Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/2ad785825859b6be6964d484a1d6a5f3f2c2ded5 (MSE: Expand pipeline integration fuzzer mimetype/codec coverage).

If this is incorrect, please remove the owner and apply the Test-Predator-Wrong-CLs label.

This looks like a fault in FFmpeg.
=> Dale, who rolled FFmpeg most recently.

Hmm +mmoroz, is this correct? The error is 1 << 31 can't be represented as an integer type, but that seems wrong? 1 << 31 == 2147483648 which fits in an int?

Derp, max int is 2147483647, not 2147483648, so it needs to be 1u.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7f1b654208478be9851c8b2a2ee2591d88d3b99c

commit 7f1b654208478be9851c8b2a2ee2591d88d3b99c
Author: Dale Curtis <dalecurtis@chromium.org>
Date: Wed Nov 22 03:24:28 2017

Roll src/third_party/ffmpeg/ 168dfaa19..abead8cbc (6 commits)

https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+log/168dfaa19bfd..abead8cbcf89

$ git log 168dfaa19..abead8cbc --date=short --no-merges --format='%ad %ae %s'
2017-11-21 dalecurtis [vorbis] 1 << 31 > int32_t::max(), so use 1u << 31 instead.
2017-11-21 dalecurtis [mov] Increment stsd_count while processing stsd data; avoids leaks.
2017-11-21 dalecurtis Update wrap_bits fix to work with wrap_bits == 63,64.
2017-11-21 dalecurtis Free extradata before reallocating.
2017-11-21 dalecurtis Add mips64el build files based.
2017-11-21 milko.leporis [MIPS] Put mips64el Linux configuration options

BUG= 787347 , 786803 , 786808 , 783459 
TEST=test cases no longer fail.
TBR=tguilbert

Created with:
  roll-dep src/third_party/ffmpeg

Change-Id: I20b262e221d31a6449b9de966d312e14df67b6b9
Reviewed-on: https://chromium-review.googlesource.com/784104
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518523}
[modify] https://crrev.com/7f1b654208478be9851c8b2a2ee2591d88d3b99c/DEPS

ClusterFuzz has detected this issue as fixed in range 518512:518527.

Detailed report: https://clusterfuzz.com/testcase?key=4746431926894592

Fuzzer: libFuzzer_mediasource_WEBM_VORBIS_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Undefined-shift
Crash Address: 
Crash State:
  ff_vorbis_len2vlc
  vorbis_parse_setup_hdr_codebooks
  vorbis_parse_setup_hdr
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=499820:499882
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=518512:518527

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4746431926894592

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 4746431926894592 is verified as fixed, so closing issue as verified.

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