Provide references for CVE-2015-6640.
Where can I find more information about CVE-2015-6640?
References are available at: http://www.securitytracker.com/id/1034592, http://source.android.com/security/bulletin/2016-01-01.html, https://android.googlesource.com/kernel%2Fcommon/+/69bfe2d957d903521d32324190c2754cb073be15.