linux-kernel - Re: noisy selinux messages on tmpfs mount.

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Message-ID: <3227891.DhTeT4XeAv@sifl>
Date:	Thu, 08 Jan 2015 14:34:57 -0500
From:	Paul Moore <pmoore@...hat.com>
To:	Dave Jones <davej@...emonkey.org.uk>,
	Stephen Smalley <sds@...ch.ncsc.mil>
Cc:	James Morris <james.l.morris@...cle.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: noisy selinux messages on tmpfs mount.

On Thursday, January 08, 2015 02:08:22 PM Dave Jones wrote:
> systemd has started mounting a tmpfs in /run/user/<uid> every time a
> session begins.  So after ssh'ing into a box a number of times, dmesg
> looks like this..
> 
> [...] SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs
> [...] SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs

{snip}

> What's a good solution to stopping this spew ? printk_once doesn't seem like
> a good fit, in case someone is doing different labelling behaviours between
> mounts.
> 
> Could we only print it if the mount is being done with non-default behaviour
> perhaps?

I'm very curious to hear Stephen's opinion on the issue, but I wonder how much 
this would honestly impact us if we removed this message in the case where we 
mount the filesystem with a known labeling behavior.

-- 
paul moore
security @ redhat

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