From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: James Bottomley
<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Cc: Ken Goldman <kgoldman-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>,
greg-R92VP3DqSWVWk0Htik3J/w@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: [RFC] tpm2-space: add handling for global session exhaustion
Date: Thu, 9 Feb 2017 14:54:41 -0700 [thread overview]
Message-ID: <20170209215441.GA3131@obsidianresearch.com> (raw)
In-Reply-To: <1486668591.2616.45.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
On Thu, Feb 09, 2017 at 11:29:51AM -0800, James Bottomley wrote:
> On Thu, 2017-02-09 at 12:04 -0700, Jason Gunthorpe wrote:
> > On Thu, Feb 09, 2017 at 05:19:22PM +0200, Jarkko Sakkinen wrote:
> > > The current patch set does not define policy. The simple policy
> > > addition that could be added soon is the limit of connections
> > > because it is easy to implement in non-intrusive way.
> >
> > It is also trivial for a userspace RM to limit the number of sessions
> > or connections or otherwise to manage this limitation. It is hard to
> > see why we'd need kernel support for this.
>
> Because the kernel is a primary TPM user.
When I said 'this' I meant a kernel policy to limit the number of
user connections.
Jason
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WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Ken Goldman <kgoldman@us.ibm.com>,
greg@enjellic.com, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
tpmdd-devel@lists.sourceforge.net
Subject: Re: [tpmdd-devel] [RFC] tpm2-space: add handling for global session exhaustion
Date: Thu, 9 Feb 2017 14:54:41 -0700 [thread overview]
Message-ID: <20170209215441.GA3131@obsidianresearch.com> (raw)
In-Reply-To: <1486668591.2616.45.camel@HansenPartnership.com>
On Thu, Feb 09, 2017 at 11:29:51AM -0800, James Bottomley wrote:
> On Thu, 2017-02-09 at 12:04 -0700, Jason Gunthorpe wrote:
> > On Thu, Feb 09, 2017 at 05:19:22PM +0200, Jarkko Sakkinen wrote:
> > > The current patch set does not define policy. The simple policy
> > > addition that could be added soon is the limit of connections
> > > because it is easy to implement in non-intrusive way.
> >
> > It is also trivial for a userspace RM to limit the number of sessions
> > or connections or otherwise to manage this limitation. It is hard to
> > see why we'd need kernel support for this.
>
> Because the kernel is a primary TPM user.
When I said 'this' I meant a kernel policy to limit the number of
user connections.
Jason
next prev parent reply other threads:[~2017-02-09 21:54 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <jarkko.sakkinen@linux.intel.com>
2017-02-09 9:06 ` [RFC] tpm2-space: add handling for global session exhaustion Dr. Greg Wettstein
2017-02-09 9:06 ` [tpmdd-devel] " Dr. Greg Wettstein
2017-02-09 19:24 ` James Bottomley
[not found] ` <201702090906.v1996c6a015552-DHO+NtfOqB5PEDpkEIzg7wC/G2K4zDHf@public.gmane.org>
2017-02-09 15:19 ` Jarkko Sakkinen
2017-02-09 15:19 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170209151922.cqo32h4io5dqyvvw-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-02-09 19:04 ` Jason Gunthorpe
2017-02-09 19:04 ` [tpmdd-devel] " Jason Gunthorpe
[not found] ` <20170209190426.GA1104-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-02-09 19:29 ` James Bottomley
2017-02-09 19:29 ` [tpmdd-devel] " James Bottomley
[not found] ` <1486668591.2616.45.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-02-09 21:54 ` Jason Gunthorpe [this message]
2017-02-09 21:54 ` Jason Gunthorpe
2017-02-10 8:48 ` Jarkko Sakkinen
[not found] ` <20170210084837.lq3mofgfwvjx623m-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-02-10 23:13 ` Kenneth Goldman
2017-02-09 20:05 ` James Bottomley
2017-02-09 20:05 ` [tpmdd-devel] " James Bottomley
[not found] <James.Bottomley@HansenPartnership.com>
2017-02-10 10:03 ` Dr. Greg Wettstein
[not found] ` <201702101003.v1AA3plF029882-DHO+NtfOqB5PEDpkEIzg7wC/G2K4zDHf@public.gmane.org>
2017-02-10 16:46 ` James Bottomley
[not found] ` <1486745163.2502.26.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-02-10 21:13 ` Kenneth Goldman
2017-02-14 14:38 ` [tpmdd-devel] " Dr. Greg Wettstein
[not found] ` <20170214143829.GA28175-DHO+NtfOqB5PEDpkEIzg7wC/G2K4zDHf@public.gmane.org>
2017-02-14 16:47 ` James Bottomley
2017-02-10 21:18 ` Kenneth Goldman
2017-01-18 20:48 James Bottomley
2017-01-18 20:48 ` James Bottomley
[not found] ` <1484772489.2396.2.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-19 12:25 ` Jarkko Sakkinen
[not found] ` <20170119122533.d7h5rgatpwl3qmcl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-19 12:41 ` Jarkko Sakkinen
[not found] ` <20170119124101.nw7a7m735zhiivfo-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-27 21:20 ` Ken Goldman
2017-01-27 21:59 ` James Bottomley
2017-01-19 12:59 ` James Bottomley
2017-01-27 21:42 ` Ken Goldman
2017-01-27 22:04 ` James Bottomley
[not found] ` <1485554699.3229.20.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-27 23:35 ` Jason Gunthorpe
[not found] ` <20170127233513.GA28995-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-01-27 23:48 ` James Bottomley
2017-01-30 0:52 ` Ken Goldman
2017-01-30 0:52 ` Ken Goldman
2017-01-30 16:04 ` James Bottomley
[not found] ` <1485792295.2518.23.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-30 21:58 ` Jarkko Sakkinen
[not found] ` <20170130215815.4lr42ob7e4cycwgi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-30 22:13 ` James Bottomley
[not found] ` <1485814388.2518.28.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-30 22:46 ` Ken Goldman
2017-01-31 13:31 ` Jarkko Sakkinen
2017-02-10 17:22 ` Kenneth Goldman
2017-01-31 19:28 ` Ken Goldman
2017-01-31 19:55 ` James Bottomley
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