Pass locals with render_component

I want to pass locals along with render_component

<%=render_component(
                            :controller => 'html_module',
                            :action => "index",
                            :locals => {:module_info => "my module
information"})
%>

How can I access locals from my Controller?

I tried

class HtmlModuleController < ActionController::Base
    def index
            @message = module_info
     end
end

But it does not work