[patch 2/6] [EBTABLES] Don't match tcp/udp source/destination port for IP fragments

[Greg KH]

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

------------------
From: Bart De Schuymer <bdschuym@xxxxxxxxxx>

Signed-off-by: Bart De Schuymer <bdschuym@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 net/bridge/netfilter/ebt_ip.c |    3 +++
 1 file changed, 3 insertions(+)

--- linux-2.6.14.6.orig/net/bridge/netfilter/ebt_ip.c
+++ linux-2.6.14.6/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
 		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)

--
-
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