The following revision refers to this bug:
  https://chromium.googlesource.com/external/webrtc.git/+/9b2228fdfc63ad0280de4f12eb9f12bc38d291f4

commit 9b2228fdfc63ad0280de4f12eb9f12bc38d291f4
Author: kwiberg <kwiberg@webrtc.org>
Date: Tue May 17 13:40:41 2016

Fix UBSan errors (left shift of negative value)

BUG= chromium:603501 

Review-Url: https://codereview.webrtc.org/1988723002
Cr-Commit-Position: refs/heads/master@{#12775}

[modify] https://crrev.com/9b2228fdfc63ad0280de4f12eb9f12bc38d291f4/webrtc/modules/audio_coding/codecs/ilbc/get_lsp_poly.c
[modify] https://crrev.com/9b2228fdfc63ad0280de4f12eb9f12bc38d291f4/webrtc/modules/audio_coding/codecs/ilbc/hp_output.c

According to my manual testing, that CL should have fixed the bug.

ClusterFuzz has detected this issue as fixed in range 394360:394410.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6293977053003776

Fuzzer: libfuzzer_audio_decoder_ilbc_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  WebRtcIlbcfix_GetLspPoly
  WebRtcIlbcfix_Lsf2Poly
  WebRtcIlbcfix_LspInterpolate2PolyDec
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=386932:386961
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=394360:394410

Minimized Testcase (0.04 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97GHFv4KOfA3U34xZeRhDdBUTTgt6u_A62U2RYIyf3ZFB718yVtiSml0W1QxoCFjOfuC44WReACCITzMiAqBr5iLjvlyvSRCN4Jbn4ZtD7ASaEvi-jMzpJrWTD3gWkddC8BCKfO3A3traVRQjrZPVDfRuU23Q

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.

Removing EditIssue view restrictions from ClusterFuzz filed bugs. If you believe that this issue should still be restricted, please reapply the label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot