netfilter: ipset: fix crash if IPSET_CMD_NONE command is sent

This patch fixes a crash if that ipset command is sent over nfnetlink.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
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_core.c b/net/netfilter/ipset/ip_set_core.c
index 819c342..9730882 100644 (file)
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -640,6 +640,14 @@ find_free_id(const char *name, ip_set_id_t *index, struct ip_set **set)
 }
 
 static int
+ip_set_none(struct sock *ctnl, struct sk_buff *skb,
+           const struct nlmsghdr *nlh,
+           const struct nlattr * const attr[])
+{
+       return -EOPNOTSUPP;
+}
+
+static int
 ip_set_create(struct sock *ctnl, struct sk_buff *skb,
              const struct nlmsghdr *nlh,
              const struct nlattr * const attr[])
@@ -1539,6 +1547,10 @@ nlmsg_failure:
 }
 
 static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = {
+       [IPSET_CMD_NONE]        = {
+               .call           = ip_set_none,
+               .attr_count     = IPSET_ATTR_CMD_MAX,
+       },
        [IPSET_CMD_CREATE]      = {
                .call           = ip_set_create,
                .attr_count     = IPSET_ATTR_CMD_MAX,