ipvs: use IPVS_CMD_ATTR_MAX for family.maxattr

family.maxattr is the max index for policy[], the size of
ops[] is determined with ARRAY_SIZE().

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/ipvs/ip_vs_ctl.c

@@ -2845,7 +2845,7 @@ static struct genl_family ip_vs_genl_family = {
 	.hdrsize	= 0,
 	.name		= IPVS_GENL_NAME,
 	.version	= IPVS_GENL_VERSION,
-	.maxattr	= IPVS_CMD_MAX,
+	.maxattr	= IPVS_CMD_ATTR_MAX,
 	.netnsok        = true,         /* Make ipvsadm to work on netns */
 };