[PATCH 2/6] USB: lvtest: fix NULL-deref at probe

[Johan Hovold]

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: ce21bfe603b3 ("USB: Add LVS Test device driver")
Cc: stable <sta...@vger.kernel.org>     # 3.17
Cc: Pratyush Anand <pratyush.an...@gmail.com>
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
 drivers/usb/misc/lvstest.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
index 77176511658f..d3d124753266 100644
--- a/drivers/usb/misc/lvstest.c
+++ b/drivers/usb/misc/lvstest.c
@@ -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 */
-- 
2.12.0