Re: Force avc_has_perm to return success if enforcing == 0;

[Stephen Smalley <sds@tycho.nsa.gov>]

On Tue, 2012-02-14 at 16:22 -0500, Daniel J Walsh wrote:
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> I would like to patch libselinux to always return 0 on avc_has_perm if
> the machine is in permissive mode.
> 
> This will allow Userspace Object Managers to work even if the system
> is totally mislabeled and processes as running with bad context.
> Currently if a program like dbus asks with a bad process label it can
> get denials even in permissive mode.
> 
> Does anyone see a problem with this?

I'm not fond of it.  Permissive mode is just supposed to control whether
permission is granted, not to hide other kinds of errors.  Consider how
difficult debugging of an actual failure will be if it only shows up in
enforcing mode even though it has nothing to do with policy.

-- 
Stephen Smalley
National Security Agency


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