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authorLi Zefan <lizefan@huawei.com>2014-03-18 10:02:36 +0100
committerTejun Heo <tj@kernel.org>2014-03-18 22:15:36 +0100
commit3eb59ec64fc7a3f4576da23f811b39331b830ba2 (patch)
tree600d9c6c0b0d75017cc373a6262bc27d4836ce8d /kernel
parentcpuset: fix a race condition in __cpuset_node_allowed_softwall() (diff)
downloadlinux-3eb59ec64fc7a3f4576da23f811b39331b830ba2.tar.xz
linux-3eb59ec64fc7a3f4576da23f811b39331b830ba2.zip
cgroup: fix a failure path in create_css()
If online_css() fails, we should remove cgroup files belonging to css->ss. Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cgroup.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 105f273b6f86..0c753ddd223b 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -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;
}