From de7718bd9c4d3db96991a98c2a0cb38258a04e47 Mon Sep 17 00:00:00 2001 From: Stefan Koch Date: Sat, 8 Aug 2015 11:32:52 +0200 Subject: [PATCH] usb: interface authorization: Control interface probing and claiming Driver probings and interface claims get rejected if an interface is not authorized. Signed-off-by: Stefan Koch Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/driver.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 6b5063e7943f..941625465e2a 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -296,6 +296,10 @@ static int usb_probe_interface(struct device *dev) if (udev->authorized == 0) { dev_err(&intf->dev, "Device is not authorized for usage\n"); return error; + } else if (intf->authorized == 0) { + dev_err(&intf->dev, "Interface %d is not authorized for usage\n", + intf->altsetting->desc.bInterfaceNumber); + return error; } id = usb_match_dynamic_id(intf, driver); @@ -508,6 +512,10 @@ int usb_driver_claim_interface(struct usb_driver *driver, if (dev->driver) return -EBUSY; + /* reject claim if not iterface is not authorized */ + if (!iface->authorized) + return -ENODEV; + udev = interface_to_usbdev(iface); dev->driver = &driver->drvwrap.driver; -- 2.20.1