linux-kernel - Re: [PATCH 1/5] device_cgroup: fix locking in devcgroup

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Date:	Thu, 29 Nov 2012 19:06:26 +0000
From:	"Serge E. Hallyn" <serge@...lyn.com>
To:	Aristeu Rozanski <aris@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	cgroups@...r.kernel.org
Subject: Re: [PATCH 1/5] device_cgroup: fix locking in devcgroup_destroy()

Quoting Aristeu Rozanski (aris@...hat.com):
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Serge Hallyn <serge.hallyn@...onical.com>

Acked-by: Serge Hallyn <serge.hallyn@...onical.com>

> Signed-off-by: Aristeu Rozanski <aris@...hat.com>
> ---
>  security/device_cgroup.c |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> Index: github/security/device_cgroup.c
> ===================================================================
> --- github.orig/security/device_cgroup.c	2012-11-26 17:13:54.008153189 -0500
> +++ github/security/device_cgroup.c	2012-11-27 11:58:43.574251075 -0500
> @@ -215,7 +215,11 @@
>  	struct dev_cgroup *dev_cgroup;
>  
>  	dev_cgroup = cgroup_to_devcgroup(cgroup);
> +
> +	mutex_lock(&devcgroup_mutex);
>  	dev_exception_clean(dev_cgroup);
> +	mutex_unlock(&devcgroup_mutex);
> +
>  	kfree(dev_cgroup);
>  }
>  
> 
> --
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