From: Guenter Roeck <linux@roeck-us.net>
Date: Tue, 8 Aug 2017 12:56:21 +0000 (-0400)
Subject: media: uvcvideo: Prevent heap overflow when accessing mapped controls
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c889e4cbe9b3975b3f8d109c397b0b8ef2d7bd2f;p=pandora-kernel.git

media: uvcvideo: Prevent heap overflow when accessing mapped controls

commit 7e09f7d5c790278ab98e5f2c22307ebe8ad6e8ba upstream.

The size of uvc_control_mapping is user controlled leading to a
potential heap overflow in the uvc driver. This adds a check to verify
the user provided size fits within the bounds of the defined buffer
size.

Originally-from: Richard Simmons <rssimmo@amazon.com>

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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