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From: Miaoqian Lin <linmq006@gmail.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amitk@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Anson Huang <Anson.Huang@nxp.com>,
	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH v2] thermal: imx_sc_thermal: Fix refcount leak in imx_sc_thermal_probe
Date: Tue, 17 May 2022 09:51:21 +0400	[thread overview]
Message-ID: <20220517055121.18092-1-linmq006@gmail.com> (raw)

of_find_node_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: e20db70dba1c ("thermal: imx_sc: add i.MX system controller thermal support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
changes in v2:
- use goto statement, also move of_node_put(sensor_np) to goto label
v1 Link: https://lore.kernel.org/all/20220516073151.25918-1-linmq006@gmail.com/
---
 drivers/thermal/imx_sc_thermal.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/imx_sc_thermal.c b/drivers/thermal/imx_sc_thermal.c
index 8d76dbfde6a9..331a241eb0ef 100644
--- a/drivers/thermal/imx_sc_thermal.c
+++ b/drivers/thermal/imx_sc_thermal.c
@@ -94,8 +94,8 @@ static int imx_sc_thermal_probe(struct platform_device *pdev)
 		sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
 		if (!sensor) {
 			of_node_put(child);
-			of_node_put(sensor_np);
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto put_node;
 		}
 
 		ret = thermal_zone_of_get_sensor_id(child,
@@ -124,7 +124,9 @@ static int imx_sc_thermal_probe(struct platform_device *pdev)
 			dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n");
 	}
 
+put_node:
 	of_node_put(sensor_np);
+	of_node_put(np);
 
 	return ret;
 }
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Miaoqian Lin <linmq006@gmail.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amitk@kernel.org>, Zhang Rui <rui.zhang@intel.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Anson Huang <Anson.Huang@nxp.com>,
	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH v2] thermal: imx_sc_thermal: Fix refcount leak in imx_sc_thermal_probe
Date: Tue, 17 May 2022 09:51:21 +0400	[thread overview]
Message-ID: <20220517055121.18092-1-linmq006@gmail.com> (raw)

of_find_node_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: e20db70dba1c ("thermal: imx_sc: add i.MX system controller thermal support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
changes in v2:
- use goto statement, also move of_node_put(sensor_np) to goto label
v1 Link: https://lore.kernel.org/all/20220516073151.25918-1-linmq006@gmail.com/
---
 drivers/thermal/imx_sc_thermal.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/imx_sc_thermal.c b/drivers/thermal/imx_sc_thermal.c
index 8d76dbfde6a9..331a241eb0ef 100644
--- a/drivers/thermal/imx_sc_thermal.c
+++ b/drivers/thermal/imx_sc_thermal.c
@@ -94,8 +94,8 @@ static int imx_sc_thermal_probe(struct platform_device *pdev)
 		sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
 		if (!sensor) {
 			of_node_put(child);
-			of_node_put(sensor_np);
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto put_node;
 		}
 
 		ret = thermal_zone_of_get_sensor_id(child,
@@ -124,7 +124,9 @@ static int imx_sc_thermal_probe(struct platform_device *pdev)
 			dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n");
 	}
 
+put_node:
 	of_node_put(sensor_np);
+	of_node_put(np);
 
 	return ret;
 }
-- 
2.25.1


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             reply	other threads:[~2022-05-17  5:51 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-17  5:51 Miaoqian Lin [this message]
2022-05-17  5:51 ` [PATCH v2] thermal: imx_sc_thermal: Fix refcount leak in imx_sc_thermal_probe Miaoqian Lin
2022-05-19 12:44 ` [thermal: thermal/next] thermal/drivers/imx_sc_thermal: " thermal-bot for Miaoqian Lin

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