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>
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@ -502,11 +502,15 @@ static int usb_unbind_interface(struct device *dev)
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int usb_driver_claim_interface(struct usb_driver *driver,
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struct usb_interface *iface, void *priv)
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{
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struct device *dev = &iface->dev;
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struct device *dev;
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struct usb_device *udev;
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int retval = 0;
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int lpm_disable_error;
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if (!iface)
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return -ENODEV;
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dev = &iface->dev;
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if (dev->driver)
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return -EBUSY;
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