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.
=======================================================
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1679!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5314 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 04/01/2014
RIP: 0010:ocfs2_block_group_search+0x367/0x490 fs/ocfs2/suballoc.c:1679
Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c c5 fe ff ff 48 89 df e8 bc 1c 6c fe e9 b8 fe ff ff e8 d2 1e 01 fe 90 0f 0b e8 ca 1e 01 fe 90 <0f> 0b 65 44 8b 3d a3 8d 55 0f bf 07 00 00 00 44 89 fe e8 f2 22 01
RSP: 0018:ffffc9000360ef98 EFLAGS: 00010283
RAX: ffffffff83c33286 RBX: 000000000000004a RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 000000000000125d RDI: 000000000000125e
RBP: 0000000000000001 R08: 00000000ffffffff R09: ffffc9000360f580
R10: dffffc0000000000 R11: ffffffff83c32f20 R12: ffff88804730b658
R13: ffff88804735d580 R14: ffff888023e04000 R15: 000000000000004a
FS:  00007fc10a5f56c0(0000) GS:ffff88808ca94000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2bd962a000 CR3: 00000000128a9000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_search_chain+0x5d3/0x1dc0 fs/ocfs2/suballoc.c:1906
 ocfs2_claim_suballoc_bits+0x901/0x1f20 fs/ocfs2/suballoc.c:2088
 ocfs2_claim_new_inode+0x333/0x7c0 fs/ocfs2/suballoc.c:2386
 ocfs2_mknod_locked+0x10e/0x290 fs/ocfs2/namei.c:638
 ocfs2_mknod+0x1198/0x2210 fs/ocfs2/namei.c:385
 ocfs2_mkdir+0x181/0x430 fs/ocfs2/namei.c:660
 vfs_mkdir+0x413/0x630 fs/namei.c:5233
 filename_mkdirat+0x285/0x510 fs/namei.c:5266
 __do_sys_mkdir fs/namei.c:5293 [inline]
 __se_sys_mkdir+0x34/0x150 fs/namei.c:5290
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc10e19bf79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc10a5f5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fc10e415fa0 RCX: 00007fc10e19bf79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007fc10e2327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc10e416038 R14: 00007fc10e415fa0 R15: 00007fffbc0d9b78
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_block_group_search+0x367/0x490 fs/ocfs2/suballoc.c:1679
Code: d9 80 e1 07 80 c1 03 38 c1 0f 8c c5 fe ff ff 48 89 df e8 bc 1c 6c fe e9 b8 fe ff ff e8 d2 1e 01 fe 90 0f 0b e8 ca 1e 01 fe 90 <0f> 0b 65 44 8b 3d a3 8d 55 0f bf 07 00 00 00 44 89 fe e8 f2 22 01
RSP: 0018:ffffc9000360ef98 EFLAGS: 00010283
RAX: ffffffff83c33286 RBX: 000000000000004a RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 000000000000125d RDI: 000000000000125e
RBP: 0000000000000001 R08: 00000000ffffffff R09: ffffc9000360f580
R10: dffffc0000000000 R11: ffffffff83c32f20 R12: ffff88804730b658
R13: ffff88804735d580 R14: ffff888023e04000 R15: 000000000000004a
FS:  00007fc10a5f56c0(0000) GS:ffff88808ca94000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc10203f000 CR3: 00000000128a9000 CR4: 0000000000352ef0