Re: RFC - Approaches to user-space probes

["Frank Ch. Eigler" <fche@redhat.com>]

Hi -

On Fri, Mar 31, 2006 at 05:25:29PM +0530, Prasanna S Panchamukhi wrote:
> [...]
> > It's pretty clear that writing the dirtied pages to disk is an
> > *undesirable* side-effect, and should be eliminated. [...]
> 
> What would the typical situations where the text section in the
> executable is mapped with 'MAP_SHARED'?

Even if such usage is not typical, if it is legal, it may open a
vulnerability.  Imagine an unprivileged attacker doing just such an
mmap on some key shared library or executable, hoping that someone
else puts user-kprobes in there.

- FChE

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