loop0: detected capacity change from 32768 to 64
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:806!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5340 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_reserve_suballoc_bits+0x3f38/0x4640 fs/ocfs2/suballoc.c:806
Code: 78 e9 23 f2 ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 82 dd ff ff 4c 89 f7 e8 33 b6 79 fe e9 75 dd ff ff e8 d9 88 12 fe 90 <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 3c df ff ff 4c 89 ff
RSP: 0018:ffffc9000d36ed40 EFLAGS: 00010283
RAX: ffffffff83ac0627 RBX: ffff88805459ce00 RCX: 0000000000100000
RDX: ffffc9000eacb000 RSI: 0000000000000a7e RDI: 0000000000000a7f
RBP: ffffc9000d36f210 R08: ffffffff8f5c0d37 R09: 1ffffffff1eb81a6
R10: dffffc0000000000 R11: fffffbfff1eb81a7 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888040c7cfb8 R15: 0000000000000001
FS:  00007f5a239c86c0(0000) GS:ffff88808d97e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005586a7aeddb0 CR3: 000000003f7dd000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline]
 ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 fs/ocfs2/suballoc.c:1179
 ocfs2_mknod+0xe32/0x2050 fs/ocfs2/namei.c:357
 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:676
 lookup_open fs/namei.c:3796 [inline]
 open_last_lookups fs/namei.c:3895 [inline]
 path_openat+0x14f1/0x3830 fs/namei.c:4131
 do_filp_open+0x1fa/0x410 fs/namei.c:4161
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1463
 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: 0033:0x7f5a22b8eec9
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:00007f5a239c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5a22de6090 RCX: 00007f5a22b8eec9
RDX: 000000000000275a RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f5a22c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a22de6128 R14: 00007f5a22de6090 R15: 00007ffe1d217ea8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_reserve_suballoc_bits+0x3f38/0x4640 fs/ocfs2/suballoc.c:806
Code: 78 e9 23 f2 ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 82 dd ff ff 4c 89 f7 e8 33 b6 79 fe e9 75 dd ff ff e8 d9 88 12 fe 90 <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 3c df ff ff 4c 89 ff
RSP: 0018:ffffc9000d36ed40 EFLAGS: 00010283
RAX: ffffffff83ac0627 RBX: ffff88805459ce00 RCX: 0000000000100000
RDX: ffffc9000eacb000 RSI: 0000000000000a7e RDI: 0000000000000a7f
RBP: ffffc9000d36f210 R08: ffffffff8f5c0d37 R09: 1ffffffff1eb81a6
R10: dffffc0000000000 R11: fffffbfff1eb81a7 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888040c7cfb8 R15: 0000000000000001
FS:  00007f5a239c86c0(0000) GS:ffff88808d97e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005586a7aeddb0 CR3: 000000003f7dd000 CR4: 0000000000352ef0