Serious, why can't someone ask a regular question and get a normal answer?
I have no experience patching harnesses, but I'll asnwer anyway because I'm really bored
Where are the holes? In the fabric shorts part or in the load bearing harness part?
If it's just in the shorts, Sarc's recommendatation of duct tape sounds pretty good. Maybe try some of that wetsuit repair glue, sail tape, doesn't really matter, it's just shorts.
If there's a tear in the load bearing harness part, I wouldn't trust the harness anymore. If you really want to fix it though you could go to a tailor and have them sew it up for you.