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Issue 882728 link

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Issue metadata

Status: Verified
Owner:
Last visit > 30 days ago
Closed: Sep 11
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in blink::PaintPropertyNode<blink::ClipPaintPropertyNode>::Unalias

Project Member Reported by ClusterFuzz, Sep 11

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5367516749365248

Fuzzer: ifratric-browserfuzzer-v3
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::PaintPropertyNode<blink::ClipPaintPropertyNode>::Unalias
  blink::ConversionContext::SwitchToClip
  SwitchToChunkState
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=590051:590052

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5367516749365248

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Sep 11

Components: Blink>Paint
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, Sep 11

Labels: Test-Predator-Auto-Owner
Owner: trchen@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/bb7972c1f8d03235a76020e91fecd52a5463de0f ([Blink/SPv175+] Change DCHECK(chunk clip escaped layer clip) to a DLOG).

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, Sep 11

ClusterFuzz has detected this issue as fixed in range 590110:590114.

Detailed report: https://clusterfuzz.com/testcase?key=5367516749365248

Fuzzer: ifratric-browserfuzzer-v3
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::PaintPropertyNode<blink::ClipPaintPropertyNode>::Unalias
  blink::ConversionContext::SwitchToClip
  SwitchToChunkState
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=590051:590052
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=590110:590114

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5367516749365248

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, Sep 11

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5367516749365248 is verified as fixed, so closing issue as verified.

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

Comment 5 by ClusterFuzz, Sep 11

ClusterFuzz has detected this issue as fixed in range 590110:590114.

Detailed report: https://clusterfuzz.com/testcase?key=5367516749365248

Fuzzer: ifratric-browserfuzzer-v3
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::PaintPropertyNode<blink::ClipPaintPropertyNode>::Unalias
  blink::ConversionContext::SwitchToClip
  SwitchToChunkState
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=590051:590052
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=590110:590114

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5367516749365248

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.

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