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cpufreq/longhaul: handle NULL policy in longhaul_exit 

longhaul_exit() was calling cpufreq_cpu_get(0) without checking
for a NULL policy pointer. On some systems, this could lead to a
NULL dereference and a kernel warning or panic.

This patch adds a check using unlikely() and returns early if the
policy is NULL.

Bugzilla: #219962

Signed-off-by: Dennis Beier <nanovim@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Dennis Beier 2025-08-30 16:43:59 +02:00 committed by Viresh Kumar
parent 7bc0084632
commit 592532a77b
1 changed files with 3 additions and 0 deletions
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3
drivers/cpufreq/longhaul.c
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@ -953,6 +953,9 @@ static void __exit longhaul_exit(void)
struct cpufreq_policy *policy = cpufreq_cpu_get(0);
int i;
if (unlikely(!policy))
return;
for (i = 0; i < numscales; i++) {
if (mults[i] == maxmult) {
struct cpufreq_freqs freqs;