Spray a bundt pan with oil. Line with frozen rolls. Melt butter, brown sugar and cinnamon. Spoon ½ mixture over 12 rolls. Sprinkle on ½ package pudding mix, sprinkle with nuts. Repeat layers. Cover and let sit out overnight (maximum 8-10 hours). Bake at 350 degrees for 20-25 minutes. Add foil under and over rolls to prevent spills and excess browning. Check every 5 minutes.