From: Samuel Mendoza-Jonas <sam@mendozajonas•com>
To: Thiago Jung Bauermann <bauerman@linux•vnet.ibm.com>,
Mimi Zohar <zohar@linux•vnet.ibm.com>
Cc: Dave Young <dyoung@redhat•com>,
kexec@lists•infradead.org, linux-kernel@vger•kernel.org,
linux-security-module@vger•kernel.org,
linux-ima-devel@lists•sourceforge.net,
linuxppc-dev@lists•ozlabs.org
Subject: Re: [PATCH 1/7] ima: on soft reboot, restore the measurement list
Date: Wed, 10 Aug 2016 09:13:16 +1000 [thread overview]
Message-ID: <1470784396.2301.2.camel@mendozajonas.com> (raw)
In-Reply-To: <3544655.o5QPxko4Ba@hactar>
On Tue, 2016-08-09 at 10:19 -0300, Thiago Jung Bauermann wrote:
> Am Dienstag, 09 August 2016, 09:01:13 schrieb Mimi Zohar:
> >
> > On Tue, 2016-08-09 at 20:59 +1000, Michael Ellerman wrote:
> > >
> > > Mimi Zohar <zohar@linux•vnet.ibm.com> writes:
> > > >
> > > > diff --git a/security/integrity/ima/ima.h
> > > > b/security/integrity/ima/ima.h
> > > > index b5728da..84e8d36 100644
> > > > --- a/security/integrity/ima/ima.h
> > > > +++ b/security/integrity/ima/ima.h
> > > > @@ -102,6 +102,13 @@ struct ima_queue_entry {
> > > >
> > > > };
> > > > extern struct list_head ima_measurements; /* list of all
> measurements
> >
> > >
> > > >
> > > > */
> > > >
> > > > +/* Some details preceding the binary serialized measurement list */
> > > > +struct ima_kexec_hdr {
> > > > + unsigned short version;
> > > > + unsigned long buffer_size;
> > > > + unsigned long count;
> > > > +} __packed;
> > > > +
> > >
> > > Am I understanding it correctly that this structure is passed between
> > > kernels?
> > Yes, the header prefixes the measurement list, which is being passed on
> > the same computer to the next kernel. Could the architecture (eg.
> > LE/BE) change between soft re-boots?
>
> Yes. I am able to boot a BE kernel from an LE kernel with my patches.
> Whether we want to support that or not is another question...
The answer to that question is almost certainly yes - on POWER the most
immediate example would be soft-rebooting from a BE host into an LE
Petitboot kernel, or vice versa.
next prev parent reply other threads:[~2016-08-09 23:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-04 12:24 [PATCH 0/7] ima: carry the measurement list across kexec Mimi Zohar
2016-08-04 12:24 ` [PATCH 1/7] ima: on soft reboot, restore the measurement list Mimi Zohar
2016-08-05 8:44 ` Petko Manolov
2016-08-05 13:34 ` Mimi Zohar
2016-08-05 15:56 ` Petko Manolov
2016-08-09 10:59 ` Michael Ellerman
2016-08-09 13:01 ` Mimi Zohar
2016-08-09 13:19 ` Thiago Jung Bauermann
2016-08-09 13:35 ` David Laight
2016-08-09 14:02 ` Mimi Zohar
2016-08-09 13:55 ` Mimi Zohar
2016-08-09 14:06 ` Mimi Zohar
2016-08-09 23:13 ` Samuel Mendoza-Jonas [this message]
2016-08-10 3:41 ` Michael Ellerman
2016-08-10 5:05 ` Thiago Jung Bauermann
2016-08-10 9:52 ` Michael Ellerman
2016-08-10 12:54 ` Mimi Zohar
2016-08-10 14:32 ` [Linux-ima-devel] " Petko Manolov
2016-08-10 14:40 ` David Laight
2016-08-10 15:48 ` Petko Manolov
2016-08-04 12:24 ` [PATCH 2/7] ima: permit duplicate measurement list entries Mimi Zohar
2016-08-04 12:24 ` [PATCH 3/7] ima: maintain memory size needed for serializing the measurement list Mimi Zohar
2016-08-04 12:24 ` [PATCH 4/7] ima: serialize the binary_runtime_measurements Mimi Zohar
2016-08-04 12:24 ` [PATCH 5/7] ima: on soft reboot, save the measurement list Mimi Zohar
2016-08-04 12:24 ` [PATCH 6/7] ima: store the builtin/custom template definitions in a list Mimi Zohar
2016-08-04 12:24 ` [PATCH 7/7] ima: support restoring multiple template formats Mimi Zohar
2016-08-09 5:19 ` [PATCH 0/7] ima: carry the measurement list across kexec Balbir Singh
2016-08-09 12:36 ` Mimi Zohar
2016-08-11 7:38 ` Balbir Singh
2016-08-11 11:25 ` Mimi Zohar
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