Cinnamon Rolls for a dessert crust
I expect the "crust" will puff up significantly since it has chemical leavening agents in it, unlike traditional pastry crust. 

Using pie weights would help. Docking the crust (poking with a fork) would help, but might not work with a liquid filling.

If you prepared the pudding separately, chilled it to semi-firm, then poured it in that might work better. 

If all is a failure, a cup of pudding, with a crumbled cinnamon roll topping sounds pretty good too!