The proc_keys_show function in security/keys/proc.c in the Linux kernel through 4.8.2, when the GNU Compiler Collection (gcc) stack protector is enabled, uses an incorrect buffer size for certain timeout data, which allows local users to cause a denial of service (stack memory corruption and panic) by reading the /proc/keys file.
rhn.redhat.com/errata/RHSA-2017-0817.html
www.openwall.com/lists/oss-security/2016/10/13/5
www.securityfocus.com/bid/93544
access.redhat.com/errata/RHSA-2017:1842
access.redhat.com/errata/RHSA-2017:2077
access.redhat.com/errata/RHSA-2017:2669
bugzilla.redhat.com/show_bug.cgi?id=1373966
source.android.com/security/bulletin/2017-01-01.html