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.
=======================================================
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
------------[ cut here ]------------
kernel BUG at fs/ocfs2/buffer_head_io.c:45!
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_write_block+0x5ae/0x610 fs/ocfs2/buffer_head_io.c:45
Code: 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 09 27 86 fe 49 8b 3f 4c 89 ee 48 8b 14 24 e8 fa 6b 0f 00 eb 1f e8 73 a4 1e fe 90 <0f> 0b e8 6b a4 1e fe 90 0f 0b e8 63 a4 1e fe e9 f2 fa ff ff e8 59
RSP: 0018:ffffc9000d53ee80 EFLAGS: 00010287
RAX: ffffffff83a2b58d RBX: 1ffff11008579342 RCX: 0000000000100000
RDX: ffffc9000f18a000 RSI: 000000000000821c RDI: 000000000000821d
RBP: ffffc9000d53ef50 R08: ffffffff8f813077 R09: 1ffffffff1f0260e
R10: dffffc0000000000 R11: fffffbfff1f0260f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888042bc99f8 R15: 0000000000000001
FS:  00007f91127f56c0(0000) GS:ffff88808d68a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcebff909c0 CR3: 00000000424a0000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_update_disk_slot+0x6c6/0x9c0 fs/ocfs2/slot_map.c:197
 ocfs2_find_slot+0x65d/0xc10 fs/ocfs2/slot_map.c:482
 ocfs2_mount_volume fs/ocfs2/super.c:1749 [inline]
 ocfs2_fill_super+0x3ebc/0x63a0 fs/ocfs2/super.c:1083
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1699
 vfs_get_tree+0x92/0x2a0 fs/super.c:1759
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount+0x302/0xa10 fs/namespace.c:3712
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4201
 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: 0033:0x7f9116390f6a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f91127f4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f91127f4ef0 RCX: 00007f9116390f6a
RDX: 0000200000004440 RSI: 0000200000000040 RDI: 00007f91127f4eb0
RBP: 0000200000004440 R08: 00007f91127f4ef0 R09: 0000000000000cc0
R10: 0000000000000cc0 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f91127f4eb0 R14: 0000000000004439 R15: 00002000000001c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_write_block+0x5ae/0x610 fs/ocfs2/buffer_head_io.c:45
Code: 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 09 27 86 fe 49 8b 3f 4c 89 ee 48 8b 14 24 e8 fa 6b 0f 00 eb 1f e8 73 a4 1e fe 90 <0f> 0b e8 6b a4 1e fe 90 0f 0b e8 63 a4 1e fe e9 f2 fa ff ff e8 59
RSP: 0018:ffffc9000d53ee80 EFLAGS: 00010287
RAX: ffffffff83a2b58d RBX: 1ffff11008579342 RCX: 0000000000100000
RDX: ffffc9000f18a000 RSI: 000000000000821c RDI: 000000000000821d
RBP: ffffc9000d53ef50 R08: ffffffff8f813077 R09: 1ffffffff1f0260e
R10: dffffc0000000000 R11: fffffbfff1f0260f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888042bc99f8 R15: 0000000000000001
FS:  00007f91127f56c0(0000) GS:ffff88808d68a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcebff909c0 CR3: 00000000424a0000 CR4: 0000000000352ef0