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xen-devel
[Xen-devel] Re: [PATCH] [ACM/Xen] Fix policy buffer layout changed with
On Tue, 2007-09-04 at 14:37 -0400, Stefan Berger wrote:
>
> "George S. Coker, II" <gscoker@xxxxxxxxxxxxxx> wrote on 09/04/2007
> 02:29:10 PM:
>
> > On Tue, 2007-09-04 at 10:57 -0400, Stefan Berger wrote:
> > > This fixes a regression due to changes in the policy buffer layout
> > > submitted by the XSM module.
> > >
> >
> > Hi Stefan,
> >
> > This was done to make the ACM magic number the first word in the
> policy
> > file. This seemed to be the logical choice to afford ACM the
> greatest
> > flexibility for loading policies under XSM. In principal, under
> XSM, a
> > security module could be capable of loading and parsing policies
> over a
> > range of policy versions.
>
> Did you adapt the tools to generate a binary policy in that form?
Yes, I did, so actually there would be more changes required should we
go forward. I apologize for the confusion.
>
> >
> > Your patch reverts the ACM module to the original form where the
> first
> > word of the policy file is the policy version - which could change
> over
> > time. This is the general problem of magic numbers.
>
> Yes, I changed it back because it was broken, at least it did not
> accept the policy I tried to load.
>
If you recompile your policy everything *should* work fine. If not, let
me know and I'll make it right.
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