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Issue 894776 link

Starred by 1 user
Status: Fixed
Owner:
tmathmeyer@chromium.org
Closed: Nov 30
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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CHECK failure: last_packet_dts_ != in ffmpeg_demuxer.cc

Project Member Reported by ClusterFuzz, Oct 12 
Detailed report: https://clusterfuzz.com/testcase?key=5960195268935680

Fuzzer: libFuzzer_media_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  last_packet_dts_ != in ffmpeg_demuxer.cc
  media::FFmpegDemuxerStream::EnqueuePacket
  media::FFmpegDemuxer::OnReadFrameDone
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=585550:585553

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5960195268935680

Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md for more information.
Project Member

Comment 1 by ClusterFuzz, Oct 12

Components: Internals>Core Internals>Media
Labels: Test-Predator-Auto-Components
Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.
Project Member

Comment 2 by ClusterFuzz, Oct 12

Labels: Test-Predator-Auto-Owner
Owner: tmathmeyer@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/d5a6baab5a827dd0d3a87ce445adf4dc30f8fce2 (Seek video track only when it is re-enabled).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Project Member

Comment 3 by bugdroid1@chromium.org, Nov 30 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6416cf38552b4da7c52cb6ce3faef376ba8c5ba3

commit 6416cf38552b4da7c52cb6ce3faef376ba8c5ba3
Author: Ted Meyer <tmathmeyer@chromium.org>
Date: Fri Nov 30 20:10:01 2018

Dont drop packet when last_dts_ is invalid

If the previous packet position and the current match and we fall back
to comparing display timestamps, make sure that we don't drop packets
which never had a display timestamp set.

Bug:  894776 
Change-Id: I5033462642255743cb05cd44ec85312441503f53
Reviewed-on: https://chromium-review.googlesource.com/c/1356310
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Ted Meyer <tmathmeyer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612745}
[modify] https://crrev.com/6416cf38552b4da7c52cb6ce3faef376ba8c5ba3/media/filters/ffmpeg_demuxer.cc

Comment 4 by tmathmeyer@chromium.org, Nov 30

Status: Fixed (was: Assigned)
Project Member

Comment 5 by ClusterFuzz, Dec 1

Labels: -Reproducible Unreproducible
ClusterFuzz testcase 5960195268935680 appears to be flaky, updating reproducibility label.
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