This looks similar to 670296. bradnelson@, I wonder if you can take a look.

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

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bradnelson: Uh oh! This issue still open and hasn't been updated in the last 14 days. This is a serious vulnerability, and we want to ensure that there's progress. Could you please leave an update with the current status and any potential blockers?

If you're not the right owner for this issue, could you please remove yourself as soon as possible or help us find the right one?

If the issue is fixed or you can't reproduce it, please close the bug. If you've started working on a fix, please set the status to Started.

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

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

bradnelson: Uh oh! This issue still open and hasn't been updated in the last 28 days. This is a serious vulnerability, and we want to ensure that there's progress. Could you please leave an update with the current status and any potential blockers?

If you're not the right owner for this issue, could you please remove yourself as soon as possible or help us find the right one?

If the issue is fixed or you can't reproduce it, please close the bug. If you've started working on a fix, please set the status to Started.

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

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

Merging into related v2 validator issue.

ClusterFuzz has detected this issue as fixed in range 45077:45078.

Detailed report: https://clusterfuzz.com/testcase?key=6553616086466560

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_v8_arm_dbg
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 4
Crash Address: 0xdd313cb0
Crash State:
  v8::internal::Simulator::DecodeType3
  v8::internal::Simulator::InstructionDecode
  v8::internal::Simulator::CallInternal
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: V8: 37469:37470
Fixed: V8: 45077:45078

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6553616086466560


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

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

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