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Issue metadata

Status: Verified
Owner: ----
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 3
Type: Bug



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VisibleSelection can crash on fallback content of OBJECT

Project Member Reported by ClusterFuzz, May 10 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5979280555900928

Fuzzer: attekett_dom_fuzzer
Job Type: linux_cfi_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000010
Crash State:
  chrome
  blink::Node::UpdateDistributionInternal
  blink::ComparePositions
  
Sanitizer: cfi (CFI)

Regressed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=540771:540773

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5979280555900928

Issue filed automatically.

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

Comment 1 by ClusterFuzz, May 10 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 2 by yosin@chromium.org, May 11 2018

Components: -Blink>Editing -Blink>DOM Blink>Editing>Selection
Labels: -Pri-1 Pri-3
Status: Available (was: Untriaged)
Summary: VisibleSelection can crash on fallback content of OBJECT (was: Null-dereference READ in chrome)
Lower to Pri-3 since it is caused by unusual HTML.
Project Member

Comment 3 by ClusterFuzz, May 17 2018

ClusterFuzz has detected this issue as fixed in range 559420:559432.

Detailed report: https://clusterfuzz.com/testcase?key=5979280555900928

Fuzzer: attekett_dom_fuzzer
Job Type: linux_cfi_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000010
Crash State:
  chrome
  blink::Node::UpdateDistributionInternal
  blink::ComparePositions
  
Sanitizer: cfi (CFI)

Regressed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=540771:540773
Fixed: https://clusterfuzz.com/revisions?job=linux_cfi_chrome&range=559420:559432

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5979280555900928

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, May 17 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Available)
ClusterFuzz testcase 5979280555900928 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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