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Issue 799302 link

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Issue metadata

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



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Null-dereference READ in blink::LayoutObject::Container

Project Member Reported by ClusterFuzz, Jan 4 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6636937497804800

Fuzzer: mbarbella_webcomponents
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::LayoutObject::Container
  blink::LayoutBox::LocationContainer
  blink::LayoutBox::OffsetFromContainer
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=526971:526973

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6636937497804800

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Jan 5 2018

Components: 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.
Cc: brajkumar@chromium.org
Labels: -Type-Bug M-65 Test-Predator-Wrong Type-Bug-Regression
Owner: chrishtr@chromium.org
Status: Assigned (was: Untriaged)
Predator and CL could not provide any possible suspects.

Using Code Search for the file, "LayoutObject.cpp" and observed there was some recent changes for the below file.

Suspect CL: https://chromium.googlesource.com/chromium/src/+/0a000da0e2e2e73eee4041e9ec1247edea576930

chrishtr@ -- 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!
Project Member

Comment 3 by ClusterFuzz, Jan 5 2018

ClusterFuzz has detected this issue as fixed in range 527016:527020.

Detailed report: https://clusterfuzz.com/testcase?key=6636937497804800

Fuzzer: mbarbella_webcomponents
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::LayoutObject::Container
  blink::LayoutBox::LocationContainer
  blink::LayoutBox::OffsetFromContainer
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=526971:526973
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=527016:527020

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6636937497804800

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, Jan 5 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 6636937497804800 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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