diff options
| author | Florent Fourcot <florent.fourcot@wifirst.fr> | 2018-06-04 16:51:19 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-03 07:50:23 +0200 |
| commit | 52f072f580e4e5acfc65e40273e1cd4b544fbe63 (patch) | |
| tree | c2967bc8713922a84ce60d2391fcccbeaf667ab5 /net/netfilter | |
| parent | a47ece2b17c2e28524f8434857e0deab72ada33e (diff) | |
netfilter: ipset: forbid family for hash:mac sets
[ Upstream commit cbdebe481a14b42c45aa9f4ceb5ff19b55de2c57 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/netfilter')
| -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 51063d9ed0f7..dfd268166e42 100644 --- a/net/netfilter/ipset/ip_set_hash_gen.h +++ b/net/netfilter/ipset/ip_set_hash_gen.h @@ -1241,7 +1241,10 @@ 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 |