From: Bart De Schuymer <bdschuym@pandora.be>
Date: Tue, 10 Jan 2006 21:12:22 +0000 (-0800)
Subject: [EBTABLES] Don't match tcp/udp source/destination port for IP fragments
X-Git-Tag: firefly_0821_release~39182^2
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=8a4c8a96a47c9e2f08156fd9664974df086eed50;p=firefly-linux-kernel-4.4.55.git

[EBTABLES] Don't match tcp/udp source/destination port for IP fragments

Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bridge/netfilter/ebt_ip.c b/net/bridge/netfilter/ebt_ip.c
index 7323805b9726..f158fe67dd60 100644
--- a/net/bridge/netfilter/ebt_ip.c
+++ b/net/bridge/netfilter/ebt_ip.c
@@ -15,6 +15,7 @@
 #include <linux/netfilter_bridge/ebtables.h>
 #include <linux/netfilter_bridge/ebt_ip.h>
 #include <linux/ip.h>
+#include <net/ip.h>
 #include <linux/in.h>
 #include <linux/module.h>
 
@@ -51,6 +52,8 @@ static int ebt_filter_ip(const struct sk_buff *skb, const struct net_device *in,
 		if (!(info->bitmask & EBT_IP_DPORT) &&
 		    !(info->bitmask & EBT_IP_SPORT))
 			return EBT_MATCH;
+		if (ntohs(ih->frag_off) & IP_OFFSET)
+			return EBT_NOMATCH;
 		pptr = skb_header_pointer(skb, ih->ihl*4,
 					  sizeof(_ports), &_ports);
 		if (pptr == NULL)