CHROMIUM: KEYS: Fix refcount leak on duplicate name

This fixes CVE-2016-0728, which can lead to local privilege escalation.

BUG=chromium:579179
TEST=`./leak ; cat /proc/keys`

Change-Id: Ie37347746f24060eb89f655f596ee6567139606c
Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Previous-Reviewed-on: https://chromium-review.googlesource.com/322405
(cherry picked from commit f68a31dfa3e83b2b6961d02145f62a95d4b3b599)
Reviewed-on: https://chromium-review.googlesource.com/322792
1 file changed