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

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Assigning to this week's V8 CF sheriff.

ClusterFuzz has detected this issue as fixed in range 588465:588466.

Detailed report: https://clusterfuzz.com/testcase?key=5877660912451584

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  v8::internal::Simulator::FPCompare
  v8::internal::Simulator::ExecuteInstruction
  v8::internal::Simulator::Run
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=582653:582655
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=588465:588466

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5877660912451584

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.

ClusterFuzz testcase 5877660912451584 is verified as fixed, so closing issue as verified.

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

Looks like https://chromium-review.googlesource.com/1196517 fixed this - should it be considered for an M70 merge?

This bug requires manual review: We are only 12 days from stable.
Please contact the milestone owner if you have questions.
Owners: benmason@(Android), kariahda@(iOS), geohsu@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Assuming no security impact as a simulator bug, please shout if that's not the case.

This seems a fairly large change. Why is this required for M70 if it's a simulator bug?

Fixing labels

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

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot