usb: usbtest: fix NULL pointer dereference

If the usbtest driver encounters a device with an IN bulk endpoint but
no OUT bulk endpoint, it will try to dereference a NULL pointer
(out->desc.bEndpointAddress).  The problem can be solved by adding a
missing test.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 113e38bfe0ef..b3fc602b2e24 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -202,12 +202,13 @@ found:
                         return tmp;
         }
 
-        if (in) {
+        if (in)
                 dev->in_pipe = usb_rcvbulkpipe(udev,
                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
+        if (out)
                 dev->out_pipe = usb_sndbulkpipe(udev,
                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
-        }
+
         if (iso_in) {
                 dev->iso_in = &iso_in->desc;
                 dev->in_iso_pipe = usb_rcvisocpipe(udev,