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From: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
	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: Tue, 09 Aug 2016 10:19:28 -0300	[thread overview]
Message-ID: <3544655.o5QPxko4Ba@hactar> (raw)
In-Reply-To: <1470747673.2881.118.camel@linux.vnet.ibm.com>

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...
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center


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WARNING: multiple messages have this Message-ID (diff)
From: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
	linux-security-module@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	linux-ima-devel@lists.sourceforge.net,
	Dave Young <dyoung@redhat.com>
Subject: Re: [PATCH 1/7] ima: on soft reboot, restore the measurement list
Date: Tue, 09 Aug 2016 10:19:28 -0300	[thread overview]
Message-ID: <3544655.o5QPxko4Ba@hactar> (raw)
In-Reply-To: <1470747673.2881.118.camel@linux.vnet.ibm.com>

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...
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center

  reply	other threads:[~2016-08-09 13:19 UTC|newest]

Thread overview: 62+ 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 ` Mimi Zohar
2016-08-04 12:24 ` [PATCH 1/7] ima: on soft reboot, restore the measurement list Mimi Zohar
2016-08-04 12:24   ` Mimi Zohar
2016-08-05  8:44   ` Petko Manolov
2016-08-05  8:44     ` Petko Manolov
2016-08-05 13:34     ` Mimi Zohar
2016-08-05 13:34       ` Mimi Zohar
2016-08-05 15:56       ` Petko Manolov
2016-08-05 15:56         ` Petko Manolov
2016-08-09 10:59   ` Michael Ellerman
2016-08-09 10:59     ` Michael Ellerman
2016-08-09 13:01     ` Mimi Zohar
2016-08-09 13:01       ` Mimi Zohar
2016-08-09 13:19       ` Thiago Jung Bauermann [this message]
2016-08-09 13:19         ` Thiago Jung Bauermann
2016-08-09 13:35         ` David Laight
2016-08-09 13:35           ` David Laight
2016-08-09 13:35           ` David Laight
2016-08-09 14:02           ` Mimi Zohar
2016-08-09 14:02             ` Mimi Zohar
2016-08-09 13:55         ` Mimi Zohar
2016-08-09 13:55           ` Mimi Zohar
2016-08-09 14:06           ` Mimi Zohar
2016-08-09 14:06             ` Mimi Zohar
2016-08-09 23:13         ` Samuel Mendoza-Jonas
2016-08-09 23:13           ` Samuel Mendoza-Jonas
2016-08-10  3:41         ` Michael Ellerman
2016-08-10  3:41           ` Michael Ellerman
2016-08-10  5:05           ` Thiago Jung Bauermann
2016-08-10  5:05             ` Thiago Jung Bauermann
2016-08-10  9:52             ` Michael Ellerman
2016-08-10  9:52               ` Michael Ellerman
2016-08-10 12:54               ` Mimi Zohar
2016-08-10 12:54                 ` Mimi Zohar
2016-08-10 14:32                 ` [Linux-ima-devel] " Petko Manolov
2016-08-10 14:32                   ` Petko Manolov
2016-08-10 14:40                   ` David Laight
2016-08-10 14:40                     ` David Laight
2016-08-10 14:40                     ` David Laight
2016-08-10 15:48                     ` Petko Manolov
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   ` 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   ` Mimi Zohar
2016-08-04 12:24 ` [PATCH 4/7] ima: serialize the binary_runtime_measurements Mimi Zohar
2016-08-04 12:24   ` 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   ` 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   ` Mimi Zohar
2016-08-04 12:24 ` [PATCH 7/7] ima: support restoring multiple template formats Mimi Zohar
2016-08-04 12:24   ` Mimi Zohar
2016-08-09  5:19 ` [PATCH 0/7] ima: carry the measurement list across kexec Balbir Singh
2016-08-09  5:19   ` Balbir Singh
2016-08-09 12:36   ` Mimi Zohar
2016-08-09 12:36     ` Mimi Zohar
2016-08-11  7:38     ` Balbir Singh
2016-08-11  7:38       ` Balbir Singh
2016-08-11 11:25       ` Mimi Zohar
2016-08-11 11:25         ` Mimi Zohar

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