ipv6: ip6_make_skb() needs to clear cork.base.dst

From: Eric Dumazet <[email protected]>

In my last patch, I missed fact that cork.base.dst was not initialized in ip6_make_skb() :

If ip6_setup_cork() returns an error, we might attempt a dst_release() on some random pointer.

---
 net/ipv6/ip6_output.c |    1 +

 1 file changed, 1 insertion(+)

index 688ba5f7516b37c87b879036dce781bdcfa01739..78a774e7af12b5725577fb4aa3c917af2e171a8d 100644
@@ -1733,6 +1733,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
 	cork.base.flags = 0;
 	cork.base.addr = 0;
 	cork.base.opt = NULL;
+	cork.base.dst = NULL;
 	v6_cork.opt = NULL;
 	err = ip6_setup_cork(sk, &cork, &v6_cork, ipc6, rt, fl6);
 	if (err) {

From: Eric Dumazet <[email protected]>
Date: Thu, 11 Jan 2018 22:31:18 -0800

Applied and queued up for -stable, thanks Eric.