From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by smtp.subspace.kernel.org (Postfix) with ESMTPS id 521093D986
	for <llvm@lists.linux.dev>; Mon,  9 Oct 2023 20:19:12 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sntech.de
Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sntech.de
Authentication-Results: smtp.subspace.kernel.org; dkim=none
Received: from [194.95.143.137] (helo=phil.localnet)
	by gloria.sntech.de with esmtpsa  (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.94.2)
	(envelope-from <heiko@sntech.de>)
	id 1qpwiI-0004zP-2L; Mon, 09 Oct 2023 22:18:50 +0200
From: Heiko Stuebner <heiko@sntech.de>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
 Richard Weinberger <richard@nod.at>, Vignesh Raghavendra <vigneshr@ti.com>,
 Kees Cook <keescook@chromium.org>,
 "Gustavo A. R. Silva" <gustavoars@kernel.org>,
 Nathan Chancellor <nathan@kernel.org>,
 Nick Desaulniers <ndesaulniers@google.com>, Tom Rix <trix@redhat.com>,
 Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
 Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
 linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org,
 linux-rockchip@lists.infradead.org, linux-hardening@vger.kernel.org,
 llvm@lists.linux.dev
Subject: Re: [PATCH] mtd: rawnand: rockchip: Use struct_size()
Date: Mon, 09 Oct 2023 22:18:49 +0200
Message-ID: <3186469.5fSG56mABF@phil>
In-Reply-To:
 <481721c2c7fe570b4027dbe231d523961c953d5a.1696146232.git.christophe.jaillet@wanadoo.fr>
References:
 <481721c2c7fe570b4027dbe231d523961c953d5a.1696146232.git.christophe.jaillet@wanadoo.fr>
Precedence: bulk
X-Mailing-List: llvm@lists.linux.dev
List-Id: <llvm.lists.linux.dev>
List-Subscribe: <mailto:llvm+subscribe@lists.linux.dev>
List-Unsubscribe: <mailto:llvm+unsubscribe@lists.linux.dev>
MIME-Version: 1.0
Content-Transfer-Encoding: 7Bit
Content-Type: text/plain; charset="us-ascii"

Am Sonntag, 1. Oktober 2023, 09:44:04 CEST schrieb Christophe JAILLET:
> Use struct_size() instead of hand writing it.
> This is less verbose and more robust.
> 
> While at it, prepare for the coming implementation by GCC and Clang of the
> __counted_by attribute. Flexible array members annotated with __counted_by
> can have their accesses bounds-checked at run-time checking via
> CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for
> strcpy/memcpy-family functions).
> 
> Also remove a useless comment about the position of a flex-array in a
> structure.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Acked-by: Heiko Stuebner <heiko@sntech.de>