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Regex: limit explicit quantifiers value (too 1000 for now)

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Fixes #1628
This commit is contained in:
Maxime Coste 2017-10-11 19:28:22 +08:00
parent 2b97e4e124
commit 9753bcd0ad
1 changed files with 4 additions and 1 deletions
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5
src/regex_impl.cc
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@ -418,7 +418,8 @@ private:
if (at_end()) if (at_end())
return {ParsedRegex::Quantifier::One}; return {ParsedRegex::Quantifier::One};
auto read_int = [](auto& pos, auto begin, auto end) { constexpr int max_repeat = 1000;
auto read_int = [max_repeat, this](auto& pos, auto begin, auto end) {
int res = 0; int res = 0;
for (; pos != end; ++pos) for (; pos != end; ++pos)
{ {
@ -426,6 +427,8 @@ private:
if (cp < '0' or cp > '9') if (cp < '0' or cp > '9')
return pos == begin ? -1 : res; return pos == begin ? -1 : res;
res = res * 10 + cp - '0'; res = res * 10 + cp - '0';
if (res > max_repeat)
parse_error(format("Explicit quantifier is too big, maximum is {}", max_repeat));
} }
return res; return res;
}; };