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Issue metadata

Status: Duplicate
Merged: issue 832055
Owner:
Closed: Apr 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in blink::DocumentLifecycle::DisallowTransitionScope::DisallowTransitionScope

Project Member Reported by ClusterFuzz, Apr 19 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5015537156096000

Fuzzer: inferno_twister
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000200
Crash State:
  blink::DocumentLifecycle::DisallowTransitionScope::DisallowTransitionScope
  CreatePlainText<blink::EditingAlgorithm<blink::FlatTreeTraversal>
  blink::PlainText
  
Sanitizer: undefined (UBSAN)

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

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5015537156096000

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Apr 19 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.
Project Member

Comment 2 by ClusterFuzz, Apr 19 2018

Components: Blink>DOM 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.

Comment 3 by yosin@chromium.org, Apr 19 2018

Mergedinto: 832055
Status: Duplicate (was: Assigned)
Caused by: <style>* {float:left}</style>

[10784:18668:0419/181256.077:FATAL:text_offset_mapping.cc(155)] Check failed: false. #text "foo"@offsetInAnchor[0]

Minimal HTML to reproduce:
<style>* { float: left; }</style>
<p id="target">foo</p>
<script>
const selection = window.getSelection();
const target = document.getElementById('target');
selection.collapse(target.firstChild, 0);
window.getSelection().modify('extend', 'forward', 'word');
</script>
 

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