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:1443!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5341 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:ffffc9000d57f140 EFLAGS: 00010283
RAX: ffffffff83b0497e RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 0000000000001b5a RDI: 0000000000001b5b
RBP: ffffc9000d57f3d0 R08: ffffc9000d57f440 R09: 0000000000000000
R10: ffffc9000d57f440 R11: fffff52001aafe8d R12: ffff888019ecfd88
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff110033d9fb1
FS:  00007f4b705f56c0(0000) GS:ffff88808d68a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000003f37b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_claim_metadata+0x178/0x4c0 fs/ocfs2/suballoc.c:2082
 ocfs2_create_refcount_tree+0x53f/0x1240 fs/ocfs2/refcounttree.c:591
 ocfs2_reflink_remap_blocks+0x2ea/0x1930 fs/ocfs2/refcounttree.c:4646
 ocfs2_remap_file_range+0x4b7/0x730 fs/ocfs2/file.c:2740
 vfs_copy_file_range+0xd81/0x1370 fs/read_write.c:1598
 __do_sys_copy_file_range fs/read_write.c:1681 [inline]
 __se_sys_copy_file_range+0x2fb/0x470 fs/read_write.c:1648
 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: 0033:0x7f4b7418f7c9
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:00007f4b705f5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f4b743e5fa0 RCX: 00007f4b7418f7c9
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f4b74213f91 R08: ffffffffa003e45c R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b743e6038 R14: 00007f4b743e5fa0 R15: 00007fff0c58aec8
 </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:ffffc9000d57f140 EFLAGS: 00010283
RAX: ffffffff83b0497e RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 0000000000001b5a RDI: 0000000000001b5b
RBP: ffffc9000d57f3d0 R08: ffffc9000d57f440 R09: 0000000000000000
R10: ffffc9000d57f440 R11: fffff52001aafe8d R12: ffff888019ecfd88
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff110033d9fb1
FS:  00007f4b705f56c0(0000) GS:ffff88808d68a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f74d8e24420 CR3: 000000003f37b000 CR4: 0000000000352ef0