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: 22204 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xff/0x320
 __lock_acquire+0xae/0x2cf0
 lock_acquire+0x117/0x340
 _raw_spin_lock_irqsave+0xa7/0xf0
 ocfs2_mark_lockres_freeing+0x125/0x580
 ocfs2_dlm_shutdown+0x3a/0x240
 ocfs2_dismount_volume+0x452/0x8b0
 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+0xff/0x4f0
 do_syscall_64+0x2d0/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc093390af7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd0e8e3a68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc0933ee72f RCX: 00007fc093390af7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd0e8e3b20
RBP: 00007ffd0e8e3b20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd0e8e4bb0
R13: 00007fc0933ee72f R14: 00000000000f1fcc R15: 00007ffd0e8e4bf0
 </TASK>
ocfs2: Unmounting device (7,4) on (node local)
