xguest: firefox - execmem

[Dominick Grift]

On Tue, Aug 18, 2009 at 11:54:24AM +0200, Christoph A. wrote:
> On 18.08.2009 11:11, Dominick Grift wrote:
> >> type=AVC msg=audit(1250580934.287:24730): avc: denied { execmem } for
> >> pid=4845 comm="firefox" scontext=xguest_u:xguest_r:mozilla_t:s0
> >> tcontext=xguest_u:xguest_r:mozilla_t:s0 tclass=process
> > 
> > I have a feeling that this is due to a plugin that i not run in the nsplugin_t domain, but i might be wrong.
> > Can you confirm or deny that?
> 
> flash-plugin is not (yet) installed for xguest
> 
> other installed plugins:
> 
> ls /usr/lib/mozilla/plugins
> librhythmbox-itms-detection-plugin.so  libtotem-cone-plugin.so
> libtotem-gmp-plugin.so  libtotem-mully-plugin.so
> libtotem-narrowspace-plugin.so
> 
> 
> > Afaik mozilla does not require { execmem }, but many of those crappy plugins do ( for example flash-plugin ).
> > I certain configurations those plugins do not get run in the designated nsplugin_t domain.
> > 
> > In that case firefox runs them.
> > 
> > I am not sure whether mozilla_t domain transitions to nsplugin_t at all.
> > 
> > In practice i believe it does not matter all that much what needs it. You can allow or (silently) deny it.
> 
> Silent deny would mean don't use firefox (because it crashes
> immediately after I start it, if execmem is not allowed).
> 
> Does this imply that it has something to do with firefox rather than a
> specific plugin, or are all plugins loaded at startup?

Good question. I think it implies it has something to do with firefox.
i guess you will have to allow it. 

> 
> 
> > You can use audit2allow to create an add-on to the mozilla_t domain.
> I prefer to get it fixed upstream (it it is a bug) ;)
> 
> thanks,
> Christoph
> 
> 
> 


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