This looks similar to  Issue 710791 , hence assigning it to the concern owner.

dalecurtis@-- Could you please look into this issue, kindly reassign if it has nothing to do with your changes.


Thank You...

Boo, fuzzer worked out a way around the fix I added previously.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/415212d7045bc6c2ed5c58ec46740251c32ea7ce

commit 415212d7045bc6c2ed5c58ec46740251c32ea7ce
Author: Dale Curtis <dalecurtis@chromium.org>
Date: Wed Nov 29 01:10:35 2017

Roll FFmpeg and update FFmpegDemuxer for security fixes.

https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+log/9cb03e5705c1..18c815f81428

$ git log 9cb03e570..18c815f81 --date=short --no-merges --format='%ad %ae %s'
2017-11-28 dalecurtis Update chromium patches README with new patches.
2017-11-28 dalecurtis Free opus extradata before reallocating.
2017-11-28 dalecurtis Don't manipulate duration when it's AV_NOPTS_VALUE.
2017-11-28 dalecurtis Respect AVERROR codes returned by ogg parsers.
2017-11-25 michael avformat/aacdec: Fix leak in adts_aac_read_packet()

Inspection of code reveals that we don't properly ignore invalid codec
parameters when setting up the ffmpeg demuxer, so we will now explicitly
discard streams which don't have a codec detected.

Created with:
  roll-dep src/third_party/ffmpeg

BUG= 788550 , 787803 , 773637 , 787351 
TEST=ubsan/asan no longer fail.

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I87b0482499e41b2c0190ef3852ed81c3e91c4236
Reviewed-on: https://chromium-review.googlesource.com/794844
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Cr-Commit-Position: refs/heads/master@{#519941}
[modify] https://crrev.com/415212d7045bc6c2ed5c58ec46740251c32ea7ce/DEPS
[modify] https://crrev.com/415212d7045bc6c2ed5c58ec46740251c32ea7ce/media/filters/ffmpeg_demuxer.cc

ClusterFuzz has detected this issue as fixed in range 519939:519974.

Detailed report: https://clusterfuzz.com/testcase?key=5340021237481472

Fuzzer: libFuzzer_media_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  vp8_packet
  ogg_packet
  ogg_read_packet
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=395640:395746
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=519939:519974

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5340021237481472

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 5340021237481472 is verified as fixed, so closing issue as verified.

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