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Issue 832242 link

Starred by 1 user
Status: Duplicate
Merged: issue 832261
Owner:
yosin@chromium.org
Closed: Apr 2018
Cc:
editing-dev@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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TextOffsetMapping::ComputeContainigBlock() crashes with position:aboslute

Project Member Reported by ClusterFuzz, Apr 12 2018 
Detailed report: https://clusterfuzz.com/testcase?key=5059303611039744

Fuzzer: bj_broddelwerk
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000010
Crash State:
  blink::PlainText
  blink::TextOffsetMapping::TextOffsetMapping
  blink::TextOffsetMapping::TextOffsetMapping
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=550102:550107

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5059303611039744

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Apr 12 2018

Components: 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, Apr 12 2018

Labels: Test-Predator-Auto-Owner
Owner: yosin@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/1324be868df000cb2e070199ce2d10cd0c5a2706 (Make NextWordPosition() to utilize TextOffsetMapping).

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.

Comment 3 by yosin@chromium.org, Apr 13 2018

Components: Blink>Editing>Selection
Status: Started (was: Assigned)
I'm working now...

Comment 4 by yosin@chromium.org, Apr 13 2018

Components: -Blink>Editing

Comment 5 by yosin@chromium.org, Apr 13 2018

Mergedinto: 832261
Status: Duplicate (was: Started)
Summary: TextOffsetMapping::ComputeContainigBlock() crashes with position:aboslute (was: Null-dereference READ in blink::PlainText)
Minimal reproduce HTML:
<span id="x" style="position:absolute">A A</span>
<script>
const selection = window.getSelection();
selection.collapse(document.getElementById('x').firstChild, 0);
selection.modify('extend', 'forward', 'word')
</script>
►

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