genl.c: fix a resource leak found by coverity

src/lxc/genl.c

@@ -60,45 +60,46 @@ static int genetlink_resolve_family(const char *family)
 
 	ret = netlink_open(&handler, NETLINK_GENERIC);
 	if (ret)
-		return ret;
+		goto out;
 
 	ret = nla_put_string((struct nlmsg *)&request->nlmsghdr,
 			     CTRL_ATTR_FAMILY_NAME, family);
 	if (ret)
-		goto out;
+		goto out_close;
 
 	ret = netlink_transaction(&handler, (struct nlmsg *)&request->nlmsghdr,
 				  (struct nlmsg *)&reply->nlmsghdr);
 	if (ret < 0)
-		goto out;
+		goto out_close;
 
 	genlmsghdr = NLMSG_DATA(&reply->nlmsghdr);
 	len = reply->nlmsghdr.nlmsg_len;
 
 	ret = -ENOMSG;
 	if (reply->nlmsghdr.nlmsg_type !=  GENL_ID_CTRL)
-		goto out;
+		goto out_close;
 
 	if (genlmsghdr->cmd != CTRL_CMD_NEWFAMILY)
-		goto out;
+		goto out_close;
 
 	ret = -EMSGSIZE;
 	len -= NLMSG_LENGTH(GENL_HDRLEN);
 	if (len < 0)
-		goto out;
+		goto out_close;
 	
 	attr = (struct nlattr *)GENLMSG_DATA(reply);
 	attr = (struct nlattr *)((char *)attr + NLA_ALIGN(attr->nla_len));
 	
 	ret = -ENOMSG;
 	if (attr->nla_type != CTRL_ATTR_FAMILY_ID)
-		goto out;
+		goto out_close;
 
 	ret =  *(__u16 *) NLA_DATA(attr);
+out_close:
+	netlink_close(&handler);
 out:
 	genlmsg_free(request);
 	genlmsg_free(reply);
-	netlink_close(&handler);
 	return ret;
 }