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Issue metadata

Status: WontFix
Owner:
Closed: Jul 27
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Timeout in mediasource_WEBM_OPUS_VP9_pipeline_integration_fuzzer

Project Member Reported by ClusterFuzz, Jul 17

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5349030104924160

Fuzzer: libFuzzer_mediasource_WEBM_OPUS_VP9_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Timeout (exceeds 25 secs)
Crash Address: 
Crash State:
  mediasource_WEBM_OPUS_VP9_pipeline_integration_fuzzer
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=519029:519040

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5349030104924160

Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md for more information.
 
Cc: kkaluri@chromium.org
Components: Internals>Media>Source
Labels: M-68 Test-Predator-Wrong CF-NeedsTriage
Unable to provide possible suspect using Predator, CL and Code Search.
Could someone please look into the issue.

Thank You...

Labels: -Pri-1 Pri-2
Owner: dalecur...@chromium.org
Status: Assigned (was: Untriaged)
Project Member

Comment 4 by ClusterFuzz, Jul 24

Labels: -Reproducible Unreproducible
ClusterFuzz testcase 5349030104924160 appears to be flaky, updating reproducibility label.
Labels: -M-68 M-70
Cc: mmoroz@chromium.org
Status: WontFix (was: Assigned)
Nothing to really do here, there are 12000 frames and my desktop manages ~1000fps, probably bots may be slower at some point. +mmoroz if he'd rather we abort the test for clips beyond a certain duration.
If there is an easy way to reject such inputs, it would be nice, but WontFix is also fine, as this seems to be a fairly rare problem as per crash stats.
I think we can check duration before starting preroll, but if the fuzzer ends up fuzzing something outside of our allowed duration, that's something an external reporter might find. Is that really an okay compromise?
Good point! If you see a potential of finding security bugs that aren't reachable with a constrained duration, then we definitely shouldn't do that. Thanks for clarifying that, Dale!

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