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authorNicolas Pena <npm@chromium.org>2017-05-16 18:30:24 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-05-17 00:56:02 +0000
commit7876609b3540137663d48282ad94ba42a3749e73 (patch)
tree81c594651cb6a048ee61699a876dd12d5e471082 /xfa/fxfa/fm2js/xfa_fm2jscontext.cpp
parentb332581e185760597e8f0160011b1e6094634ed8 (diff)
downloadpdfium-7876609b3540137663d48282ad94ba42a3749e73.tar.xz
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>
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