linux-kernel - Re: [PATCH] ARM: mxs: fix memory leak in mxs_machine

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Message-ID: <20221117091315.wwojwl7vhp43k63v@pengutronix.de>
Date:   Thu, 17 Nov 2022 10:13:15 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     Zheng Yongjun <zhengyongjun3@...wei.com>
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        festevam@...il.com, linux-imx@....com, kernel@...gutronix.de
Subject: Re: [PATCH] ARM: mxs: fix memory leak in mxs_machine_init()

On 22-11-17, Zheng Yongjun wrote:
> If of_property_read_string() failed, 'soc_dev_attr' should be
> freed before return. Otherwise there is a memory leak.
> 
> Fixes: 2046338dcbc6 ("ARM: mxs: Use soc bus infrastructure")
> Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>

Reviewed-by: Marco Felsch <m.felsch@...gutronix.de>

> ---
>  arch/arm/mach-mxs/mach-mxs.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
> index 25c9d184fa4c..1c57ac401649 100644
> --- a/arch/arm/mach-mxs/mach-mxs.c
> +++ b/arch/arm/mach-mxs/mach-mxs.c
> @@ -393,8 +393,10 @@ static void __init mxs_machine_init(void)
> 
>  	root = of_find_node_by_path("/");
>  	ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
> -	if (ret)
> +	if (ret) {
> +		kfree(soc_dev_attr);
>  		return;
> +	}
> 
>  	soc_dev_attr->family = "Freescale MXS Family";
>  	soc_dev_attr->soc_id = mxs_get_soc_id();
> --
> 2.17.1
> 
> 
>