tree eacbaae6b0e292938139766030378ab037c62003
parent 2bbb55162f0c9490a2085ed6eaa38038a7605609
author Dan Sinclair <dsinclair@chromium.org> 1493151334 -0400
committer Chromium commit bot <commit-bot@chromium.org> 1493226404 +0000

Guard against overflow in CFX_BilinearMatrix code.

If any of the values in the matrix used to initialize the
CFX_BilinearMatrix are close to INT_MAX then the numbers can overflow
when multipled causing undefined behaviour.

This Cl uses a pdfium::CheckedNumeric to handle the multiplications and
then assigns back to the int value if valid.

Bug: chromium:702041
Change-Id: Ia1895e2e39c0ac2bf099d45f97e33209cb50d134
Reviewed-on: https://pdfium-review.googlesource.com/4495
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>