[PATCH 1/7] cgroup: fix a leak when percpu_ref_init() fails

[Li Zefan <lizefan@huawei.com>]

ss->css_free() is not called when perfcpu_ref_init() fails.

Signed-off-by: Li Zefan <lizefan@huawei.com>
---
 kernel/cgroup.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index a64b7b8..e60eba2 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4274,8 +4274,10 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
 		}
 
 		err = percpu_ref_init(&css->refcnt, css_release);
-		if (err)
+		if (err) {
+			ss->css_free(cgrp);
 			goto err_free_all;
+		}
 
 		init_cgroup_css(css, ss, cgrp);
 	}
-- 
1.8.0.2