1 files changed, 7 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 900812f..8b34a97 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1477,8 +1477,14 @@ struct vfsmount *collect_mounts(struct path *path)
 {
 	struct vfsmount *tree;
 	down_write(&namespace_sem);
-	tree = copy_tree(path->mnt, path->dentry, CL_COPY_ALL | CL_PRIVATE);
+	if (!check_mnt(path->mnt))
+		tree = ERR_PTR(-EINVAL);
+	else
+		tree = copy_tree(path->mnt, path->dentry,
+				 CL_COPY_ALL | CL_PRIVATE);
 	up_write(&namespace_sem);
+	if (IS_ERR(tree))
+		return NULL;
 	return tree;
 }