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authorEric Dumazet <edumazet@google.com>2013-04-24 18:34:55 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-19 10:54:43 -0700
commit8e1546d7e14ef043ff74070cea0aff55ba2f600c (patch)
treec595d2a41d374eb4d57366553cd3f628583d6697 /include
parent1203d9c66e6b892bd8043eea51c5cd510d097266 (diff)
tcp: force a dst refcount when prequeue packet
[ Upstream commit 093162553c33e9479283e107b4431378271c735d ] Before escaping RCU protected section and adding packet into prequeue, make sure the dst is refcounted. Reported-by: Mike Galbraith <bitbucket@online.de> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/net/tcp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 2757a115514..8376a6a5df4 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -948,6 +948,7 @@ static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
if (sysctl_tcp_low_latency || !tp->ucopy.task)
return 0;
+ skb_dst_force(skb);
__skb_queue_tail(&tp->ucopy.prequeue, skb);
tp->ucopy.memory += skb->truesize;
if (tp->ucopy.memory > sk->sk_rcvbuf) {