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Date:   Mon, 14 Oct 2019 08:07:10 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Walter Wu <walter-zh.wu@mediatek.com>
Cc:     Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Alexander Potapenko <glider@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        kasan-dev@googlegroups.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com
Subject: Re: [PATCH 2/2] kasan: add test for invalid size in memmove
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On Mon, Oct 14, 2019 at 06:36:54PM +0800, Walter Wu wrote:
> Test size is negative numbers in memmove in order to verify
> whether it correctly get KASAN report.

You're not testing negative numbers, though.  memmove() takes an unsigned
type, so you're testing a very large number.