linux-hardening - Re: [PATCH] mtd: rawnand: Annotate struct mtk_nfc_nand_chip with __counted

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Message-Id: <20231016092905.289116-1-miquel.raynal@bootlin.com>
Date: Mon, 16 Oct 2023 11:29:05 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Kees Cook <keescook@...omium.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>
Cc: Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Thierry Reding <treding@...dia.com>,
	Roger Quadros <rogerq@...nel.org>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Cai Huoqing <cai.huoqing@...ux.dev>,
	Chuanhong Guo <gch981213@...il.com>,
	Rob Herring <robh@...nel.org>,
	Li Zetao <lizetao1@...wei.com>,
	linux-mtd@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-hardening@...r.kernel.org,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Tom Rix <trix@...hat.com>,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: Re: [PATCH] mtd: rawnand: Annotate struct mtk_nfc_nand_chip with __counted_by

On Fri, 2023-10-06 at 20:17:28 UTC, Kees Cook wrote:
> 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 via CONFIG_UBSAN_BOUNDS (for
> array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
> 
> As found with Coccinelle[1], add __counted_by for struct
> mtk_nfc_nand_chip.
> 
> Cc: Miquel Raynal <miquel.raynal@...tlin.com>
> Cc: Richard Weinberger <richard@....at>
> Cc: Vignesh Raghavendra <vigneshr@...com>
> Cc: Matthias Brugger <matthias.bgg@...il.com>
> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>
> Cc: Heiko Stuebner <heiko@...ech.de>
> Cc: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> Cc: Thierry Reding <treding@...dia.com>
> Cc: Roger Quadros <rogerq@...nel.org>
> Cc: "Uwe Kleine-König" <u.kleine-koenig@...gutronix.de>
> Cc: Cai Huoqing <cai.huoqing@...ux.dev>
> Cc: Chuanhong Guo <gch981213@...il.com>
> Cc: Rob Herring <robh@...nel.org>
> Cc: Li Zetao <lizetao1@...wei.com>
> Cc: linux-mtd@...ts.infradead.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-mediatek@...ts.infradead.org
> Cc: linux-hardening@...r.kernel.org
> Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel