From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gustavo A. R. Silva" Subject: [PATCH] net: freescale: fix potential null pointer dereference Date: Tue, 30 May 2017 17:38:43 -0500 Message-ID: <20170530223842.GA11915@embeddedgus> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" To: netdev@vger.kernel.org Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 --- drivers/net/ethernet/freescale/fsl_pq_mdio.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/fsl_pq_mdio.c b/drivers/net/ethernet/freescale/fsl_pq_mdio.c index 446c7b3..a10de1e 100644 --- a/drivers/net/ethernet/freescale/fsl_pq_mdio.c +++ b/drivers/net/ethernet/freescale/fsl_pq_mdio.c @@ -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)); -- 2.5.0