From 9dc7efd3978aa67ae598129d2a3f240b390ce508 Mon Sep 17 00:00:00 2001 From: Pan Bian Date: Mon, 24 Apr 2017 08:40:28 +0800 Subject: [PATCH] rndis_wlan: add return value validation 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 Signed-off-by: Kalle Valo --- drivers/net/wireless/rndis_wlan.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c index eb513628d801..490068c02054 100644 --- a/drivers/net/wireless/rndis_wlan.c +++ b/drivers/net/wireless/rndis_wlan.c @@ -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); -- 2.39.5