This is a serious security regression. If you are not able to fix this quickly, please revert the change that introduced it.

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

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

mstensho@, this crash might come from this commit: https://chromium.googlesource.com/chromium/src/+/b71ac55bffca1c376d6ed4e540194436daccfbd1

I wonder if you can take a look.

The bad commit has been reverted, and I've verified that this test used to, but no longer crashes.

ClusterFuzz has detected this issue as fixed in range 497789:497807.

Detailed report: https://clusterfuzz.com/testcase?key=5222949601935360

Fuzzer: marty_html_twiddler
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x21b1c282c088
Crash State:
  Bad-cast to blink::LayoutBox from blink::LayoutInline
  blink::LayoutBox::SplitAnonymousBoxesAroundChild
  blink::LayoutBlock::AddChildBeforeDescendant
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=497434:497443
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=497789:497807

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5222949601935360

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.

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