tree 778870a39298b26d70de17bfcc3c2a76202601fb
parent 2958a8faf500b9c01ca968ee46fe89795eafe2a7
author Ryan Harrison <rharrison@chromium.org> 1533325526 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1533325526 +0000

Make CFX_XMLParser less permissive

Currently the parser will accept arbitrary garbage before the first
element begins. This is causing issues with ClusterFuzz since it
generates a lot of trash inputs which take a long time to parse
inspite of being invalid.

This CL adds in a check of how deep the parse is when dealing with
text, and if it is at the top level scope, then only accept the
beginning of the root node.

BUG=chromium:863098

Change-Id: Ie45114ecf488f7e8a68a120d153033c7089d5cdc
Reviewed-on: https://pdfium-review.googlesource.com/39470
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>