3.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tejun Heo <t...@kernel.org>
commit b58c89986a77a23658682a100eb15d8edb571ebb upstream.
cgroup_create() was returning 0 after allocation failures. Fix it.
Signed-off-by: Tejun Heo <t...@kernel.org>
Acked-by: Li Zefan <lize...@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
kernel/cgroup.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4348,7 +4348,7 @@ static long cgroup_create(struct cgroup
struct cgroup *cgrp;
struct cgroup_name *name;
struct cgroupfs_root *root = parent->root;
- int err = 0;
+ int err;
struct cgroup_subsys *ss;
struct super_block *sb = root->sb;
@@ -4358,8 +4358,10 @@ static long cgroup_create(struct cgroup
return -ENOMEM;
name = cgroup_alloc_name(dentry);
- if (!name)
+ if (!name) {
+ err = -ENOMEM;
goto err_free_cgrp;
+ }
rcu_assign_pointer(cgrp->name, name);
/*
@@ -4367,8 +4369,10 @@ static long cgroup_create(struct cgroup
* a half-baked cgroup.
*/
cgrp->id = idr_alloc(&root->cgroup_idr, NULL, 1, 0, GFP_KERNEL);
- if (cgrp->id < 0)
+ if (cgrp->id < 0) {
+ err = -ENOMEM;
goto err_free_name;
+ }
/*
* Only live parents can have children. Note that the liveliness
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