diff options
| author | Wei Yongjun | 2020-04-29 02:52:20 +0000 |
|---|---|---|
| committer | David S. Miller | 2020-05-01 15:27:09 -0700 |
| commit | e00edb4efbbc07425441a3be2aa87abaf5800d96 (patch) | |
| tree | 4be9a7c2f3e416eb5e80d793ccbb2fcafa1ef635 /drivers/net/ethernet | |
| parent | 41a46913bee76d8493681442907ccd989ced2633 (diff) | |
drivers: net: davinci_mdio: fix potential NULL dereference in davinci_mdio_probe()
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
since devm_ioremap() does not check input parameters for null.
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t, n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Fixes: 03f66f067560 ("net: ethernet: ti: davinci_mdio: use devm_ioremap()")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/ti/davinci_mdio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c index 38b7f6d35759..702fdc393da0 100644 --- a/drivers/net/ethernet/ti/davinci_mdio.c +++ b/drivers/net/ethernet/ti/davinci_mdio.c @@ -397,6 +397,8 @@ static int davinci_mdio_probe(struct platform_device *pdev) data->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; data->regs = devm_ioremap(dev, res->start, resource_size(res)); if (!data->regs) return -ENOMEM; |