[NETFILTER]: Fix ip6_tables extension header bypass bug

[safe/jmp/linux-2.6] / net / ipv6 / netfilter / ip6t_ah.c

diff --git a/net/ipv6/netfilter/ip6t_ah.c b/net/ipv6/netfilter/ip6t_ah.c
index ec1b160..4648664 100644 (file)
--- a/net/ipv6/netfilter/ip6t_ah.c
+++ b/net/ipv6/netfilter/ip6t_ah.c
@@ -54,9 +54,14 @@ match(const struct sk_buff *skb,
        const struct ip6t_ah *ahinfo = matchinfo;
        unsigned int ptr;
        unsigned int hdrlen = 0;
+       int err;
 
-       if (ipv6_find_hdr(skb, &ptr, NEXTHDR_AUTH, NULL) < 0)
+       err = ipv6_find_hdr(skb, &ptr, NEXTHDR_AUTH, NULL);
+       if (err < 0) {
+               if (err != -ENOENT)
+                       *hotdrop = 1;
                return 0;
+       }
 
        ah = skb_header_pointer(skb, ptr, sizeof(_ah), &_ah);
        if (ah == NULL) {