diff options
| author | Ulrich Weber <ulrich.weber@sophos.com> | 2012-10-25 05:34:45 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-12-06 11:20:10 +0000 |
| commit | 5c1972f1b4f784560003075e05dcd95c1db8116e (patch) | |
| tree | efbb75cd9f1f554ae5a9b24f17c0ca9555531e51 /net/ipv4 | |
| parent | 58fd4b237523afd2a925ccc664d35f0334da4ffd (diff) | |
netfilter: nf_nat: don't check for port change on ICMP tuples
commit 38fe36a248ec3228f8e6507955d7ceb0432d2000 upstream.
ICMP tuples have id in src and type/code in dst.
So comparing src.u.all with dst.u.all will always fail here
and ip_xfrm_me_harder() is called for every ICMP packet,
even if there was no NAT.
Signed-off-by: Ulrich Weber <ulrich.weber@sophos.com>
[Pablo Neira Ayuso: Backported to.3.0]
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_standalone.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/netfilter/nf_nat_standalone.c b/net/ipv4/netfilter/nf_nat_standalone.c index 92900482ede..e32b54225be 100644 --- a/net/ipv4/netfilter/nf_nat_standalone.c +++ b/net/ipv4/netfilter/nf_nat_standalone.c @@ -194,7 +194,8 @@ nf_nat_out(unsigned int hooknum, if ((ct->tuplehash[dir].tuple.src.u3.ip != ct->tuplehash[!dir].tuple.dst.u3.ip) || - (ct->tuplehash[dir].tuple.src.u.all != + (ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP && + ct->tuplehash[dir].tuple.src.u.all != ct->tuplehash[!dir].tuple.dst.u.all) ) return ip_xfrm_me_harder(skb) == 0 ? ret : NF_DROP; @@ -230,7 +231,8 @@ nf_nat_local_fn(unsigned int hooknum, ret = NF_DROP; } #ifdef CONFIG_XFRM - else if (ct->tuplehash[dir].tuple.dst.u.all != + else if (ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP && + ct->tuplehash[dir].tuple.dst.u.all != ct->tuplehash[!dir].tuple.src.u.all) if (ip_xfrm_me_harder(skb)) ret = NF_DROP; |