dst: Clone child entry in skb_dst_pop

We clone the child entry in skb_dst_pop before we call
skb_dst_drop(). Otherwise we might kill the child right
before we return it to the caller.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/net/dst.h b/include/net/dst.h
index 2a46cbaef92d..75b95df4afe7 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -345,7 +345,7 @@ static inline void skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
 
 static inline struct dst_entry *skb_dst_pop(struct sk_buff *skb)
 {
-        struct dst_entry *child = skb_dst(skb)->child;
+        struct dst_entry *child = dst_clone(skb_dst(skb)->child);
 
         skb_dst_drop(skb);
         return child;