Predator could not provide any possible suspects.
Using the CL search for the file, “box_reader.cc” assigning to concern owner.

Suspecting Commit# https://chromium.googlesource.com/chromium/src/+/f7b33b92746f6d3758c66048ea3106283279668b

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


Thank You...

Automatically applying components based on crash stacktrace and information from OWNERS files.

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

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4b28187dab3fec3bfe98a366ea5d07c1d9b110b4

commit 4b28187dab3fec3bfe98a366ea5d07c1d9b110b4
Author: Dan Sanders <sandersd@chromium.org>
Date: Tue Oct 31 23:35:50 2017

[media] BoxReader: Cap |buf_size_| to |box_size_|.

Before this change, BoxReader could read syntax elements outside of a
box in cases where the MP4 was invalid. This isn't a security concern,
since the reads were still bounded by the buffer size, but it did make
it hard to interpret the later failures.

This CL shrinks |buf_size_| to match |box_size_| when the box size is
read. OOB reads will now result in Parse failures immediately.

Bug:  779321 
Change-Id: I54be6ba3815d1502233b5e95d099ce9d9a54b3cc
Reviewed-on: https://chromium-review.googlesource.com/747080
Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
Commit-Queue: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513000}
[modify] https://crrev.com/4b28187dab3fec3bfe98a366ea5d07c1d9b110b4/media/formats/mp4/box_reader.cc
[modify] https://crrev.com/4b28187dab3fec3bfe98a366ea5d07c1d9b110b4/media/formats/mp4/box_reader.h
[modify] https://crrev.com/4b28187dab3fec3bfe98a366ea5d07c1d9b110b4/media/formats/mp4/box_reader_unittest.cc

ClusterFuzz has detected this issue as fixed in range 512996:513028.

Detailed report: https://clusterfuzz.com/testcase?key=4559812687036416

Fuzzer: libFuzzer_mediasource_MP4_FLAC_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  pos_ == box_size_ in box_reader.cc
  media::mp4::BoxReader::ScanChildren
  media::mp4::AudioSampleEntry::Parse
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=512266:512309
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=512996:513028

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4559812687036416

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 4559812687036416 is verified as fixed, so closing issue as verified.

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