[lucid/fsl-imx51 CVE 10/12] x25: use limited socket backlog CVE-2010-4251

[Andy Whitcroft]

From: Zhu Yi <yi.zhu at intel.com>

BugLink: http://bugs.launchpad.net/bugs/807462

Make x25 adapt to the limited socket backlog change.

Cc: Andrew Hendry <andrew.hendry at gmail.com>
Signed-off-by: Zhu Yi <yi.zhu at intel.com>
Acked-by: Eric Dumazet <eric.dumazet at gmail.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 2499849ee8f513e795b9f2c19a42d6356e4943a4)

Signed-off-by: Paolo Pisati <paolo.pisati at canonical.com>
Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
Signed-off-by: Andy Whitcroft <apw at canonical.com>
---
 net/x25/x25_dev.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/x25/x25_dev.c b/net/x25/x25_dev.c
index 3e1efe5..a9da0dc 100644
--- a/net/x25/x25_dev.c
+++ b/net/x25/x25_dev.c
@@ -53,7 +53,7 @@ static int x25_receive_data(struct sk_buff *skb, struct x25_neigh *nb)
 		if (!sock_owned_by_user(sk)) {
 			queued = x25_process_rx_frame(sk, skb);
 		} else {
-			sk_add_backlog(sk, skb);
+			queued = !sk_add_backlog_limited(sk, skb);
 		}
 		bh_unlock_sock(sk);
 		sock_put(sk);
-- 
1.7.4.1