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Issue metadata

Status: Duplicate
Merged: issue 855905
Owner:
Closed: Jun 2018
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 1
Type: Bug



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Null-dereference READ in blink::Node::GetLayoutObject

Project Member Reported by ClusterFuzz, Jun 21 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5681606837403648

Fuzzer: marty_html_twiddler
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::Node::GetLayoutObject
  blink::LayoutTextFragment::GetFirstLetterPart
  blink::AssociatedLayoutObjectOf
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=569234:569235

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5681606837403648

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jun 21 2018

Components: Blink>DOM Blink>Layout
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 21 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/+/5c9711672411542ead18a35c95dec6a48947f077 ([LayoutNG] Adapt accessibility module to LayoutNG).

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, Jun 25 2018

Mergedinto: 855905
Status: Duplicate (was: Assigned)
The root cause is as same as  issue 855905 .
Project Member

Comment 4 by ClusterFuzz, Jun 27 2018

ClusterFuzz has detected this issue as fixed in range 570463:570464.

Detailed report: https://clusterfuzz.com/testcase?key=5681606837403648

Fuzzer: marty_html_twiddler
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::Node::GetLayoutObject
  blink::LayoutTextFragment::GetFirstLetterPart
  blink::AssociatedLayoutObjectOf
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=569234:569235
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=570463:570464

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5681606837403648

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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