Its always nice to have some info on the table to make these plays, but I think 4-bet shove is appropriate here with a short stack. Hard to know what open limp/rr at the CO means, but it would be strange to find AK,AA,KK,QQ here. So at worse, you should be flipping if called. Villain should lay down small pocket pairs to 4-bet all in, so I like the play.