lkml.org 
[lkml]   [2013]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 0/7 v2] kexec kernel efi runtime support
On 11/10/13 at 06:21pm, H. Peter Anvin wrote:
> On 11/10/2013 06:13 PM, Dave Young wrote:
> >
> > Huang Ying <ying.huang@intel.com> created the debugfs file for boot_params.
> > His first version patch tried sysfs, but sysfs is not designed for such
> > binary blobs so finally it go to debugfs.
> >
>
> That is a misunderstanding. Binary blobs can exist in sysfs as long as
> the blob is something that is inherently a blob. This is admittedly a
> corner case, but it is without any doubt a protocol-defined binary
> structure.

You are right. Greg objected that the whole structure being exported directly.

>
> The reason it was put in debugfs is that there was no non-debug user for
> it at the time.

Ok, I did not know this background.

>
> > Any idea for this is welcome, till now I have no better idea for such kind
> > of data. We should have another *fs instead of using debugfs.
>
> The problem with debugfs is that things go into debugfs with largely no
> auditing. As a result, mounting debugfs is very likely to mean that
> your system is exploitable one way or another.

Hmm, agree. Thanks for explaining about it.

Thanks
Dave


\
 
 \ /
  Last update: 2013-11-11 04:21    [W:0.067 / U:0.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site