linux-hardening - Re: [PATCH] uapi: wireless: Replace zero-length array with flexible-array member

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Message-ID: <20220326004244.GC2602091@embeddedor>
Date:   Fri, 25 Mar 2022 19:42:44 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        Johannes Berg <johannes.berg@...el.com>
Subject: Re: [PATCH] uapi: wireless: Replace zero-length array with
 flexible-array member

On Wed, Feb 16, 2022 at 12:36:27PM -0800, Kees Cook wrote:
> On Wed, Feb 16, 2022 at 01:53:06PM -0600, Gustavo A. R. Silva wrote:
> > There is a regular need in the kernel to provide a way to declare
> > having a dynamically sized set of trailing elements in a structure.
> > Kernel code should always use “flexible array members”[1] for these
> > cases. The older style of one-element or zero-length arrays should
> > no longer be used[2].
> > 
> > [1] https://en.wikipedia.org/wiki/Flexible_array_member
> > [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
> > 
> > Link: https://github.com/KSPP/linux/issues/78
> > Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> 
> This UAPI change should be fine for any compiler that understood the
> older "[0]" syntax.
> 
> Reviewed-by: Kees Cook <keescook@...omium.org>

Hi all,

Friendly ping: can someone take this, please?

...I can take this in my -next tree in the meantime.

Thanks
--
Gustavo