From: Uwe Kleine-König u.kleine-koenig@pengutronix.de
[ Upstream commit 5d8f384a9b4fc50f6a18405f1c08e5a87a77b5b3 ]
The remove function first frees the clks and only then calls cpufreq_unregister_driver(). If one of the cpufreq callbacks is called just before cpufreq_unregister_driver() is run, the freed clks might be used.
Fixes: 6601b8030de3 ("davinci: add generic CPUFreq driver for DaVinci") Signed-off-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de Acked-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org (cherry picked from commit a5f024d0e6f91e05c816ad4ee8837173369dd5cb) [ kovalev: bp to fix CVE-2023-53544 ] Signed-off-by: Vasiliy Kovalev kovalev@altlinux.org --- drivers/cpufreq/davinci-cpufreq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c index 91f477a6cbc4..62380f05aec8 100644 --- a/drivers/cpufreq/davinci-cpufreq.c +++ b/drivers/cpufreq/davinci-cpufreq.c @@ -133,12 +133,14 @@ static int __init davinci_cpufreq_probe(struct platform_device *pdev)
static int __exit davinci_cpufreq_remove(struct platform_device *pdev) { + cpufreq_unregister_driver(&davinci_driver); + clk_put(cpufreq.armclk);
if (cpufreq.asyncclk) clk_put(cpufreq.asyncclk);
- return cpufreq_unregister_driver(&davinci_driver); + return 0; }
static struct platform_driver davinci_cpufreq_driver = {