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Message-ID: <20240324234027.1354210-51-sashal@kernel.org>
Date: Sun, 24 Mar 2024 19:37:18 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Anastasia Belova <abelova@...ralinux.ru>,
Viresh Kumar <viresh.kumar@...aro.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 050/238] cpufreq: brcmstb-avs-cpufreq: add check for cpufreq_cpu_get's return value
From: Anastasia Belova <abelova@...ralinux.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@...ralinux.ru>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.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 f644c5e325fb2..38ec0fedb247f 100644
--- a/drivers/cpufreq/brcmstb-avs-cpufreq.c
+++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c
@@ -481,6 +481,8 @@ 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;
cpufreq_cpu_put(policy);
--
2.43.0
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