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Issue metadata

Status: Duplicate
Merged: issue 813342
Owner:
Closed: Feb 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug

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=4766548229881856

Fuzzer: miaubiz_svg_fuzzer
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::LowestCommonAncestor
  blink::ConversionContext::SwitchToClip
  Convert
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=537453:537464

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4766548229881856

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.
Under-invalidation of LayoutSVGForeignObject element.
Components: -Blink>Paint Blink>Paint>Invalidation
Labels: -Pri-1 Pri-2
Owner: wangxianzhu@chromium.org
Status: Assigned (was: Untriaged)
Null reads are not P1 unless they generate crashes in the wild.
Blocking: 771643
Mergedinto: 813342
Status: Duplicate (was: Assigned)
Project Member

Comment 6 by ClusterFuzz, Feb 22 2018

ClusterFuzz has detected this issue as fixed in range 538200:538202.

Detailed report: https://clusterfuzz.com/testcase?key=4766548229881856

Fuzzer: miaubiz_svg_fuzzer
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::LowestCommonAncestor
  blink::ConversionContext::SwitchToClip
  Convert
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=537453:537464
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=538200:538202

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4766548229881856

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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