linux-kernel - [PATCH] Pinctrl: mvebu - Fix possible NULL derefrence.

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Date:   Mon, 30 Jan 2017 10:21:43 +0530
From:   Shailendra Verma <shailendra.v@...sung.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Andreas Klinger <ak@...klinger.de>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Andrew Lunn <andrew@...n.ch>, Jamie Lentin <jm@...tin.co.uk>,
        Rob Herring <robh@...nel.org>, linux-gpio@...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] Pinctrl: mvebu - Fix possible NULL derefrence.

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

Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
---
 drivers/pinctrl/mvebu/pinctrl-dove.c     |    4 ++++
 drivers/pinctrl/mvebu/pinctrl-kirkwood.c |    4 ++++
 drivers/pinctrl/mvebu/pinctrl-orion.c    |    4 ++++
 3 files changed, 12 insertions(+)

diff --git a/drivers/pinctrl/mvebu/pinctrl-dove.c b/drivers/pinctrl/mvebu/pinctrl-dove.c
index f93ae0d..f9fe6d4 100644
--- a/drivers/pinctrl/mvebu/pinctrl-dove.c
+++ b/drivers/pinctrl/mvebu/pinctrl-dove.c
@@ -769,6 +769,10 @@ static int dove_pinctrl_probe(struct platform_device *pdev)
 	struct resource fb_res;
 	const struct of_device_id *match =
 		of_match_device(dove_pinctrl_of_match, &pdev->dev);
+	if (!match) {
+		dev_err(&pdev->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
 	pdev->dev.platform_data = (void *)match->data;
 
 	/*
diff --git a/drivers/pinctrl/mvebu/pinctrl-kirkwood.c b/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
index 5f89c26..75efb83 100644
--- a/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
+++ b/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
@@ -472,6 +472,10 @@ static int kirkwood_pinctrl_probe(struct platform_device *pdev)
 	struct resource *res;
 	const struct of_device_id *match =
 		of_match_device(kirkwood_pinctrl_of_match, &pdev->dev);
+	if (!match) {
+		dev_err(&pdev->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
 	pdev->dev.platform_data = (void *)match->data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/drivers/pinctrl/mvebu/pinctrl-orion.c b/drivers/pinctrl/mvebu/pinctrl-orion.c
index 84e1441..559ac32 100644
--- a/drivers/pinctrl/mvebu/pinctrl-orion.c
+++ b/drivers/pinctrl/mvebu/pinctrl-orion.c
@@ -225,6 +225,10 @@ static int orion_pinctrl_probe(struct platform_device *pdev)
 		of_match_device(orion_pinctrl_of_match, &pdev->dev);
 	struct resource *res;
 
+	if (!match) {
+		dev_err(&pdev->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
 	pdev->dev.platform_data = (void*)match->data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-- 
1.7.9.5