* Pavel Machek <pa...@ucw.cz> wrote:
> > For example, there would be collision with regular user-space mappings,
> > right?
> > Can local unprivileged users use mmap(MAP_FIXED) probing to figure out
> > where
> > the kernel lives?
>
> Local unpriviledged users can probably get your secret bits using cache
> probing
> and jump prediction buffers.
>
> Yes, you don't want to leak the information using mmap(MAP_FIXED), but CPU
> will
> leak it for you, anyway.
Depends on the CPU I think, and CPU vendors are busy trying to mitigate this
angle.
Thanks,
Ingo
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