OOM-killer prevention for master kdeinit process

[Lubos Lunak]

On Wednesday 02 August 2006 22:31, Dirk Mueller wrote:
> On Wednesday, 2. August 2006 17:07, Lubos Lunak wrote:
> > >  Now, who's the setuid guru here :)? Is the attached (KDE3) patch ok?
> > > I'd prefer not to have security people going after me.
>
> I would replace the fopen etc stuff with open(). no difference, just less
> stuff to depend on.
>
> What I'm wondering though: is the oom_score adjustment inherited to fork'ed
> childs or is it noninherited?

 Ah, damn, of course it is inherited :(. So the adjustment needs to be reset 
right after forking. Hmm, I'm not sure we want kdeinit to stay setuid for so 
long, so I guess that means another setuid helper. And I suppose that helper 
will need some checks to make sure it cannot be misused? Do we have already 
something similar I could base this on?

> Also, the additional gid's are not dropped

 Does that mean artswrapper is wrong too? I just used that as a base. And I 
don't think I really know what to fix :).

> and the uid dropping is inside an #ifdef (which might not be defined outside
> linux). 

 It is setuid only on Linux, see the Makefile. It could be actually moved 
outside, no harm in doing that.

-- 
Lubos Lunak
KDE developer
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