tree 81c17cd3dea9ee068408bcaed330dab9a81ee1e3
parent d2e55dd05b263d858ce024eb2cc0b5ff7c45cf9c
author Peter Collingbourne <pcc@google.com> 1679464360 -0700
committer Peter Collingbourne <pcc@google.com> 1679464670 -0700

Disable stack tagging in CloneStartRoutine.

We don't support running threads on a tagged stack. Untagging SP may
lead to accesses to the stack via a non-SP register, which will be tag
checked, and the check will fail. And indeed that's exactly what the
__bionic_clone function does in its first instruction. Fix the problem by
disabling HWASan and MTE stack tagging on CloneStartRoutine, and remove
the call to untag_address, as it is unnecessary.

Bug: 273807460
Change-Id: I94cc56c816897531c0113c856b54ec41b4aab874