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Issue 808474 link

Starred by 2 users

Issue metadata

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



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Null-dereference READ in blink::ShapeResult::CreateForTabulationCharacters

Project Member Reported by ClusterFuzz, Feb 2 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5246233363611648

Fuzzer: inferno_twister_c
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000128
Crash State:
  blink::ShapeResult::CreateForTabulationCharacters
  blink::CachingWordShapeIterator::NextForAllowTabs
  blink::CachingWordShapeIterator::Next
  
Sanitizer: thread (TSAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5246233363611648

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Feb 3 2018

Labels: OS-Windows
Cc: pnangunoori@chromium.org
Components: Blink
Labels: M-64 Test-Predator-Wrong
Owner: drott@chromium.org
Status: Assigned (was: Untriaged)
Predator and CL could not provide any possible suspects.
Observed that recent changes are made by drott@ for the files CachingWordShapeIterator.h and SimpleFontData.h

drott@ -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.
Components: -Blink Blink>Fonts

Comment 4 by e...@chromium.org, Feb 6 2018

Status: WontFix (was: Assigned)
 Issue 810653  has been merged into this issue.
Project Member

Comment 6 by ClusterFuzz, Feb 13 2018

Labels: Needs-Feedback
ClusterFuzz testcase 4803755498012672 is still reproducing on tip-of-tree build (trunk).

If this testcase was not reproducible locally or unworkable, ignore this notification and we will file another bug soon with hopefully a better and workable testcase.

Otherwise, if this is not intended to be fixed (e.g. this is an intentional crash), please add ClusterFuzz-Ignore label to prevent future bug filing with similar crash stacktrace.

Comment 7 by drott@chromium.org, Feb 14 2018

Cc: kojii@chromium.org
Any ideas here, Koji?

Comment 8 by kojii@chromium.org, Feb 15 2018

It looks like PrimaryFont() being nullptr.
 Issue 814017  has been merged into this issue.
Cc: brajkumar@chromium.org
 Issue 818494  has been merged into this issue.
Project Member

Comment 11 by ClusterFuzz, Mar 5 2018

Components: Platform
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.

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