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

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

aseemgarg - looks like you've done some work recently with arm simulator, could you please take a look, or re-assign as appropriate?  Thanks!

Happening only in the simulator. I am not sure if this really is a high security impact?

Most likely it's a --validate-asm issue.

mstarzinger: 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.

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

If this is simulator only then it's indeed not a security bug.

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

Detailed report: https://clusterfuzz.com/testcase?key=6250588460548096

Fuzzer: mbarbella_js_mutation
Job Type: linux_asan_d8_v8_arm64_dbg
Platform Id: linux

Crash Type: Heap-buffer-overflow WRITE 8
Crash Address: 0x603000013077
Crash State:
  MemoryWrite<double,
  v8::internal::Simulator::LoadStoreHelper
  ExecuteInstruction
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: V8: 39415:39416
Fixed: V8: 45077:45078

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6250588460548096


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.

ClusterFuzz testcase 6250588460548096 is verified as fixed, so closing issue.

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

Yep, has been fixed by switching to new asm.js validator.

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