linux-hardening - Re: [PATCH][next] xen: Replace one-element array with flexible-array member

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Message-ID: <f1715894-8bb5-fef9-3f92-77ae293ebfb4@suse.com>
Date:   Mon, 13 Feb 2023 09:12:38 +0100
From:   Juergen Gross <jgross@...e.com>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] xen: Replace one-element array with flexible-array
 member

On 03.02.23 02:28, Gustavo A. R. Silva wrote:
> One-element arrays are deprecated, and we are replacing them with flexible
> array members instead. So, replace one-element array with flexible-array
> member in struct xen_page_directory.
> 
> 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 [1].
> 
> This results in no differences in binary output.
> 
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/KSPP/linux/issues/255
> Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen


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