linux-kernel - Re: [PATCH -mm 2/8] memcg: keep all children of each root cache on a list

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 7 Jul 2014 10:24:35 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Vladimir Davydov <vdavydov@...allels.com>
cc:	akpm@...ux-foundation.org, mhocko@...e.cz, hannes@...xchg.org,
	glommer@...il.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 2/8] memcg: keep all children of each root cache on
 a list

On Mon, 7 Jul 2014, Vladimir Davydov wrote:

> diff --git a/mm/slab_common.c b/mm/slab_common.c
> index d31c4bacc6a2..95a8f772b0d1 100644
> --- a/mm/slab_common.c
> +++ b/mm/slab_common.c
> @@ -294,8 +294,12 @@ struct kmem_cache *memcg_create_kmem_cache(struct mem_cgroup *memcg,
>  	if (IS_ERR(s)) {
>  		kfree(cache_name);
>  		s = NULL;
> +		goto out_unlock;
>  	}
>
> +	list_add(&s->memcg_params->siblings,
> +		 &root_cache->memcg_params->children);
> +
>  out_unlock:
>  	mutex_unlock(&slab_mutex);
>

If there is an error then s is set to NULL. And then
the list_add is done dereferencing s?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/