--- zzzz-none-000/linux-2.6.39.4/net/ipv4/gre.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/net/ipv4/gre.c	2021-11-10 13:38:18.000000000 +0000
@@ -9,6 +9,10 @@
  *	2 of the License, or (at your option) any later version.
  *
  */
+/*
+         Includes Intel Corporation's changes/modifications dated: 3/9/2014.
+         Changed/modified portions - Copyright © 2014, Intel Corporation
+*/
 
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -18,6 +22,7 @@
 #include <linux/netdevice.h>
 #include <linux/version.h>
 #include <linux/spinlock.h>
+#include <net/ip.h>
 #include <net/protocol.h>
 #include <net/gre.h>
 
@@ -96,28 +101,18 @@
 
 static void gre_err(struct sk_buff *skb, u32 info)
 {
-	const struct gre_protocol *proto;
-	u8 ver;
 
-	if (!pskb_may_pull(skb, 12))
-		goto drop;
+    const struct gre_protocol *proto;
+    const struct iphdr *iph = (const struct iphdr *)skb->data;
+    u8 ver = skb->data[(iph->ihl<<2) + 1]&0x7f;
 
-	ver = skb->data[1]&0x7f;
 	if (ver >= GREPROTO_MAX)
-		goto drop;
-
+        return; 
 	rcu_read_lock();
 	proto = rcu_dereference(gre_proto[ver]);
-	if (!proto || !proto->err_handler)
-		goto drop_unlock;
+    if (proto && proto->err_handler)
 	proto->err_handler(skb, info);
 	rcu_read_unlock();
-	return;
-
-drop_unlock:
-	rcu_read_unlock();
-drop:
-	kfree_skb(skb);
 }
 
 static const struct net_protocol net_gre_protocol = {