dccp: fix memory leak during tear-down of unsuccessful connection request

commit 72ef9c4125c7b257e3a714d62d778ab46583d6a3 upstream.

This patch fixes a memory leak, which happens if the connection request
is not fulfilled between parsing the DCCP options and handling the SYN
(because e.g. the backlog is full), because we forgot to free the
list of ack vectors.

Reported-by: Jianwen Ji <jiji@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index f053198e730c48c7ea8114706c3d4904228f41fb..5e3a7302f7747e4c4f3134eacab2f2c65b13402f 100644 (file)
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -749,6 +749,7 @@ static void ccid2_hc_tx_exit(struct sock *sk)
        for (i = 0; i < hc->tx_seqbufc; i++)
                kfree(hc->tx_seqbuf[i]);
        hc->tx_seqbufc = 0;
+       dccp_ackvec_parsed_cleanup(&hc->tx_av_chunks);
 }
 
 static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)