diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2025-04-02 15:22:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-04-02 15:22:22 -0700 |
| commit | e0a02923c2cdfc4b8f1ef19181bf40f6529812d3 (patch) | |
| tree | 1a5e5cc72ab5801db4a40d16106d97e99913ce00 | |
| parent | e69e6e468a5c273132e9f87094fea1c62e347899 (diff) | |
| parent | 9e4e249018d208678888bdf22f6b652728106528 (diff) | |
Merge tag 'pm-6.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"Prevent cpufreq_update_limits() from crashing the kernel due to a NULL
pointer dereference when it is called before registering a cpufreq
driver, for instance as a result of a notification triggered by the
platform firmware (Rafael Wysocki)"
* tag 'pm-6.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: Reference count policy in cpufreq_update_limits()
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 0cf5a320bb5e8..3841c9da6cac3 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2809,6 +2809,12 @@ EXPORT_SYMBOL(cpufreq_update_policy); */ void cpufreq_update_limits(unsigned int cpu) { + struct cpufreq_policy *policy __free(put_cpufreq_policy); + + policy = cpufreq_cpu_get(cpu); + if (!policy) + return; + if (cpufreq_driver->update_limits) cpufreq_driver->update_limits(cpu); else |