cpufreq: initialize policy rwsem before sysfs publication

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cpufreq_policy_alloc() initializes policy->rwsem after
kobject_init_and_add() has created the policy sysfs directory and its
default attributes. A sysfs access can therefore reach a policy callback
before the semaphore has been initialized.

Initialize policy->rwsem before publishing the policy kobject so sysfs
callbacks always see an initialized semaphore.

Fixes: 2fc3384dc7 ("cpufreq: Initialize policy->kobj while allocating policy")
Cc: All Applicable <stable@vger.kernel.org>
Link: https://lore.kernel.org/all/20260830155301.2713780-1-runyu.xiao@seu.edu.cn/
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20260902041915.3453421-1-runyu.xiao@seu.edu.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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This commit is contained in:

Runyu Xiao 2026-09-02 12:19:15 +08:00 • committed by Rafael J. Wysocki

parent cee9395acd

commit 3e5d1bf4bd

1 changed files with 2 additions and 2 deletions

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drivers/cpufreq/cpufreq.c

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