and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
------------[ 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: 5811 Comm: syz.0.15 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+0x5d2/0x640 fs/ocfs2/buffer_head_io.c:45
Code: 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 f5 65 89 fe 49 8b 3f 4c 89 ee 48 8b 14 24 e8 76 8d 0f 00 eb 1f e8 df 69 24 fe 90 <0f> 0b e8 d7 69 24 fe 90 0f 0b e8 cf 69 24 fe e9 ce fa ff ff e8 c5
RSP: 0018:ffffc90002a1eec0 EFLAGS: 00010293
RAX: ffffffff839b5361 RBX: 1ffff11008a6a399 RCX: ffff888032fe2440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002a1ef90 R08: ffffffff8fc3c937 R09: 1ffffffff1f87926
R10: dffffc0000000000 R11: fffffbfff1f87927 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888045351cb0 R15: 0000000000000001
FS:  00007f90dbab16c0(0000) GS:ffff88808d007000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0bdcc0b000 CR3: 000000003ee8f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_update_disk_slot+0x6c6/0x9c0 fs/ocfs2/slot_map.c:197
 ocfs2_find_slot+0x6bb/0xc30 fs/ocfs2/slot_map.c:482
 ocfs2_mount_volume fs/ocfs2/super.c:1749 [inline]
 ocfs2_fill_super+0x3edd/0x63c0 fs/ocfs2/super.c:1083
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
 vfs_get_tree+0x92/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 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: 0033:0x7f90dad7f69a
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:00007f90dbab0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f90dbab0ef0 RCX: 00007f90dad7f69a
RDX: 0000000020000280 RSI: 0000000020000040 RDI: 00007f90dbab0eb0
RBP: 0000000020000280 R08: 00007f90dbab0ef0 R09: 00000000000008c0
R10: 00000000000008c0 R11: 0000000000000246 R12: 0000000020000040
R13: 00007f90dbab0eb0 R14: 0000000000004444 R15: 0000000020000100
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_write_block+0x5d2/0x640 fs/ocfs2/buffer_head_io.c:45
Code: 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 f5 65 89 fe 49 8b 3f 4c 89 ee 48 8b 14 24 e8 76 8d 0f 00 eb 1f e8 df 69 24 fe 90 <0f> 0b e8 d7 69 24 fe 90 0f 0b e8 cf 69 24 fe e9 ce fa ff ff e8 c5
RSP: 0018:ffffc90002a1eec0 EFLAGS: 00010293
RAX: ffffffff839b5361 RBX: 1ffff11008a6a399 RCX: ffff888032fe2440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002a1ef90 R08: ffffffff8fc3c937 R09: 1ffffffff1f87926
R10: dffffc0000000000 R11: fffffbfff1f87927 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888045351cb0 R15: 0000000000000001
FS:  00007f90dbab16c0(0000) GS:ffff88808d007000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9e1a51d000 CR3: 000000003ee8f000 CR4: 0000000000352ef0