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From: "Serge E. Hallyn" <serue@us.ibm.com>
To: Michael Stone <michael@laptop.org>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	"Andi Kleen" <andi@firstfloor.org>, "David Lang" <david@lang.hm>,
	"Oliver Hartkopp" <socketcan@hartkopp.net>,
	"Alan Cox" <alan@lxorguk.ukuu.org.uk>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	"Valdis Kletnieks" <Valdis.Kletnieks@vt.edu>,
	"Bryan Donlan" <bdonlan@gmail.com>,
	"Evgeniy Polyakov" <zbr@ioremap.net>,
	"C. Scott Ananian" <cscott@cscott.net>,
	"James Morris" <jmorris@namei.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	"Bernie Innocenti" <bernie@codewiz.org>,
	"Mark Seaborn" <mrs@mythic-beasts.com>,
	"Randy Dunlap" <randy.dunlap@oracle.com>,
	"Américo Wang" <xiyou.wangcong@gmail.com>,
	"Tetsuo Handa" <penguin-kernel@i-love.sakura.ne.jp>,
	"Samir Bellabes" <sam@synack.fr>,
	"Casey Schaufler" <casey@schaufler-ca.com>,
	"Pavel Machek" <pavel@ucw.cz>,
	"Al Viro" <viro@ZenIV.linux.org.uk>,
	"Kyle Moffett" <kyle@moffetthome.net>,
	"Andrew Morgan" <morgan@kernel.org>
Subject: Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)
Date: Thu, 14 Jan 2010 11:36:39 -0600	[thread overview]
Message-ID: <20100114173639.GA15587@us.ibm.com> (raw)
In-Reply-To: <20100114171309.GA6372@heat>

Quoting Michael Stone (michael@laptop.org):
> Quoting Michael Stone (michael@laptop.org):
> 
> >Ah - but I worry that if you do that Alan or others will object.  Where do
> >you plan to store the disablenet_allowed bit?
> 
> If using prctl directly, I would store the bit in the task->network bitfield
> introduced by the earlier patches.
> 
> >You can use security_prctl() to keep the code out of sys_prctl().
> 
> I don't understand this suggestion; can you clarify? (Also, for what it's
> worth: I intended to put the check for CAP_SETPCAP in prctl_set_network().)
> 
> >but you still have the question of whether you add a bit to the task struct,
> >use task->security and not stack with selinux, use a thread flag, or try to
> >enable stacking of task->security.
> 
> For this revision of the patch, I will use the same approach as the previous
> patches (conditionally compiled task->network).
> 
> Michael
> 
> P.S. - Patches to follow tonight or tomorrow.

Cool I'll just wait for the patches  :)

thanks,
-serge

WARNING: multiple messages have this Message-ID (diff)
From: "Serge E. Hallyn" <serue@us.ibm.com>
To: Michael Stone <michael@laptop.org>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	"Andi Kleen" <andi@firstfloor.org>, "David Lang" <david@lang.hm>,
	"Oliver Hartkopp" <socketcan@hartkopp.net>,
	"Alan Cox" <alan@lxorguk.ukuu.org.uk>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	"Valdis Kletnieks" <Valdis.Kletnieks@vt.edu>,
	"Bryan Donlan" <bdonlan@gmail.com>,
	"Evgeniy Polyakov" <zbr@ioremap.net>,
	"C. Scott Ananian" <cscott@cscott.net>,
	"James Morris" <jmorris@namei.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	"Bernie Innocenti" <bernie@codewiz.org>,
	"Mark Seaborn" <mrs@mythic-beasts.com>,
	"Randy Dunlap" <randy.dunlap@oracle.com>,
	"Américo Wang" <xiyou.wangcong@gmail.com>,
	"Tetsuo Handa" <penguin-kernel@i-love.sakura.ne.jp>,
	"Samir Bellabes" <sam@synack.fr>,
	"Casey Schaufler" <casey@schaufler-ca.com>,
	"Pavel Machek" <pavel@ucw.cz>,
	"Al Viro" <viro@ZenIV.linux.org.uk>
Subject: Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)
Date: Thu, 14 Jan 2010 11:36:39 -0600	[thread overview]
Message-ID: <20100114173639.GA15587@us.ibm.com> (raw)
In-Reply-To: <20100114171309.GA6372@heat>

Quoting Michael Stone (michael@laptop.org):
> Quoting Michael Stone (michael@laptop.org):
> 
> >Ah - but I worry that if you do that Alan or others will object.  Where do
> >you plan to store the disablenet_allowed bit?
> 
> If using prctl directly, I would store the bit in the task->network bitfield
> introduced by the earlier patches.
> 
> >You can use security_prctl() to keep the code out of sys_prctl().
> 
> I don't understand this suggestion; can you clarify? (Also, for what it's
> worth: I intended to put the check for CAP_SETPCAP in prctl_set_network().)
> 
> >but you still have the question of whether you add a bit to the task struct,
> >use task->security and not stack with selinux, use a thread flag, or try to
> >enable stacking of task->security.
> 
> For this revision of the patch, I will use the same approach as the previous
> patches (conditionally compiled task->network).
> 
> Michael
> 
> P.S. - Patches to follow tonight or tomorrow.

