linux-kernel - [PATCH] lro: IP fragment checking

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Message-ID: <4933A74F.3050809@de.ibm.com>
Date:	Mon, 01 Dec 2008 09:58:55 +0100
From:	Jan-Bernd Themann <ossthema@...ibm.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>, tklein@...ibm.com,
	Christoph Raisch <raisch@...ibm.com>, jb.billaud@...il.com,
	hering2@...ibm.com
Subject: [PATCH] lro: IP fragment checking

This patch prevents that ip fragmented TCP packets are considered vaild
for aggregation

Regards,

Jan-Bernd

---



 net/ipv4/inet_lro.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c
index cfd034a..1f9159d 100644
--- a/net/ipv4/inet_lro.c
+++ b/net/ipv4/inet_lro.c
@@ -64,6 +64,9 @@ static int lro_tcp_ip_check(struct iphdr *iph, struct tcphdr *tcph,
 	if (iph->ihl != IPH_LEN_WO_OPTIONS)
 		return -1;
 
+	if (iph->frag_off & IP_MF)
+		return -1;
+
 	if (tcph->cwr || tcph->ece || tcph->urg || !tcph->ack
 	    || tcph->rst || tcph->syn || tcph->fin)
 		return -1;
-- 
1.5.5





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