Tentatively assigning to aleventhal for web_ax_object_proxy expertise; can you please help triage this security bug?

Also, it looks like the crash is triggered in a test runner; is it possible that this is not reachable from production code?

Thanks!

ClusterFuzz has detected this issue as fixed in range 479114:479249.

Detailed report: https://clusterfuzz.com/testcase?key=6160302382252032

Fuzzer: ochang_domfuzzer
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: Use-after-poison READ 8
Crash Address: 0x7ef9c4f6c5e0
Crash State:
  void blink::LocalFrameView::ForAllNonThrottledLocalFrameViews<blink::LocalFrameV
  blink::LocalFrameView::UpdateLifecyclePhasesInternal
  blink::WebAXObject::UpdateLayoutAndCheckValidity
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=453200:453220
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=479114:479249

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6160302382252032


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 6160302382252032 is verified as fixed, so closing issue.

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

This bug requires manual review: M61 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid@(ChromeOS), govind@(Desktop)

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

+ awhalley@ (Security TPM) for M61 merge review.

Fix range is in M61, no need for merge.

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