lkml.org 
[lkml]   [2012]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: Kdump with signed images
From
On Fri, Nov 2, 2012 at 6:53 PM, Vivek Goyal <vgoyal@redhat.com> wrote:
> On Thu, Nov 01, 2012 at 02:52:25PM +0000, Matthew Garrett wrote:
>> On Thu, Nov 01, 2012 at 10:43:04AM -0400, Vivek Goyal wrote:
>>
>> > So I think this does satisfy the requirement matthew specified. Isn't it?
>> > Matthew, what do you think?
>>
>> Sure, if you can ensure that. You'll need to figure out how to get the
>> build system to sign the userspace binaries and you'll need to ensure
>> that they're statically linked and don't dlopen anything (including the
>> nsswitch modules), but otherwise that should work.
>>
>
> [ CC peter jones ]
>
> Ok, so even if we build kexec-tools statically with glibc, we have the
> issue of name service switch modules. glibc will still do dlopen on
> these modules. So what are options now.
>
> - Sign glibc and associated shared libraries. Do not allow unsigned
> shared library to dynamically link with signed executable.
>
> - Peter mentioned that work with uClibc for kexec-tools.
>
> I personally think that however hard it is but first option sounds like
> a long term solution. We might have more user space processes which
> we might have to trust a generic solution will help with that. For example,
> we might have to sign and trust qemu at some point of time.
>
> Are there other ways of handing glibc issue?
>

Have you seen http://sourceware.org/glibc/wiki/FAQ - "Even statically
linked programs need some shared libraries which is not acceptable for
me. What can I do?" Probably, worth trying.

Balbir Singh


\
 
 \ /
  Last update: 2012-11-02 16:21    [W:0.107 / U:0.428 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site