Detailed report: https://clusterfuzz.com/testcase?key=5020490099064832

Fuzzer: cdiehl_peach
Job Type: linux_ubsan_vptr_chrome
Platform Id: linux

Crash Type: Bus
Crash Address: 0x7efb5a4f2000
Crash State:
  void downsample_3_3<ColorTypeFilter_NUMBER>
  SkMipMap::Build
  SkMipMap::Build
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_chrome&range=508795:508862

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5020490099064832

Issue filed automatically.

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