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

capn: Assigning to you, can you please take a look and reassign? Thanks.

ClusterFuzz has detected this issue as fixed in range 509878:509903.

Detailed report: https://clusterfuzz.com/testcase?key=5182276072898560

Fuzzer: libFuzzer_gpu_swiftshader_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Bad-cast
Crash Address: 0x0e7b15e0f000
Crash State:
  Bad-cast to gl::Object from es2::Context
  egl::Display::createContext
  gl::GLContextEGL::Initialize
  
Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=500968:501035
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=509878:509903

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5182276072898560

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md 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