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: 1 UID: 0 PID: 15591 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+0xe8/0x150
 assign_lock_key+0x133/0x150
 register_lock_class+0xcc/0x2e0
 __lock_acquire+0xad/0x2cf0
 lock_acquire+0x106/0x330
 _raw_spin_lock_irqsave+0x40/0x60
 ocfs2_mark_lockres_freeing+0x15c/0x600
 ocfs2_dlm_shutdown+0x3a/0x240
 ocfs2_dismount_volume+0x63e/0x8c0
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x2b7/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff98d39bf17
Code: a2 c7 05 7c 96 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd30129d48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007ff98d40471f RCX: 00007ff98d39bf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd30129e00
RBP: 00007ffd30129e00 R08: 00007ffd3012ae00 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3012ae90
R13: 00007ff98d40471f R14: 000000000007d06d R15: 00007ffd3012aed0
 </TASK>
ocfs2: Unmounting device (7,1) on (node 0)
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 1 UID: 0 PID: 15591 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
RIP: 0010:ocfs2_evict_inode+0x2447/0x42e0
Code: c1 ec 03 43 80 3c 2c 00 74 08 48 89 df e8 71 50 79 fe 4c 8b 2b 49 83 c6 70 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 4b 50 79 fe 4d 8b 36 48 c7 c7 00 66
RSP: 0018:ffffc900053e7320 EFLAGS: 00010202
RAX: 000000000000000e RBX: ffff8881b4bcd0c0 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900053e72a0
RBP: ffffc900053e7a50 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000a7ce54 R12: 1ffff11036979a18
R13: 0000000000000000 R14: 0000000000000070 R15: fffff52000a7ce74
FS:  00005555802da500(0000) GS:ffff8882a9924000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556899e237b8 CR3: 0000000029682000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 evict+0x61e/0xb10
 ocfs2_free_slot_info+0x79/0x260
 ocfs2_delete_osb+0x58/0x170
 ocfs2_dismount_volume+0x578/0x8c0
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x2b7/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff98d39bf17
Code: a2 c7 05 7c 96 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd30129d48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007ff98d40471f RCX: 00007ff98d39bf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd30129e00
RBP: 00007ffd30129e00 R08: 00007ffd3012ae00 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3012ae90
R13: 00007ff98d40471f R14: 000000000007d06d R15: 00007ffd3012aed0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_evict_inode+0x2447/0x42e0
Code: c1 ec 03 43 80 3c 2c 00 74 08 48 89 df e8 71 50 79 fe 4c 8b 2b 49 83 c6 70 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 4b 50 79 fe 4d 8b 36 48 c7 c7 00 66
RSP: 0018:ffffc900053e7320 EFLAGS: 00010202
RAX: 000000000000000e RBX: ffff8881b4bcd0c0 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900053e72a0
RBP: ffffc900053e7a50 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000a7ce54 R12: 1ffff11036979a18
R13: 0000000000000000 R14: 0000000000000070 R15: fffff52000a7ce74
FS:  00005555802da500(0000) GS:ffff8882a9924000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556899e237b8 CR3: 0000000029682000 CR4: 00000000000006f0
