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fix integer overflow when parsing Perl-extended named backrefs

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Christian Mazakas
2025-02-27 09:00:12 -08:00
parent 34b1c2f615
commit f0ae2d8f57
3 changed files with 60 additions and 0 deletions
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5
include/boost/regex/v5/basic_regex_parser.hpp
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@ -898,6 +898,11 @@ escape_type_class_jump:
}
const charT* pc = m_position;
std::intmax_t i = this->m_traits.toi(pc, m_end, 10);
if(i < 0 && !syn_end)
{
fail(regex_constants::error_backref, m_position - m_base);
return false;
}
if((i < 0) && syn_end)
{
// Check for a named capture, get the leftmost one if there is more than one: