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Issue metadata

Status: Verified
Owner:
Closed: Aug 8
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in void blink::ShapeResult::ComputeGlyphPositions<false>

Project Member Reported by ClusterFuzz, Aug 8

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=4814209830092800

Fuzzer: inferno_twister
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  void blink::ShapeResult::ComputeGlyphPositions<false>
  blink::ShapeResult::InsertRun
  blink::HarfBuzzShaper::CommitGlyphs
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=579681:579682

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4814209830092800

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Aug 8

Components: Platform
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, Aug 8

Labels: Test-Predator-Auto-Owner
Owner: e...@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/a5d5bb89a464f812803f6b5b6a2feb9f656f52eb (Optimize ShapeResult::ComputeGlyphBounds).

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.
Project Member

Comment 3 by ClusterFuzz, Aug 8

ClusterFuzz has detected this issue as fixed in range 581425:581427.

Detailed report: https://clusterfuzz.com/testcase?key=4814209830092800

Fuzzer: inferno_twister
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  void blink::ShapeResult::ComputeGlyphPositions<false>
  blink::ShapeResult::InsertRun
  blink::HarfBuzzShaper::CommitGlyphs
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=579681:579682
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=581425:581427

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4814209830092800

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 4 by ClusterFuzz, Aug 8

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 4814209830092800 is verified as fixed, so closing issue as verified.

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

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