tmakin/tegra-linux-noble
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value

Browse Source 
BugLink: https://bugs.launchpad.net/bugs/2097301

[ Upstream commit 5493f9714e4cdaf0ee7cec15899a231400cb1a9f ]

cpufreq_cpu_get may return NULL. To avoid NULL-dereference check it
and return in case of error.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Anastasia Belova <abelova@astralinux.ru>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
CVE-2024-50009
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
This commit is contained in:
Anastasia Belova
2024-08-26 16:38:41 +03:00
committed by Mehmet Basaran
parent d485d671aa
commit 2ee22cf44c
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/cpufreq/amd-pstate.c
+6 -1
View File
@@ -645,9 +645,14 @@ static void amd_pstate_adjust_perf(unsigned int cpu,
unsigned long max_perf, min_perf, des_perf,
cap_perf, lowest_nonlinear_perf, max_freq;
struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
struct amd_cpudata *cpudata = policy->driver_data;
struct amd_cpudata *cpudata;
unsigned int target_freq;
if (!policy)
return;
cpudata = policy->driver_data;
if (policy->min != cpudata->min_limit_freq || policy->max != cpudata->max_limit_freq)
amd_pstate_update_min_max_limit(policy);