On Mon, Nov 4, 2019 at 9:11 AM Mark Rutland <mark.rutland@xxxxxxx> wrote: > Can you please elaborate on _how_ this is incompatible in the commit > message? > > For example, it's not clear to me if you mean that's functionally > incompatible, or if you're trying to remove return-altering gadgets. > > If there's a functional incompatibility, please spell that out a bit > more clearly. Likewise if this is about minimizing the set of places > that can mess with control-flow outside of usual function conventions. Sure, I'll add a better description in v5. In this case, the return address is modified in the kernel stack, which means the changes are ignored with SCS. Sami
