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imgcodecs(bmp): limit size of processed images

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2Gb+ images can't be handled properly by current implementation

backporting of commit: 50a6f9d251
This commit is contained in:
Alexander Alekhin 2019-03-31 10:43:30 +00:00
parent 6316b3ed91
commit ccb89a889a
1 changed files with 3 additions and 0 deletions
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3
modules/imgcodecs/src/grfmt_bmp.cpp
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@ -203,6 +203,9 @@ bool BmpDecoder::readData( Mat& img )
int nch = color ? 3 : 1;
int y, width3 = m_width*nch;
// FIXIT: use safe pointer arithmetic (avoid 'int'), use size_t, intptr_t, etc
CV_Assert(((uint64)m_height * m_width * nch < (CV_BIG_UINT(1) << 30)) && "BMP reader implementation doesn't support large images >= 1Gb");
if( m_offset < 0 || !m_strm.isOpened())
return false;