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mm/memcontrol.c: add missed css_put()

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commit 3a98990ae2150277ed34d3b248c60e68bf2244b2 upstream.

We should put the css reference when memory allocation failed.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: f0a3a24b53 ("mm: memcg/slab: rework non-root kmem_cache lifecycle management")
Signed-off-by: Muchun Song <[email protected]>
Acked-by: Roman Gushchin <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Muchun Song 2020-06-25 20:30:19 -07:00 • committed by Sasha Levin
commit 7a9e3e25a9
1 changed files with 3 additions and 1 deletions
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4
mm/memcontrol.c
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@ -2895,8 +2895,10 @@ 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;