Thread (45 messages) 45 messages, 4 authors, 2018-09-21

[PATCH security-next v2 26/26] LSM: Add all exclusive LSMs to ordered initialization

From: casey@schaufler-ca.com (Casey Schaufler)
Date: 2018-09-21 01:10:38
Also in: linux-arch, linux-doc, lkml

On 9/20/2018 5:45 PM, Kees Cook wrote:
On Thu, Sep 20, 2018 at 5:25 PM, Casey Schaufler [off-list ref] wrote:
quoted
On 9/20/2018 9:23 AM, Kees Cook wrote:
quoted
 config LSM_ORDER
      string "Default initialization order of builtin LSMs"
-     default "yama,loadpin,integrity"
+     default "yama,loadpin,integrity,selinux,smack,tomoyo,apparmor"
If I want to compile all the major modules into my kernel and use
AppArmor by default would I use

        default "yama,loadpin,integrity,apparmor,selinux,smack,tomoyo"

or

        default "yama,loadpin,integrity,apparmor"
I was expecting the former, but the latter will have the same result.
quoted
When we have "blob-sharing" how could I compile in tomoyo,
but exclude it without a boot line option?
Ooh, yes, this series has no way to do that. Perhaps
CONFIG_LSM_DISABLE in the same form as CONFIG_LSM_ORDER? I would
totally remove LoadPin's CONFIG for this in favor it.
I would generally prefer an optional CONFIG_LSM_ENABLE to
CONFIG_LSM_DISABLE, but I understand the logic behind your
approach. I would be looking for something like

CONFIG LSM_ENABLE
	string "Default set of enabled LSMs"
	default ""

as opposed to

CONFIG LSM_DISABLE
	string "Default set of disabled LSMs"
	default ""

where an empty string is interpreted as "use 'em all" 
in either case.
quoted
When we have full stacking, how could I compile in selinux
but exclude it?
Yup, same problem. Same suggested solution?

Should lsm.enable/disable= also become a comma-separated list, or
should I leave it as a multi-instance thing like I have it?
I prefer the multi-instance
	lsm.disable=selinux lsm.disable=yama
to the list
	lsm.disable=selinux,yama

but at this point I don't really care all that much.
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