linux-kernel - Re: [PATCH v3] crypto: qat - use kcalloc() in qat_uclo_map_objs_from

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Message-ID: <aK8KsPlsSyB3lXqV@gcabiddu-mobl.ger.corp.intel.com>
Date: Wed, 27 Aug 2025 14:40:00 +0100
From: Giovanni Cabiddu <giovanni.cabiddu@...el.com>
To: Qianfeng Rong <rongqianfeng@...o.com>
CC: Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller"
	<davem@...emloft.net>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Jack Xu <jack.xu@...el.com>, Suman Kumar Chakraborty
	<suman.kumar.chakraborty@...el.com>, Colin Ian King <colin.i.king@...il.com>,
	<qat-linux@...el.com>, <linux-crypto@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] crypto: qat - use kcalloc() in
 qat_uclo_map_objs_from_mof()

On Thu, Aug 21, 2025 at 10:20:26PM +0800, Qianfeng Rong wrote:
> As noted in the kernel documentation [1], open-coded multiplication in
> allocator arguments is discouraged because it can lead to integer overflow.
> 
> Use kcalloc() to gain built-in overflow protection, making memory
> allocation safer when calculating allocation size compared to explicit
> multiplication.  Similarly, use size_add() instead of explicit addition
> for 'uobj_chunk_num + sobj_chunk_num'.
> 
> Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments #1
> Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@...el.com>

Regards,

-- 
Giovanni