I don't think it is a further restriction on the rights you have. Those rights extend to the code you have, they are only terminating the business relationship

I don't think it is a further restriction on the rights you have. Those rights extend to the code you have, they are only terminating the business relationship going forward. Not a lawyer, so maybe someone else more knowledgeable about the space will expand on this. I imagine that RH/IBM has had lawyers look into this before the policy was announced.