linux-hardening - Re: [PATCH] kasan: test: Consolidate workarounds for unwanted __alloc

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Message-Id: <20211020141753.6d1ac5ef251367bef260a3fc@linux-foundation.org>
Date:   Wed, 20 Oct 2021 14:17:53 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, kasan-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] kasan: test: Consolidate workarounds for unwanted
 __alloc_size() protection

On Wed, 20 Oct 2021 12:38:07 -0700 Kees Cook <keescook@...omium.org> wrote:

> This fixes kasan-test-use-underlying-string-helpers.patch to avoid needing
> new helpers. As done in kasan-test-bypass-__alloc_size-checks.patch,
> just use OPTIMIZER_HIDE_VAR(). Additionally converts a use of
> "volatile", which was trying to work around similar detection.
> 
> ...
> 
> Can you please collapse this into your series?

Folding it into something else is messy, due to dependencies and
ordering/timing issues.  I queued it as a standalone thing.