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-rw-r--r--core/src/fxcodec/jbig2/JBig2_Image.cpp13
1 files changed, 10 insertions, 3 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_Image.cpp b/core/src/fxcodec/jbig2/JBig2_Image.cpp
index 5da1fc63d0..03929b84c8 100644
--- a/core/src/fxcodec/jbig2/JBig2_Image.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Image.cpp
@@ -4,10 +4,12 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-#include "JBig2_Image.h"
+#include <limits.h>
#include "../../../include/fxcrt/fx_basic.h"
#include "../../../include/fxcrt/fx_coordinates.h"
-#include <limits.h>
+#include "../../../src/fxcrt/fx_safe_types.h"
+#include "JBig2_Image.h"
+
CJBig2_Image::CJBig2_Image(FX_INT32 w, FX_INT32 h)
{
m_nWidth = w;
@@ -768,7 +770,12 @@ void CJBig2_Image::expand(FX_INT32 h, FX_BOOL v)
if (!m_pData) {
return;
}
- m_pData = (FX_BYTE*)m_pModule->JBig2_Realloc(m_pData, h * m_nStride);
+ FX_SAFE_DWORD safeMemSize = pdfium::base::checked_cast<FX_DWORD>(h);
+ safeMemSize *= pdfium::base::checked_cast<FX_DWORD>(m_nStride);
+ if (!safeMemSize.IsValid()) {
+ return;
+ }
+ m_pData = (FX_BYTE*)m_pModule->JBig2_Realloc(m_pData, safeMemSize.ValueOrDie());
if(h > m_nHeight) {
JBIG2_memset(m_pData + m_nHeight * m_nStride, v ? 0xff : 0, (h - m_nHeight)*m_nStride);
}