From 57635e471138a0a1080e1001da4581d182c06d85 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Tue, 7 Mar 2017 15:14:13 -0300
Subject: [PATCH] mceusb: fix NULL-deref at probe

commit 03eb2a557ed552e920a0942b774aaf931596eec1 upstream.

Make sure to check for the required out endpoint to avoid dereferencing
a NULL-pointer in mce_request_packet should a malicious device lack such
an endpoint. Note that this path is hit during probe.

Fixes: 66e89522aff7 ("V4L/DVB: IR: add mceusb IR receiver driver")

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
[bwh: Backported to 3.2: using mce_dbg() instead of dev_dbg()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
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