From: Boris Ostrovsky <boris.ostrovsky@amd.com>
Date: Mon, 4 Apr 2011 20:07:26 +0000 (-0700)
Subject: ipv6: Don't pass invalid dst_entry pointer to dst_release().
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=738faca34335cd1d5d87fa7c58703139c7fa15bd;p=openwrt%2Fstaging%2Fblogic.git

ipv6: Don't pass invalid dst_entry pointer to dst_release().

Make sure dst_release() is not called with error pointer. This is
similar to commit 4910ac6c526d2868adcb5893e0c428473de862b5 ("ipv4:
Don't ip_rt_put() an error pointer in RAW sockets.").

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 2b0c186862c8..56fa12538d45 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -503,6 +503,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 	dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
 	if (IS_ERR(dst)) {
 		err = PTR_ERR(dst);
+		dst = NULL;
 		goto done;
 	}
 	skb = tcp_make_synack(sk, dst, req, rvp);