Q: Given the following code slice:
```
1 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
2 {
3 	struct cfg80211_registered_device *rdev = info->user_ptr[0];
4 	const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
5 	struct cfg80211_coalesce new_coalesce = {};
6 	struct cfg80211_coalesce *n_coalesce;
7 	int err, rem_rule, n_rules = 0, i, j;
8 	struct nlattr *rule;
9 	struct cfg80211_coalesce_rules *tmp_rule;
10 
11 	if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
12 		return -EOPNOTSUPP;
13 
14 	if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
15 		cfg80211_rdev_free_coalesce(rdev);
16 		rdev_set_coalesce(rdev, NULL);
17 		return 0;
18 	}
19 
20 	nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
21 			    rem_rule)
22 		n_rules++;
23 	if (n_rules > coalesce->n_rules)
24 		return -EINVAL;
25 
26 	new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
27 				     GFP_KERNEL);
28 	if (!new_coalesce.rules)
29 		return -ENOMEM;
30 
31 	new_coalesce.n_rules = n_rules;
32 	i = 0;
33 
34 	nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
35 			    rem_rule) {
36 		err = nl80211_parse_coalesce_rule(rdev, rule,
37 						  &new_coalesce.rules[i]);
38 		if (err)
39 			goto error;
40 
41 		i++;
42 	}
43 
44 	err = rdev_set_coalesce(rdev, &new_coalesce);
45 	if (err)
46 		goto error;
47 
48 	n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
49 	if (!n_coalesce) {
50 		err = -ENOMEM;
51 		goto error;
52 	}
53 	cfg80211_rdev_free_coalesce(rdev);
54 	rdev->coalesce = n_coalesce;
55 
56 	return 0;
57 error:
58 	for (i = 0; i < new_coalesce.n_rules; i++) {
59 		tmp_rule = &new_coalesce.rules[i];
60 		for (j = 0; j < tmp_rule->n_patterns; j++)
61 			kfree(tmp_rule->patterns[j].mask);
62 		kfree(tmp_rule->patterns);
63 	}
64 	kfree(new_coalesce.rules);
65 
66 	return err;
67 }
```
which has a vulnerability among CWE-476 and among lines:
```
59 		tmp_rule = &new_coalesce.rules[i];
```
Please generate five possible patches for the vulnerability.