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LibRegex: Restore checkpoints when restoring the state post-fork

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Fixes the lockup/OOM in #968.
This commit is contained in:
Ali Mohammad Pur 2024-10-08 19:22:33 +02:00 • committed by Andreas Kling
commit cc1f0c3af2
Notes: github-actions[bot] 2024-10-09 09:21:57 +00:00
3 changed files with 9 additions and 6 deletions
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Tests/LibRegex/Regex.cpp
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@ -705,6 +705,8 @@ TEST_CASE(ECMA262_match)
{ "a$"sv, "a\r\n"sv, true, global_multiline.value() }, // $ should accept all LineTerminators in ECMA262 mode with Multiline.
{ "^a"sv, "\ra"sv, true, global_multiline.value() },
{ "^(.*?):[ \\t]*([^\\r\\n]*)$"sv, "content-length: 488\r\ncontent-type: application/json; charset=utf-8\r\n"sv, true, global_multiline.value() },
{ "^\\?((&?category=[0-9]+)?(&?shippable=1)?(&?ad_type=demand)?(&?page=[0-9]+)?(&?locations=(r|d)_[0-9]+)?)+$"sv,
"?category=54&shippable=1&baby_age=p,0,1,3"sv, false }, // ladybird#968, ?+ should not loop forever.
};
// clang-format on
@ -981,6 +983,7 @@ TEST_CASE(theoretically_infinite_loop)
"(a*?)*"sv, // Infinitely matching empty substrings, the outer loop should short-circuit.
"(a*)*?"sv, // Should match exactly nothing.
"(?:)*?"sv, // Should not generate an infinite fork loop.
"(a?)+$"sv, // Infinitely matching empty strings, but with '+' instead of '*'.
};
for (auto& pattern : patterns) {
Regex<ECMA262> re(pattern);