rndis_wlan: add return value validation
authorPan Bian <bianpan2016@163.com>
Mon, 24 Apr 2017 00:40:28 +0000 (08:40 +0800)
committerKalle Valo <kvalo@codeaurora.org>
Wed, 26 Apr 2017 09:03:49 +0000 (12:03 +0300)
Function create_singlethread_workqueue() will return a NULL pointer if
there is no enough memory, and its return value should be validated
before using. However, in function rndis_wlan_bind(), its return value
is not checked. This may cause NULL dereference bugs. This patch fixes
it.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
drivers/net/wireless/rndis_wlan.c

index eb513628d801648ca483c420d72b7b316cf8c524..490068c020541454897e36bd49d5afed157b617c 100644 (file)
@@ -3428,6 +3428,10 @@ static int rndis_wlan_bind(struct usbnet *usbdev, struct usb_interface *intf)
 
        /* because rndis_command() sleeps we need to use workqueue */
        priv->workqueue = create_singlethread_workqueue("rndis_wlan");
+       if (!priv->workqueue) {
+               wiphy_free(wiphy);
+               return -ENOMEM;
+       }
        INIT_WORK(&priv->work, rndis_wlan_worker);
        INIT_DELAYED_WORK(&priv->dev_poller_work, rndis_device_poller);
        INIT_DELAYED_WORK(&priv->scan_work, rndis_get_scan_results);