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net: freescale: fix potential null pointer dereference

PATCH Applied Gustavo A. R. Silva 2 participants 2 messages May 30, 2017 – May 31, 2017

Subsystems (2)
Networking Network drivers
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Gustavo A. R. Silva

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PATCH 1/1 net: freescale: fix potential null pointer dereference

Add NULL check before dereferencing pointer _id_ in order to avoid a potential NULL pointer dereference.

Addresses-Coverity-ID: 1397995

Signed-off-by Gustavo A. R. Silva <[email protected]>
---
 drivers/net/ethernet/freescale/fsl_pq_mdio.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
drivers/net/ethernet/freescale/fsl_pq_mdio.c +8 -1
index 446c7b3..a10de1e 100644
@@ -381,7 +381,7 @@ static int fsl_pq_mdio_probe(struct platform_device *pdev)
 {
 	const struct of_device_id *id =
 		of_match_device(fsl_pq_mdio_match, &pdev->dev);
-	const struct fsl_pq_mdio_data *data = id->data;
+	const struct fsl_pq_mdio_data *data;
 	struct device_node *np = pdev->dev.of_node;
 	struct resource res;
 	struct device_node *tbi;

@@ -389,6 +389,13 @@ static int fsl_pq_mdio_probe(struct platform_device *pdev)
 	struct mii_bus *new_bus;
 	int err;
 
+	if (!id) {
+		dev_err(&pdev->dev, "Failed to match device\n");
+		return -ENODEV;
+	}
+
+	data = id->data;
+
 	dev_dbg(&pdev->dev, "found %s compatible node\n", id->compatible);
 
 	new_bus = mdiobus_alloc_size(sizeof(*priv));
Signature · 1 line
2.5.0