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Re: Adding a custom PAM module and selinux



On Sat, 2006-05-27 at 21:40 +0100, Paul Howarth wrote:
> On Sat, 2006-05-27 at 18:54 +0200, Jurgen Kramer wrote:
> > I am trying to add a custom PAM module (pam_poldi.so) to my FC5 system
> > to be able to login using a OpenPGP smartcard. I already changed the
> > security context of /lib/security/pam_poldi.so to match the other pam
> > modules (system_u:object_r:lib_t) but it seems that is not enough. In
> > syslog I still see:
> > 
> > su: PAM unable to dlopen(/lib/security/pam_poldi.so)
> > su: PAM [error: /lib/security/pam_poldi.so: cannot restore segment prot
> > after reloc: Permission denied]
> > 
> > This can propably be fixed with a chcon -t
> > texrel_shlib_t /lib/security/pam_poldi.so
> > 
> > This will probably not survice an selinux update or relabel session.
> > What is the proper way to add the module so it will survice relabels and
> > selinux updates?
> 
> This should do it:
> 
> # semanage fcontext -a -t textrel_shlib_t -f
> -- /lib/security/pam_poldi.so
> 
> (that's all one long line)
> 
> You could test it by changing the context back to lib_t and then doing:
> 
> # restorecon -v /lib/security/pam_poldi.so
> 
> which should set it back to textrel_shlib_t.
Unfortunately that did not do it :( 

I still get:

su: PAM unable to dlopen(/lib/security/pam_poldi.so)
su: PAM [error: /lib/security/pam_poldi.so: cannot restore segment prot
after reloc: Permission denied]
su: PAM adding faulty module: /lib/security/pam_poldi.so

Any ideas?

Thanks though,
Jurgen


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