platform_get_resource() may fail, therefore, the return value of platform_get_resource should be checked to avoid null pointer dereference in devm_request_region(). Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@xxxxxxx> --- drivers/hwmon/w83627ehf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c index fe960c0a624f..7793a4273e00 100644 --- a/drivers/hwmon/w83627ehf.c +++ b/drivers/hwmon/w83627ehf.c @@ -1703,6 +1703,8 @@ static int __init w83627ehf_probe(struct platform_device *pdev) struct device *hwmon_dev; res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!res) + return -EINVAL; if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME)) return -EBUSY; -- 2.17.1
