Such a repair is best considered in two parts, holding it together and sealing it, you might get lucky with a bit of tape doing both, I'd deal with them separately.
I'd put some stiches across it, a cm or so from the edges, then dab a bit of superglue on the needle holes, that will hold it together. Then I'd patch inside and out, doesn't really matter what with as long as it sticks well.
