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

[Paul Moore]

On Fri, Jun 30, 2017 at 9:10 AM, Tetsuo Handa
<penguin-kernel at i-love.sakura.ne.jp> wrote:
> 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.

I have a todo item to try and consolidate some of the SELinux object
cache code, this seems like something worth experimenting with when
that happens.

-- 
paul moore
www.paul-moore.com
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