linux-kernel - [PATCH] Thermal - Fix possible NULL derefrence.

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Message-id: <1485752698-30248-1-git-send-email-shailendra.v@samsung.com>
Date:   Mon, 30 Jan 2017 10:34:58 +0530
From:   Shailendra Verma <shailendra.v@...sung.com>
To:     Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        p.shailesh@...sung.com, ashish.kalra@...sung.com,
        Shailendra Verma <shailendra.v@...sung.com>,
        Shailendra Verma <shailendra.capricorn@...il.com>
Subject: [PATCH] Thermal - Fix possible NULL derefrence.

of_device_get_match_data could return NULL, and so can cause
a NULL pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
---
 drivers/thermal/imx_thermal.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 06912f0..fb648a4 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -489,6 +489,10 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	data->tempmon = map;
 
 	data->socdata = of_device_get_match_data(&pdev->dev);
+	if (!data->socdata) {
+		dev_err(&pdev->dev, "no device match found\n");
+		return -ENODEV;
+	}
 
 	/* make sure the IRQ flag is clear before enabling irq on i.MX6SX */
 	if (data->socdata->version == TEMPMON_IMX6SX) {
-- 
1.7.9.5