Commit 21e0621e authored Mar 13, 2017 by Johan Hovold Committed by Greg Kroah-Hartman Mar 30, 2017

USB: lvtest: fix NULL-deref at probe



commit 1dc56c52d2484be09c7398a5207d6b11a4256be9 upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should the probed device lack endpoints.

Note that this driver does not bind to any devices by default.

Fixes: ce21bfe6 ("USB: Add LVS Test device driver")
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent e4942716

drivers/usb/misc/lvstest.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -366,6 +366,10 @@ static int lvs_rh_probe(struct usb_interface *intf,

		hdev = interface_to_usbdev(intf);
		desc = intf->cur_altsetting;

		if (desc->desc.bNumEndpoints < 1)
		return -ENODEV;

		endpoint = &desc->endpoint[0].desc;

		/* valid only for SS root hub */