Reproduces reliable with msan d8 built inside chrome.

Local bisect isolated 215af922ca00c29e44ad474c3ea5281fb2b50c3e (March 8th).

Thanks, taking a look.

Aaaand, this is a dupe.

ClusterFuzz has detected this issue as fixed in range 469626:469632.

Detailed report: https://clusterfuzz.com/testcase?key=6251194845757440

Fuzzer: mbarbella_js_mutation
Job Type: linux_msan_d8
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  void v8::internal::BodyDescriptorBase::IteratePointers<v8::internal::MarkCompact
  v8::internal::MarkCompactCollector::EmptyMarkingDeque
  v8::internal::MarkCompactCollector::RootMarkingVisitor::VisitRootPointers
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_d8&range=459483:459538
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_d8&range=469626:469632

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6251194845757440


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