The patch titled Subject: mm/memcontrol.c: add missed css_put() has been added to the -mm tree. Its filename is mm-memcontrol-fix-do-not-put-the-css-reference.patch

This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-fix-do-not-put-the-cs... and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-fix-do-not-put-the-cs...

Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated there every 3-4 working days

------------------------------------------------------ From: Muchun Song songmuchun@bytedance.com Subject: 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: f0a3a24b532d ("mm: memcg/slab: rework non-root kmem_cache lifecycle management") Signed-off-by: Muchun Song songmuchun@bytedance.com Acked-by: Roman Gushchin guro@fb.com Acked-by: Michal 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: Andrew Morton akpm@linux-foundation.org ---

mm/memcontrol.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/mm/memcontrol.c~mm-memcontrol-fix-do-not-put-the-css-reference +++ a/mm/memcontrol.c @@ -2772,8 +2772,10 @@ static void memcg_schedule_kmem_cache_cr return;

cw = kmalloc(sizeof(*cw), GFP_NOWAIT | __GFP_NOWARN); - if (!cw) + if (!cw) { + css_put(&memcg->css); return; + }

cw->memcg = memcg; cw->cachep = cachep; _

Patches currently in -mm which might be from songmuchun@bytedance.com are

mm-memcontrol-fix-do-not-put-the-css-reference.patch