From: Muchun Song <[email protected]> commit 3a98990ae2150277ed34d3b248c60e68bf2244b2 upstream.
We should put the css reference when memory allocation failed. Link: http://lkml.kernel.org/r/[email protected] Fixes: f0a3a24b532d ("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]> --- mm/memcontrol.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 1b05e25d8aef2..ef0e291a8cf46 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2790,8 +2790,10 @@ 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; -- 2.25.1
