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Pl_PNGFilter: disallow columns = 0

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This commit is contained in:
Jay Berkenbilt 2017-08-29 12:27:44 -04:00
parent 6d46346eb9
commit 742190bd98
1 changed files with 4 additions and 0 deletions
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4
libqpdf/Pl_PNGFilter.cc
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@ -14,6 +14,10 @@ Pl_PNGFilter::Pl_PNGFilter(char const* identifier, Pipeline* next,
buf2(0), buf2(0),
pos(0) pos(0)
{ {
if (columns == 0)
{
throw std::runtime_error("PNGFilter created with columns = 0");
}
this->buf1 = new unsigned char[columns + 1]; this->buf1 = new unsigned char[columns + 1];
this->buf2 = new unsigned char[columns + 1]; this->buf2 = new unsigned char[columns + 1];
this->cur_row = buf1; this->cur_row = buf1;