linux-kernel - Re: drivers/cpufreq/qcom-cpufreq-hw.c:377 qcom_cpufreq_hw_cpu_init() error: we previously assumed 'data' could be null (see line 327)

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Message-ID: <20210228011202.GD24428@dragon>
Date:   Sun, 28 Feb 2021 09:12:03 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     kbuild@...ts.01.org, lkp@...el.com, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: drivers/cpufreq/qcom-cpufreq-hw.c:377 qcom_cpufreq_hw_cpu_init()
 error: we previously assumed 'data' could be null (see line 327)

On Sat, Feb 27, 2021 at 12:26:20PM +0300, Dan Carpenter wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   8b83369ddcb3fb9cab5c1088987ce477565bb630
> commit: 67fc209b527d023db4d087c68e44e9790aa089ef cpufreq: qcom-hw: drop devm_xxx() calls from init/exit hooks
> config: arm64-randconfig-m031-20210226 (attached as .config)
> compiler: aarch64-linux-gcc (GCC) 9.3.0
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> 
> smatch warnings:
> drivers/cpufreq/qcom-cpufreq-hw.c:377 qcom_cpufreq_hw_cpu_init() error: we previously assumed 'data' could be null (see line 327)
> drivers/cpufreq/qcom-cpufreq-hw.c:377 qcom_cpufreq_hw_cpu_init() error: dereferencing freed memory 'data'

Thanks for the report!  I will send a fix for it right away.

Shawn