linux-kernel - Re: [RFC] lsm: namespace hooks

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Date:	Thu, 27 Nov 2014 15:18:55 +0100
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Lukasz Pawelczyk <l.pawelczyk@...sung.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	James Morris <james.l.morris@...cle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Paul Moore <pmoore@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Nikolay Aleksandrov <nikolay@...hat.com>,
	Mark Rustad <mark.d.rustad@...el.com>,
	David Howells <dhowells@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Juri Lelli <juri.lelli@...il.com>,
	Daeseok Youn <daeseok.youn@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Dario Faggioli <raistlin@...ux.it>,
	Alex Thorlton <athorlton@....com>,
	Matthew Dempsky <mdempsky@...omium.org>,
	Davidlohr Bueso <davidlohr@...com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Linux Containers <containers@...ts.linux-foundation.org>,
	Lukasz Pawelczyk <havner@...il.com>
Subject: Re: [RFC] lsm: namespace hooks

On Thu, Nov 27, 2014 at 3:01 PM, Lukasz Pawelczyk
<l.pawelczyk@...sung.com> wrote:
>  extern struct dentry *securityfs_create_file(const char *name, umode_t mode,
> diff --git a/include/uapi/linux/sched.h b/include/uapi/linux/sched.h
> index 34f9d73..5ac7fb9 100644
> --- a/include/uapi/linux/sched.h
> +++ b/include/uapi/linux/sched.h
> @@ -21,8 +21,7 @@
>  #define CLONE_DETACHED         0x00400000      /* Unused, ignored */
>  #define CLONE_UNTRACED         0x00800000      /* set if the tracing process can't force CLONE_PTRACE on this clone */
>  #define CLONE_CHILD_SETTID     0x01000000      /* set the TID in the child */
> -/* 0x02000000 was previously the unused CLONE_STOPPED (Start in stopped state)
> -   and is now available for re-use. */
> +#define CLONE_NEWLSM           0x02000000      /* New LSM namespace */

FYI, CLONE_NEWCGROUP also claims last flag [1].

As it looks we will get more and more namespaces, more than clone() can handle.

[1] https://lkml.org/lkml/2014/7/17/588

-- 
Thanks,
//richard
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