Drill out the minimum amount you need to get rid of any loose wood etc so you have a good straight sided round hole. Drill a piece of scrap with the same drill a couple of times. Whittle, cut sand shape a repair piece from good clean hardwood, try not to use teak, or other oily woods, they are harder to glue well. Make it 5mm or so longer than the hole. Use the holes in the scrap to trial fit the repair piece. It avoids straining the stock with oversize bits. Then cut a narrow groove in the repair piece from one end to the other to let air & glue out when the things pushed in if it's a blind hole it might push itself out unless you clamp it in. Then vacuum out all the dust in the hole in the stock, get all the dust off the repair plug which should be a close but not a tight fit. Use a 2 component slow cure epoxy adhesive ie Araldite follow the makers instructions. When mixed apply some inside the hole with a coctail stick or similar, to coat the interior surface, coat the repair bit too. Put the repair piece in with a slight twisting motion.wipe of the excess. Leave it for at least a few days. Trim to length, sand, pilot hole etc.as I say not the only way but without seeing it, it's a best guess, cheers