linux-kernel - Re: [PATCH 4/6] kexec: A new system call, kexec_file

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Message-ID: <20131121190620.GA25951@srcf.ucam.org>
Date:	Thu, 21 Nov 2013 19:06:20 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Greg KH <greg@...ah.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org, ebiederm@...ssion.com, hpa@...or.com
Subject: Re: [PATCH 4/6] kexec: A new system call, kexec_file_load, for in
 kernel kexec

On Thu, Nov 21, 2013 at 11:03:50AM -0800, Greg KH wrote:

> This could be done as we do with modules, and just tack the signature
> onto the end of the 'blob' of the image.  That way we could use the same
> tool to sign the binary as we do for modules, and save the need for
> extra parameters in the syscall.

That would require a certain degree of massaging from userspace if we 
want to be able to use the existing Authenticode signatures. Otherwise 
we need to sign kernels twice.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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