tree 7bcf2ce6b7cd2cf91c8703780bfba13274f55b80
parent 253320d25fccbb49621926d49dcf5ef64cf529c6
author Raph Levien <raph@google.com> 1448924699 -0800
committer The Android Automerger <android-build@google.com> 1449794469 -0800

Avoid integer overflows in parsing fonts

A malformed TTF can cause size calculations to overflow. This patch
checks the maximum reasonable value so that the total size fits in 32
bits. It also adds some explicit casting to avoid possible technical
undefined behavior when parsing sized unsigned values.

Bug: 25645298
Change-Id: Id4716132041a6f4f1fbb73ec4e445391cf7d9616
(cherry picked from commit 183c9ec2800baa2ce099ee260c6cbc6121cf1274)