Re: RFC - Display context information using iproute2 ss utility

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On Friday, February 07, 2014 06:03:25 PM Ole Kliemann wrote:
> On Fri, Feb 07, 2014 at 04:22:37PM +0000, Richard Haines wrote:
> > I've been patching the iproute2 "ss" utility to display the SELinux
> > security contexts for process and sockets, however I'm not sure
> > whether the socket contexts are correct (I expected most to show
> > system_u:object_r:....).
> > 
> > I'm taking the socket contexts from /proc/PID/fd as was mentioned in
> > a previous email regarding socket contexts - is this correct ??
> 
> I was doing it that way and it seemed to work ...

What you will see is the label of the socket's associated inode, not the 
actual socket label.

> ... I could even change the context using 'chcon /proc/PID/fd'.

Yes, you really shouldn't do that.  I've actually got a patch kicking around 
that I haven't had the time to test which will actually prevent you from 
changing a socket's inode label. 

> But I have no idea whether it is supposed to be a reliable way or
> any other methods exist. The whole sockfs thing kept me rather
> wondering...

It works as far as I know, it just turns out that it isn't quite what you 
think it is :)

-- 
paul moore
www.paul-moore.com

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