linux-kernel - [PATCH] cpufreq: Fix policy->freq_table is NULL in __cpufreq_driver

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Message-Id: <20230329133600.908723-1-yajun.deng@linux.dev>
Date:   Wed, 29 Mar 2023 21:36:00 +0800
From:   Yajun Deng <yajun.deng@...ux.dev>
To:     rafael@...nel.org, viresh.kumar@...aro.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH] cpufreq: Fix policy->freq_table is NULL in __cpufreq_driver_target()

__resolve_freq() may be return target_freq if policy->freq_table is
NULL. In this case, it should return -EINVAL before __target_index().

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
 drivers/cpufreq/cpufreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index c0e5be0fe2d6..308a3df1a940 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2299,7 +2299,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
 		return cpufreq_driver->target(policy, target_freq, relation);
 	}
 
-	if (!cpufreq_driver->target_index)
+	if (!cpufreq_driver->target_index || !policy->freq_table)
 		return -EINVAL;
 
 	return __target_index(policy, policy->cached_resolved_idx);
-- 
2.25.1