linux-kernel - Re: [PATCH 1/3] cpufreq: qcom: fix memory leak in error path

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Date:   Mon, 10 Oct 2022 11:25:30 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Fabien Parent <fabien.parent@...aro.org>
Cc:     ilia.lin@...nel.org, agross@...nel.org, bjorn.andersson@...aro.org,
        rafael@...nel.org, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] cpufreq: qcom: fix memory leak in error path

On 01-10-22, 19:10, Fabien Parent wrote:
> If for some reason the speedbin length is incorrect, then there is a
> memory leak in the error path because we never free the speedbin buffer.
> This commit fixes the error path to always free the speedbin buffer.
> 
> Signed-off-by: Fabien Parent <fabien.parent@...aro.org>
> ---
>  drivers/cpufreq/qcom-cpufreq-nvmem.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> index 863548f59c3e..3bd38acde4b9 100644
> --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> @@ -213,6 +213,7 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
>  	int speed = 0, pvs = 0, pvs_ver = 0;
>  	u8 *speedbin;
>  	size_t len;
> +	int ret = 0;
>  
>  	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
>  
> @@ -230,7 +231,8 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
>  		break;
>  	default:
>  		dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");
> -		return -ENODEV;
> +		ret = -ENODEV;
> +		goto len_error;
>  	}
>  
>  	snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",
> @@ -238,8 +240,9 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
>  
>  	drv->versions = (1 << speed);
>  
> +len_error:
>  	kfree(speedbin);
> -	return 0;
> +	return ret;
>  }
>  
>  static const struct qcom_cpufreq_match_data match_data_kryo = {

Applied. Thanks.

-- 
viresh