Ladybird/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-06-08 05:27:14 +09:00
Code Activity

LibRegex: Check backreference index before looking it up

Browse source 
If a backref happens after it's cleared, the slot may be cleared
already.
This commit is contained in:
Ali Mohammad Pur 2025-04-06 01:56:18 +02:00 • committed by Andreas Kling
parent e695dc1405
commit 299b9ca572
Notes: github-actions[bot] 2025-04-06 18:22:15 +00:00
2 changed files with 5 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
Libraries/LibRegex/RegexByteCode.cpp
View file

@ -585,6 +585,9 @@ ALWAYS_INLINE ExecutionResult OpCode_Compare::execute(MatchInput const& input, M
}
case CharacterCompareType::Reference: {
auto reference_number = (size_t)m_bytecode->at(offset++);
if (input.match_index >= state.capture_group_matches.size())
return ExecutionResult::Failed_ExecuteLowPrioForks;
auto& groups = state.capture_group_matches.at(input.match_index);
if (groups.size() <= reference_number)
return ExecutionResult::Failed_ExecuteLowPrioForks;