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authorIlia Lin <ilia.lin@gmail.com>2018-06-17 21:58:42 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-06-19 10:35:59 +0200
commitee3dbcf963c17775417d2fdf74e60f0c1b563dda (patch)
tree369c3cf01992985d9e6d114fa13ef26f9691de6f /drivers/cpufreq
parentce397d215ccd07b8ae3f71db689aedb85d56ab40 (diff)
downloadlinux-ee3dbcf963c17775417d2fdf74e60f0c1b563dda.tar.gz
cpufreq: kryo: Fix possible error code dereference
In event of error returned by the nvmem_cell_read() non-pointer value may be dereferenced. Fix this with error handling. Additionally free the allocated speedbin buffer, as per the API. Fixes: 9ce36edd1a52 (cpufreq: Add Kryo CPU scaling driver) Signed-off-by: Ilia Lin <ilia.lin@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/qcom-cpufreq-kryo.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c b/drivers/cpufreq/qcom-cpufreq-kryo.c
index d049fe4b80c4..74b9b93d511b 100644
--- a/drivers/cpufreq/qcom-cpufreq-kryo.c
+++ b/drivers/cpufreq/qcom-cpufreq-kryo.c
@@ -115,6 +115,8 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
speedbin = nvmem_cell_read(speedbin_nvmem, &len);
nvmem_cell_put(speedbin_nvmem);
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
switch (msm8996_version) {
case MSM8996_V3:
@@ -127,6 +129,7 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
BUG();
break;
}
+ kfree(speedbin);
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);