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Issue metadata

Status: WontFix
Owner:
Closed: Jan 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Bad Lock in media::ChunkDemuxerStream::SetEnabled

Project Member Reported by ClusterFuzz, Dec 25 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6041723146076160

Fuzzer: ochang_domfuzzer
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000050
Crash State:
  __GI___pthread_mutex_lock
  base::internal::LockImpl::Lock
  media::ChunkDemuxerStream::SetEnabled
  
Sanitizer: thread (TSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=518240:518474

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6041723146076160

Additional requirements: Requires HTTP

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.
 
Project Member

Comment 1 by ClusterFuzz, Dec 25 2017

Components: Internals>Core
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.
Cc: kkaluri@chromium.org
Labels: M-64 Test-Predator-Wrong
Owner: bcwh...@chromium.org
Status: Assigned (was: Untriaged)
Predator and CL could not provide any possible suspects.
Using Code Search for the file, "lock_impl_posix.cc" assigning to the concern owner who might be related.

Suspect CL: https://chromium.googlesource.com/chromium/src/+/62ae282c378bd6658c877bf3a9e911e41764ec32

bcwhite@ -- Could you please look into the issue, kindly re-assign if this is not related to your changes.


Thank You.
Owner: p...@chromium.org
Summary: Bad Lock in media::ChunkDemuxerStream::SetEnabled (was: Null-dereference READ in __GI___pthread_mutex_lock)
kkaluri, If lock gets a SEGV, it's not the lock-code's fault but the caller.

Looking through the CL range, there are several media/ changes.  The first one seems an option crashes in tests...

https://chromium-review.googlesource.com/783640
audio: Change FakeAudioOutputStream to derive from MuteableAudioOutputStream.


Project Member

Comment 4 by ClusterFuzz, Jan 27 2018

Status: WontFix (was: Assigned)
ClusterFuzz testcase 6041723146076160 is flaky and no longer crashes, so closing issue.

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

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