ipv6-multicast: Fix memory leak in IPv6 multicast.

If reg_vif_xmit cannot find a routing entry, be sure to free the skb before returning the error. Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: David S. Miller <davem@davemloft.net>

Author: greearb

net/ipv6/ip6mr.c

@@ -696,8 +696,10 @@ static netdev_tx_t reg_vif_xmit(struct sk_buff *skb,
 int err;
 
 err = ip6mr_fib_lookup(net, &fl6, &mrt);
-if (err < 0)
+if (err < 0) {
+kfree_skb(skb);
 return err;
+}
 
 read_lock(&mrt_lock);
 dev->stats.tx_bytes += skb->len;