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

Dominic,

AXTree fuzzer related.

ClusterFuzz has detected this issue as fixed in range 421597:421671.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4574653542825984

Fuzzer: libfuzzer_ax_tree_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  HasChangedNode
  DestroySubtree
  ui::AXTree::UpdateNode
  
Recommended Security Severity: Medium

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_msan&range=418231:418327
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_msan&range=421597:421671

Minimized Testcase (0.07 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv978Qx6ysKXr2RAiF6ibyOkLbXR6Clf7chR18V4jClp3pSNJFQ1b1-7US8C_snZuFPBkpPyyH0BOtXC2mSyxXZmndRMVYrCvibzIzUZvnxsSwG-GxA_s_uMJL88n6vcCoz8CVvajIbuzdZg_D5u91HMyAFaFnw?testcase_id=4574653542825984
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See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md 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