linux-kernel - Re: [PATCH v4 2/2] kasan: add test for invalid size in memmove

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Message-Id: <20200130181613.1bfb8df8e73a280512cab8ef@linux-foundation.org>
Date:   Thu, 30 Jan 2020 18:16:13 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Walter Wu <walter-zh.wu@...iatek.com>
Cc:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "kasan-dev@...glegroups.com" <kasan-dev@...glegroups.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        wsd_upstream <wsd_upstream@...iatek.com>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v4 2/2] kasan: add test for invalid size in memmove

On Thu, 30 Jan 2020 11:43:58 +0800 Walter Wu <walter-zh.wu@...iatek.com> wrote:

> On Fri, 2019-11-22 at 06:21 +0800, Andrey Ryabinin wrote:
> > 
> > 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@...iatek.com>
> > > Reviewed-by: Dmitry Vyukov <dvyukov@...gle.com>
> > 
> > Reviewed-by: Andrey Ryabinin <aryabinin@...tuozzo.com>
> 
> Hi Andrey, Dmitry, Andrew,
> 
> Would you tell me why this patch-sets don't merge into linux-next tree?
> We lost something?
> 

In response to [1/2] Andrey said "So let's keep this code as this" and
you said "I will send a new v5 patch tomorrow".  So we're awaiting a v5
patchset?