tree a4b98d93df8da65d6acbb8a9dfd388c96efae9ff
parent 1fbc7512fab56fc8095852a4c5cdf9e42a19f199
author Peter Collingbourne <peter@pcc.me.uk> 1607156553 -0800
committer Copybara-Service <copybara-worker@google.com> 1608019902 -0800

scudo: Fix quarantine allocation when MTE enabled.

Quarantines have always been broken when MTE is enabled because the
quarantine batch allocator fails to reset tags that may have been
left behind by a user allocation.

This was only noticed when running the Scudo unit tests with Scudo
as the system allocator because quarantines are turned off by
default on Android and the test binary turns them on by defining
__scudo_default_options, which affects the system allocator as well.

Differential Revision: https://reviews.llvm.org/D92881

GitOrigin-RevId: e5a28e1261a0c42821cb3bd4dc40092c458fadfb