Oh please, not another fork! Forks are the last thing Linux needs. Linux is very versatile as it is and should have no fork just for the sake of GRSecurity. The vast majority of people use "vanilla" Linux (meaning the default Kernel) without any problems, and yet there are many distributions that add the linux-grsec and pax packages available. This is one of the beauty of Linux, there are numerous possibilities for every taste and purpose. Not to mention there are many distros that have default linux-grsec instead of linux, so forking Linux for a package that is easily accessible makes no sense at all.
Who has grsec as default in their kernel? Outside of Alpine from what I understand you have to roll your own kernel as an option as opposed by default.
GrSecurity in upstream would be awesome, and would probably lead to more software being securely designed, such that GrSec wouldn't force it to crash for the safety of the system. Unfortunately this will not happen, because... well, mostly because certain kernel devs are incredibly childish and petty.
I'd say that a kernel fork (at least for such a reason) is impossible. And I don't think that it is a bad thing either...
That's encouraging. That's a great discussion but until the one person with absolute veto power gets involved that's all it'll be is a discussion. Brad and Linus aren't even close to the same page. Grsec's opinion is that security measures need to be taken as a whole piece and Linus thinks some of this and some of that. You I'm sure are already aware of that.