File contexts and how are files labeled?

[Murray McAllister]

Timothy Renner wrote:
> First off, thanks for the answers about finding out the SELinux 
> transactions...  autrace was the way to go....    Now I have a more 
> fundamental problem...  In the file context labels, there are two rules 
> that conflict:
> 
> /sbin/.*       all files   system_u:object_r:bin_t:s0
> 
>       and
> 
> /sbin/mount.mymounter   regular file   system_u:object_r:myfile_exec_t:s0
> 
> The problem though is that the file gets labeled under the blanket 
> /sbin/.* context, rather than the more specific one:
> 
>  > ls -lZ /sbin/mount.mymounter
> lrwxrwxrwx  root root system_u:object_r:bin_t          
> /sbin/mount.mymounter -> /myproject/sbin/mymounter
I tried this on Fedora Rawhide and it worked. I also have your /sbin/* 
rule. Did you run "restorecon /sbin/mount.mymounter" after adding the rule?

I don't know how this works for symbolic links. You might have to add a 
rule (and run restorecon) for /myproject/sbin/mymounter
> 
> Any thoughts on this?  Can someone explain how the file context is 
> derived from the rules?  Is it as simple as whichever matches first?  
> And does anyone know a way around this labeling problem, assuming I 
> cannot remove the /sbin/.* rule, but can only add rules through a policy 
> module.

> Thanks again,
> -Tim
> 
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