commit cad5a1050b7184d828aef9c1dd151c3ab649d37e
 Author: Nathan Kidd <nkidd@opentext.com>
 Date:   Fri Jan 9 09:57:23 2015 -0500

    Unvalidated lengths

    v2: Add overflow check and remove unnecessary check (Julien Cristau)

    This addresses:
    CVE-2017-12184 in XINERAMA
    CVE-2017-12185 in MIT-SCREEN-SAVER
    CVE-2017-12186 in X-Resource
    CVE-2017-12187 in RENDER
Reviewed-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Nathan Kidd <nkidd@opentext.com>
Signed-off-by: Julien Cristau <jcristau@debian.org>
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>