Commit 592532a7 authored by Dennis Beier's avatar Dennis Beier Committed by Viresh Kumar
Browse files

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: default avatarDennis Beier <nanovim@gmail.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 7bc00846

drivers/cpufreq/longhaul.c

+3 −0
Original line number Diff line number Diff line
@@ -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;