[NETFILTER]: convert nfmark and conntrack mark to 32bit

As discussed at netconf'05, we convert nfmark and conntrack-mark to be
32bits even on 64bit architectures.

Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/ipv4/netfilter/ipt_connmark.c b/net/ipv4/netfilter/ipt_connmark.c
index 2706f96cea5..bf8de47ce00 100644
--- a/net/ipv4/netfilter/ipt_connmark.c
+++ b/net/ipv4/netfilter/ipt_connmark.c
@@ -54,9 +54,16 @@ checkentry(const char *tablename,
            unsigned int matchsize,
            unsigned int hook_mask)
 {
+        struct ipt_connmark_info *cm = 
+                                (struct ipt_connmark_info *)matchinfo;
         if (matchsize != IPT_ALIGN(sizeof(struct ipt_connmark_info)))
                 return 0;
 
+        if (cm->mark > 0xffffffff || cm->mask > 0xffffffff) {
+                printk(KERN_WARNING "connmark: only support 32bit mark\n");
+                return 0;
+        }
+
         return 1;
 }