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Message-ID: <516264AF.1040906@huawei.com> Date: Mon, 8 Apr 2013 14:33:19 +0800 From: Li Zefan <lizefan@...wei.com> To: Andrew Morton <akpm@...ux-foundation.org> CC: Tejun Heo <tj@...nel.org>, Glauber Costa <glommer@...allels.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Johannes Weiner <hannes@...xchg.org>, LKML <linux-kernel@...r.kernel.org>, Cgroups <cgroups@...r.kernel.org>, <linux-mm@...ck.org> Subject: [PATCH 02/12] memcg: avoid accessing memcg after releasing reference This might cause use-after-free bug. Signed-off-by: Li Zefan <lizefan@...wei.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Acked-by: Michal Hocko <mhocko@...e.cz> --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e054ac0..2364f4e 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3192,12 +3192,12 @@ void memcg_release_cache(struct kmem_cache *s) root = s->memcg_params->root_cache; root->memcg_params->memcg_caches[id] = NULL; - mem_cgroup_put(memcg); mutex_lock(&memcg->slab_caches_mutex); list_del(&s->memcg_params->list); mutex_unlock(&memcg->slab_caches_mutex); + mem_cgroup_put(memcg); out: kfree(s->memcg_params); } -- 1.8.0.2 -- 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/
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