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Issue metadata

Status: Assigned
Owner:
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 3
Type: Bug

Blocked on:
issue 916298



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Integer-overflow in av_add_stable

Project Member Reported by ClusterFuzz, Jun 19 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6300751874490368

Fuzzer: libFuzzer_audio_decoder_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  av_add_stable
  compute_pkt_fields
  parse_packet
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=546308:546319

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6300751874490368

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jun 19 2018

Components: Internals>Media>FFmpeg
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, Jun 19 2018

Cc: mmoroz@chromium.org
Labels: ClusterFuzz-Auto-CC
Automatically adding ccs based on OWNERS file / target commit history.

If this is incorrect, please add ClusterFuzz-Wrong label.
Project Member

Comment 3 by ClusterFuzz, Jun 19 2018

Labels: Test-Predator-Auto-Owner
Owner: mmoroz@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/4b5068a99a84ff2edb34aa0549afc89aa751ccb4 (Add audio_decoder_fuzzer fuzz target.).

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.
Cc: liber...@chromium.org
Owner: hubbe@chromium.org

Comment 5 by hubbe@chromium.org, Jun 20 2018

This doesn't look like a security problem, and can wait until I get back from vacation.

Patch submitted to ffmpeg:
https://patchwork.ffmpeg.org/patch/9740/
Labels: -Pri-2 Pri-3
Not a security issue, so lowering priority.

Cc: hubbe@chromium.org
Owner: chcunningham@chromium.org
Assigning to current ffmpeg roller.
My patch did not get accepted.

Project Member

Comment 9 by ClusterFuzz, Dec 1

Labels: -Reproducible Unreproducible
ClusterFuzz testcase 6300751874490368 appears to be flaky, updating reproducibility label.
Project Member

Comment 10 by ClusterFuzz, Dec 1

Status: WontFix (was: Assigned)
ClusterFuzz testcase 6300751874490368 is flaky and no longer crashes, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
Labels: -Unreproducible Reproducible
Status: Assigned (was: WontFix)
Sorry for the confusion, ClusterFuzz had a tough weekend :)
Project Member

Comment 12 by ClusterFuzz, Dec 12

ClusterFuzz has detected this issue as fixed in range 615699:615711.

Detailed report: https://clusterfuzz.com/testcase?key=6300751874490368

Fuzzer: libFuzzer_audio_decoder_fuzzer
Fuzz target binary: audio_decoder_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  av_add_stable
  compute_pkt_fields
  parse_packet
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=546308:546319
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=615699:615711

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6300751874490368

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

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.
Project Member

Comment 13 by ClusterFuzz, Dec 12

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 6300751874490368 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
Status: Assigned (was: Verified)
Blocking: 916298
Blocking: -916298
Blockedon: 916298

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