It's worse than that. According to certain physical theories, it is possible to have a finite volume without having a boundary. Sort of like earth having a finite area, but no edge to fall off of despite having a finite area.
IOW, even "the void" has a limit. There is no such thing as "nothingness on and on."
To take it even farther, (i can't type, spelled it 'farter' 3 times), according to fractal mathematics, shorelines are an example of a boundry of infinite length, yet enclose a finite area.