linux-kernel - Re: [PATCH 5/9] Make use of permissions, returned by kobj

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080308060410.GC13434@kroah.com>
Date:	Fri, 7 Mar 2008 22:04:10 -0800
From:	Greg KH <greg@...ah.com>
To:	"Serge E. Hallyn" <serue@...ibm.com>
Cc:	Pavel Emelyanov <xemul@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, menage@...gle.com, sukadev@...ibm.com
Subject: Re: [PATCH 5/9] Make use of permissions, returned by kobj_lookup

On Fri, Mar 07, 2008 at 12:50:52PM -0600, Serge E. Hallyn wrote:
> Quoting Greg KH (greg@...ah.com):
> > On Fri, Mar 07, 2008 at 11:35:42AM -0600, Serge E. Hallyn wrote:
> > > > Do you really want to run other LSMs within a containerd kernel?  Is
> > > > that a requirement?  It would seem to run counter to the main goal of
> > > > containers to me.
> > > 
> > > Until user namespaces are complete, selinux seems the only good solution
> > > to offer isolation.
> > 
> > Great, use that instead :)
> 
> That can't work as is since you can't specify major:minor in policy.

Your LSM can not, or the LSM interface does not allow this to happen?

> So all we could do again is simply refuse all mknod, which we can
> already do with per-process capability bounding sets.

I thought we passed that info down to the LSM module, can't you do your
selection at that point in time?

And then, just mediate open() like always, right?

thanks,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/