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

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Message-ID: <CAB9W1A2nTN2DJ699BXL_r_aXCk-O9-KrTLSi731isQWpPUmkwg@mail.gmail.com>
Date:	Fri, 9 Jan 2015 08:06:49 -0500
From:	Stephen Smalley <stephen.smalley@...il.com>
To:	Paul Moore <pmoore@...hat.com>
Cc:	Dave Jones <davej@...emonkey.org.uk>,
	selinux <selinux@...ho.nsa.gov>,
	James Morris <james.l.morris@...cle.com>,
	Stephen Smalley <sds@...ch.ncsc.mil>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: noisy selinux messages on tmpfs mount.

We already reduced that message to KERN_DEBUG.  Is that not sufficient?

On Thu, Jan 8, 2015 at 2:39 PM, Paul Moore <pmoore@...hat.com> wrote:
> On Thursday, January 08, 2015 02:34:57 PM Paul Moore wrote:
>> 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.
>
> [NOTE: adding the SELinux list to the CC line.]
>
> --
> paul moore
> security @ redhat
>
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