diff --git a/net/wireless/util.c b/net/wireless/util.c
index a329429..be75a3a 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1013,6 +1013,9 @@
 {
 	int i, j;
 
+	if (!sband)
+		return -EINVAL;
+
 	if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
 		return -EINVAL;