linux-ext4 - Re: ext4_has_free_blocks always checks cap_sys

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Message-ID: <49051BE3.4080807@redhat.com>
Date:	Sun, 26 Oct 2008 20:39:47 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Eric Paris <eparis@...hat.com>
CC:	linux-ext4@...r.kernel.org, selinux@...ho.nsa.gov,
	sds@...ho.nsa.gov, esandeen@...hat.com, tytso@....edu,
	dwalsh@...hat.com, linux-security-module@...r.kernel.org
Subject: Re: ext4_has_free_blocks always checks cap_sys_resource and makes
 SELinux unhappy

Eric Paris wrote:
> I'm running an ext4 root filesystem and regularly get SELinux denials
> like:
> 
> Oct 16 08:32:55 localhost kernel: type=1400 audit(1224160369.076:5):
> avc: denied  { sys_resource } for  pid=1624 comm="dbus-daemon"
> capability=24 scontext=system_u:system_r:system_dbusd_t:s0
> tcontext=system_u:system_r:system_dbusd_t:s0 tclass=capability
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=467216

For the record, I've put a couple patches into the ext4 patch queue that
should do Eric's first suggestion of deferring the capable() check until
it's really needed.  Details are in the bug  above.

Thanks,
-Eric
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