On Thu, Sep 18, 2014 at 05:28:46PM +0800, Zefan Li wrote:

cgroup_pidlist_start() holds cgrp->pidlist_mutex and then calls
pidlist_array_load(), and cgroup_pidlist_stop() releases the mutex.

It is wrong that we release the mutex in the failure path in
pidlist_array_load(), because cgroup_pidlist_stop() will be called
no matter if cgroup_pidlist_start() returns errno or not.

Fixes: 4bac00d16a8760eae7205e41d2c246477d42a210
Cc: <redacted> # 3.14+
Signed-off-by: Zefan Li <redacted>

Applied to cgroup/for-3.17-fixes.

Thanks.

-- 
tejun