Operating Systems have to handle an open-ended number of bad system-calls without crashing.
- Generate random bytes
- Turn off system-level exception handling
- Run the system using the random bytes as input to system calls
- If it crashes, harden the code to handle it
- These are the interfaces where the user of the code enters input and you have to trust them to enter valid input.
- Trust Boundaries have to be tested with as many inputs outside the domain as possible
From Udacity's Software Testing
course Unit 1.