提交 3eb59ec6 编写于 作者: L Li Zefan 提交者: Tejun Heo

cgroup: fix a failure path in create_css()

If online_css() fails, we should remove cgroup files belonging
to css->ss.
Signed-off-by: NLi Zefan <lizefan@huawei.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
上级 99afb0fd
......@@ -4112,17 +4112,17 @@ static int create_css(struct cgroup *cgrp, struct cgroup_subsys *ss)
err = percpu_ref_init(&css->refcnt, css_release);
if (err)
goto err_free;
goto err_free_css;
init_css(css, ss, cgrp);
err = cgroup_populate_dir(cgrp, 1 << ss->subsys_id);
if (err)
goto err_free;
goto err_free_percpu_ref;
err = online_css(css);
if (err)
goto err_free;
goto err_clear_dir;
dget(cgrp->dentry);
css_get(css->parent);
......@@ -4138,8 +4138,11 @@ static int create_css(struct cgroup *cgrp, struct cgroup_subsys *ss)
return 0;
err_free:
err_clear_dir:
cgroup_clear_dir(css->cgroup, 1 << css->ss->subsys_id);
err_free_percpu_ref:
percpu_ref_cancel_init(&css->refcnt);
err_free_css:
ss->css_free(css);
return err;
}
......
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