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Wysocki" , Zhongqiu Han , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Jianhao Xu Subject: Re: [PATCH v3] cpufreq: initialize policy rwsem before sysfs publication Message-ID: References: <83f87db8-fa13-41d0-ae52-544d22e228e6@oss.qualcomm.com> <20260902041915.3453421-1-runyu.xiao@seu.edu.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260902041915.3453421-1-runyu.xiao@seu.edu.cn> On 02-09-26, 12:19, Runyu Xiao wrote: > 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: 2fc3384dc75b ("cpufreq: Initialize policy->kobj while allocating policy") > Cc: stable@vger.kernel.org > Link: https://lore.kernel.org/all/20260830155301.2713780-1-runyu.xiao@seu.edu.cn/ > Assisted-by: Codex:GPT-5 > Reviewed-by: Zhongqiu Han > Signed-off-by: Runyu Xiao Acked-by: Viresh Kumar -- viresh