Detailed report: https://clusterfuzz.com/testcase?key=6017126994018304

Fuzzer: inferno_webbot
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Bus
Crash Address: 0x7f8337fe8000
Crash State:
  void downsample_2_3<ColorTypeFilter_NUMBER>
  SkMipMap::Build
  SkMipMap::Build
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=494841:494865

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6017126994018304

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.