ip_gre: Fix bug added to ipgre_tunnel_xmit().

We can remove the rt_gateway == 0 check but we shouldn't
remove the 'dst' initialization too.

Noticed by Eric Dumazet.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index fc213350a6ed..05f7419ed7c5 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -724,8 +724,10 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
                         goto tx_error;
                 }
 
-                if (skb->protocol == htons(ETH_P_IP))
+                if (skb->protocol == htons(ETH_P_IP)) {
                         rt = skb_rtable(skb);
+                        dst = rt->rt_gateway;
+                }
 #if IS_ENABLED(CONFIG_IPV6)
                 else if (skb->protocol == htons(ETH_P_IPV6)) {
                         struct neighbour *neigh = dst_get_neighbour_noref(skb_dst(skb));