=== sanity: untouched inode reads ===
stat f00 on A_zero img : OK /mnt/e2z/f00 ino=12 mode=-rw-r--r--
ls A_zero img          :       41
=== case A_zero (neighbor slot zeroed -> memcmp==0 -> suppressed) ===
stat f03 on A_zero     : stat: /mnt/e2z/f03: stat: Bad file descriptor
=== case B x2 (last-in-block slot -> 32 kernel-heap bytes decide) ===
stat f12 on B (vn2)    : stat: /mnt/e2b1/f12: stat: Bad file descriptor
stat f12 on B (vn3)    : stat: /mnt/e2b2/f12: stat: Bad file descriptor
=== case A_nonzero (neighbor slot 0xAA.. -> memcmp!=0 -> EIO) ===
stat f03 on A_nonzero  : stat: /mnt/e2a/f03: stat: Input/output error
=== expected stock panic on umount of the poisoned mount ===