From: Vivek Goyal <vgoyal@redhat.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Daniel Kiper <daniel.kiper@oracle.com>,
"x86@kernel.org" <x86@kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
David Howells <dhowells@redhat.com>,
"mingo@redhat.com" <mingo@redhat.com>,
Jan Beulich <JBeulich@suse.com>, "H. Peter Anvin" <hpa@zytor.com>,
"maxim.uvarov@oracle.com" <maxim.uvarov@oracle.com>,
"tglx@linutronix.de" <tglx@linutronix.de>
Subject: Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation
Date: Fri, 11 Jan 2013 15:52:32 -0500 [thread overview]
Message-ID: <20130111205232.GC17126@redhat.com> (raw)
In-Reply-To: <87k3rjtqi7.fsf@xmission.com>
On Fri, Jan 11, 2013 at 12:26:56PM -0800, Eric W. Biederman wrote:
[..]
> Recently there is a desire to figure out how to /sbin/kexec support
> signed kernel images. What will probably happen is to have a specially
> trusted userspace application perform the verification. Sort of like
> dom0 for the linux userspace. A few other ideas have been batted around
> but none that have stuck.
[ CC David Howells ]
Eric,
In a private conversation, David Howells suggested why not pass kernel
signature in a segment to kernel and kernel can do the verification.
/sbin/kexec signature is verified by kernel at exec() time. Then
/sbin/kexec just passes one signature segment (after regular segment) for
each segment being loaded. The segments which don't have signature,
are passed with section size 0. And signature passing behavior can be
controlled by one new kexec flag.
That way /sbin/kexec does not have to worry about doing any verification
by itself. In fact, I am not sure how it can do the verification when
crypto libraries it will need are not signed (assuming they are not
statically linked in).
What do you think about this idea?
Thanks
Vivek
next prev parent reply other threads:[~2013-01-11 20:52 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-27 2:18 [PATCH v3 00/11] xen: Initial kexec/kdump implementation Daniel Kiper
[not found] ` <1356574740-6806-1-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Daniel Kiper
[not found] ` <1356574740-6806-2-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE Daniel Kiper
[not found] ` <1356574740-6806-3-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 03/11] xen: Introduce architecture independent data for kexec/kdump Daniel Kiper
[not found] ` <1356574740-6806-4-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 04/11] x86/xen: Introduce architecture dependent " Daniel Kiper
[not found] ` <1356574740-6806-5-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 05/11] x86/xen: Register resources required by kexec-tools Daniel Kiper
[not found] ` <1356574740-6806-6-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation Daniel Kiper
[not found] ` <1356574740-6806-7-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 07/11] x86/xen: Add x86_64 " Daniel Kiper
[not found] ` <1356574740-6806-8-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 08/11] x86/xen: Add kexec/kdump Kconfig and makefile rules Daniel Kiper
[not found] ` <1356574740-6806-9-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks Daniel Kiper
[not found] ` <1356574740-6806-10-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 10/11] drivers/xen: Export vmcoreinfo through sysfs Daniel Kiper
[not found] ` <1356574740-6806-11-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:19 ` [PATCH v3 11/11] x86: Add Xen kexec control code size check to linker script Daniel Kiper
2012-12-27 18:53 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks H. Peter Anvin
