loop4: detected capacity change from 0 to 32768
ocfs2: Readonly device (7,4) detected. Cluster services will not be used for this mount. Recovery will be skipped.
ocfs2: Mounting device (7,4) on (node local, slot 65535) with ordered data mode.
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 27471 Comm: syz.4.2489 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 assign_lock_key+0x133/0x150
 register_lock_class+0x105/0x320
 __lock_acquire+0x99/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock_irqsave+0xa7/0xf0
 ocfs2_mark_lockres_freeing+0x125/0x580
 ocfs2_dlm_shutdown+0x3a/0x240
 ocfs2_dismount_volume+0x46a/0x8d0
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc8a59034a
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:00007fbc8b492e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007fbc8b492ef0 RCX: 00007fbc8a59034a
RDX: 0000200000000840 RSI: 0000200000000040 RDI: 00007fbc8b492eb0
RBP: 0000200000000840 R08: 00007fbc8b492ef0 R09: 00000000000008c1
R10: 00000000000008c1 R11: 0000000000000246 R12: 0000200000000040
R13: 00007fbc8b492eb0 R14: 000000000000443a R15: 0000200000000880
 </TASK>
ocfs2: Unmounting device (7,4) on (node local)
