Quoting Enrico Weigelt, metux IT consult (enrico.weigelt@???):

> wait a second - these grsecurity folks are *selling* kernel patches ?
> how is that compatible w/ the gpl ?

Please explain to me why I may not offer to sell a codebase subject to
GPLv[23] licence terms.

Please note that FSF itself has been selling collections of GNU software
for well over 30 years.