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Subject[PATCH 4.9 29/39] usb: usbtest: fix NULL pointer dereference
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alan Stern <stern@rowland.harvard.edu>

commit 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 upstream.

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>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/misc/usbtest.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -209,12 +209,13 @@ 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,

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