diff options
| author | Dennis Beier <nanovim@gmail.com> | 2025-08-30 16:43:59 +0200 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2025-09-01 10:50:28 +0530 |
| commit | 592532a77b736b5153e0c2e4c74aa50af0a352ab (patch) | |
| tree | ef045dcb4c1a4bc09ba4171c2adf30d1ff461c26 | |
| parent | 7bc0084632dda2907ff1d021dff36ffbdd83468c (diff) | |
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>
| -rw-r--r-- | drivers/cpufreq/longhaul.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c index ba0e08c8486a..49e76b44468a 100644 --- a/drivers/cpufreq/longhaul.c +++ b/drivers/cpufreq/longhaul.c @@ -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; |