linux-kernel - Re: [PATCH v2][next] ALSA: firewire-lib: Avoid -Wflex-array-member-not-at-end warning

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Message-ID: <20240326043317.GA125304@workstation.local>
Date: Tue, 26 Mar 2024 13:33:17 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Clemens Ladisch <clemens@...isch.de>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
	linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2][next] ALSA: firewire-lib: Avoid
 -Wflex-array-member-not-at-end warning

Hi,

On Mon, Mar 25, 2024 at 07:59:34PM -0600, Gustavo A. R. Silva wrote:
> Use the `DEFINE_FLEX()` helper for an on-stack definition of a
> flexible structure where the size of the flexible-array member
> is known at compile-time, and refactor the rest of the code,
> accordingly.
> 
> So, with these changes, fix the following warning:
> sound/firewire/amdtp-stream.c:1184:46: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> 
> Link: https://github.com/KSPP/linux/issues/202
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> ---
> Changes in v2:
>  - Use DEFINE_FLEX() helper instead of a new tagged struct.
> 
> v1:
>  - Link: https://lore.kernel.org/linux-hardening/d3a764eb76909b16b8a22d9ff530e5edf0e59e6b.1709658886.git.gustavoars@kernel.org/
> 
>  sound/firewire/amdtp-stream.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)

It looks good to me.

Reviewed-by: Takashi Sakamoto <o-takashi@...amocchi.jp>

I remark that the change requires a commit d8e45f2929b9 "overflow: Change
DEFINE_FLEX to take __counted_by member"), added to v6.9-rc1.


Thanks

Takashi Sakamoto