Commit 1dc56c52 authored Mar 13, 2017 by Johan Hovold Committed by Greg Kroah-Hartman Mar 14, 2017

USB: lvtest: fix NULL-deref at probe

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: stable <stable@vger.kernel.org>     # 3.17
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 b0addd3f

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 */

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