tree 459736069ba17c28d6f8ee74937ebea4a34b49a4
parent 77c13021dd401945711ff40f16a5040a075fcef9
author Keith Randall <khr@golang.org> 1578359853 -0800
committer Keith Randall <khr@golang.org> 1578509035 +0000

cmd/compile: give every really deep type a unique name

This avoids the security problem in #29312 where two very deep, but
distinct, types are given the same name. They both make it to the
linker which chooses one, and the use of the other is now type unsafe.

Instead, give every very deep type its own name. This errs on the
other side, in that very deep types that should be convertible to each
other might now not be. But at least that's not a security hole.

Update #29312.

Change-Id: Iac0ebe73fdc50594fd6fbf7432eef65f9a053126
Reviewed-on: https://go-review.googlesource.com/c/go/+/213517
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Robert Griesemer <gri@golang.org>