ClusterFuzz is analyzing your testcase. Developers can follow the progress at https://cluster-fuzz.appspot.com/testcase?key=6475395488808960

danakj@, I wonder if you can take a look at this. Thanks.

There are no casts in WebGLProgram::deleteObjectImpl so Idk what this bug is about.. zmo@ maybe you'll see something I don't. I thot maybe this is related to the WGC3D work I did but I'm not seeing it.

ClusterFuzz has detected this issue as fixed in range 429537:429539.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6480097672691712

Fuzzer: inferno_twister
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x06bce7658fb8
Crash State:
  Bad-cast to blink::WebGLObject from invalid vptr
  blink::WebGLProgram::deleteObjectImpl
  blink::WebGLSharedObject::detachContextGroup
  
Recommended Security Severity: High

Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=393772:393773
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=429537:429539

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv97FueGolXrjfHhtY_g8hmUgCNPZWNJh03SIQ-0oHU6jNqPS6Hi0h0JrHikM6WiRtatENRRopAxbl3RQvRH4peJ8zqiGS0DiCmkYjgC20TJsIMbNTQxGl4ybQ-LZpQTAYPyQ--A8fK_apCzhwR8a2EACzKfYrv6KAEw4N-yvS8CSIFt5LjQ?testcase_id=6480097672691712


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 is verified as fixed, closing issue.

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

+awhalley@ for merge review

There were no code changes associated with this ClusterFuzz report and consequently there is nothing to merge.

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