Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Miquel Raynal <miquel.raynal@bootlin.com>
To:     =?utf-8?b?TWljaGHFgiBLxJlwaWXFhA==?= <kernel@kempniu.pl>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>
Cc:     Boris Brezillon <boris.brezillon@collabora.com>,
        linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 2/4] mtd: always initialize 'stats' in struct mtd_oob_ops
Date:   Wed, 21 Sep 2022 10:41:11 +0200
Message-Id: <20220921084111.733303-1-miquel.raynal@bootlin.com>
In-Reply-To: <20220629125737.14418-3-kernel@kempniu.pl>
References: 
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Wed, 2022-06-29 at 12:57:35 UTC, =?utf-8?b?TWljaGHFgiBLxJlwaWXFhA==?= wrote:
> As the 'stats' field in struct mtd_oob_ops is used in conditional
> expressions, ensure it is always zero-initialized in all such structures
> to prevent random stack garbage from being interpreted as a pointer.
> 
> Strictly speaking, this problem currently only needs to be fixed for
> struct mtd_oob_ops structures subsequently passed to mtd_read_oob().
> However, this commit goes a step further and makes all instances of
> struct mtd_oob_ops in the tree zero-initialized, in hope of preventing
> future problems, e.g. if struct mtd_req_stats gets extended with write
> statistics at some point.
> 
> Signed-off-by: Michał Kępień <kernel@kempniu.pl>

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

Miquel