2012-12-27 4:00 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation H. Peter Anvin
2012-12-27 3:33 ` [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE H. Peter Anvin
2013-01-03 9:34 ` Jan Beulich
[not found] ` <50E55ECF02000078000B2A13@nat28.tlf.novell.com>
2013-01-04 15:15 ` Daniel Kiper
[not found] ` <20130104151542.GD3346@host-192-168-1-59.local.net-space.pl>
2013-01-04 16:12 ` Jan Beulich
[not found] ` <50E70D8002000078000B336D@nat28.tlf.novell.com>
2013-01-04 17:25 ` Daniel Kiper
[not found] ` <20130104172538.GC3472@host-192-168-1-59.local.net-space.pl>
2013-01-07 9:48 ` Jan Beulich
[not found] ` <50EAA7F402000078000B34C3@nat28.tlf.novell.com>
2013-01-07 12:52 ` Daniel Kiper
[not found] ` <20130107125211.GB2927@host-192-168-1-59.local.net-space.pl>
2013-01-07 13:05 ` Jan Beulich
[not found] ` <50EAD61602000078000B36A0@nat28.tlf.novell.com>
2013-01-09 18:42 ` Daniel Kiper
2013-01-10 14:07 ` David Vrabel
[not found] ` <50EECB23.4090603@citrix.com>
2013-01-11 13:36 ` Daniel Kiper
2012-12-27 4:46 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Eric W. Biederman
2012-12-27 4:02 ` [PATCH v3 00/11] xen: Initial kexec/kdump implementation H. Peter Anvin
2012-12-27 7:53 ` Eric W. Biederman
2012-12-27 14:18 ` Andrew Cooper
2012-12-27 18:02 ` Eric W. Biederman
2013-01-02 11:26 ` [Xen-devel] " Andrew Cooper
2013-01-02 11:47 ` Eric W. Biederman
2013-01-03 9:31 ` Jan Beulich
2013-01-04 14:22 ` Daniel Kiper
2013-01-04 14:34 ` Konrad Rzeszutek Wilk
2013-01-04 14:34 ` Ian Campbell
2013-01-04 14:38 ` David Vrabel
2013-01-04 17:01 ` Daniel Kiper
2013-01-10 14:19 ` David Vrabel
2013-01-11 13:22 ` Daniel Kiper
2013-01-11 15:22 ` David Vrabel
2013-01-11 17:34 ` Daniel Kiper
2013-01-11 20:05 ` Eric W. Biederman
2013-01-04 14:41 ` Jan Beulich
[not found] ` <50E6F81D02000078000B3245-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2013-01-04 17:07 ` Daniel Kiper
2013-01-04 19:11 ` Konrad Rzeszutek Wilk
[not found] ` <20130104191146.GC6721-6K5HmflnPlqSPmnEAIUT9EEOCMrvLtNR@public.gmane.org>
2013-01-07 10:25 ` Ian Campbell
2013-01-07 10:46 ` Andrew Cooper
2013-01-07 10:54 ` Ian Campbell
2013-01-07 12:34 ` Daniel Kiper
[not found] ` <20130107123404.GA2927-UojuW/CpjwpdUOLzJiIvSsFoITBeLw/klGfBN0aaEZ+lPcVs/6D9LQ@public.gmane.org>
2013-01-07 13:49 ` Ian Campbell
2013-01-11 13:47 ` Daniel Kiper
2013-01-07 16:20 ` Konrad Rzeszutek Wilk
2013-01-11 4:16 ` Eric W. Biederman
2013-01-11 16:55 ` Konrad Rzeszutek Wilk
2013-01-11 20:26 ` H. Peter Anvin
2013-01-11 20:43 ` Vivek Goyal
2013-01-11 20:26 ` Eric W. Biederman
2013-01-11 20:52 ` Vivek Goyal [this message]
[not found] ` <20130111205232.GC17126-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-11 21:03 ` H. Peter Anvin
[not found] ` <50F07E2D.6010602-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-01-11 21:08 ` Vivek Goyal
2013-01-11 21:14 ` H. Peter Anvin
[not found] ` <50DC58C4.3000307-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org>
2013-01-02 15:27 ` Ian Campbell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130111205232.GC17126@redhat.com \
--to=vgoyal@redhat.com \
--cc=JBeulich@suse.com \
--cc=andrew.cooper3@citrix.com \
--cc=daniel.kiper@oracle.com \
--cc=dhowells@redhat.com \
--cc=ebiederm@xmission.com \
--cc=hpa@zytor.com \
--cc=kexec@lists.infradead.org \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=maxim.uvarov@oracle.com \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=virtualization@lists.linux-foundation.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).