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Issue 915085 link

Starred by 1 user
Status: Available
Owner: ----
Cc:
csharrison@chromium.org
andruud@chromium.org
kkaluri@chromium.org
metzman@chromium.org
drott@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 1
Type: Bug



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Null-dereference READ in blink::LayoutThemeFontProvider::SystemFont

Project Member Reported by ClusterFuzz, Dec 14 
Detailed report: https://clusterfuzz.com/testcase?key=5732285799989248

Fuzzer: libFuzzer_stylesheet_contents_fuzzer
Fuzz target binary: stylesheet_contents_fuzzer
Job Type: windows_libfuzzer_chrome_asan
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::LayoutThemeFontProvider::SystemFont
  blink::LayoutThemeDefault::SystemFont
  blink::css_shorthand::Font::ParseShorthand
  
Sanitizer: address (ASAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5732285799989248

Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing_on_windows.md for more information.
Project Member

Comment 1 by ClusterFuzz, Dec 14

Components: Blink>CSS 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.
Project Member

Comment 2 by ClusterFuzz, Dec 14

Cc: csharrison@chromium.org
Labels: ClusterFuzz-Auto-CC
Automatically adding ccs based on OWNERS file / target commit history.

If this is incorrect, please add ClusterFuzz-Wrong label.

Comment 3 by kkaluri@chromium.org, Dec 14

Cc: andruud@chromium.org kkaluri@chromium.org
Labels: M-72 Test-Predator-Wrong CF-NeedsTriage
Unable to provide possible suspect using Predator, CL and Code Search.
With reference to the   Issue 894943 , CC'ing the andruud@ for further triage.

Thank You...

Comment 4 Deleted

Comment 5 by metzman@chromium.org, Dec 14 

I think this bug is caused by Windows-specific behavior, since I couldn't repro locally on Linux.

Comment 6 by metzman@chromium.org, Dec 14 

The documentation for reproducing on Windows has been moved to https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md

Comment 7 by e...@chromium.org, Dec 15

Cc: drott@chromium.org
Components: -Blink>CSS -Blink>Layout Blink>Fonts
Status: Available (was: Untriaged)
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