[PATCH] selinux: return -ENOMEM if kzalloc() fails

[Tetsuo Handa]

Stephen Smalley wrote:
> On Fri, 2017-06-30 at 10:56 +0300, Dan Carpenter wrote:
> > We accidentally return success instead of -ENOMEM on this failure
> > path.
> > 
> > Fixes: 409dcf31538a ("selinux: Add a cache for quicker retreival of
> > PKey SIDs")
> > Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> 
> NAK, that's intentional.  See the comment just above the code in
> question.

If allocation failure is no problem, please consider using
GFP_NOWAIT | __GFP_NOMEMALLOC | __GFP_NOWARN instead of
GFP_ATOMIC, for memory reserves is mainly targeted for OOM victims.
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