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Fix crash on loading invalid PNG files

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(Just a divide by zero)
This commit is contained in:
Ilari Liusvaara 2015-07-25 17:23:59 +03:00
parent d8048863e8
commit 97ba0292d6
1 changed files with 2 additions and 0 deletions
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2
src/library/png.cpp
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@ -816,6 +816,8 @@ void decoder::decode_png(std::istream& stream)
std::vector<uint32_t> ndata;
std::vector<uint32_t> npalette;
ndata.resize(hdr.width * hdr.height);
if(hdr.width == 0 || hdr.height == 0)
throw std::runtime_error("PNG file has zero width or height");
if(ndata.size() / hdr.width != hdr.height)
throw std::bad_alloc();
if(hdr.type == 3) {