[systemd-devel] SELinux type transition rule not working

[Stephen Smalley]

On Fri, 2017-03-03 at 09:36 -0600, Ian Pilcher wrote:
> On 03/02/2017 12:12 AM, Jason Zaman wrote:
> > 
> > On Wed, Mar 01, 2017 at 05:51:01PM -0600, Ian Pilcher wrote:
> > > 
> > > On 03/01/2017 05:28 PM, Ian Pilcher wrote:
> > > > 
> > > > Per Lennart's response, systemd *should* be honoring the file
> > > > context
> > > > rules when creating the directory.  It's almost as if the
> > > > directory is
> > > > being created with the proper context, but something is
> > > > changing it
> > > > after the fact.  I have absolutely no idea what that might be,
> > > > though.
> > 
> > Try using auditd to get details on everything going on in there:
> > auditctl -w /var/run/squoxy -p rwa -k watchsquoxy
> > 
> > then start things up and get everything matching with:
> > ausearch -k watchsquoxy
> 
> And wouldn't you know ... I can't reproduce the behavior
> now.  Sheesh!
> Must be one of these fancy new quantum computers.  (Something about
> rebooting 3 times comes to mind.)
> 
> > 
> > also, not sure if it was just weirdness in your email formatting,
> > but
> > you dont need the ^ at the front of an fcontext:
> > ^/var/run/squoxy
> 
> Does SELinux add an implicit ^ at the beginning of each expression?
> Otherwise, wouldn't /run/squoxy(/.*)? also match
> /foo/run/squoxy?  (Not
> necessarily likely, but ...)

SELinux implicitly anchors the regexes at both ends (^regex$).