Messages in this thread Patch in this message | | | Date | Fri, 03 May 2013 21:02:08 -0400 | From | Steven Rostedt <> | Subject | [PATCH RT 1/4] tcp: force a dst refcount when prequeue packet |
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From: Eric Dumazet <edumazet@google.com>
Before escaping RCU protected section and adding packet into prequeue, make sure the dst is refcounted.
Cc: stable-rt@vger.kernel.org Reported-by: Mike Galbraith <bitbucket@online.de> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- include/net/tcp.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/net/tcp.h b/include/net/tcp.h index b28a49f..4881cb6 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -902,6 +902,7 @@ 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) { -- 1.7.10.4
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