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Issue 836934 link

Starred by 2 users

Issue metadata

Status: Verified
Owner: ----
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug-Regression

Blocked on:
issue 837091



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Null-dereference READ in blink::ComparePositions

Project Member Reported by ClusterFuzz, Apr 25 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5669470606196736

Fuzzer: bj_broddelwerk
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::ComparePositions
  blink::SelectionTemplate<blink::EditingAlgorithm<blink::FlatTreeTraversal> > bli
  blink::SelectionAdjuster::AdjustSelectionToAvoidCrossingEditingBoundaries
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=553517:553519

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5669470606196736

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Apr 25 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.
Cc: brajkumar@chromium.org
Labels: -Type-Bug M-68 Test-Predator-Wrong Type-Bug-Regression
Owner: futhark@chromium.org
Status: Assigned (was: Untriaged)
> Predator was unable to identify any culprit changelists for this test case. 

> This issue looks similar to  bug 827897 , hence assigning to futhark@ for more updates.

Thanks!
Blockedon: 837091
Cc: futhark@chromium.org
Labels: -Pri-1 Pri-2
Owner: ----
Status: Available (was: Assigned)
Project Member

Comment 4 by ClusterFuzz, May 25 2018

ClusterFuzz has detected this issue as fixed in range 561613:561616.

Detailed report: https://clusterfuzz.com/testcase?key=5669470606196736

Fuzzer: bj_broddelwerk
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::ComparePositions
  blink::SelectionTemplate<blink::EditingAlgorithm<blink::FlatTreeTraversal> > bli
  blink::SelectionAdjuster::AdjustSelectionToAvoidCrossingEditingBoundaries
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=553517:553519
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=561613:561616

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5669470606196736

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 5 by ClusterFuzz, May 25 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Available)
ClusterFuzz testcase 5669470606196736 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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