tcp: avoid infinite loop in tcp_splice_read()

[pandora-kernel.git] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 9a7c01e..80a9a97 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -659,6 +659,12 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
                                ret = -EAGAIN;
                                break;
                        }
                                ret = -EAGAIN;
                                break;
                        }

+                       /* if __tcp_splice_read() got nothing while we have
+                        * an skb in receive queue, we do not want to loop.
+                        * This might happen with URG data.
+                        */
+                       if (!skb_queue_empty(&sk->sk_receive_queue))
+                               break;

                        sk_wait_data(sk, &timeo);
                        if (signal_pending(current)) {
                                ret = sock_intr_errno(timeo);
                        sk_wait_data(sk, &timeo);
                        if (signal_pending(current)) {
                                ret = sock_intr_errno(timeo);