Merge commit 'c642d411' into HEAD

DO NOT MERGE - SoftwareRenderer: sanity check buffer size before copying data.

Bug: 21443020
(cherry picked from commit 760f92f8b6da9c9cf128cb18fe3c09402fdde6cd)

Change-Id: I5bc68e3e7f0278b8bbbe0ad5b87d6e8e2dbabd42