diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 6d5f3f737207..a649763b854d 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2321,6 +2321,9 @@ int regulatory_hint_user(const char *alpha2,
 	if (WARN_ON(!alpha2))
 		return -EINVAL;
 
+	if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
+		return -EINVAL;
+
 	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
 	if (!request)
 		return -ENOMEM;