# File lib/brakeman/checks/check_symbol_dos.rb, line 52
  def safe_parameter? input
    if call? input
      if node_type? input.target, :params
        input.method == :[] and
        symbol? input.first_arg and
        [:controller, :action].include? input.first_arg.value
      else
        safe_parameter? input.target
      end
    else
      false
    end
  end