linux-kernel - Re: [PATCH] cpufreq: qcom-hw: Add missing null pointer check

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Message-ID: <20230214095300.pv3e73r36poth5w4@vireshk-i7>
Date:   Tue, 14 Feb 2023 15:23:00 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     rafael@...nel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] cpufreq: qcom-hw: Add missing null pointer check

On 14-02-23, 15:11, Manivannan Sadhasivam wrote:
> of_device_get_match_data() may return NULL, so add a check to prevent
> potential null pointer dereference.
> 
> Issue reported by Qualcomm's internal static analysis tool.
> 
> Cc: stable@...r.kernel.org # v6.2
> Fixes: 4f7961706c63 ("cpufreq: qcom-hw: Move soc_data to struct qcom_cpufreq")
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  drivers/cpufreq/qcom-cpufreq-hw.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
> index 340fed35e45d..6425c6b6e393 100644
> --- a/drivers/cpufreq/qcom-cpufreq-hw.c
> +++ b/drivers/cpufreq/qcom-cpufreq-hw.c
> @@ -689,6 +689,8 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	qcom_cpufreq.soc_data = of_device_get_match_data(dev);
> +	if (!qcom_cpufreq.soc_data)
> +		return -ENODEV;
>  
>  	clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, num_domains), GFP_KERNEL);
>  	if (!clk_data)

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

Rafael,

Can you still send this for 6.2 ?

-- 
viresh