linux-kernel - Re: [PATCH 0/4] pinctrl: use kcalloc() instead of kzalloc()

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Message-ID: <CACRpkdZrDRH9figXST9G7QbJbwSJqg4E3eXmXQ-+2z=k2+jYjg@mail.gmail.com>
Date: Thu, 21 Aug 2025 13:29:17 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Qianfeng Rong <rongqianfeng@...o.com>
Cc: Steen Hegelund <Steen.Hegelund@...rochip.com>, 
	Daniel Machon <daniel.machon@...rochip.com>, 
	"maintainer:ARM/Microchip Sparx5 SoC support" <UNGLinuxDriver@...rochip.com>, Michal Simek <michal.simek@....com>, 
	Bjorn Andersson <andersson@...nel.org>, Chen-Yu Tsai <wens@...e.org>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Samuel Holland <samuel@...lland.org>, 
	"moderated list:ARM/Microchip Sparx5 SoC support" <linux-arm-kernel@...ts.infradead.org>, 
	"open list:PIN CONTROL SUBSYSTEM" <linux-gpio@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, 
	"open list:ARM/QUALCOMM MAILING LIST" <linux-arm-msm@...r.kernel.org>, 
	"open list:ARM/Allwinner sunXi SoC support" <linux-sunxi@...ts.linux.dev>
Subject: Re: [PATCH 0/4] pinctrl: use kcalloc() instead of kzalloc()

On Tue, Aug 19, 2025 at 4:39 PM Qianfeng Rong <rongqianfeng@...o.com> wrote:

> Replace devm_kzalloc() with devm_kcalloc() in drivers/pinctrl.  As noted
> in the kernel documentation [1], open-coded multiplication in allocator
> arguments is discouraged because it can lead to integer overflow.
>
> Use devm_kcalloc() to gain built-in overflow protection, making memory
> allocation safer when calculating allocation size compared to explicit
> multiplication.

All patches applied!

Yours,
Linus Walleij