Cool I'll just wait for the patches  :)

thanks,
-serge

  parent reply	other threads:[~2010-01-14 17:37 UTC|newest]

Thread overview: 278+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-27  1:04 RFC: disablenetwork facility. (v4) Michael Stone
2009-12-27  1:04 ` Michael Stone
2009-12-27  1:06 ` [PATCH 1/3] Security: Add disablenetwork interface. (v4) Michael Stone
2009-12-27  1:06   ` Michael Stone
2009-12-27  3:26   ` Serge E. Hallyn
2009-12-28 18:13     ` Serge E. Hallyn
2009-12-29  1:21       ` Michael Stone
2009-12-29  5:26         ` Serge E. Hallyn
2009-12-27  7:53   ` Pavel Machek
2009-12-29  1:25     ` Michael Stone
2009-12-29  1:25       ` Michael Stone
2009-12-30 10:09       ` Pavel Machek
2009-12-30 18:47   ` Serge E. Hallyn
2009-12-27  1:06 ` [PATCH 2/3] Security: Implement disablenetwork semantics. (v4) Michael Stone
2009-12-27  1:06   ` Michael Stone
2009-12-27  1:20   ` Tetsuo Handa
2009-12-30 18:50   ` Serge E. Hallyn
2010-01-01 14:31     ` Pavel Machek
2010-01-10 21:11       ` James Morris
2010-01-10 21:16         ` Pavel Machek
2010-01-10 21:44           ` James Morris
2010-01-10 21:54         ` Michael Stone
2010-01-10 21:54           ` Michael Stone
2010-01-10 21:58           ` Pavel Machek
2010-01-10 21:58             ` Pavel Machek
2010-01-10 22:40             ` Michael Stone
2010-01-10 22:40               ` Michael Stone
2010-01-11  1:07               ` Tetsuo Handa
2010-01-11  1:45                 ` Michael Stone
2010-01-11  1:45                   ` Michael Stone
2010-01-11 17:49                   ` Serge E. Hallyn
2010-01-11 17:49                     ` Serge E. Hallyn
2010-01-12  6:10                     ` Michael Stone
2010-01-12  6:10                       ` Michael Stone
2010-01-12 15:52                       ` Serge E. Hallyn
2010-01-12 15:52                         ` Serge E. Hallyn
2010-01-14  9:23                         ` Pavel Machek
2010-01-14  9:23                           ` Pavel Machek
2010-01-14 15:00                           ` Serge E. Hallyn
2010-01-14 15:00                             ` Serge E. Hallyn
2010-01-14 16:36                             ` Michael Stone
2010-01-14 16:36                               ` Michael Stone
2010-01-14 16:47                               ` Serge E. Hallyn
2010-01-14 16:47                                 ` Serge E. Hallyn
     [not found]                                 ` <20100114171309.GA6372@heat>
2010-01-14 17:36                                   ` Serge E. Hallyn [this message]
2010-01-14 17:36                                     ` Serge E. Hallyn
2010-01-15  8:10                                     ` disablenetwork (v5) patches Michael Stone
2010-01-15  8:10                                       ` Michael Stone
2010-01-15  8:12                                       ` disablenetwork (v5): Remove a TOCTTOU race by passing flags by value Michael Stone
2010-01-15  8:12                                         ` Michael Stone
2010-01-15  8:12                                       ` disablenetwork (v5): Simplify the disablenetwork sendmsg hook Michael Stone
2010-01-15  8:12                                         ` Michael Stone
2010-01-15  8:13                                       ` disablenetwork (v5): Require CAP_SETPCAP to enable disablenetwork Michael Stone
2010-01-15  8:13                                         ` Michael Stone
2010-01-17  2:58                                         ` Andrew G. Morgan
2010-01-17  2:58                                           ` Andrew G. Morgan
     [not found]                                           ` <20100117044825.GA2712@heat>
2010-01-17  4:58                                             ` disablenetwork (v5): Require CAP_SETPCAP to enable Andrew G. Morgan
2010-01-17  4:58                                               ` Andrew G. Morgan
2010-01-18 19:30                                               ` Serge E. Hallyn
2010-01-18 19:30                                                 ` Serge E. Hallyn
2010-01-15  8:13                                       ` disablenetwork (v5): Update documentation for PR_NETWORK_ENABLE_DN Michael Stone
2010-01-15  8:13                                         ` Michael Stone
2010-01-17  6:01                                       ` disablenetwork (v5) patches Kyle Moffett
2010-01-17  6:01                                         ` Kyle Moffett
2010-01-17  6:01                                         ` Kyle Moffett
     [not found]                                         ` <20100117180728.GA2848@heat>
2010-01-17 21:17                                           ` Kyle Moffett
2010-01-17 21:17                                             ` Kyle Moffett
2010-01-12 18:30                     ` [PATCH 2/3] Security: Implement disablenetwork semantics. (v4) David Wagner
2010-01-13 20:23                       ` Pavel Machek
