Commit 0b818e39 authored Mar 16, 2016 by Oliver Neukum Committed by Greg Kroah-Hartman Mar 18, 2016

USB: usb_driver_claim_interface: add sanity checking



Attacks that trick drivers into passing a NULL pointer
to usb_driver_claim_interface() using forged descriptors are
known. This thwarts them by sanity checking.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 7222c832

drivers/usb/core/driver.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -502,11 +502,15 @@ static int usb_unbind_interface(struct device *dev)
		int usb_driver_claim_interface(struct usb_driver *driver,
		struct usb_interface iface, void priv)
		{
		struct device *dev = &iface->dev;
		struct device *dev;
		struct usb_device *udev;
		int retval = 0;
		int lpm_disable_error;

		if (!iface)
		return -ENODEV;

		dev = &iface->dev;
		if (dev->driver)
		return -EBUSY;