linux-kernel - [PATCH] powercap: dtpm_devfreq: Fix possible memory leak in __dtpm_devfreq

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Message-ID: <20241026082525.474914-1-ruanjinjie@huawei.com>
Date: Sat, 26 Oct 2024 16:25:25 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <daniel.lezcano@...nel.org>, <rafael@...nel.org>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH] powercap: dtpm_devfreq: Fix possible memory leak in __dtpm_devfreq_setup()

If dev_pm_qos_add_request() fails, dtpm_devfreq will fail
to free, which cause the memory leak, add a new goto label
to free it.

Fixes: e44655617317 ("powercap/drivers/dtpm: Add dtpm devfreq with energy model support")
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 drivers/powercap/dtpm_devfreq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/powercap/dtpm_devfreq.c b/drivers/powercap/dtpm_devfreq.c
index d1dff6ccab12..85b6982901d1 100644
--- a/drivers/powercap/dtpm_devfreq.c
+++ b/drivers/powercap/dtpm_devfreq.c
@@ -171,8 +171,7 @@ static int __dtpm_devfreq_setup(struct devfreq *devfreq, struct dtpm *parent)
 	ret = dtpm_register(dev_name(dev), &dtpm_devfreq->dtpm, parent);
 	if (ret) {
 		pr_err("Failed to register '%s': %d\n", dev_name(dev), ret);
-		kfree(dtpm_devfreq);
-		return ret;
+		goto out_dtpm_free;
 	}
 
 	ret = dev_pm_qos_add_request(dev, &dtpm_devfreq->qos_req,
@@ -190,6 +189,8 @@ static int __dtpm_devfreq_setup(struct devfreq *devfreq, struct dtpm *parent)
 out_dtpm_unregister:
 	dtpm_unregister(&dtpm_devfreq->dtpm);
 
+out_dtpm_free:
+	kfree(dtpm_devfreq);
 	return ret;
 }
 
-- 
2.34.1