linux-hardening - Re: [PATCH][next] crypto: qat - Use static

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Message-ID: <Zr4g0exFCQXwR2H4@gcabiddu-mobl.ger.corp.intel.com>
Date: Thu, 15 Aug 2024 16:37:53 +0100
From: "Cabiddu, Giovanni" <giovanni.cabiddu@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
CC: Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller"
	<davem@...emloft.net>, <qat-linux@...el.com>, <linux-crypto@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-hardening@...r.kernel.org>
Subject: Re: [PATCH][next] crypto: qat - Use static_assert() to check struct
 sizes

On Thu, Aug 08, 2024 at 04:05:26PM -0600, Gustavo A. R. Silva wrote:
> Commit 140e4c85d540 ("crypto: qat - Avoid -Wflex-array-member-not-at-end
> warnings") introduced tagged `struct qat_alg_buf_list_hdr`. We want to
> ensure that when new members need to be added to the flexible structure,
> they are always included within this tagged struct.
> 
> So, we use `static_assert()` to ensure that the memory layout for
> both the flexible structure and the tagged struct is the same after
> any changes.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@...el.com>