linux-kernel - [PATCH] Gpu: drm: tegra - Fix possible NULL derefrence.

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Message-id: <1485752025-29465-1-git-send-email-shailendra.v@samsung.com>
Date:   Mon, 30 Jan 2017 10:23:45 +0530
From:   Shailendra Verma <shailendra.v@...sung.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Stephen Warren <swarren@...dotorg.org>,
        Alexandre Courbot <gnurou@...il.com>,
        dri-devel@...ts.freedesktop.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>
Subject: [PATCH] Gpu: drm: tegra - 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/gpu/drm/tegra/sor.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index 74d0540..34f032f 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -2540,6 +2540,10 @@ static int tegra_sor_probe(struct platform_device *pdev)
 	int err;
 
 	match = of_match_device(tegra_sor_of_match, &pdev->dev);
+	if (!match) {
+		dev_err(&pdev->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
 
 	sor = devm_kzalloc(&pdev->dev, sizeof(*sor), GFP_KERNEL);
 	if (!sor)
-- 
1.7.9.5