linux-kernel - Re: [PATCH] pinctrl: mediatek: fix a memleak when do dt maps.

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Message-ID: <CAGS+omAZ+rgT2NG4-U7HK4kZJGHqA8n_0EjZpHfePojYYLd1Xw@mail.gmail.com>
Date:	Tue, 17 Nov 2015 10:50:26 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	Hongzhou Yang <hongzhou.yang@...iatek.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Axel Lin <axel.lin@...ics.com>,
	Maoguang Meng <maoguang.meng@...iatek.com>,
	Colin Ian King <colin.king@...onical.com>,
	linux-gpio@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-mediatek@...ts.infradead.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	srv_heupstream <srv_heupstream@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>, biao.huang@...iatek.com
Subject: Re: [PATCH] pinctrl: mediatek: fix a memleak when do dt maps.

On Tue, Nov 17, 2015 at 10:34 AM, Hongzhou Yang
<hongzhou.yang@...iatek.com> wrote:
> configs will kmemdup to dup_configs in pictrl util function.
> So configs need to be freed.
>
> Signed-off-by: Hongzhou Yang <hongzhou.yang@...iatek.com>
> ---
>  Fix a memleak issue.
>
>  drivers/pinctrl/mediatek/pinctrl-mtk-common.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> index bbf0230..0000b5a 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> @@ -568,9 +568,10 @@ static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
>                 }
>         }
>
> -       return 0;
> +       err = 0;
>
>  fail:

This isn't just 'fail' case anymore, so change label name to something
like "exit".

> +       kfree(configs);

Do we also need to kfree in the "if (!num_pins || !maps_per_pin)" error case?

>         return err;
>  }
>
> --
> 1.7.9.5
>
> --
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