[patch 43/54] IPSEC: Fix panic when using inter address familiy IPsec on loopback.

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Kazunori MIYAZAWA <kazunori@xxxxxxxxxxxx>

---
 net/ipv4/xfrm4_input.c       |    6 ++----
 net/ipv4/xfrm4_mode_tunnel.c |    2 ++
 net/ipv6/xfrm6_input.c       |    6 ++----
 net/ipv6/xfrm6_mode_tunnel.c |    1 +
 4 files changed, 7 insertions(+), 8 deletions(-)

--- linux-2.6.21.4.orig/net/ipv4/xfrm4_input.c
+++ linux-2.6.21.4/net/ipv4/xfrm4_input.c
@@ -138,10 +138,8 @@ int xfrm4_rcv_encap(struct sk_buff *skb,
 	nf_reset(skb);
 
 	if (decaps) {
-		if (!(skb->dev->flags&IFF_LOOPBACK)) {
-			dst_release(skb->dst);
-			skb->dst = NULL;
-		}
+		dst_release(skb->dst);
+		skb->dst = NULL;
 		netif_rx(skb);
 		return 0;
 	} else {
--- linux-2.6.21.4.orig/net/ipv4/xfrm4_mode_tunnel.c
+++ linux-2.6.21.4/net/ipv4/xfrm4_mode_tunnel.c
@@ -84,6 +84,8 @@ static int xfrm4_tunnel_output(struct xf
 	top_iph->saddr = x->props.saddr.a4;
 	top_iph->daddr = x->id.daddr.a4;
 
+	skb->protocol = htons(ETH_P_IP);
+
 	memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
 	return 0;
 }
--- linux-2.6.21.4.orig/net/ipv6/xfrm6_input.c
+++ linux-2.6.21.4/net/ipv6/xfrm6_input.c
@@ -104,10 +104,8 @@ int xfrm6_rcv_spi(struct sk_buff *skb, _
 	nf_reset(skb);
 
 	if (decaps) {
-		if (!(skb->dev->flags&IFF_LOOPBACK)) {
-			dst_release(skb->dst);
-			skb->dst = NULL;
-		}
+		dst_release(skb->dst);
+		skb->dst = NULL;
 		netif_rx(skb);
 		return -1;
 	} else {
--- linux-2.6.21.4.orig/net/ipv6/xfrm6_mode_tunnel.c
+++ linux-2.6.21.4/net/ipv6/xfrm6_mode_tunnel.c
@@ -80,6 +80,7 @@ static int xfrm6_tunnel_output(struct xf
 	top_iph->hop_limit = dst_metric(dst->child, RTAX_HOPLIMIT);
 	ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
 	ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
+	skb->protocol = htons(ETH_P_IPV6);
 	return 0;
 }
 

-- 
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