Re: [kernel-hardening] Re: [RFC PATCH 2/2] mm: restrict access to /proc/slabinfo

[Pekka Enberg]

On Mon, Sep 19, 2011 at 9:55 PM, Vasiliy Kulikov <segoon@xxxxxxxxxxxx> wrote:
> Oh, we also have perf...  Given these are separate interfaces, I think
> slab oriented restriction makes more sense.
>
> So, now we have:
>
> /proc/slabinfo
> /sys/kernel/slab
> /proc/meminfo
> 'perf kmem' - not sure what specific files should be guarded

I don't think you can close down 'perf kmem' per se. You need to make
sure the attacker is not able to use perf tracing (of which 'perf kmem' is
a subset).

                       Pekka
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