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From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Thu, 15 Dec 2022 00:06:46 +0200
Message-ID: <CAHp75VdqUMs1uz8zeyDi6rJKayFt6UMrm0A=-Hp8tQpCUSGujQ@mail.gmail.com>
Subject: Re: [PATCH] [next] pcmcia: synclink_cs: replace 1-element array with
 flex-array member
To:     Kees Cook <keescook@chromium.org>
Cc:     Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@gmail.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,
        Jiri Slaby <jirislaby@kernel.org>,
        Haowen Bai <baihaowen@meizu.com>, linux-kernel@vger.kernel.org,
        linux-hardening@vger.kernel.org
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On Wed, Dec 14, 2022 at 11:49 PM Kees Cook <keescook@chromium.org> wrote:
> On Wed, Dec 14, 2022 at 10:39:52PM +0200, Andy Shevchenko wrote:
> > Yes, and Try to make it work with __packed. As I said, the problem is
> > that the code is relying on something which is architecture dependent
> > strictly speaking. And hence I disagree with Kees that v2 is okay to
> > go.
>
> I meant that v2 is functionally identical to the existing code.

Ah, sorry for misunderstanding.

> > The full change should be something like
> >
> > check_add(sizeof(), max_frame_size)
> > kcalloc(8, size)
>
> Right -- this would fix the existing mistakes in size calculation (and
> is certainly better).

Glad to hear that we are on the same page.

-- 
With Best Regards,
Andy Shevchenko