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| author | Florent Fourcot <florent.fourcot@wifirst.fr> | 2018-06-04 16:51:19 +0200 |
|---|---|---|
| committer | Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2018-06-06 14:01:00 +0200 |
| commit | cbdebe481a14b42c45aa9f4ceb5ff19b55de2c57 (patch) | |
| tree | a62a6f19548cbd09b22c5800bf663aafe0945a7f /net | |
| parent | netfilter: ipset: Limit max timeout value (diff) | |
| download | linux-cbdebe481a14b42c45aa9f4ceb5ff19b55de2c57.tar.xz linux-cbdebe481a14b42c45aa9f4ceb5ff19b55de2c57.zip | |
netfilter: ipset: forbid family for hash:mac sets
Userspace `ipset` command forbids family option for hash:mac type:
ipset create test hash:mac family inet4
ipset v6.30: Unknown argument: `family'
However, this check is not done in kernel itself. When someone use
external netlink applications (pyroute2 python library for example), one
can create hash:mac with invalid family and inconsistant results from
userspace (`ipset` command cannot read set content anymore).
This patch enforce the logic in kernel, and forbids insertion of
hash:mac with a family set.
Since IP_SET_PROTO_UNDEF is defined only for hash:mac, this patch has no
impact on other hash:* sets
Signed-off-by: Florent Fourcot <florent.fourcot@wifirst.fr>
Signed-off-by: Victorien Molle <victorien.molle@wifirst.fr>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/ipset/ip_set_hash_gen.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h index bbad940c0137..8a33dac4e805 100644 --- a/net/netfilter/ipset/ip_set_hash_gen.h +++ b/net/netfilter/ipset/ip_set_hash_gen.h @@ -1234,7 +1234,10 @@ IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set, pr_debug("Create set %s with family %s\n", set->name, set->family == NFPROTO_IPV4 ? "inet" : "inet6"); -#ifndef IP_SET_PROTO_UNDEF +#ifdef IP_SET_PROTO_UNDEF + if (set->family != NFPROTO_UNSPEC) + return -IPSET_ERR_INVALID_FAMILY; +#else if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6)) return -IPSET_ERR_INVALID_FAMILY; #endif |