tree 81c594651cb6a048ee61699a876dd12d5e471082
parent b332581e185760597e8f0160011b1e6094634ed8
author Nicolas Pena <npm@chromium.org> 1494973824 -0400
committer Chromium commit bot <commit-bot@chromium.org> 1494982562 +0000

Gif: Detect string decoding errors

This CL adds some checks to make sure the DecodeString method does not go out
out control:
If code is equal to code_table[code].prefix, it will try to loop forever.
Even if that's not the case, avoid reading a negative position from the stack.

Bug: chromium:722672
Change-Id: I638f91542ba21f3a9915198fef853cc3cf94f4f1
Reviewed-on: https://pdfium-review.googlesource.com/5513
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>