netfilter: ipset: allow a 0 netmask with hash_netiface type

Jozsef says:
 The correct behaviour is that if we have
 ipset create test1 hash:net,iface
 ipset add test1 0.0.0.0/0,eth0
 iptables -A INPUT -m set --match-set test1 src,src

 then the rule should match for any traffic coming in through eth0.

This removes the -EINVAL runtime test to make matching work
in case packet arrived via the specified interface.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1297092
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
index 43d8c9896fa3e66ea7f76ee1b7934c3129a46fd3..f0f688db6213930ad568b645080eb171bb30f345 100644 (file)
--- a/net/netfilter/ipset/ip_set_hash_netiface.c
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -164,8 +164,6 @@ hash_netiface4_kadt(struct ip_set *set, const struct sk_buff *skb,
        };
        struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
 
-       if (e.cidr == 0)
-               return -EINVAL;
        if (adt == IPSET_TEST)
                e.cidr = HOST_MASK;
 
@@ -377,8 +375,6 @@ hash_netiface6_kadt(struct ip_set *set, const struct sk_buff *skb,
        };
        struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
 
-       if (e.cidr == 0)
-               return -EINVAL;
        if (adt == IPSET_TEST)
                e.cidr = HOST_MASK;