usbnet: sanitise overlong driver information strings

As seen on smsc75xx, driver_info->description being longer than 32
characters messes up 'ethtool -i' output.
Signed-off-by: NPhil Sutter <phil.sutter@viprinet.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/usbnet.c

@@ -876,9 +876,9 @@ void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
 {
 	struct usbnet *dev = netdev_priv(net);
 
-	strncpy (info->driver, dev->driver_name, sizeof info->driver);
-	strncpy (info->version, DRIVER_VERSION, sizeof info->version);
-	strncpy (info->fw_version, dev->driver_info->description,
+	strlcpy (info->driver, dev->driver_name, sizeof info->driver);
+	strlcpy (info->version, DRIVER_VERSION, sizeof info->version);
+	strlcpy (info->fw_version, dev->driver_info->description,
 		sizeof info->fw_version);
 	usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info);
 }