diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index e7984f025bc7..64f191244c67 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3876,8 +3876,7 @@ static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
 	if (n_entries > wiphy->max_acl_mac_addrs)
 		return ERR_PTR(-ENOTSUPP);
 
-	acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
-		      GFP_KERNEL);
+	acl = kzalloc(struct_size(acl, mac_addrs, n_entries), GFP_KERNEL);
 	if (!acl)
 		return ERR_PTR(-ENOMEM);
 
@@ -6916,7 +6915,7 @@ static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
 	struct nlattr *nl_reg_rule;
 	char *alpha2;
 	int rem_reg_rules, r;
-	u32 num_rules = 0, rule_idx = 0, size_of_regd;
+	u32 num_rules = 0, rule_idx = 0;
 	enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
 	struct ieee80211_regdomain *rd;
 
@@ -6941,10 +6940,7 @@ static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
 	if (!reg_is_valid_request(alpha2))
 		return -EINVAL;
 
-	size_of_regd = sizeof(struct ieee80211_regdomain) +
-		       num_rules * sizeof(struct ieee80211_reg_rule);
-
-	rd = kzalloc(size_of_regd, GFP_KERNEL);
+	rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
 	if (!rd)
 		return -ENOMEM;