2010-01-11  1:46                 ` Casey Schaufler
2010-01-12  3:19                   ` Valdis.Kletnieks
2010-01-12  4:01                     ` Casey Schaufler
2010-01-11 12:01               ` Pavel Machek
2010-01-11  1:29             ` David Wagner
2010-01-11 13:39               ` Simon Horman
2010-01-12  2:54             ` Valdis.Kletnieks
2010-01-12  7:59               ` Pavel Machek
2010-01-12 14:28                 ` Valdis.Kletnieks
2010-01-14  9:22                   ` Pavel Machek
2010-01-14 14:30                     ` David Wagner
2010-01-18 12:54                     ` Valdis.Kletnieks
2010-01-18 15:56                       ` Andrew G. Morgan
2010-01-18 15:56                         ` Andrew G. Morgan
2010-01-10 22:18           ` Kyle Moffett
2010-01-10 22:18             ` Kyle Moffett
2010-01-10 23:08             ` Michael Stone
2010-01-10 23:08               ` Michael Stone
2010-01-10 23:41               ` Bryan Donlan
2010-01-10 23:41                 ` Bryan Donlan
2010-01-11  1:50                 ` Casey Schaufler
2010-01-11  1:50                   ` Casey Schaufler
2010-01-11  2:15                   ` Bryan Donlan
2010-01-11  2:15                     ` Bryan Donlan
2010-01-11 11:53                     ` Pavel Machek
2010-01-11 11:53                       ` Pavel Machek
2010-01-11  1:41             ` David Wagner
2010-01-10 22:58           ` James Morris
2010-01-11  1:21           ` David Wagner
2009-12-27  1:07 ` [PATCH 3/3] Security: Document disablenetwork. (v4) Michael Stone
2009-12-27  1:07   ` Michael Stone
2009-12-27  1:39   ` Tetsuo Handa
2009-12-27 16:25     ` Michael Stone
2009-12-27  8:36 ` RFC: disablenetwork facility. (v4) Tetsuo Handa
2009-12-27  8:38   ` Pavel Machek
2009-12-27 11:49     ` Tetsuo Handa
2009-12-27 12:18       ` Al Viro
2009-12-27 15:03       ` Serge E. Hallyn
2009-12-27 15:47         ` Michael Stone
2009-12-27 16:12           ` Serge E. Hallyn
2009-12-27 16:36             ` Michael Stone
2009-12-27 18:06               ` Pavel Machek
2009-12-27 19:08         ` Pavel Machek
2009-12-28  6:07           ` Michael Stone
2009-12-28  6:07             ` Michael Stone
2009-12-28 10:10             ` Pavel Machek
2009-12-28 14:37               ` Valdis.Kletnieks
2009-12-28 20:55                 ` Pavel Machek
2009-12-28 21:28                   ` Valdis.Kletnieks
2009-12-28 21:33                   ` Bryan Donlan
2009-12-28 21:33                     ` Bryan Donlan
2009-12-29  6:08                     ` Serge E. Hallyn
2010-01-01 15:06                     ` Pavel Machek
2009-12-28 16:31               ` Michael Stone
2009-12-28 16:31                 ` Michael Stone
2009-12-28 21:08                 ` Pavel Machek
2009-12-28 21:24                 ` Valdis.Kletnieks
2009-12-28 22:10                   ` David Wagner
2009-12-28 23:54                     ` Valdis.Kletnieks
2009-12-29  0:42                       ` David Wagner
2009-12-29  1:39                         ` Valdis.Kletnieks
2010-01-01 15:55                     ` Pavel Machek
2009-12-28 18:13           ` Serge E. Hallyn
2009-12-29  5:01             ` Michael Stone
2009-12-29  5:01               ` Michael Stone
2009-12-29  5:56               ` Serge E. Hallyn
2009-12-29 16:31                 ` Michael Stone
2009-12-29 16:31                   ` Michael Stone
2009-12-29 11:06               ` Eric W. Biederman
2009-12-29 15:11                 ` Serge E. Hallyn
2009-12-29 16:05                   ` Bryan Donlan
2009-12-29 16:39                     ` Serge E. Hallyn
2009-12-29 16:39                       ` Serge E. Hallyn
2009-12-29 17:01                       ` Bryan Donlan
2009-12-29 17:01                         ` Bryan Donlan
2009-12-29 18:36                         ` Eric W. Biederman
2009-12-29 18:36                           ` Eric W. Biederman
2009-12-29 19:08                           ` Bryan Donlan
2009-12-29 20:56                             ` Eric W. Biederman
2009-12-29 21:27                             ` Serge E. Hallyn
2009-12-29 21:27                               ` Serge E. Hallyn
2009-12-29 21:46                               ` Valdis.Kletnieks
2009-12-29 22:16                                 ` Serge E. Hallyn
2009-12-29 20:10                     ` Benny Amorsen
2009-12-29 20:10                       ` Benny Amorsen
2009-12-29 20:40                       ` Eric W. Biederman
2009-12-29 20:40                         ` Eric W. Biederman
2009-12-29 20:43                         ` Bryan Donlan
2009-12-29 20:43                           ` Bryan Donlan
2009-12-29 21:11                         ` Alan Cox
2009-12-29 21:11                           ` Alan Cox
2009-12-29 21:14                           ` Bryan Donlan
2009-12-29 21:14                             ` Bryan Donlan
2009-12-29 21:35                             ` Alan Cox
2009-12-29 21:35                               ` Alan Cox
2009-12-29 21:29                           ` Eric W. Biederman
