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home:bmwiedemann:reproducible:distribution:ring1
djvulibre
djvulibre-CVE-2021-46312.patch
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File djvulibre-CVE-2021-46312.patch of Package djvulibre
Index: djvulibre-3.5.28/libdjvu/IW44EncodeCodec.cpp =================================================================== --- djvulibre-3.5.28.orig/libdjvu/IW44EncodeCodec.cpp +++ djvulibre-3.5.28/libdjvu/IW44EncodeCodec.cpp @@ -1424,7 +1424,12 @@ IWBitmap::Encode::init(const GBitmap &bm int h = bm.rows(); int g = bm.get_grays()-1; signed char *buffer; - GPBuffer<signed char> gbuffer(buffer,w*h); + size_t sz = w * h; + if (sz == 0 || g <= 0) // w or h is zero or g is not positive + G_THROW("IWBitmap: zero size image (corrupted file?)"); + if (sz / (size_t)w != (size_t)h) // multiplication overflow + G_THROW("IWBitmap: image size exceeds maximum (corrupted file?)"); + GPBuffer<signed char> gbuffer(buffer,sz); // Prepare gray level conversion table signed char bconv[256]; for (i=0; i<256; i++)
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