linux-hardening - Re: [PATCH][next] ALSA: hda/hdmi: Replace zero-length array with DECLARE_FLEX

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Message-ID: <202208291507.FBA7EF4@keescook>
Date:   Mon, 29 Aug 2022 15:07:16 -0700
From:   Kees Cook <keescook@...omium.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] ALSA: hda/hdmi: Replace zero-length array with
 DECLARE_FLEX_ARRAY() helper

On Mon, Aug 29, 2022 at 04:52:03PM -0500, Gustavo A. R. Silva wrote:
> Zero-length arrays are deprecated and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length array
> declaration in union audio_infoframe with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for a flexible-array member in a union.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook