[IPV6]: skb leakage in inet6_csk_xmit

inet6_csk_xit does not free skb when routing fails.

Signed-off-by: Alexey Kuznetsov <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv6/inet6_connection_sock.c

···
 
 		if (err) {
 			sk->sk_err_soft = -err;
+			kfree_skb(skb);
 			return err;
 		}
 
···
 
 		if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
 			sk->sk_route_caps = 0;
+			kfree_skb(skb);
 			return err;
 		}