Re: [PATCH v5] kprobes: unpoison stack in jprobe_return() for KASAN

From: Ingo Molnar
Date: Sat Oct 15 2016 - 02:31:25 EST

* Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:

> KASAN stack instrumentation poisons stack redzones on function entry
> and unpoisons them on function exit. If a function exits abnormally
> (e.g. with a longjmp like jprobe_return()), stack redzones are left
> poisoned. Later this leads to random KASAN false reports.
> Unpoison stack redzones in the frames we are going to jump over
> before doing actual longjmp in jprobe_return().

Does this affect any other architecture besides arm64? If not then it might make
the most sense to merge this via the arm64 tree.