Fix possible crosh on very large images

sylikc · Jun 3, 2024 · 43cce7e · 43cce7e
1 parent 57ac9bc
commit 43cce7e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/JPEGView/XMMImage.cpp b/src/JPEGView/XMMImage.cpp
@@ -18,7 +18,7 @@ CXMMImage::CXMMImage(int nWidth, int nHeight, int nFirstX, int nLastX, int nFirs
 
  if (m_pMemory != NULL) {
  int nSrcLineWidthPadded = Helpers::DoPadding(nWidth * nChannels, 4);
- const uint8* pSrc = (uint8*)pDIB + nFirstY*nSrcLineWidthPadded + nFirstX*nChannels;
+ const uint8* pSrc = (uint8*)pDIB + (long long)nFirstY*(long long)nSrcLineWidthPadded + (long long)nFirstX*(long long)nChannels;
  uint16* pDst = (unsigned short*) m_pMemory;
  for (int j = 0; j < nSectionHeight; j++) {
  if (nChannels == 4) {