[PATCH 1/5] device_cgroup: fix locking in devcgroup_destroy()

[Aristeu Rozanski]

Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx>
Signed-off-by: Aristeu Rozanski <aris@xxxxxxxxxx>
---
 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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