From: Matthew Garrett <mjg@redhat.com>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Dmitry Kasatkin <dmitry.kasatkin@intel.com>,
Kees Cook <keescook@chromium.org>,
kexec@lists.infradead.org,
linux kernel mailing list <linux-kernel@vger.kernel.org>,
horms@verge.net.au, "Eric W. Biederman" <ebiederm@xmission.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Roberto Sassu <roberto.sassu@polito.it>,
Dave Young <dyoung@redhat.com>, Vivek Goyal <vgoyal@redhat.com>,
Khalid Aziz <khalid@gonehiking.org>
Subject: Re: Kdump with signed images
Date: Fri, 26 Oct 2012 03:39:16 +0100 [thread overview]
Message-ID: <20121026023916.GA16762@srcf.ucam.org> (raw)
In-Reply-To: <1351214158.18115.186.camel@falcor>
On Thu, Oct 25, 2012 at 09:15:58PM -0400, Mimi Zohar wrote:
> On a running system, the package installer, after verifying the package
> integrity, would install each file with the associated 'security.ima'
> extended attribute. The 'security.evm' digital signature would be
> installed with an HMAC, calculated using a system unique key.
The idea isn't to prevent /sbin/kexec from being modified after
installation - it's to prevent it from being possible to install a
system that has a modified /sbin/kexec. Leaving any part of this up to
the package installer means that it doesn't solve the problem we're
trying to solve here. It must be impossible for the kernel to launch any
/sbin/kexec that hasn't been signed by a trusted key that's been built
into the kernel, and it must be impossible for anything other than
/sbin/kexec to make the kexec system call.
--
Matthew Garrett | mjg59@srcf.ucam.org
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next prev parent reply other threads:[~2012-10-26 2:43 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-18 3:10 [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting Dave Young
2012-10-18 14:56 ` Khalid Aziz
2012-10-18 19:11 ` Vivek Goyal
2012-10-18 19:22 ` Khalid Aziz
2012-10-18 19:38 ` [RFC] Kdump with UEFI secure boot (Re: [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting) Vivek Goyal
2012-10-18 19:55 ` Matthew Garrett
2012-10-18 22:25 ` Eric W. Biederman
2012-10-19 2:06 ` Vivek Goyal
2012-10-19 3:36 ` Eric W. Biederman
2012-10-19 14:31 ` Vivek Goyal
2012-10-22 20:43 ` Vivek Goyal
2012-10-22 21:11 ` Eric W. Biederman
2012-10-23 2:04 ` Simon Horman
2012-10-23 13:24 ` Vivek Goyal
2012-10-23 16:26 ` [RFC] Kdump with signed images Eric W. Biederman
2012-10-23 17:39 ` Vivek Goyal
2012-10-23 19:11 ` Maxim Uvarov
2012-10-23 19:16 ` Vivek Goyal
2012-10-22 21:07 ` [RFC] Kdump with UEFI secure boot (Re: [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting) Eric W. Biederman
2012-10-23 13:18 ` Vivek Goyal
2012-10-23 14:59 ` Vivek Goyal
2012-10-23 15:41 ` Matthew Garrett
2012-10-23 16:44 ` [RFC] Kdump with signed images Eric W. Biederman
2012-10-23 16:52 ` Matthew Garrett
2012-10-24 17:19 ` Vivek Goyal
2012-10-25 5:43 ` Mimi Zohar
2012-10-25 6:44 ` Kees Cook
2012-10-25 7:01 ` Mimi Zohar
2012-10-25 13:54 ` Vivek Goyal
2012-10-25 19:06 ` Mimi Zohar
2012-10-25 15:39 ` [RFC] Kdump with UEFI secure boot (Re: [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting) Vivek Goyal
2012-10-23 16:19 ` Kdump with signed images Eric W. Biederman
2012-10-23 16:31 ` Matthew Garrett
2012-10-23 17:03 ` Eric W. Biederman
2012-10-23 17:09 ` Matthew Garrett
2012-10-24 17:36 ` Vivek Goyal
2012-10-25 6:10 ` Mimi Zohar
2012-10-25 14:10 ` Vivek Goyal
2012-10-25 18:40 ` Mimi Zohar
2012-10-25 18:55 ` Vivek Goyal
2012-10-26 1:15 ` Mimi Zohar
2012-10-26 2:39 ` Matthew Garrett [this message]
2012-10-26 3:30 ` Eric W. Biederman
2012-10-26 17:06 ` Vivek Goyal
2012-10-26 18:37 ` Mimi Zohar
2012-11-01 13:10 ` Vivek Goyal
2012-11-01 13:53 ` Vivek Goyal
2012-11-01 14:29 ` Mimi Zohar
2012-11-01 14:43 ` Vivek Goyal
2012-11-01 14:52 ` Matthew Garrett
2012-11-02 13:23 ` Vivek Goyal
2012-11-02 14:29 ` Balbir Singh
2012-11-02 14:36 ` Vivek Goyal
2012-11-03 3:02 ` Balbir Singh
2012-11-02 21:34 ` H. Peter Anvin
2012-11-02 21:32 ` Eric W. Biederman
2012-11-05 18:03 ` Vivek Goyal
2012-11-05 19:44 ` Eric W. Biederman
2012-11-05 20:42 ` Vivek Goyal
2012-11-05 23:01 ` H. Peter Anvin
2012-11-06 19:34 ` Vivek Goyal
2012-11-06 23:51 ` Eric W. Biederman
2012-11-08 19:40 ` Vivek Goyal
2012-11-08 19:45 ` Vivek Goyal
2012-11-08 21:03 ` Eric W. Biederman
2012-11-09 14:39 ` Vivek Goyal
2012-11-15 5:09 ` Eric W. Biederman
2012-11-15 12:56 ` Mimi Zohar
2012-11-08 20:46 ` Mimi Zohar
2012-11-01 14:51 ` Vivek Goyal
2012-11-01 14:57 ` Matthew Garrett
2012-11-01 15:10 ` Khalid Aziz
2012-11-01 16:23 ` Matthew Garrett
2012-11-02 16:57 ` Khalid Aziz
2012-10-26 17:59 ` Mimi Zohar
2012-10-26 18:19 ` Matthew Garrett
2012-10-26 18:25 ` Mimi Zohar
2012-10-23 15:51 ` [RFC] Kdump with UEFI secure boot (Re: [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting) Eric W. Biederman
2012-10-23 17:18 ` Vivek Goyal
2012-10-19 17:53 ` Vivek Goyal
2012-10-22 21:15 ` Eric W. Biederman
2012-11-02 21:36 ` H. Peter Anvin
2012-11-05 18:11 ` Vivek Goyal
2012-11-05 19:54 ` Eric W. Biederman
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