1. Free Redistribution
    2. Source Code
    3. Derived Works
    4. Integrity of The Author’s Source Code
    5. No Discrimination Against Persons or Groups
    6. No Discrimination Against Fields of Endeavor
    7. Distribution of License
    8. License Must Not Be Specific to a Product
    9. License Must Not Restrict Other Software
    10. License Must Be Technology-Neutral

Open source has nothing to do with the right to contribute upstream. It's about you being able to use the software how you like and make changes to it and redistribute it.