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Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/67c8c7456c0c691da8802a0361486ac5e2187fbc (cc: Fix a bunch of scaling issues with oop raster.).

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This is a serious security regression. If you are not able to fix this quickly, please revert the change that introduced it.

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ceacc10a9202c5ef15fdbd6aa5d77e07519fa688

commit ceacc10a9202c5ef15fdbd6aa5d77e07519fa688
Author: Khushal <khushalsagar@chromium.org>
Date: Fri Jun 01 17:53:53 2018

cc: Fix matrix comparison in PaintShader.

If the matrix doesn't decompose, the return value is not initialized and
shouldn't be compared.

R=enne@chromium.org

Bug:  847089 
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ia1b53a0c0167e16c6d6897bc776282c6d27d8a4e
Reviewed-on: https://chromium-review.googlesource.com/1081932
Reviewed-by: enne <enne@chromium.org>
Commit-Queue: Khushal <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563710}
[modify] https://crrev.com/ceacc10a9202c5ef15fdbd6aa5d77e07519fa688/cc/paint/paint_shader.cc

ClusterFuzz has detected this issue as fixed in range 563707:563714.

Detailed report: https://clusterfuzz.com/testcase?key=5111527758364672

Fuzzer: libFuzzer_paint_op_buffer_eq_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  cc::PaintOp::AreSkMatricesEqual
  cc::CompareMatrices
  cc::PaintShader::operator==
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=559165:559191
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=563707:563714

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5111527758364672

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

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5111527758364672 is verified as fixed, so closing issue as verified.

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

ClusterFuzz has detected this issue as fixed in range 563707:563714.

Detailed report: https://clusterfuzz.com/testcase?key=5111527758364672

Fuzzer: libFuzzer_paint_op_buffer_eq_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  cc::PaintOp::AreSkMatricesEqual
  cc::CompareMatrices
  cc::PaintShader::operator==
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=559165:559191
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=563707:563714

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5111527758364672

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

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

Approving merge for 68. branch:3440

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

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This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

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This doesn't need a merge. The code this affects is behind an experiment flag that will not be enabled in 68.

Thanks khushalsagar@

This bug has been closed for more than 14 weeks. Removing security view restrictions.

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