Assigning the issue to concern owner who is working on fuzzers.
@npm -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

I don't work on v8. Please find someone from that team for this bug, thanks!

Most likely just real timeout. Andreas might be able to verify. Feel free to just close if not actionable.

ClusterFuzz has detected this issue as fixed in range 447739:447795.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4654951931576320

Fuzzer: libfuzzer_v8_wasm_asmjs_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Timeout (exceeds 25 secs)
Crash Address: 
Crash State:
  v8_wasm_asmjs_fuzzer
  
Sanitizer: undefined (UBSAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=445689:445740
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=447739:447795

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv94sLLEZI90An06fM-N5wIy3wCd5K2mreRzbXwIjWLujJEWlm11ezZLI3IT6yQ6vV6xeeBkxAurBieclOvToN1O0LDefGrlHzyBj04JiHeEi_r1dRJrPnXmQvo2Sfhi1aWjtzi6NnyWWLvlYFSSLpc1qsGlsti_Robv2woFU8XoAVJvlfbaeLbDcOtb0N_VwTGcyiozVEtNhGNlSJrswSD0HJIGsnXG1PeIh9hI1cXyxFtv__AOe5HjZSRiLYmutIM-0B5hdgqhOzbIosfGeH881Jee2Dq_KON4igK1Cbb4ZPaqfTYkEczsgygk-Id-rV0He4BE3nvXpqb50R_xLlFqwjY9Iq7SYyo2y1SMivf6cozFvisQ?testcase_id=4654951931576320


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

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.