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Subject: Re: [PATCH v4 2/2] kasan: add test for invalid size in memmove
To:     Walter Wu <walter-zh.wu@mediatek.com>,
        Alexander Potapenko <glider@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Matthias Brugger <matthias.bgg@gmail.com>
Cc:     kasan-dev@googlegroups.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        wsd_upstream <wsd_upstream@mediatek.com>,
        linux-mediatek@lists.infradead.org,
        Andrew Morton <akpm@linux-foundation.org>
References: <20191112065313.7060-1-walter-zh.wu@mediatek.com>
From:   Andrey Ryabinin <aryabinin@virtuozzo.com>
Message-ID: <619b898f-f9c2-1185-5ea7-b9bf21924942@virtuozzo.com>
Date:   Fri, 22 Nov 2019 01:21:17 +0300
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On 11/12/19 9:53 AM, Walter Wu wrote:
> Test negative size in memmove in order to verify whether it correctly
> get KASAN report.
> 
> Casting negative numbers to size_t would indeed turn up as a large
> size_t, so it will have out-of-bounds bug and be detected by KASAN.
> 
> Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com>
> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>

Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>