The patch titled
memcg: use rcu_dereference to access mm->owner
has been added to the -mm tree. Its filename is
memcg-use-rcu_dereference-to-access-mm-owner.patch
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------------------------------------------------------
Subject: memcg: use rcu_dereference to access mm->owner
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
mm->owner should be accessed with rcu_dereference().
Reported-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Acked-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/memcontrol.h~memcg-use-rcu_dereference-to-access-mm-owner include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~memcg-use-rcu_dereference-to-access-mm-owner
+++ a/include/linux/memcontrol.h
@@ -75,7 +75,7 @@ int mm_match_cgroup(const struct mm_stru
{
struct mem_cgroup *mem;
rcu_read_lock();
- mem = mem_cgroup_from_task((mm)->owner);
+ mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
rcu_read_unlock();
return cgroup == mem;
}
_
Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are
memcg-use-rcu_dereference-to-access-mm-owner.patch
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