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Patch "net: freescale: fix potential null pointer dereference" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Apr 10, 2018

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This is a note to let you know that I've just added the patch titled

net: freescale: fix potential null pointer dereference

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
net-freescale-fix-potential-null-pointer-dereference.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Tue Apr 10 10:31:53 CEST 2018

From: "Gustavo A. R. Silva" <[email protected]>
Date: Tue, 30 May 2017 17:38:43 -0500
Subject: net: freescale: fix potential null pointer dereference

From: "Gustavo A. R. Silva" <[email protected]>

[ Upstream commit 06d2d6431bc8d41ef5ffd8bd4b52cea9f72aed22 ]

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

Addresses-Coverity-ID: 1397995

---
 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
@@ -382,7 +382,7 @@ static int fsl_pq_mdio_probe(struct plat
 {
 	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;
@@ -390,6 +390,13 @@ static int fsl_pq_mdio_probe(struct plat
 	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));

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/net-freescale-fix-potential-null-pointer-dereference.patch