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    SubjectRe: [PATCH 2/2] ima: Support appraise_type=imasig_optional
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    On Wed, 2013-02-13 at 10:30 -0500, Vivek Goyal wrote:
    > On Wed, Feb 13, 2013 at 05:26:27PM +0200, Kasatkin, Dmitry wrote:
    > > On Wed, Feb 13, 2013 at 4:38 PM, Vivek Goyal <vgoyal@redhat.com> wrote:
    > > > On Wed, Feb 13, 2013 at 03:36:45PM +0200, Kasatkin, Dmitry wrote:
    > > >> It should not be the only line in the policy.
    > > >> Can you share full policy?
    > > >
    > > > I verified by putting some printk. There is only single rule in
    > > > ima_policy_rules list after I have updated the rules through "policy"
    > > > file.
    > > >
    > > > echo "appraise fowner=0 func=BPRM_CHECK appraise_type=imasig_optional" >
    > > > /sys/kernel/security/policy
    > >
    > > There is a default policy which has several rules.
    > >
    > > And when you do your "echo" you will replace all rules with that single rule.
    > > But ok, you have one rule only and it is fine to have even a single rule...
    >
    > Yep, I got that. Default policy gets overruled when a new policy is
    > loaded.
    >
    > In secureboot mode, somehow above rule needs to take effect by default.
    > One option would be that kernel can enforce above rule.
    > (I guess by adding it to both default_list as well as policy list).

    The default policy is empty, but can be replaced with boot command line
    options. The existing options are ima_tcb and/ ima_appraise_tcb.
    Please feel free to define an additional policy.

    thanks,

    Mimi



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