To my understanding this is quite an open issue, and it's hard to find a company that would want to risk it in court. ZFS on Linux project currently distributes

To my understanding this is quite an open issue, and it's hard to find a company that would want to risk it in court. ZFS on Linux project currently distributes the modules as source, and they are built for particular kernel locally in any machine that needs the modules. This is the same approach as GPU vendors do with their closed source graphics drivers.