diff options
| author | Zefan Li <lizefan@huawei.com> | 2014-09-18 17:28:46 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-05 13:41:03 -0700 |
| commit | e8c35a7604d19cd4f9b3ff4015faab8acb7b782c (patch) | |
| tree | df7d554aead9d00f55b530fdf8ea04c144a6c9c6 /kernel | |
| parent | 7d73a89ba1408035381e19a0e890a4aaf15d0ec5 (diff) | |
cgroup: fix unbalanced locking
commit eb4aec84d6bdf98d00cedb41c18000f7a31e648a upstream.
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
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cgroup.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 8fe20392e0c7..0a46b2aa9dfb 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -3833,7 +3833,6 @@ static int pidlist_array_load(struct cgroup *cgrp, enum cgroup_filetype type, l = cgroup_pidlist_find_create(cgrp, type); if (!l) { - mutex_unlock(&cgrp->pidlist_mutex); pidlist_free(array); return -ENOMEM; } |