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authorChristoph Paasch <christoph.paasch@gmail.com>2009-05-05 15:32:16 +0200
committerPatrick McHardy <kaber@trash.net>2009-05-05 15:32:16 +0200
commitb98b4947cb79d670fceca0e951c092eea93e9baa (patch)
tree4daddb336ddbab1e7ac7a6b10e68add36ab908ac
parenta7ca7fccacc029958fd09985e7f3529b90ec791d (diff)
downloadop-kernel-dev-b98b4947cb79d670fceca0e951c092eea93e9baa.zip
op-kernel-dev-b98b4947cb79d670fceca0e951c092eea93e9baa.tar.gz
netfilter: ip6t_ipv6header: fix match on packets ending with NEXTHDR_NONE
As packets ending with NEXTHDR_NONE don't have a last extension header, the check for the length needs to be after the check for NEXTHDR_NONE. Signed-off-by: Christoph Paasch <christoph.paasch@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
-rw-r--r--net/ipv6/netfilter/ip6t_ipv6header.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv6/netfilter/ip6t_ipv6header.c b/net/ipv6/netfilter/ip6t_ipv6header.c
index 14e6724..91490ad 100644
--- a/net/ipv6/netfilter/ip6t_ipv6header.c
+++ b/net/ipv6/netfilter/ip6t_ipv6header.c
@@ -50,14 +50,14 @@ ipv6header_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
struct ipv6_opt_hdr _hdr;
int hdrlen;
- /* Is there enough space for the next ext header? */
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return false;
/* No more exthdr -> evaluate */
if (nexthdr == NEXTHDR_NONE) {
temp |= MASK_NONE;
break;
}
+ /* Is there enough space for the next ext header? */
+ if (len < (int)sizeof(struct ipv6_opt_hdr))
+ return false;
/* ESP -> evaluate */
if (nexthdr == NEXTHDR_ESP) {
temp |= MASK_ESP;
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