nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
{
	if (!exp->ex_layout_types) {
		dprintk("%s: export does not support pNFS\n", __func__);
 		return NULL;
 	}
 
	if (!(exp->ex_layout_types & (1 << layout_type))) {
 		dprintk("%s: layout type %d not supported\n",
 			__func__, layout_type);
 		return NULL;
	}

	return nfsd4_layout_ops[layout_type];
}

The product does not release or incorrectly releases a resource before it is made available for re-use.