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:875!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5316 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+0x40cb/0x4940 fs/ocfs2/suballoc.c:875
Code: 24 70 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c af da ff ff 48 89 df e8 d0 d8 67 fe e9 a2 da ff ff e8 46 3e fc fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 42 dc ff ff 4c 89 f7
RSP: 0018:ffffc9000e40dca0 EFLAGS: 00010287
RAX: ffffffff83c9593a RBX: 0000000000000001 RCX: 0000000000100000
RDX: ffffc9000ec62000 RSI: 00000000000923b0 RDI: 00000000000923b1
RBP: ffffc9000e40e170 R08: ffffffff901190b7 R09: 1ffffffff2023216
R10: dffffc0000000000 R11: fffffbfff2023217 R12: ffff888047f55df8
R13: ffff888057b12e00 R14: dffffc0000000000 R15: fffff52001c81bc0
FS:  00007f637b5206c0(0000) GS:ffff88808ca5e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558e1e852e00 CR3: 000000001f1bc000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_reserve_cluster_bitmap_bits+0xc4/0x1d0 fs/ocfs2/suballoc.c:1203
 ocfs2_local_alloc_reserve_for_window fs/ocfs2/localalloc.c:1106 [inline]
 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1242 [inline]
 ocfs2_reserve_local_alloc_bits+0x8c1/0x26f0 fs/ocfs2/localalloc.c:669
 ocfs2_reserve_clusters_with_limit+0x1b9/0xc20 fs/ocfs2/suballoc.c:1237
 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1298 [inline]
 ocfs2_lock_allocators+0x2d8/0x600 fs/ocfs2/suballoc.c:3073
 ocfs2_write_begin_nolock+0x1b3b/0x41e0 fs/ocfs2/aops.c:1719
 ocfs2_dio_wr_get_block+0xbbf/0x1800 fs/ocfs2/aops.c:2214
 get_more_blocks fs/direct-io.c:648 [inline]
 do_direct_IO fs/direct-io.c:936 [inline]
 __blockdev_direct_IO+0x15d7/0x32f0 fs/direct-io.c:1243
 ocfs2_direct_IO+0x251/0x2c0 fs/ocfs2/aops.c:2441
 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4248
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4417
 ocfs2_file_write_iter+0x1663/0x1ed0 fs/ocfs2/file.c:2476
 iter_file_splice_write+0x99b/0x1100 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1230
 do_sendfile+0x535/0x7d0 fs/read_write.c:1372
 __do_sys_sendfile64 fs/read_write.c:1433 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419
 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: 0033:0x7f637a59c139
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:00007f637b520028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f637a815fa0 RCX: 00007f637a59c139
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f637a6327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f637a816038 R14: 00007f637a815fa0 R15: 00007ffffc380878
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_reserve_suballoc_bits+0x40cb/0x4940 fs/ocfs2/suballoc.c:875
Code: 24 70 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c af da ff ff 48 89 df e8 d0 d8 67 fe e9 a2 da ff ff e8 46 3e fc fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 42 dc ff ff 4c 89 f7
RSP: 0018:ffffc9000e40dca0 EFLAGS: 00010287
RAX: ffffffff83c9593a RBX: 0000000000000001 RCX: 0000000000100000
RDX: ffffc9000ec62000 RSI: 00000000000923b0 RDI: 00000000000923b1
RBP: ffffc9000e40e170 R08: ffffffff901190b7 R09: 1ffffffff2023216
R10: dffffc0000000000 R11: fffffbfff2023217 R12: ffff888047f55df8
R13: ffff888057b12e00 R14: dffffc0000000000 R15: fffff52001c81bc0
FS:  00007f637b5206c0(0000) GS:ffff88808ca5e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558e1e852e00 CR3: 000000001f1bc000 CR4: 0000000000352ef0