diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 20aa390..28d2aa1 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3454,7 +3454,9 @@
 	}
 
 	for (i = 0; i < IEEE80211_NUM_BANDS; i++)
-		request->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1;
+		if (wiphy->bands[i])
+			request->rates[i] =
+				(1 << wiphy->bands[i]->n_bitrates) - 1;
 
 	if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
 		nla_for_each_nested(attr,
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 1e7ff94..2936cb8 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -863,7 +863,8 @@
 	}
 
 	for (i = 0; i < IEEE80211_NUM_BANDS; i++)
-		creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1;
+		if (wiphy->bands[i])
+			creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1;
 
 	rdev->scan_req = creq;
 	err = rdev->ops->scan(wiphy, dev, creq);
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;