Messages in this thread | | | Date | Mon, 11 Nov 2013 10:47:01 +0800 | From | Dave Young <> | Subject | Re: [patch 0/7 v2] kexec kernel efi runtime support |
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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
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