[PATCH 1/1] cgroup_release_agent: grab css_set_lock around cgroup_path()

[Serge Hallyn]

Reported-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Signed-off-by: Serge Hallyn <serge.hallyn@xxxxxxxxxx>
---
 kernel/cgroup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 4812f59..d10f127 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5769,7 +5769,9 @@ static void cgroup_release_agent(struct work_struct *work)
 	if (!pathbuf || !agentbuf)
 		goto out;
 
+	spin_lock_bh(&css_set_lock);
 	path = cgroup_path(cgrp, pathbuf, PATH_MAX);
+	spin_unlock_bh(&css_set_lock);
 	if (!path)
 		goto out;
 
-- 
2.5.0

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