Q: Given the following code slice:
```
1 void thermal_debug_tz_remove(struct thermal_zone_device *tz)
2 {
3 	struct thermal_debugfs *thermal_dbg = tz->debugfs;
4 
5 	if (!thermal_dbg)
6 		return;
7 
8 	mutex_lock(&thermal_dbg->lock);
9 
10 	tz->debugfs = NULL;
11 
12 	mutex_unlock(&thermal_dbg->lock);
13 
14 	thermal_debugfs_remove_id(thermal_dbg);
15 }
```
which has a vulnerability among CWE-401 and among lines:
```
12 	mutex_unlock(&thermal_dbg->lock);
```
Please generate five possible patches for the vulnerability.