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Issue metadata

Status: Verified
Owner: ----
Closed: May 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Null-dereference READ in blink::OpenTypeVerticalData::GetVerticalTranslationsForGlyphs

Project Member Reported by ClusterFuzz, Apr 30 2018

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=5155911568719872

Fuzzer: ifratric-browserfuzzer-v3
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::OpenTypeVerticalData::GetVerticalTranslationsForGlyphs
  blink::HarfBuzzGetGlyphVerticalOrigin
  hb_font_t::get_glyph_v_origin_with_fallback
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=554670:554671

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5155911568719872

Issue filed automatically.

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

Comment 1 by ClusterFuzz, Apr 30 2018

Components: Internals>Core Internals>Media
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.
Project Member

Comment 2 by ClusterFuzz, Apr 30 2018

Labels: Test-Predator-Auto-Owner
Owner: blink-w3c-test-autoroller@chromium.org
Status: Assigned (was: Untriaged)
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/0903fe19af33f53932430736caaee9fcfb248968 (Import wpt@43dd25c888da9b903cedeb3bb5b8a832b2d51b97).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
Components: -Internals>Media Blink>Fonts
Labels: Test-Predator-Wrong-Components

Comment 4 by e...@chromium.org, Apr 30 2018

Cc: drott@chromium.org
Components: -Internals>Core
Labels: -Pri-1 Pri-2
Owner: ----
Status: Available (was: Assigned)
Not a security issue and no reports in the wild, lowering priority.

Comment 5 by drott@chromium.org, May 3 2018

Probably identical to the not reproducible  issue 820821 .
Project Member

Comment 6 by ClusterFuzz, May 6 2018

ClusterFuzz has detected this issue as fixed in range 556337:556338.

Detailed report: https://clusterfuzz.com/testcase?key=5155911568719872

Fuzzer: ifratric-browserfuzzer-v3
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::OpenTypeVerticalData::GetVerticalTranslationsForGlyphs
  blink::HarfBuzzGetGlyphVerticalOrigin
  hb_font_t::get_glyph_v_origin_with_fallback
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=554670:554671
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_chrome&range=556337:556338

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5155911568719872

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 7 by ClusterFuzz, May 6 2018

Labels: ClusterFuzz-Verified
Status: Verified (was: Available)
ClusterFuzz testcase 5155911568719872 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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