diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index 045c5177262e..214fd1f819a1 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -187,6 +187,9 @@ static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_ty
 
 	len = skb->data[0] + skb->data[1] * 256 - 5;
 
+	if (len < 0 || len > skb->len - 2)
+		goto drop_unlock;
+
 	skb_pull(skb, 2);	/* Remove the length bytes */
 	skb_trim(skb, len);	/* Set the length of the data */