Stall Stick Position
You have to pull to get a stall,
generally speaking at a constant speed the lift that you can create with the wing increases linearly with angle of attack which you increase by pulling back on the stick. It reaches a maximum at the stall where there is a marked increase in airflow separation over the wing. Roll alone cannot cause a stall. Otherwise how would aerobatic aircraft do 360 degree rolls with out falling out of the sky.