[IPV6]: Fix leak added by udp connect dst caching fix.

Based upon a patch from Mitsuru KANDA <mk@linux-ipv6.org>

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 4 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 6001948600f3..e4cad11f284a 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -852,10 +852,16 @@ do_append_data:
         else if (!corkreq)
                 err = udp_v6_push_pending_frames(sk, up);
 
-        if (dst && connected)
-                ip6_dst_store(sk, dst,
-                              ipv6_addr_equal(&fl->fl6_dst, &np->daddr) ?
-                              &np->daddr : NULL);
+        if (dst) {
+                if (connected) {
+                        ip6_dst_store(sk, dst,
+                                      ipv6_addr_equal(&fl->fl6_dst, &np->daddr) ?
+                                      &np->daddr : NULL);
+                } else {
+                        dst_release(dst);
+                }
+        }
+
         if (err > 0)
                 err = np->recverr ? net_xmit_errno(err) : 0;
         release_sock(sk);