linux-kernel - [PATCH] Input: tegra-kbc - Fix possible NULL derefrence.

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Message-id: <1485513756-1854-1-git-send-email-shailendra.v@samsung.com>
Date:   Fri, 27 Jan 2017 16:12:36 +0530
From:   Shailendra Verma <shailendra.v@...sung.com>
To:     Rakesh Iyer <riyer@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-input@...r.kernel.org, linux-tegra@...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>
Cc:     vidushi.koul@...sung.com
Subject: [PATCH] Input: tegra-kbc - Fix possible NULL derefrence.

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

Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
---
 drivers/input/keyboard/tegra-kbc.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index 0c07e10..1f213ba 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -617,6 +617,11 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	const struct of_device_id *match;
 
 	match = of_match_device(tegra_kbc_of_match, &pdev->dev);
+
+	if (!match) {
+		dev_err(&pdev->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
 
 	kbc = devm_kzalloc(&pdev->dev, sizeof(*kbc), GFP_KERNEL);
 	if (!kbc) {
-- 
1.7.9.5