netfilter: ip6t_REJECT: fix a dst leak in ipv6 REJECT

commit 499031ac8a3df6738f6186ded9da853e8ea18253 upstream.

We should release dst if dst->error is set.

Bug introduced in 2.6.14 by commit e104411b82f5c
([XFRM]: Always release dst_entry on error in xfrm_lookup)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 39b50c3768e8b5c22f293e72c465d4b2aeea2bf2..67e7110500697dbb125096a4bd12d7561de27e17 100644 (file)
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -96,9 +96,11 @@ static void send_reset(struct net *net, struct sk_buff *oldskb)
        fl.fl_ip_dport = otcph.source;
        security_skb_classify_flow(oldskb, &fl);
        dst = ip6_route_output(net, NULL, &fl);
-       if (dst == NULL)
+       if (dst == NULL || dst->error) {
+               dst_release(dst);
                return;
-       if (dst->error || xfrm_lookup(net, &dst, &fl, NULL, 0))
+       }
+       if (xfrm_lookup(net, &dst, &fl, NULL, 0))
                return;
 
        hh_len = (dst->dev->hard_header_len + 15)&~15;