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.
overlayfs: failed to resolve './file0': -2
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1443!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5338 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+0x241f/0x2430 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 a2 10 11 fe 90 0f 0b e8 9a 10 11 fe 90 0f 0b e8 92 10 11 fe 90 0f 0b e8 8a 10 11 fe 90 0f 0b e8 82 10 11 fe 90 <0f> 0b e8 7a 10 11 fe 90 0f 0b 0f 1f 80 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000d51eb20 EFLAGS: 00010283
RAX: ffffffff83b0497e RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000f059000 RSI: 0000000000000422 RDI: 0000000000000423
RBP: ffffc9000d51edb0 R08: ffffc9000d51ee40 R09: 0000000000000003
R10: 0000000000000005 R11: 0000000000000002 R12: ffff888042942508
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff110085284a1
FS:  00007f8686e286c0(0000) GS:ffff88808d68a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb84f97000 CR3: 000000001276f000 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+0xe71/0x45b0 fs/ocfs2/suballoc.c:834
 ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984
 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1027 [inline]
 ocfs2_lock_allocators+0x29e/0x5c0 fs/ocfs2/suballoc.c:2761
 ocfs2_extend_allocation+0x39b/0x1760 fs/ocfs2/file.c:589
 ocfs2_allocate_unwritten_extents+0x2e9/0x7b0 fs/ocfs2/file.c:1496
 __ocfs2_change_file_space+0x901/0xe80 fs/ocfs2/file.c:2023
 ocfs2_fallocate+0x1f5/0x240 fs/ocfs2/file.c:2138
 vfs_fallocate+0x669/0x7e0 fs/open.c:339
 ksys_fallocate fs/open.c:363 [inline]
 __do_sys_fallocate fs/open.c:368 [inline]
 __se_sys_fallocate fs/open.c:366 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:366
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8685f8f7c9
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:00007f8686e28038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f86861e5fa0 RCX: 00007f8685f8f7c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f8686013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000001000f4 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f86861e6038 R14: 00007f86861e5fa0 R15: 00007ffd32826b58
 </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+0x241f/0x2430 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 a2 10 11 fe 90 0f 0b e8 9a 10 11 fe 90 0f 0b e8 92 10 11 fe 90 0f 0b e8 8a 10 11 fe 90 0f 0b e8 82 10 11 fe 90 <0f> 0b e8 7a 10 11 fe 90 0f 0b 0f 1f 80 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000d51eb20 EFLAGS: 00010283
RAX: ffffffff83b0497e RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000f059000 RSI: 0000000000000422 RDI: 0000000000000423
RBP: ffffc9000d51edb0 R08: ffffc9000d51ee40 R09: 0000000000000003
R10: 0000000000000005 R11: 0000000000000002 R12: ffff888042942508
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff110085284a1
FS:  00007f8686e286c0(0000) GS:ffff88808d68a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000000ac CR3: 000000001276f000 CR4: 0000000000352ef0