Comment 5 for bug 1619718

Looking at the fsck output, it appears the problem is specific to the subdirectories we're creating. Although the EFI system partition we create for x86 also has subdirectories, that filesystem shows no corruption; but Michael's reproducer script shows that it's the directory inode that's broken:

Starting check/repair pass.
/TOIMG/.
  Bad short file name (.).
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? ^C