This looks similar to  bug 803809 , hence assigning to the same dev for more updates on this issue.

aleloi@ Could you please take a look in to this issue?

Thanks!

ClusterFuzz has detected this issue as fixed in range 540793:540794.

Detailed report: https://clusterfuzz.com/testcase?key=4939815045562368

Fuzzer: libFuzzer_audio_processing_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  AllPassFilter
  SplitFilter
  WebRtcVad_CalculateFeatures
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=537973:537987
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=540793:540794

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4939815045562368

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

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

ClusterFuzz testcase 4939815045562368 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.