linux-kernel - [31/68] tcp: Make TCP_MAXSEG minimum more correct.

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Message-Id: <20110228162408.842718328@clark.kroah.org>
Date:	Mon, 28 Feb 2011 08:22:52 -0800
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,
	"David S. Miller" <davem@...emloft.net>,
	Moritz Muehlenhoff <jmm@...ian.org>
Subject: [31/68] tcp: Make TCP_MAXSEG minimum more correct.

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

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

From: David S. Miller <davem@...emloft.net>

commit c39508d6f118308355468314ff414644115a07f3 upstream.

Use TCP_MIN_MSS instead of constant 64.

Reported-by: Min Zhang <mzhang@...sta.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Cc: Moritz Muehlenhoff <jmm@...ian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 net/ipv4/tcp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2117,7 +2117,7 @@ static int do_tcp_setsockopt(struct sock
 		/* Values greater than interface MTU won't take effect. However
 		 * at the point when this call is done we typically don't yet
 		 * know which interface is going to be used */
-		if (val < 64 || val > MAX_TCP_WINDOW) {
+		if (val < TCP_MIN_MSS || val > MAX_TCP_WINDOW) {
 			err = -EINVAL;
 			break;
 		}


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