Ivo, please, take a look at this.

The following revision refers to this bug:
  https://chromium.googlesource.com/external/webrtc.git/+/abf1752ff44481cff17b5bfada8e18bf537fe27d

commit abf1752ff44481cff17b5bfada8e18bf537fe27d
Author: ivoc <ivoc@webrtc.org>
Date: Tue Jan 10 11:37:20 2017

Fix for left shift of potentially negative value.

Left shifting of negative integers is undefined behavior, and should be prevented. This CL fixes one such instance in the Levinson Durbin function.

BUG= chromium:675349 

Review-Url: https://codereview.webrtc.org/2621693002
Cr-Commit-Position: refs/heads/master@{#15984}

[modify] https://crrev.com/abf1752ff44481cff17b5bfada8e18bf537fe27d/webrtc/common_audio/signal_processing/levinson_durbin.c

ClusterFuzz has detected this issue as fixed in range 443187:443210.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5324054639935488

Fuzzer: libfuzzer_neteq_rtp_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  WebRtcSpl_LevinsonDurbin
  webrtc::Expand::AnalyzeSignal
  webrtc::Expand::Process
  
Sanitizer: undefined (UBSAN)

Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_ubsan&range=443187:443210

Minimized Testcase (1.95 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95kcYxHuzucS00Qok4y43IRk45m5c37tPjQWnj_EfLOtZ117ROCSQNrLgc2TkE3C_zrFI0Wy8TOw4TYVnXju3PpN0Rw9GWfYEH6rmjFvum6atcrm8UD5I9z9-DPzrU7TXVv4JY6t1rxiqe7K4CXJDscBOhXHg?testcase_id=5324054639935488

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.

ClusterFuzz testcase 5324054639935488 is verified as fixed, so closing issue.

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