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| author | Dennis Beier <nanovim@gmail.com> | 2025-08-30 17:43:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-07 00:08:09 +0300 |
| commit | 956b56d17a89775e4957bbddefa45cd3c6c71000 (patch) | |
| tree | ecf4b71b5a2e72a94956481039125ccc589d79d0 | |
| parent | f52d3db6d95a06148665d5ad20d94b6b47d7cba8 (diff) | |
| download | linux-956b56d17a89775e4957bbddefa45cd3c6c71000.tar.xz | |
cpufreq/longhaul: handle NULL policy in longhaul_exit
[ Upstream commit 592532a77b736b5153e0c2e4c74aa50af0a352ab ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.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 182a4dbca095..7197b0daabea 100644 --- a/drivers/cpufreq/longhaul.c +++ b/drivers/cpufreq/longhaul.c @@ -955,6 +955,9 @@ 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; |