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Date: Fri, 26 Jan 2024 17:06:33 +0800
From: Herbert Xu <herbert@gondor.apana.org.au>
To: Erick Archer <erick.archer@gmx.com>
Cc: Corentin Labbe <clabbe.montjoie@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Jonathan Corbet <corbet@lwn.net>,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	linux-hardening@vger.kernel.org
Subject: Re: [PATCH] crypto: sun8i-ce - Use kcalloc() instead of kzalloc()
Message-ID: <ZbN2GfKU18pVEprw@gondor.apana.org.au>
References: <20240121153407.8348-1-erick.archer@gmx.com>
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In-Reply-To: <20240121153407.8348-1-erick.archer@gmx.com>

On Sun, Jan 21, 2024 at 04:34:07PM +0100, Erick Archer wrote:
> As noted in the "Deprecated Interfaces, Language Features, Attributes,
> and Conventions" documentation [1], size calculations (especially
> multiplication) should not be performed in memory allocator (or similar)
> function arguments due to the risk of them overflowing. This could lead
> to values wrapping around and a smaller allocation being made than the
> caller was expecting. Using those allocations could lead to linear
> overflows of heap memory and other misbehaviors.
> 
> So, use the purpose specific kcalloc() function instead of the argument
> size * count in the kzalloc() function.
> 
> Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1]
> Link: https://github.com/KSPP/linux/issues/162
> Signed-off-by: Erick Archer <erick.archer@gmx.com>
> ---
>  drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
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