2009-12-29 21:29                             ` Eric W. Biederman
2009-12-29 22:36                             ` Serge E. Hallyn
2009-12-29 22:36                               ` Serge E. Hallyn
2009-12-30  3:26                               ` Eric W. Biederman
2009-12-30  3:26                                 ` Eric W. Biederman
2009-12-30  3:50                                 ` Serge E. Hallyn
2009-12-30  3:50                                   ` Serge E. Hallyn
2009-12-30  4:29                                   ` Eric W. Biederman
2009-12-30  4:29                                     ` Eric W. Biederman
2009-12-30 18:00                                     ` Serge E. Hallyn
2009-12-30 18:00                                       ` Serge E. Hallyn
2009-12-30 21:12                                       ` Eric W. Biederman
2009-12-30 21:12                                         ` Eric W. Biederman
2009-12-30  3:35                               ` [RFC][PATCH] Unprivileged: Disable acquisition of privileges Eric W. Biederman
2009-12-30  3:35                                 ` Eric W. Biederman
2009-12-30  3:54                                 ` Bryan Donlan
2009-12-30  3:54                                   ` Bryan Donlan
2009-12-30  4:33                                   ` Eric W. Biederman
2009-12-30  4:33                                     ` Eric W. Biederman
2009-12-30  4:57                                     ` Bryan Donlan
2009-12-30  4:57                                       ` Bryan Donlan
2009-12-30 12:47                                       ` Eric W. Biederman
2009-12-30 12:47                                         ` Eric W. Biederman
2009-12-30 12:49                                       ` [RFC][PATCH v2] Unprivileged: Disable raising " Eric W. Biederman
2009-12-30 12:49                                         ` Eric W. Biederman
2009-12-30 14:52                                         ` Andrew G. Morgan
2009-12-30 14:52                                           ` Andrew G. Morgan
2009-12-30 18:35                                           ` Serge E. Hallyn
2009-12-30 18:35                                             ` Serge E. Hallyn
2009-12-30 20:07                                             ` Eric W. Biederman
2009-12-30 20:07                                               ` Eric W. Biederman
2009-12-30 20:17                                               ` Serge E. Hallyn
2009-12-30 20:17                                                 ` Serge E. Hallyn
2009-12-30 21:15                                                 ` [RFC][PATCH v3] " Eric W. Biederman
2009-12-30 21:15                                                   ` Eric W. Biederman
2009-12-30 21:29                                                   ` Alan Cox
2009-12-30 21:29                                                     ` Alan Cox
2009-12-30 21:36                                                     ` Eric W. Biederman
2009-12-30 21:36                                                       ` Eric W. Biederman
2009-12-30 23:00                                                       ` Alan Cox
2009-12-30 23:00                                                         ` Alan Cox
2009-12-31  2:44                                                         ` Bryan Donlan
2009-12-31  2:44                                                           ` Bryan Donlan
2009-12-31 17:33                                                           ` Alan Cox
2009-12-31 17:33                                                             ` Alan Cox
2009-12-31 17:52                                                             ` David Wagner
2009-12-31 17:52                                                             ` Serge E. Hallyn
2009-12-31 17:52                                                               ` Serge E. Hallyn
2009-12-31 18:20                                                               ` Andrew G. Morgan
2009-12-31 18:20                                                                 ` Andrew G. Morgan
2009-12-31 18:32                                                                 ` Eric W. Biederman
2009-12-31 18:32                                                                   ` Eric W. Biederman
2010-01-01 14:43                                                                   ` Alan Cox
2010-01-01 14:43                                                                     ` Alan Cox
2010-01-01 14:53                                                                     ` Pavel Machek
2010-01-01 14:53                                                                       ` Pavel Machek
2010-01-01 16:26                                                                     ` Eric W. Biederman
2010-01-01 16:26                                                                       ` Eric W. Biederman
