diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/fxcodec/jbig2/JBig2_Context.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/core/fxcodec/jbig2/JBig2_Context.cpp b/core/fxcodec/jbig2/JBig2_Context.cpp index ec81990662..5bf9df9dc4 100644 --- a/core/fxcodec/jbig2/JBig2_Context.cpp +++ b/core/fxcodec/jbig2/JBig2_Context.cpp @@ -649,13 +649,13 @@ JBig2_Result CJBig2_Context::ParseTextRegion(CJBig2_Segment* pSegment) { if (m_pStream->readInteger(&pTRD->SBNUMINSTANCES) != 0) return JBig2_Result::kFailure; - // Assume each instance takes at least 4 bits. That means for a stream of - // length N, there can be at most 2N instances. This is an extremely + // Assume each instance takes at least 0.25 bits when encoded. That means for + // a stream of length N bytes, there can be at most 32N instances. This is a // conservative estimate just to sanitize the |SBNUMINSTANCES| value. // Use FX_SAFE_INT32 to be safe, though it should never overflow because PDFs // have a maximum size of roughly 11 GB. FX_SAFE_INT32 nMaxStripInstances = m_pStream->getLength(); - nMaxStripInstances *= 2; + nMaxStripInstances *= 32; if (pTRD->SBNUMINSTANCES > nMaxStripInstances.ValueOrDie()) return JBig2_Result::kFailure; |