diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 8d15715..318d467 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1106,7 +1106,15 @@
 	int ihl;
 	int id;
 
-	if (!pskb_may_pull(skb, sizeof(*iph)))
+	if (unlikely(skb_shinfo(skb)->gso_type &
+		     ~(SKB_GSO_TCPV4 |
+		       SKB_GSO_UDP |
+		       SKB_GSO_DODGY |
+		       SKB_GSO_TCP_ECN |
+		       0)))
+		goto out;
+
+	if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
 		goto out;
 
 	iph = skb->nh.iph;
@@ -1114,7 +1122,7 @@
 	if (ihl < sizeof(*iph))
 		goto out;
 
-	if (!pskb_may_pull(skb, ihl))
+	if (unlikely(!pskb_may_pull(skb, ihl)))
 		goto out;
 
 	skb->h.raw = __skb_pull(skb, ihl);
@@ -1125,7 +1133,7 @@
 
 	rcu_read_lock();
 	ops = rcu_dereference(inet_protos[proto]);
-	if (ops && ops->gso_segment)
+	if (likely(ops && ops->gso_segment))
 		segs = ops->gso_segment(skb, features);
 	rcu_read_unlock();
 
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 8044587..f6a2d92 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2170,8 +2170,19 @@
 
 	if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
 		/* Packet is from an untrusted source, reset gso_segs. */
-		int mss = skb_shinfo(skb)->gso_size;
+		int type = skb_shinfo(skb)->gso_type;
+		int mss;
 
+		if (unlikely(type &
+			     ~(SKB_GSO_TCPV4 |
+			       SKB_GSO_DODGY |
+			       SKB_GSO_TCP_ECN |
+			       SKB_GSO_TCPV6 |
+			       0) ||
+			     !(type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))))
+			goto out;
+
+		mss = skb_shinfo(skb)->gso_size;
 		skb_shinfo(skb)->gso_segs = (skb->len + mss - 1) / mss;
 
 		segs = NULL;