The patch titled
Subject: mm: memcontrol: fix possible css ref leak on oom
has been added to the -mm tree. Its filename is
mm-memcontrol-fix-possible-css-ref-leak-on-oom.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-fix-possible-css-ref-leak-on-oom.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-fix-possible-css-ref-leak-on-oom.patch
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------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: mm: memcontrol: fix possible css ref leak on oom
mem_cgroup_oom may be invoked multiple times while a process is handling a
page fault, in which case current->memcg_in_oom will be overwritten
leaking the previously taken css reference.
Link: http://lkml.kernel.org/r/1464019330-7579-1-git-send-email-vdavydov@xxxxxxxxxxxxx
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/memcontrol.c~mm-memcontrol-fix-possible-css-ref-leak-on-oom mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-fix-possible-css-ref-leak-on-oom
+++ a/mm/memcontrol.c
@@ -1604,7 +1604,7 @@ static void memcg_oom_recover(struct mem
static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order)
{
- if (!current->memcg_may_oom)
+ if (!current->memcg_may_oom || current->memcg_in_oom)
return;
/*
* We are in the middle of the charge context here, so we
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
mm-memcontrol-fix-possible-css-ref-leak-on-oom.patch
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