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: 5791 Comm: syz.0.16 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 ab 86 fe 49 8b 3f 4c 89 ee 48 8b 14 24 e8 c6 8c 0f 00 eb 1f e8 ef 6c 1f fe 90 <0f> 0b e8 e7 6c 1f fe 90 0f 0b e8 df 6c 1f fe e9 ce fa ff ff e8 d5
RSP: 0018:ffffc90002826e80 EFLAGS: 00010293
RAX: ffffffff83a0a941 RBX: 1ffff1100818443d RCX: ffff888000b34900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002826f50 R08: ffffffff8f7cfc77 R09: 1ffffffff1ef9f8e
R10: dffffc0000000000 R11: fffffbfff1ef9f8f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888040c221d0 R15: 0000000000000001
FS:  00007f17019696c0(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b7fc0b5d8 CR3: 0000000031731000 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:1691
 vfs_get_tree+0x92/0x2b0 fs/super.c:1751
 fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount+0x302/0xa10 fs/namespace.c:3727
 do_mount fs/namespace.c:4050 [inline]
 __do_sys_mount fs/namespace.c:4238 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4215
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1700b9010a
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:00007f1701968e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1701968ef0 RCX: 00007f1700b9010a
RDX: 0000200000000000 RSI: 0000200000000040 RDI: 00007f1701968eb0
RBP: 0000200000000000 R08: 00007f1701968ef0 R09: 00000000000008c0
R10: 00000000000008c0 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f1701968eb0 R14: 000000000000445a R15: 00002000000002c0
 </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 ab 86 fe 49 8b 3f 4c 89 ee 48 8b 14 24 e8 c6 8c 0f 00 eb 1f e8 ef 6c 1f fe 90 <0f> 0b e8 e7 6c 1f fe 90 0f 0b e8 df 6c 1f fe e9 ce fa ff ff e8 d5
RSP: 0018:ffffc90002826e80 EFLAGS: 00010293
RAX: ffffffff83a0a941 RBX: 1ffff1100818443d RCX: ffff888000b34900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002826f50 R08: ffffffff8f7cfc77 R09: 1ffffffff1ef9f8e
R10: dffffc0000000000 R11: fffffbfff1ef9f8f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888040c221d0 R15: 0000000000000001
FS:  00007f17019696c0(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c07d3ba10 CR3: 0000000031731000 CR4: 0000000000352ef0