Detailed report: https://clusterfuzz.com/testcase?key=6309845724692480

Fuzzer: metzman_webgl_mutator
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x0000000000d4
Crash State:
  es2::TextureCubeMap::isCubeComplete
  gl::GenerateMipmap
  gpu::gles2::GLES2DecoderImpl::DoGenerateMipmap
  
Sanitizer: memory (MSAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6309845724692480

Issue filed automatically.

See https://www.chromium.org/developers/testing/memorysanitizer#TOC-Reproducing-ClusterFuzz-Bugs for instructions to reproduce this bug locally.