
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:00007f3481c0a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f3480fb5fa0 RCX: 00007f3480d8ebe9
RDX: 0000000000000000 RSI: 0000200000000f40 RDI: 00002000000003c0
RBP: 00007f3480e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3480fb6038 R14: 00007f3480fb5fa0 R15: 00007fff28d5ec58
 </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 c5 9d 17 fe 90 0f 0b e8 bd 9d 17 fe 90 0f 0b e8 b5 9d 17 fe 90 0f 0b e8 ad 9d 17 fe 90 0f 0b e8 a5 9d 17 fe 90 <0f> 0b e8 9d 9d 17 fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000d445be0 EFLAGS: 00010287
RAX: ffffffff83a81dbb RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000e3d2000 RSI: 00000000000014dc RDI: 00000000000014dd
RBP: ffffc9000d445e70 R08: ffffc9000d445f00 R09: 0000000000000003
R10: 0000000000000005 R11: 0000000000000002 R12: ffff888052442d08
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100a4885a1
FS:  00007f3481c0a6c0(0000) GS:ffff88808d218000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3481be8fc8 CR3: 0000000043991000 CR4: 0000000000352ef0