| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 058/121] net: freescale: fix potential null pointer dereference | Date | Wed, 11 Apr 2018 20:36:01 +0200 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
[ Upstream commit 06d2d6431bc8d41ef5ffd8bd4b52cea9f72aed22 ]
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 <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/net/ethernet/freescale/fsl_pq_mdio.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/freescale/fsl_pq_mdio.c +++ b/drivers/net/ethernet/freescale/fsl_pq_mdio.c @@ -370,7 +370,7 @@ 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; @@ -378,6 +378,13 @@ 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));
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