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Date:   Mon, 26 Sep 2022 11:23:11 -0700
From:   Kees Cook <keescook@chromium.org>
To:     andrey.konovalov@linux.dev
Cc:     Marco Elver <elver@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Alexander Potapenko <glider@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        kasan-dev@googlegroups.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        Andrey Konovalov <andreyknvl@google.com>,
        kernel test robot <lkp@intel.com>
Subject: Re: [PATCH mm v3] kasan: fix array-bounds warnings in tests
Message-ID: <202209261123.91B4E71B2F@keescook>
References: <e94399242d32e00bba6fd0d9ec4c897f188128e8.1664215688.git.andreyknvl@google.com>
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On Mon, Sep 26, 2022 at 08:08:47PM +0200, andrey.konovalov@linux.dev wrote:
> From: Andrey Konovalov <andreyknvl@google.com>
> 
> GCC's -Warray-bounds option detects out-of-bounds accesses to
> statically-sized allocations in krealloc out-of-bounds tests.
> 
> Use OPTIMIZER_HIDE_VAR to suppress the warning.
> 
> Also change kmalloc_memmove_invalid_size to use OPTIMIZER_HIDE_VAR
> instead of a volatile variable.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook