1 files changed, 9 insertions, 2 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 132737a7c83a..a0fcc47fee73 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -985,6 +985,7 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
         struct flowi4 fl4;
         struct rtable *rt;
         struct dst_entry *dst;
+        bool new = false;
 
         bh_lock_sock(sk);
         rt = (struct rtable *) __sk_dst_get(sk);
@@ -1000,20 +1001,26 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
                 rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
                 if (IS_ERR(rt))
                         goto out;
+
+                new = true;
         }
 
         __ip_rt_update_pmtu((struct rtable *) rt->dst.path, &fl4, mtu);
 
         dst = dst_check(&rt->dst, 0);
         if (!dst) {
+                if (new)
+                        dst_release(&rt->dst);
+
                 rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
                 if (IS_ERR(rt))
                         goto out;
 
-                dst = &rt->dst;
+                new = true;
         }
 
-         __sk_dst_set(sk, dst);
+        if (new)
+                __sk_dst_set(sk, &rt->dst);
 
 out:
         bh_unlock_sock(sk);