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Issue 866615 link

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Issue metadata

Status: Verified
Owner:
Last visit > 30 days ago
Closed: Jul 25
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in blink::HTMLCanvasElement::CopiedImage

Project Member Reported by ClusterFuzz, Jul 23

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5485510206947328

Fuzzer: ochang_domfuzzer
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::HTMLCanvasElement::CopiedImage
  blink::WriteImageNodeToClipboard
  blink::WebLocalFrameImpl::CopyImageAt
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=562303:562305

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5485510206947328

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jul 23

Components: Blink>Canvas Blink>Editing
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, Jul 23

Labels: Test-Predator-Auto-Owner
Owner: junov@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/d58a24353033b9213b3076bb7c603519f76dc852 (Use CanvasResource as a vehicle for OffscreenCanvas placeholder frames).

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.
Components: -Blink>Editing
Remove Blink>Editing, since this is caused by copy image from off-screen canvas.

Project Member

Comment 4 by ClusterFuzz, Jul 25

ClusterFuzz has detected this issue as fixed in range 577565:577567.

Detailed report: https://clusterfuzz.com/testcase?key=5485510206947328

Fuzzer: ochang_domfuzzer
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::HTMLCanvasElement::CopiedImage
  blink::WriteImageNodeToClipboard
  blink::WebLocalFrameImpl::CopyImageAt
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=562303:562305
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=577565:577567

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5485510206947328

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 5 by ClusterFuzz, Jul 25

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5485510206947328 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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