Looks like this crash is inside FFMPEG. +tguilbert, dalecurtis, can you take a look / retriage please?

I will take a look

tguilbert: Uh oh! This issue still open and hasn't been updated in the last 14 days. This is a serious vulnerability, and we want to ensure that there's progress. Could you please leave an update with the current status and any potential blockers?

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tguilbert: Uh oh! This issue still open and hasn't been updated in the last 28 days. This is a serious vulnerability, and we want to ensure that there's progress. Could you please leave an update with the current status and any potential blockers?

If you're not the right owner for this issue, could you please remove yourself as soon as possible or help us find the right one?

If the issue is fixed or you can't reproduce it, please close the bug. If you've started working on a fix, please set the status to Started.

Thanks for your time! To disable nags, add the Disable-Nags label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/third_party/ffmpeg/+/28a5cdde5c32bcf66715343c10f74e85713f7aaf

commit 28a5cdde5c32bcf66715343c10f74e85713f7aaf
Author: Thomas Guilbert <tguilbert@chromium.org>
Date: Wed Apr 12 00:45:40 2017

avformat/oggparseogm: Check available data before reading global header

Fixes use of uninitialized data

Found-by: Thomas Guilbert <tguilbert@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 170d864d2c508ca8111b1d108e1e964007dab712)

Bug:700673,  700690 ,  701754 

Change-Id: I90795c2fe9e3c2f29f53f7a5f58339c3e7ca05f6
Reviewed-on: https://chromium-review.googlesource.com/475027
Reviewed-by: Matthew Wolenetz <wolenetz@chromium.org>

[modify] https://crrev.com/28a5cdde5c32bcf66715343c10f74e85713f7aaf/libavformat/oggparseogm.c

ClusterFuzz has detected this issue as fixed in range 463886:463918.

Detailed report: https://clusterfuzz.com/testcase?key=5678288229105664

Fuzzer: libfuzzer_media_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  decode_pce
  decode_ga_specific_config
  decode_audio_specific_config
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=413228:413328
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=463886:463918

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv94IIwbSAHnD_n1IL0ARJLV_gcrqCMeQE_K7CboxeL4TwHvwg9-9q2rAyly32b7MiC6Qs7uklkpywEy6DOW4krs5oCftn0WpiGoVW-Y5ju9Sb8-Uja0TLieYGRCqU0UJgHdF6oTaS08_XX_3zp6JVkR0QIiIEPOZKEHU0hV898dg84xIoEfs4RwwvhKAp_2Ym5ppt1rUxDzC2O75HAvWSOwHhTKFCf7PQUr0JuaBD8QzPyMoAHQxu2Y37AusI-YJ-NmbF2MnfWB6XYiVM3biM9ZfgqUxs1PXJVLRuEOsnpYAkM7JrPCIkYyIQIVHB7Nst6Sg-EotD1R1gs4h7yuvWbdm6TDQLR3s9bmkboSWHTJO3nQVCgc?testcase_id=5678288229105664


See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.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 5678288229105664 is verified as fixed, so closing issue.

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

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot