Re: [PATCH -mm] memcg: fix possible use-after-free in memcg_kmem_get_cache

[Christoph Lameter]

On Sun, 7 Dec 2014, Vladimir Davydov wrote:

> diff --git a/mm/slub.c b/mm/slub.c
> index 95d214255663..7ddf01e2a465 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -2450,6 +2450,7 @@ redo:
>
>  	slab_post_alloc_hook(s, gfpflags, object);
>
> +	memcg_kmem_put_cache(s);
>  	return object;
>  }

The function should be added to slab_post_alloc().

Also move the memcg_kmem_get_cache() into slab_pre_alloc_hook().

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