net: add a noref bit on skb dst

[safe/jmp/linux-2.6] / include / net / sock.h

diff --git a/include/net/sock.h b/include/net/sock.h
index aed16eb..5697caf 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -600,12 +600,15 @@ static inline int sk_stream_memory_free(struct sock *sk)
 /* OOB backlog add */
 static inline void __sk_add_backlog(struct sock *sk, struct sk_buff *skb)
 {
-       if (!sk->sk_backlog.tail) {
-               sk->sk_backlog.head = sk->sk_backlog.tail = skb;
-       } else {
+       /* dont let skb dst not refcounted, we are going to leave rcu lock */
+       skb_dst_force(skb);
+
+       if (!sk->sk_backlog.tail)
+               sk->sk_backlog.head = skb;
+       else
                sk->sk_backlog.tail->next = skb;
-               sk->sk_backlog.tail = skb;
-       }
+
+       sk->sk_backlog.tail = skb;
        skb->next = NULL;
 }