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

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Message-ID: <CAJZ5v0ip_OHkSjQwNh5o+p2T2utXozH7DV6DFVp23bw5tzShtQ@mail.gmail.com>
Date:   Tue, 14 Feb 2023 15:07:31 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     rafael@...nel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        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 Tue, Feb 14, 2023 at 10:53 AM Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> 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 ?

Yes, I can.