[PATCH] drm/tegra: sor: add NULL check on of_match_device() return value

Gustavo A. R. Silva
2017-07-07T06:11:19Z

Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.

In case of NULL print error message and return.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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 a8f5289..ca3d9b1 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -2538,6 +2538,10 @@ 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, "failed to match device\n");
+ return -ENODEV;
+ }

sor = devm_kzalloc(&pdev->dev, sizeof(*sor), GFP_KERNEL);
if (!sor)
--
2.5.0