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:900!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5321 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_reserve_suballoc_bits+0x40b5/0x4840 fs/ocfs2/suballoc.c:900
Code: 24 78 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 9d da ff ff 48 89 df e8 66 0d 65 fe e9 90 da ff ff e8 bc 40 f8 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 3a dc ff ff 4c 89 f7
RSP: 0018:ffffc9000de166e0 EFLAGS: 00010283
RAX: ffffffff83cd9344 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc9000ef72000 RSI: 00000000000008cd RDI: 00000000000008ce
RBP: ffffc9000de16bb0 R08: ffffffff9030f0f7 R09: 1ffffffff2061e1e
R10: dffffc0000000000 R11: fffffbfff2061e1f R12: ffff8880471c5c60
R13: ffff88801241ee00 R14: dffffc0000000000 R15: fffff52001bc2d08
FS:  00007f09fdc046c0(0000) GS:ffff88808c87e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdaf1e0c000 CR3: 0000000036e2a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1228 [inline]
 ocfs2_reserve_clusters_with_limit+0x3bc/0xc20 fs/ocfs2/suballoc.c:1273
 ocfs2_lock_refcount_allocators+0x6b6/0x9c0 fs/ocfs2/refcounttree.c:2871
 ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3183 [inline]
 ocfs2_replace_cow+0x5de/0x1c90 fs/ocfs2/refcounttree.c:3346
 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3424 [inline]
 ocfs2_refcount_cow+0x790/0xd40 fs/ocfs2/refcounttree.c:3467
 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2347 [inline]
 ocfs2_file_write_iter+0xee2/0x1e70 fs/ocfs2/file.c:2458
 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1228
 vfs_copy_file_range+0xb02/0x1370 fs/read_write.c:1634
 __do_sys_copy_file_range fs/read_write.c:1683 [inline]
 __se_sys_copy_file_range+0x2fb/0x480 fs/read_write.c:1650
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09fcd9ce59
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:00007f09fdc03fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f09fd015fa0 RCX: 00007f09fcd9ce59
RDX: 0000000000000009 RSI: 00002000000001c0 RDI: 000000000000000a
RBP: 00007f09fce32d6f R08: ffffffffa003e45b R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09fd016038 R14: 00007f09fd015fa0 R15: 00007fff1a79bb98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_reserve_suballoc_bits+0x40b5/0x4840 fs/ocfs2/suballoc.c:900
Code: 24 78 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 9d da ff ff 48 89 df e8 66 0d 65 fe e9 90 da ff ff e8 bc 40 f8 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 3a dc ff ff 4c 89 f7
RSP: 0018:ffffc9000de166e0 EFLAGS: 00010283
RAX: ffffffff83cd9344 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc9000ef72000 RSI: 00000000000008cd RDI: 00000000000008ce
RBP: ffffc9000de16bb0 R08: ffffffff9030f0f7 R09: 1ffffffff2061e1e
R10: dffffc0000000000 R11: fffffbfff2061e1f R12: ffff8880471c5c60
R13: ffff88801241ee00 R14: dffffc0000000000 R15: fffff52001bc2d08
FS:  00007f09fdc046c0(0000) GS:ffff88808c87e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdaf1e0c000 CR3: 0000000036e2a000 CR4: 0000000000352ef0