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[IPSEC]: Do not let packets pass when ICMP flag is off 

This fixes a logical error in ICMP policy checks which lets
packets through if the state ICMP flag is off.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2007-12-12 18:54:16 -08:00 committed by David S. Miller
parent bb72845e69
commit aebcf82c1f
2 changed files with 10 additions and 4 deletions
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7
net/ipv4/icmp.c
View File

@ -977,10 +977,13 @@ int icmp_rcv(struct sk_buff *skb)
struct icmphdr *icmph;
struct rtable *rt = (struct rtable *)skb->dst;
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb) && skb->sp &&
skb->sp->xvec[skb->sp->len - 1]->props.flags & XFRM_STATE_ICMP) {
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
int nh;
if (!(skb->sp && skb->sp->xvec[skb->sp->len - 1]->props.flags &
XFRM_STATE_ICMP))
goto drop;
if (!pskb_may_pull(skb, sizeof(*icmph) + sizeof(struct iphdr)))
goto drop;

7
net/ipv6/icmp.c
View File

@ -644,10 +644,13 @@ static int icmpv6_rcv(struct sk_buff *skb)
struct icmp6hdr *hdr;
int type;
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb) && skb->sp &&
skb->sp->xvec[skb->sp->len - 1]->props.flags & XFRM_STATE_ICMP) {
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
int nh;
if (!(skb->sp && skb->sp->xvec[skb->sp->len - 1]->props.flags &
XFRM_STATE_ICMP))
goto drop_no_count;
if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(*orig_hdr)))
goto drop_no_count;