Unable to find the exact culprit. Request someone from V8 team to look into the issue.

Appreciate the help.

Thank you!

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5436342024798208

Fuzzer: libfuzzer_v8_regexp_parser_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Direct-leak
Crash Address: 
Crash State:
  Update
  v8::internal::PagedSpace::AllocateRawUnaligned
  v8::internal::Heap::AllocateRaw
  

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv94DKwhd0razY1jZd36UgS4IcASFkmLlqLNuYW_RPq77-nV63cFgKwvLLadFIzkkgTAO6_gHf99l0adrNuwAMJ6hecO4T7aXzCrLu-3euD4eBaDu0XpGNU5XeYUiar3-aMPpegHtEFpqWqQdFWbY88RxyWSFsg?testcase_id=5436342024798208


Filer: mmohammad

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5515456731676672

Fuzzer: libfuzzer_v8_regexp_parser_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Direct-leak
Crash Address: 
Crash State:
  Update
  v8::internal::PagedSpace::AllocateRawUnaligned
  v8::internal::Heap::AllocateRaw
  

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv96rNXXfANLBgIw2MT33-N07oiTj0ObSxl6yRxvQ-urYb4NYiV5kwUd8cQHFxmJNUDwfW4ttP4Qivvag7j9VNSSVfaCTTyCuGga6PdoBlWuVxckQ8FkGGluESaneXCfVPDceTRKFR8dW5wwAYZQCbhYbSTeOAg?testcase_id=5515456731676672


Additional requirements: Requires Gestures

Filer: mmohammad

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5619600628908032

Fuzzer: libfuzzer_v8_regexp_parser_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Direct-leak
Crash Address: 
Crash State:
  Update
  v8::internal::PagedSpace::AllocateRawUnaligned
  v8::internal::Heap::AllocateRaw
  

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv94fl5tqRD2PV9u_zFNeytjerzYhK0_26mGTgxmi2IJPH2UpRbthS4nRCOqwBVqwmrDYR-afrq12U0d_tCpEnBVgg-155Zu83ZANen1RNYDujHDTWrMZK5_mmBKdiXe5NkiyMmynY9R1jeY7yooA003uigU0Fg?testcase_id=5619600628908032


Filer: mmohammad

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5136537469845504

Fuzzer: libfuzzer_v8_regexp_parser_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Direct-leak
Crash Address: 
Crash State:
  Update
  v8::internal::PagedSpace::AllocateRawUnaligned
  v8::internal::Heap::AllocateRaw
  

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv96G1d_cRudmsVENDLDgClAwZcgB2J6MkM3-98IgZDDhQwyQ-xvsoK16lp3ic1LS70U-f4LdGdX1DWfxT2knXTreEokerOhXPZfkN__xhbdL_BheY5-pIy0wY4_ktoDoYr6WgH4ZgxePeTOLI6P_N1JvGGkw1w?testcase_id=5136537469845504


Filer: mummareddy

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

It looks like the v8_fuzzer::DeleteFuzzerSupport() is never called which causes this leak.

mmoroz@ can you help me to reproduce this locally please?

Sorry for the delay, trying to reproduce it now.

Hm, all CF reports linked to this issue are not reproducible.

Well, looks like those reports could be incorrectly marked as reproducible for some time period, but actually they are not (just checked manually). Also there were few updates to CF to improve reproducibility and grouping, so we should expect less problems like that one in future.

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