tree c92453b3a3ff5a26684de4ad86ae1e76c83a7e9e
parent 6a841c224227cf72f6f96c5f207f7a4b31a5dbf0
author Marco Nelissen <marcone@google.com> 1563895666 -0700
committer JP Sugarbroad <jpsugar@google.com> 1565213493 -0700

Fix OOB access in mpeg4/h263 decoder

The decoder does not support an increase in frame width, and
would exceed its buffer if the width increased mid-stream.
There was an existing check to prevent the total frame size
(width*height) from increasing, but in fact the decoder also
does not even support a width increase, even if the height
decreases correspondingly.

Bug: 136175447
Bug: 136173699
Test: manual
Change-Id: Ic2d28bb0503635dadeb69ba3be9412d58684e910
(cherry picked from commit ef4ce157000b2b5bcbf2bcb36a228ec604803547)