[PATCH 4/5] vti6: Fix dst_entry leek on pmtu discovery

[Steffen Klassert]

We may exit without releasing the dst_entry on pmtu discovery,
so don't return directly but goto the te error handling. This
also makes sure that the statistic counter gets updated.

Fixes: ccd740cbc6e0 ("vti6: Add pmtu handling to vti6_xmit.")
Reported-by: Mark McKinstry <mark.mckins...@alliedtelesis.co.nz>
Signed-off-by: Steffen Klassert <steffen.klass...@secunet.com>
---
 net/ipv6/ip6_vti.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 0a8610b..555ac2b 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -479,7 +479,8 @@ vti6_xmit(struct sk_buff *skb, struct net_device *dev, 
struct flowi *fl)
                        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
                                  htonl(mtu));
 
-               return -EMSGSIZE;
+               err = -EMSGSIZE;
+               goto tx_err_dst_release;
        }
 
        err = dst_output(t->net, skb->sk, skb);
-- 
1.9.1