linux-kernel - Re: [PATCH][next] drm/nouveau/nvkm: Replace zero-length array with flexible-array member

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Message-ID: <CACO55ttCY1KbqWqzGS1adrJno6kUs7b5_QY7X1AE6qYUqztWNQ@mail.gmail.com>
Date:   Mon, 16 Jan 2023 15:41:29 +0100
From:   Karol Herbst <kherbst@...hat.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Ben Skeggs <bskeggs@...hat.com>, Lyude Paul <lyude@...hat.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] drm/nouveau/nvkm: Replace zero-length array with
 flexible-array member

Reviewed-by: Karol Herbst <kherbst@...hat.com>

will push in a moment

On Thu, Jan 12, 2023 at 11:49 PM Kees Cook <keescook@...omium.org> wrote:
>
> On Mon, Jan 09, 2023 at 07:39:30PM -0600, Gustavo A. R. Silva wrote:
> > Zero-length arrays are deprecated[1] and we are moving towards
> > adopting C99 flexible-array members instead. So, replace zero-length
> > array declaration in struct nvfw_hs_load_header_v2 with flex-array
> > member.
> >
> > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
> > routines on memcpy() and help us make progress towards globally
> > enabling -fstrict-flex-arrays=3 [2].
> >
> > Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays [1]
> > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [2]
> > Link: https://github.com/KSPP/linux/issues/78
> > Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
>
> Reviewed-by: Kees Cook <keescook@...omium.org>
>
> --
> Kees Cook
>