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Issue metadata

Status: Verified
Owner: ----
Closed: Apr 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug



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Null-dereference READ in blink::FirstLetterPseudoElement::AttachFirstLetterTextLayoutObjects

Project Member Reported by ClusterFuzz, Dec 13 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5869277071802368

Fuzzer: inferno_twister
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::FirstLetterPseudoElement::AttachFirstLetterTextLayoutObjects
  blink::Element::RebuildLayoutTree
  blink::Element::RebuildLayoutTree
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=508795:508862

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5869277071802368

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Dec 13 2017

Components: Blink>DOM 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: kkaluri@chromium.org
Labels: M-65 Test-Predator-Wrong
Owner: nainar@chromium.org
Status: Assigned (was: Untriaged)
Predator and CL could not provide any possible suspects.

Using the code search for the file, “Element.cpp & ContainerNode.cpp”  assigning to concern owner because of his recent work on suspect CL.
Suspecting Commit# https://chromium.googlesource.com/chromium/src/+/be39eca66962913558c32b74c52da41ef91386b0

nainar@ - Could you please look into this issue and kindly reassign if it has nothing to do with the above changes.

Thank You.

Comment 3 by nainar@chromium.org, Dec 15 2017

Cc: -kkaluri@chromium.org
Owner: kkaluri@chromium.org
This crashes without my CL and crashes in M63 as well. 

Comment 4 by e...@chromium.org, Jan 8 2018

Labels: -Pri-1 Pri-2
Project Member

Comment 5 by ClusterFuzz, Feb 1 2018

Labels: OS-Mac
Project Member

Comment 6 by ClusterFuzz, Apr 5 2018

Labels: OS-Windows
Project Member

Comment 7 by ClusterFuzz, Apr 8 2018

ClusterFuzz has detected this issue as fixed in range 549059:549062.

Detailed report: https://clusterfuzz.com/testcase?key=5869277071802368

Fuzzer: inferno_twister
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::FirstLetterPseudoElement::AttachFirstLetterTextLayoutObjects
  blink::Element::RebuildLayoutTree
  blink::Element::RebuildLayoutTree
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=508795:508862
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=549059:549062

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5869277071802368

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 8 by ClusterFuzz, Apr 8 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 5869277071802368 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
Cc: kkaluri@chromium.org
Owner: ----

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