Q: Given the following code slice:
```
1 void hub_get(struct usb_hub *hub)
2 {
3 	kref_get(&hub->kref);
4 }
5 
6 static ssize_t disable_show(struct device *dev,
7 			      struct device_attribute *attr, char *buf)
8 {
9 	struct usb_port *port_dev = to_usb_port(dev);
10 	struct usb_device *hdev = to_usb_device(dev->parent->parent);
11 	struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
12 	struct usb_interface *intf = to_usb_interface(hub->intfdev);
13 	int port1 = port_dev->portnum;
14 	u16 portstatus, unused;
15 	bool disabled;
16 	int rc;
17 	struct kernfs_node *kn;
18 
19 	hub_get(hub);
20 	rc = usb_autopm_get_interface(intf);
21 	if (rc < 0)
22 		goto out_hub_get;
23 
24 	/*
25 	 * Prevent deadlock if another process is concurrently
26 	 * trying to unregister hdev.
27 	 */
28 	kn = sysfs_break_active_protection(&dev->kobj, &attr->attr);
29 	if (!kn) {
30 		rc = -ENODEV;
31 		goto out_autopm;
32 	}
33 	usb_lock_device(hdev);
34 	if (hub->disconnected) {
35 		rc = -ENODEV;
36 		goto out_hdev_lock;
37 	}
38 
39 	usb_hub_port_status(hub, port1, &portstatus, &unused);
40 	disabled = !usb_port_is_power_on(hub, portstatus);
41 
42  out_hdev_lock:
43 	usb_unlock_device(hdev);
44 	sysfs_unbreak_active_protection(kn);
45  out_autopm:
46 	usb_autopm_put_interface(intf);
47  out_hub_get:
48 	hub_put(hub);
49 
50 	if (rc)
51 		return rc;
52 
53 	return sysfs_emit(buf, "%s\n", disabled ? "1" : "0");
54 }
```
which has a vulnerability among CWE-416,CWE-476 and among lines:
```
3 	kref_get(&hub->kref);
19 	hub_get(hub);
20 	rc = usb_autopm_get_interface(intf);
33 	usb_lock_device(hdev);
43 	usb_unlock_device(hdev);
```
Please generate five possible patches for the vulnerability.