pbos@, assigning to you as a go-to person for WebRTC crashes.

FindIt says that the following CL is the culprit:

The result is a list of CLs that change the crashed files.

Author: Soren Skak Jensen
Project: chromium-opus
Changelist: https://chromium.googlesource.com/chromium/deps/opus.git/+/fab6397ae6b7ba9f500c87ea8b457570804b8bb0
Time: Tue Mar 15 13:51:28 2016
Lines 173-179 of file CNG.c which potentially caused crash are changed in this cl (frame #0, "silk_CNG").
Minimum distance from crash line to modified line: 0. (file: CNG.c, crashed on: 173, modified: 173).

Suspected Project: chromium-opus

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bb7f9001306231ccea72c29836d601e6ffb8533d

commit bb7f9001306231ccea72c29836d601e6ffb8533d
Author: flim <flim@chromium.org>
Date: Tue Sep 20 12:25:14 2016

Opus: Fixes overflow in CNG

Patching in fix from upstream
https://git.xiph.org/?p=opus.git;a=commitdiff;h=5da0498a3e23339aaceba659a97e935031d5693d

BUG= 648061 

Review-Url: https://codereview.chromium.org/2349213003
Cr-Commit-Position: refs/heads/master@{#419724}

[modify] https://crrev.com/bb7f9001306231ccea72c29836d601e6ffb8533d/third_party/opus/README.chromium
[modify] https://crrev.com/bb7f9001306231ccea72c29836d601e6ffb8533d/third_party/opus/src/silk/CNG.c

ClusterFuzz has detected this issue as fixed in range 419718:419788.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5675843194191872

Fuzzer: libfuzzer_audio_decoder_opus_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  silk_CNG
  silk_decode_frame
  silk_Decode
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=407796:407929
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=419718:419788

Minimized Testcase (0.26 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97u0_Hz7u7V9UFALVhJmvmZo-zvB76wNWPchDFPda3DX--H-x-yOudqPQlWi2N65hdweq2Clh_Vsy1ftqBfr37hYTtoKITtvlsw5JQxthbIY6ezW1lKrpTVWghYaJo2_9uXtlsRbhVZ8NJhoJITue73zWU2-w?testcase_id=5675843194191872

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.

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