[IPSEC]: Fix panic when using inter address familiy IPsec on loopback.

Signed-off-by: Kazunori MIYAZAWA <kazunori@miyazawa.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index d7ed8aa..c858537 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -104,10 +104,8 @@
 	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 {