linux-kernel - [126/156] tipc: use limited socket backlog

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Date:	Tue, 30 Mar 2010 15:42:40 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jon Maloy <jon.maloy@...csson.com>,
	Allan Stephens <allan.stephens@...driver.com>,
	Zhu Yi <yi.zhu@...el.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [126/156] tipc: use limited socket backlog

2.6.33-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Zhu Yi <yi.zhu@...el.com>

[ Upstream commit 53eecb1be5ae499d399d2923933937a9ea1a284f ]

Make tipc adapt to the limited socket backlog change.

Cc: Jon Maloy <jon.maloy@...csson.com>
Cc: Allan Stephens <allan.stephens@...driver.com>
Signed-off-by: Zhu Yi <yi.zhu@...el.com>
Acked-by: Eric Dumazet <eric.dumazet@...il.com>
Acked-by: Allan Stephens <allan.stephens@...driver.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 net/tipc/socket.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1322,8 +1322,10 @@ static u32 dispatch(struct tipc_port *tp
 	if (!sock_owned_by_user(sk)) {
 		res = filter_rcv(sk, buf);
 	} else {
-		sk_add_backlog(sk, buf);
-		res = TIPC_OK;
+		if (sk_add_backlog_limited(sk, buf))
+			res = TIPC_ERR_OVERLOAD;
+		else
+			res = TIPC_OK;
 	}
 	bh_unlock_sock(sk);
 


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