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Issue 813342 link

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Issue metadata

Status: Verified
Owner:
Closed: Feb 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows
Pri: 1
Type: Bug-Regression

Blocking:
issue 771643



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Null-dereference READ in blink::LowestCommonAncestor

Project Member Reported by ClusterFuzz, Feb 17 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6012752905371648

Fuzzer: attekett_surku_fuzzer
Job Type: windows_asan_chrome
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::LowestCommonAncestor
  blink::ConversionContext::SwitchToClip
  blink::PaintChunksToCcLayer::ConvertInto
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=537450:537464

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6012752905371648

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Feb 17 2018

Components: Blink>Paint
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.
Doesn't repro on Debug linux.
Cc: brajkumar@chromium.org
Labels: -Type-Bug M-66 Test-Predator-Wrong Type-Bug-Regression
Owner: wangxianzhu@chromium.org
Status: Assigned (was: Untriaged)
Predator could not provide any possible suspects.

From the below CL observing some changes related to 'paint' hence suspecting the same
https://chromium.googlesource.com/chromium/src/+log/e282ebc6f0e5852cfc46ee688bae89a78d119270..a1b9c418a0d37f32981e0e928821943b88f79824?pretty=fuller&n=10000

Suspect CL: https://chromium.googlesource.com/chromium/src/+/0a9a5c311a1d3a298f952e495510bd6fe3faa2f6

wangxianzhu@ -- Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Thanks!

Blocking: 771643
Cc: wangxianzhu@chromium.org
 Issue 813347  has been merged into this issue.
Cc: khushals...@chromium.org
 Issue 813533  has been merged into this issue.
Project Member

Comment 7 by ClusterFuzz, Feb 21 2018

Labels: OS-Linux
Project Member

Comment 8 by ClusterFuzz, Feb 22 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5484772525342720 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
Project Member

Comment 9 by ClusterFuzz, Feb 22 2018

ClusterFuzz has detected this issue as fixed in range 538195:538202.

Detailed report: https://clusterfuzz.com/testcase?key=6012752905371648

Fuzzer: attekett_surku_fuzzer
Job Type: windows_asan_chrome
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::LowestCommonAncestor
  blink::ConversionContext::SwitchToClip
  blink::PaintChunksToCcLayer::ConvertInto
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=537450:537464
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=538195:538202

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6012752905371648

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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