Commit 3a98990a authored by Muchun Song's avatar Muchun Song Committed by Linus Torvalds
Browse files

mm/memcontrol.c: add missed css_put()

We should put the css reference when memory allocation failed.

Link: http://lkml.kernel.org/r/20200614122653.98829-1-songmuchun@bytedance.com
Fixes: f0a3a24b

 ("mm: memcg/slab: rework non-root kmem_cache lifecycle management")
Signed-off-by: default avatarMuchun Song <songmuchun@bytedance.com>
Acked-by: default avatarRoman Gushchin <guro@fb.com>
Acked-by: default avatarMichal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Qian Cai <cai@lca.pw>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cd324edc
......@@ -2772,8 +2772,10 @@ static void memcg_schedule_kmem_cache_create(struct mem_cgroup *memcg,
return;
cw = kmalloc(sizeof(*cw), GFP_NOWAIT | __GFP_NOWARN);
if (!cw)
if (!cw) {
css_put(&memcg->css);
return;
}
cw->memcg = memcg;
cw->cachep = cachep;
......
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