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SubjectRe: [PATCH] cgroup: fail if monitored file and event_control are in different cgroup
On Mon, Feb 18, 2013 at 02:13:35PM +0800, Li Zefan wrote:
> If we pass fd of memory.usage_in_bytes of cgroup A to cgroup.event_control
> of cgroup B, then we won't get memory usage notification from A but B!
> What's worse, if A and B are in different mount hierarchy, we'll end up
> accessing NULL pointer!
> Disallow this kind of invalid usage.
> Signed-off-by: Li Zefan <>

Applied to cgroup/for-3.9.



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