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Issue 739212 link

Starred by 1 user
Status: WontFix
Owner:
ccameron@chromium.org
Closed: Aug 2017
Cc:
█ msrchandra@chromium.org
mac-bugs-priority@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 1
Type: Bug



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Null-dereference READ in content::SoftwareOutputDeviceMac::EndPaint

Project Member Reported by ClusterFuzz, Jul 4 2017 
Detailed report: https://clusterfuzz.com/testcase?key=6004027740651520

Fuzzer: ipc_fuzzer_gen
Job Type: mac_asan_chrome_ipc
Platform Id: mac

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  content::SoftwareOutputDeviceMac::EndPaint
  cc::SoftwareRenderer::FinishDrawingFrame
  cc::DirectRenderer::DrawFrame
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_chrome_ipc&range=469862:469889

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6004027740651520


Issue filed automatically.

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

Comment 1 by msrchandra@chromium.org, Jul 5 2017

Cc: msrchandra@chromium.org
Components: Internals>Core
Labels: M-61 Test-Predator-Correct-CLs
Owner: ccameron@chromium.org
Status: Assigned (was: Untriaged)
Assigning to concern owner from Predator results --
The result is a list of CLs that change the crashed files. 

Author: ccameron
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/469d0548dfb4c3304c03571ba3f0f1a9bc58e2a4
Time: Sat May 06 19:15:44 2017
Lines 176 of file software_output_device_mac.mm which potentially caused crash are changed in this cl (frame #1, "content::SoftwareOutputDeviceMac::EndPaint").
Minimum distance from crash line to modified line: 0. (file: software_output_device_mac.mm, crashed on: 176, modified: 176).

@ccameron -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.
Project Member

Comment 2 by ClusterFuzz, Aug 4 2017

Status: WontFix (was: Assigned)
ClusterFuzz testcase 6004027740651520 is flaky and no longer reproduces, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
►

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