This might be Low. +some people who have touched the top frame; clamy could you please take a look? Maybe you know a better person to take it? Thanks.

Looks like what got reverted in https://chromium-review.googlesource.com/c/chromium/src/+/1089892

So it's already fixed, but handing over to Josh in case he wants to link the fixed re-land to this.

ClusterFuzz has detected this issue as fixed in range 565095:565096.

Detailed report: https://clusterfuzz.com/testcase?key=4586599271366656

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  disk_cache::SimpleEntryImpl::WriteDataInternal
  disk_cache::SimpleEntryImpl::RunNextOperationIfNeeded
  disk_cache::SimpleEntryImpl::WriteData
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=564929:564933
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_chrome&range=565095:565096

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4586599271366656

See https://github.com/google/clusterfuzz-tools 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 4586599271366656 is verified as fixed, so closing issue as verified.

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

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