Predator did not find any possible suspects.
Assigning to the concern owner from CL --
https://chromium.googlesource.com/chromium/src/+log/1a7740c44a6c4d03423c4b5ff7d746e1a1b7363e..b5c9bcd8091d35691e61a939eb2aa8201baf57c8?pretty=fuller

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/80883f862b84159e61a786edc04f5159afcb1267

@mkwst -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 454459:454515.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4541690171097088

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  !source->parentNode() in Document.cpp
  blink::Document::adoptNode
  blink::V8Document::adoptNodeMethodCallback
  
Sanitizer: memory (MSAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_msan_chrome&range=442831:443393
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_msan_chrome&range=454459:454515

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv97popB_9AtrgN--0TT-dSzUdoeWmZ4roqHc2FbH4OY-ztHAzxiG0XMDd6Byaag4PCch3W8bd5B1WOJCwAd0JAw9hFwR6ji8vlXBW2p1A6rETnq1JLmw4thojPf-wGZwkP3r7YNVkTDYa5lm1j3cm3j72i1oO3e4TElkDW08V_2UvnqSTqiqV35Q1Br146rSuQoMgfRk4887tInHhfm_XdJXJRzN-Z1EYgcZ6s24igh_vnDN9w2frx9BZJzKoHQtWgge3NDzLVIDJec4LeDquAcJxyKeh6z0tEA3MwhjXQxR-9cHbufTQmJiX7d_7ae_ZkOIjkNhJ2YKSpmcrsGfqF6JldE-RCeS0nHJ6kozQoIX4F7HgHw?testcase_id=4541690171097088


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 4541690171097088 is verified as fixed, so closing issue.

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