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Issue metadata

Status: Verified
Owner: ----
Closed: Jun 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug
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Null-dereference READ in blink::AXRange::AXRange

Project Member Reported by ClusterFuzz, Jun 22 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6089808112517120

Fuzzer: mbarbella_js_mutation_layout
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::AXRange::AXRange
  blink::WebAXObject::GetWordBoundaries
  content::BlinkAXTreeSource::SerializeNode
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=569299:569307

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6089808112517120

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jun 22 2018

Components: Blink>Accessibility Blink>Internals>Modularization
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 22 2018

Cc: nek...@chromium.org suproteem@chromium.org
Labels: Test-Predator-Auto-CC
Automatically adding ccs based on suspected regression changelists:

Added an internal mapping from roles to UI Automation control types by suproteem@chromium.org - https://chromium.googlesource.com/chromium/src/+/e62110dc119e9a19be72a57c9ce567795b5f5636

Added ability to handle ignored and mock / virtual objects to AXPosition by nektar@chromium.org - https://chromium.googlesource.com/chromium/src/+/255c6d0fb339bdee0faf354b955f7a3a914b2f86

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label.
Project Member

Comment 3 by ClusterFuzz, Jun 25 2018

ClusterFuzz has detected this issue as fixed in range 569940:569941.

Detailed report: https://clusterfuzz.com/testcase?key=6089808112517120

Fuzzer: mbarbella_js_mutation_layout
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::AXRange::AXRange
  blink::WebAXObject::GetWordBoundaries
  content::BlinkAXTreeSource::SerializeNode
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=569299:569307
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=569940:569941

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6089808112517120

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, Jun 25 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Untriaged)
ClusterFuzz testcase 6089808112517120 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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