2010-01-01 21:35                                                                       ` Casey Schaufler
2010-01-01 21:35                                                                         ` Casey Schaufler
2010-01-01 22:39                                                                         ` Alan Cox
2010-01-01 22:39                                                                           ` Alan Cox
2010-01-01 23:18                                                                           ` Casey Schaufler
2010-01-01 23:18                                                                             ` Casey Schaufler
2010-01-02  0:42                                                                           ` Peter Dolding
2010-01-02  0:42                                                                             ` Peter Dolding
     [not found]                                                                             ` <4B3FB0FC.3030809@schaufler-ca.com>
2010-01-03  1:43                                                                               ` Peter Dolding
2010-01-03  1:43                                                                                 ` Peter Dolding
2009-12-31 18:41                                                                 ` Eric W. Biederman
2009-12-31 18:41                                                                   ` Eric W. Biederman
2009-12-31 21:46                                                                   ` Serge E. Hallyn
2009-12-31 21:46                                                                     ` Serge E. Hallyn
2010-01-01 21:17                                                                   ` Andrew G. Morgan
2010-01-01 21:17                                                                     ` Andrew G. Morgan
2010-01-01 14:57                                                               ` Alan Cox
2010-01-01 14:57                                                                 ` Alan Cox
2009-12-31  8:57                                                         ` Eric W. Biederman
2009-12-31  8:57                                                           ` Eric W. Biederman
2009-12-31 13:00                                                         ` Samir Bellabes
2009-12-31 13:00                                                           ` Samir Bellabes
2009-12-31 14:08                                                           ` Peter Dolding
2009-12-31 14:08                                                             ` Peter Dolding
2009-12-31 17:06                                                             ` Alan Cox
2009-12-31 17:06                                                               ` Alan Cox
2009-12-31 17:55                                                               ` David Wagner
2010-01-01 14:46                                                                 ` Alan Cox
2010-01-02  6:23                                                                   ` David Wagner
2010-01-02 13:55                                                                     ` Alan Cox
2010-01-04  0:55                                                                       ` David Wagner
2010-01-01  0:12                                                               ` Peter Dolding
2010-01-01  0:12                                                                 ` Peter Dolding
2010-01-01 10:28                                                     ` Pavel Machek
2010-01-01 10:28                                                       ` Pavel Machek
2009-12-31 15:25                                                   ` Serge E. Hallyn
2009-12-31 15:25                                                     ` Serge E. Hallyn
2009-12-31 16:48                                                     ` Eric W. Biederman
2009-12-31 16:48                                                       ` Eric W. Biederman
2009-12-30 18:29                                         ` [RFC][PATCH v2] " Serge E. Hallyn
2009-12-30 18:29                                           ` Serge E. Hallyn
2009-12-30 20:45                                           ` Eric W. Biederman
2009-12-30 20:45                                             ` Eric W. Biederman
2009-12-29 18:03                   ` RFC: disablenetwork facility. (v4) Eric W. Biederman
2009-12-29 16:06                 ` Michael Stone
2009-12-29 16:06                   ` Michael Stone
2009-12-30  7:24                 ` David Wagner
2009-12-30 16:26                   ` Valdis.Kletnieks
2010-01-01 11:41                   ` Eric W. Biederman
2010-01-02  6:28                     ` David Wagner
2010-01-01 15:11               ` Pavel Machek
2009-12-27  8:51   ` Al Viro
2009-12-27 11:23   ` Valdis.Kletnieks
2009-12-27 12:45   ` Andi Kleen
2009-12-27 15:55   ` Michael Stone

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