[RFC PATCH 1/5] ima: extend clone() with IMA namespace support

[Serge E. Hallyn]

On Thu, Jul 20, 2017 at 06:50:29PM -0400, Mehmet Kayaalp wrote:
> From: Yuqiong Sun <suny at us.ibm.com>
> 
> Add new CONFIG_IMA_NS config option.  Let clone() create a new IMA
> namespace upon CLONE_NEWNS flag. Add ima_ns data structure in nsproxy.
> ima_ns is allocated and freed upon IMA namespace creation and exit.
> Currently, the ima_ns contains no useful IMA data but only a dummy
> interface. This patch creates the framework for namespacing the different
> aspects of IMA (eg. IMA-audit, IMA-measurement, IMA-appraisal).
> 
> Signed-off-by: Yuqiong Sun <suny at us.ibm.com>
> 
> Changelog:
> * Use CLONE_NEWNS instead of a new CLONE_NEWIMA flag

Hi,

So this means that every mount namespace clone will clone a new IMA
namespace.  Is that really ok?
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