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| author | Jinjie Ruan <ruanjinjie@huawei.com> | 2024-10-30 04:20:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-05 16:02:06 +0300 |
| commit | 65fe2f7fdafe2698a343661800434b3f2e51041e (patch) | |
| tree | 48e99b49836a757847f75690be9e84961c65833f /drivers/cpufreq/cppc_cpufreq.c | |
| parent | 525e18f1ba7c2b098c8ba587fb397efb34a6574c (diff) | |
| download | linux-65fe2f7fdafe2698a343661800434b3f2e51041e.tar.xz | |
cpufreq: CPPC: Fix possible null-ptr-deref for cpufreq_cpu_get_raw()
[ Upstream commit a78e7207564258db6e373e86294a85f9d646d35a ]
cpufreq_cpu_get_raw() may return NULL if the cpu is not in
policy->cpus cpu mask and it will cause null pointer dereference.
Fixes: 740fcdc2c20e ("cpufreq: CPPC: Register EM based on efficiency class information")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/cpufreq/cppc_cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cppc_cpufreq.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 1a8f95e6cc8d..c90763881005 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -423,6 +423,9 @@ static int cppc_get_cpu_power(struct device *cpu_dev, struct cppc_cpudata *cpu_data; policy = cpufreq_cpu_get_raw(cpu_dev->id); + if (!policy) + return 0; + cpu_data = policy->driver_data; perf_caps = &cpu_data->perf_caps; max_cap = arch_scale_cpu_capacity(cpu_dev->id); |