linux-kernel - Re: [PATCH] media: atomisp: use kmalloc

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Message-ID: <aKXkQ0WXaG-hMgEW@smile.fi.intel.com>
Date: Wed, 20 Aug 2025 18:05:39 +0300
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Qianfeng Rong <rongqianfeng@...o.com>
Cc: Andy Shevchenko <andy@...nel.org>, Hans de Goede <hansg@...nel.org>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Colin Ian King <colin.i.king@...il.com>,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	linux-staging@...ts.linux.dev
Subject: Re: [PATCH] media: atomisp: use kmalloc_array() for array space
 allocation

On Sun, Aug 17, 2025 at 05:29:39PM +0800, Qianfeng Rong wrote:
> Replace kmalloc(count * sizeof) with kmalloc_array() for safer memory
> allocation and overflow prevention.

...

> -	descr->in_info = kmalloc(descr->num_stage *
> -				 sizeof(struct ia_css_frame_info),
> -				 GFP_KERNEL);
> +	descr->in_info = kmalloc_array(descr->num_stage,
> +				       sizeof(struct ia_css_frame_info),
> +				       GFP_KERNEL);

At the same time it would be nice to use sizeof(*...) variants instead of using
type-based.

-- 
With Best Regards,
Andy Shevchenko