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| author | Nicolas Pena <npm@chromium.org> | 2017-08-30 15:50:09 -0400 |
|---|---|---|
| committer | Chromium commit bot <commit-bot@chromium.org> | 2017-08-30 20:07:56 +0000 |
| commit | fd70d79ca67ac87dd95ab23d548b1fcb879ad259 (patch) | |
| tree | d23251e5d07bef79d613d2a2c93ddc21f07135d2 | |
| parent | 674bbfe24ded465a4d27b268ca84f75976d556da (diff) | |
| download | pdfium-fd70d79ca67ac87dd95ab23d548b1fcb879ad259.tar.xz | |
Fix undefined shift in CJBig2_Context::decodeSymbolIDHuffmanTable
Bug: chromium:755532
Change-Id: Ib04426fab52d0ca1d2544a21fd2ce4faaa57123f
Reviewed-on: https://pdfium-review.googlesource.com/12430
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>
| -rw-r--r-- | core/fxcodec/jbig2/JBig2_Context.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/core/fxcodec/jbig2/JBig2_Context.cpp b/core/fxcodec/jbig2/JBig2_Context.cpp index eaaed312d6..778db1c591 100644 --- a/core/fxcodec/jbig2/JBig2_Context.cpp +++ b/core/fxcodec/jbig2/JBig2_Context.cpp @@ -7,6 +7,7 @@ #include "core/fxcodec/jbig2/JBig2_Context.h" #include <algorithm> +#include <limits> #include <list> #include <utility> #include <vector> @@ -1254,8 +1255,10 @@ std::vector<JBig2HuffmanCode> CJBig2_Context::decodeSymbolIDHuffmanTable( int32_t nBits = 0; uint32_t nTemp; while (true) { - if (pStream->read1Bit(&nTemp) != 0) + if (nVal > std::numeric_limits<int32_t>::max() / 2 || + pStream->read1Bit(&nTemp) != 0) { return std::vector<JBig2HuffmanCode>(); + } nVal = (nVal << 1) | nTemp; ++nBits; |