linux-kernel - [PATCH] cpuidle: qcom-spm: add missing put_device() call in spm_cpuidle

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <1639052485-23414-1-git-send-email-wangqing@vivo.com>
Date:   Thu,  9 Dec 2021 04:21:24 -0800
From:   Qing Wang <wangqing@...o.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Wang Qing <wangqing@...o.com>
Subject: [PATCH] cpuidle: qcom-spm: add missing put_device() call in spm_cpuidle_register()

From: Wang Qing <wangqing@...o.com>

of_find_device_by_node() takes a reference to the embedded struct device 
which needs to be dropped when error return.

Signed-off-by: Wang Qing <wangqing@...o.com>
---
 drivers/cpuidle/cpuidle-qcom-spm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-qcom-spm.c b/drivers/cpuidle/cpuidle-qcom-spm.c
index 01e7791..6638c1d
--- a/drivers/cpuidle/cpuidle-qcom-spm.c
+++ b/drivers/cpuidle/cpuidle-qcom-spm.c
@@ -107,12 +107,16 @@ static int spm_cpuidle_register(struct device *cpuidle_dev, int cpu)
 		return -ENODEV;
 
 	data = devm_kzalloc(cpuidle_dev, sizeof(*data), GFP_KERNEL);
-	if (!data)
+	if (!data) {
+		put_device(&pdev->dev);
 		return -ENOMEM;
+	}
 
 	data->spm = dev_get_drvdata(&pdev->dev);
-	if (!data->spm)
+	if (!data->spm) {
+		put_device(&pdev->dev);
 		return -EINVAL;
+	}
 
 	data->cpuidle_driver = qcom_spm_idle_driver;
 	data->cpuidle_driver.cpumask = (struct cpumask *)cpumask_of(cpu);
-- 
2.7.4