mac802154: rx: add error handling after skb_clone

This patch adds error handling after skb_clone and deliver only if
skb_clone was successful.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/mac802154/rx.c

@@ -240,13 +240,14 @@ ieee802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb)
 			continue;
 
 		skb2 = skb_clone(skb, GFP_ATOMIC);
+		if (skb2) {
 			skb2->dev = sdata->dev;
-
 			ieee802154_deliver_skb(skb2);
 
 			sdata->dev->stats.rx_packets++;
 			sdata->dev->stats.rx_bytes += skb->len;
 		}
+	}
 }
 
 void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb)