Predator and CL did not provide any possible suspects.
Using Code Search for the file, "FrameFetchContext.cpp" assigning to the concern owner.
Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/d1b870f2cf4bece0726cc8a89aa36f2fe38d73ad

@yutak -- 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 480008:480025.

Detailed report: https://clusterfuzz.com/testcase?key=5407888469393408

Fuzzer: jsbell_indexeddb
Job Type: windows_asan_chrome
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x00000120
Crash State:
  blink::FrameFetchContext::DispatchDidFail
  blink::ResourceFetcher::HandleLoaderError
  blink::ResourceLoader::HandleError
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=479315:479340
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=480008:480025

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5407888469393408


Additional requirements: Requires Gestures

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 5407888469393408 is verified as fixed, so closing issue.

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