diff options
| author | Li Zefan <lizefan@huawei.com> | 2013-04-18 09:47:21 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-04-23 17:18:04 +1000 |
| commit | 07ef83d3c4dd1570fcd2dbb13e7bd1dd92a07913 (patch) | |
| tree | a22c0f0c5a67ae0c38d4ec43f216722be368f0bc /mm | |
| parent | 492ad878cb2d975542a8b9a09d727f2bdc6e23b2 (diff) | |
memcg: avoid accessing memcg after releasing reference
This might cause a use-after-free bug.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: Glauber Costa <glommer@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 998576994e20..a8a69b4b8763 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3215,12 +3215,12 @@ 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); } |