From: Anastasia Belova abelova@astralinux.ru
[ Upstream commit f661017e6d326ee187db24194cabb013d81bc2a6 ]
cpufreq_cpu_get may return NULL. To avoid NULL-dereference check it and return 0 in case of error.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: de322e085995 ("cpufreq: brcmstb-avs-cpufreq: AVS CPUfreq driver for Broadcom STB SoCs") Signed-off-by: Anastasia Belova abelova@astralinux.ru Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/cpufreq/brcmstb-avs-cpufreq.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c index 541486217984b..1302e1900dcb1 100644 --- a/drivers/cpufreq/brcmstb-avs-cpufreq.c +++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c @@ -457,6 +457,8 @@ static bool brcm_avs_is_firmware_loaded(struct private_data *priv) static unsigned int brcm_avs_cpufreq_get(unsigned int cpu) { struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + if (!policy) + return 0; struct private_data *priv = policy->driver_data;
return brcm_avs_get_frequency(priv->base);