Commit e638c139 authored Apr 21, 2009 by KAMEZAWA Hiroyuki Committed by Linus Torvalds Apr 21, 2009

memcg: use rcu_dereference to access mm->owner



mm->owner should be accessed with rcu_dereference().

Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent c12ddba0

include/linux/memcontrol.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -75,7 +75,7 @@ int mm_match_cgroup(const struct mm_struct mm, const struct mem_cgroup cgroup)
		{
		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;
		}