Q: Given the following code slice:
```
1 struct property *of_find_property(const struct device_node *np,
2 				  const char *name,
3 				  int *lenp)
4 {
5 	struct property *pp;
6 	unsigned long flags;
7 
8 	raw_spin_lock_irqsave(&devtree_lock, flags);
9 	pp = __of_find_property(np, name, lenp);
10 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
11 
12 	return pp;
13 }
14 struct device_node *of_node_get(struct device_node *node)
15 {
16 	if (node)
17 		kobject_get(&node->kobj);
18 	return node;
19 }
20 sub WARN {
21 	my ($type, $msg) = @_;
22 
23 	if (report("WARNING", $type, $msg)) {
24 		our $clean = 0;
25 		our $cnt_warn++;
26 		return 1;
27 	}
28 	return 0;
29 }
30 static inline bool of_have_populated_dt(void)
31 {
32 	return of_root != NULL;
33 }
34 static inline void kref_get(struct kref *kref)
35 {
36 	refcount_inc(&kref->refcount);
37 }
38 int pinctrl_dt_to_map(struct pinctrl *p, struct pinctrl_dev *pctldev)
39 {
40 	struct device_node *np = p->dev->of_node;
41 	int state, ret;
42 	char *propname;
43 	struct property *prop;
44 	const char *statename;
45 	const __be32 *list;
46 	int size, config;
47 	phandle phandle;
48 	struct device_node *np_config;
49 
50 	/* CONFIG_OF enabled, p->dev not instantiated from DT */
51 	if (!np) {
52 		if (of_have_populated_dt())
53 			dev_dbg(p->dev,
54 				"no of_node; not parsing pinctrl DT\n");
55 		return 0;
56 	}
57 
58 	/* We may store pointers to property names within the node */
59 	of_node_get(np);
60 
61 	/* For each defined state ID */
62 	for (state = 0; ; state++) {
63 		/* Retrieve the pinctrl-* property */
64 		propname = kasprintf(GFP_KERNEL, "pinctrl-%d", state);
65 		if (!propname)
66 			return -ENOMEM;
67 		prop = of_find_property(np, propname, &size);
68 		kfree(propname);
69 		if (!prop) {
70 			if (state == 0) {
71 				of_node_put(np);
72 				return -ENODEV;
73 			}
74 			break;
75 		}
76 		list = prop->value;
77 		size /= sizeof(*list);
78 
79 		/* Determine whether pinctrl-names property names the state */
80 		ret = of_property_read_string_index(np, "pinctrl-names",
81 						    state, &statename);
82 		/*
83 		 * If not, statename is just the integer state ID. But rather
84 		 * than dynamically allocate it and have to free it later,
85 		 * just point part way into the property name for the string.
86 		 */
87 		if (ret < 0)
88 			statename = prop->name + strlen("pinctrl-");
89 
90 		/* For every referenced pin configuration node in it */
91 		for (config = 0; config < size; config++) {
92 			phandle = be32_to_cpup(list++);
93 
94 			/* Look up the pin configuration node */
95 			np_config = of_find_node_by_phandle(phandle);
96 			if (!np_config) {
97 				dev_err(p->dev,
98 					"prop %s index %i invalid phandle\n",
99 					prop->name, config);
100 				ret = -EINVAL;
101 				goto err;
102 			}
103 
104 			/* Parse the node */
105 			ret = dt_to_map_one_config(p, pctldev, statename,
106 						   np_config);
107 			of_node_put(np_config);
108 			if (ret < 0)
109 				goto err;
110 		}
111 
112 		/* No entries in DT? Generate a dummy state table entry */
113 		if (!size) {
114 			ret = dt_remember_dummy_state(p, statename);
115 			if (ret < 0)
116 				goto err;
117 		}
118 	}
119 
120 	return 0;
121 
122 err:
123 	pinctrl_dt_free_maps(p);
124 	return ret;
125 }
126 static inline const char *kobject_name(const struct kobject *kobj)
127 {
128 	return kobj->name;
129 }
130 static struct property *__of_find_property(const struct device_node *np,
131 					   const char *name, int *lenp)
132 {
133 	struct property *pp;
134 
135 	if (!np)
136 		return NULL;
137 
138 	for (pp = np->properties; pp; pp = pp->next) {
139 		if (of_prop_cmp(pp->name, name) == 0) {
140 			if (lenp)
141 				*lenp = pp->length;
142 			break;
143 		}
144 	}
145 
146 	return pp;
147 }
148 struct kobject *kobject_get(struct kobject *kobj)
149 {
150 	if (kobj) {
151 		if (!kobj->state_initialized)
152 			WARN(1, KERN_WARNING
153 				"kobject: '%s' (%p): is not initialized, yet kobject_get() is being called.\n",
154 			     kobject_name(kobj), kobj);
155 		kref_get(&kobj->kref);
156 	}
157 	return kobj;
158 }
159 struct property *of_find_property(const struct device_node *np,
160 				  const char *name,
161 				  int *lenp)
162 {
163 	struct property *pp;
164 	unsigned long flags;
165 
166 	raw_spin_lock_irqsave(&devtree_lock, flags);
167 	pp = __of_find_property(np, name, lenp);
168 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
169 
170 	return pp;
171 }
```
which has a CWE-476 vulnerability at line:
```
9 	pp = __of_find_property(np, name, lenp);
```
Please generate five possible patches for the vulnerability.