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From: Tejun Heo <tj@kernel.org>
To: Li Zefan <lizefan@huawei.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
	LKML <linux-kernel@vger.kernel.org>,
	Cgroups <cgroups@vger.kernel.org>
Subject: Re: [PATCH] cgroup: fail if monitored file and event_control are in different cgroup
Date: Mon, 18 Feb 2013 09:32:18 -0800	[thread overview]
Message-ID: <20130218173218.GH17414@htj.dyndns.org> (raw)
In-Reply-To: <5121C68F.1000309@huawei.com>

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 <lizefan@huawei.com>

Applied to cgroup/for-3.9.

Thanks.

-- 
tejun

      parent reply	other threads:[~2013-02-18 17:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-18  6:13 [PATCH] cgroup: fail if monitored file and event_control are in different cgroup Li Zefan
2013-02-18 10:24 ` Kirill A. Shutemov
2013-02-18 17:32 ` Tejun Heo [this message]

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