linux-hardening - Re: [PATCH] [next] pcmcia: synclink_cs: replace 1-element array with flex-array member

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 15 Dec 2022 00:06:46 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Haowen Bai <baihaowen@...zu.com>, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH] [next] pcmcia: synclink_cs: replace 1-element array with
 flex-array member

On Wed, Dec 14, 2022 at 11:49 PM Kees Cook <keescook@...omium.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