[DCCP]: Check if already in the CLOSING state in dccp_rcv_closereq

It is possible to receive more than one CLOSEREQ packet if the
CLOSE packet sent in response is somehow lost, change the state
to DCCP_CLOSING only on the first CLOSEREQ packet received.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index c60bc3433f5e..f01d588299c8 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -50,7 +50,8 @@ static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb)
                 return;
         }
 
-        dccp_set_state(sk, DCCP_CLOSING);
+        if (sk->sk_state != DCCP_CLOSING)
+                dccp_set_state(sk, DCCP_CLOSING);
         dccp_send_close(sk, 0);
 }