Predator and CL could not provide any possible suspects.
Using the code search for the file, “Framebuffer.cpp” assigning to concern owner from GIT blame.
Suspecting Commit#
https://chromium.googlesource.com/angle/angle.git/+/05b35b210ef3dcdf7e3260d192ce51b602b6f3a7
@jmadill  -- Could you please look into this issue, kindly reassign if it has nothing to do with your changes.
Thank You.

I'm the right owner for this. Will look into it.

ClusterFuzz has detected this issue as fixed in range 507701:507727.

Detailed report: https://clusterfuzz.com/testcase?key=5361945443303424

Fuzzer: libFuzzer_gpu_angle_passthrough_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  depthStencil.stencilBackMask == depthStencil.stencilMask
  gl::Framebuffer::partialClearNeedsInit
  gl::Framebuffer::clear
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=506896:506932
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=507701:507727

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5361945443303424

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.

ClusterFuzz testcase 5361945443303424 is verified as fixed, so closing issue as verified.

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