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-rw-r--r--kernel/cgroup.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index fede3d3f28ff..0dfc7324c789 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1487,6 +1487,7 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type,
struct cgroup_sb_opts opts;
struct dentry *dentry;
int ret;
+ bool new_sb;
/*
* The first time anyone tries to mount a cgroup, enable the list
@@ -1603,8 +1604,8 @@ out_unlock:
if (ret)
return ERR_PTR(ret);
- dentry = kernfs_mount(fs_type, flags, root->kf_root, NULL);
- if (IS_ERR(dentry))
+ dentry = kernfs_mount(fs_type, flags, root->kf_root, &new_sb);
+ if (IS_ERR(dentry) || !new_sb)
cgroup_put(&root->cgrp);
return dentry;
}