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LibRegex: Consume exactly two chars for escaped characters

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We were previously consuming an extra char afterwards, which could be
the charclass terminator, leading to possible OOB accesses.
This commit is contained in:
Ali Mohammad Pur 2022-09-06 23:56:12 +04:30 • committed by Ali Mohammad Pur
commit 48442059fc
Notes: sideshowbarker 2024-07-17 07:14:38 +09:00
1 changed files with 5 additions and 2 deletions
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7
Userland/Libraries/LibRegex/RegexParser.cpp
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@ -2701,10 +2701,13 @@ size_t ECMA262Parser::ensure_total_number_of_capturing_parenthesis()
continue;
case '[':
while (!lexer.is_eof()) {
if (lexer.consume_specific('\\'))
if (lexer.consume_specific('\\')) {
lexer.consume();
else if (lexer.consume_specific(']'))
continue;
}
if (lexer.consume_specific(']')) {
break;
}
lexer.consume();
}
break;