From: Yangtao Li <tiny.windzz@gmail.com>
Date: Sat, 16 Feb 2019 16:31:48 +0000 (-0500)
Subject: cpufreq: scmi: Fix use-after-free in scmi_cpufreq_exit()
X-Git-Tag: v5.4-rc1~1516^2~1^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8cbd468bdeb5ed3acac2d7a9f7494d5b77e46297;p=platform%2Fkernel%2Flinux-rpi.git

cpufreq: scmi: Fix use-after-free in scmi_cpufreq_exit()

This issue was detected with the help of Coccinelle. So
change the order of function calls to fix it.

Fixes: 1690d8bb91e37 (cpufreq: scpi/scmi: Fix freeing of dynamic OPPs)

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: 4.20+ <stable@vger.kernel.org> # 4.20+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index 242c337..9ed46d1 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -187,8 +187,8 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy)
 
 	cpufreq_cooling_unregister(priv->cdev);
 	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
-	kfree(priv);
 	dev_pm_opp_remove_all_dynamic(priv->cpu_dev);
+	kfree(priv);
 
 	return 0;
 }