vxlan: fix flowi6_proto value

It should be IPPROTO_UDP.

Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 3ffb22d..0fcf3f7 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1671,7 +1671,7 @@
 		fl6.flowi6_oif = rdst->remote_ifindex;
 		fl6.daddr = dst->sin6.sin6_addr;
 		fl6.saddr = vxlan->saddr.sin6.sin6_addr;
-		fl6.flowi6_proto = skb->protocol;
+		fl6.flowi6_proto = IPPROTO_UDP;
 
 		if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) {
 			netdev_dbg(dev, "no route to %pI6\n",