[Bug sanitizer/81619] pairs of mmap/munmap do not reset asan's user-poisoning flags, leading to invalid error reports

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81619

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This might be a bug in the upstream sources too.