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cgroup: fix error return from cgroup_create() 

cgroup_create() was returning 0 after allocation failures.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Tejun Heo 2014-02-08 10:26:33 -05:00
parent eb46bf8969
commit b58c89986a
1 changed files with 7 additions and 3 deletions
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10
kernel/cgroup.c
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@ -4158,7 +4158,7 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
struct cgroup *cgrp;
struct cgroup_name *name;
struct cgroupfs_root *root = parent->root;
int ssid, err = 0;
int ssid, err;
struct cgroup_subsys *ss;
struct super_block *sb = root->sb;
@ -4168,8 +4168,10 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
return -ENOMEM;
name = cgroup_alloc_name(dentry);
if (!name)
if (!name) {
err = -ENOMEM;
goto err_free_cgrp;
}
rcu_assign_pointer(cgrp->name, name);
/*
@ -4177,8 +4179,10 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
* 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