static int pmcraid_chr_open(struct inode *inode, struct file *filep)
{
	struct pmcraid_instance *pinstance;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	/* Populate adapter instance * pointer for use by ioctl */
	pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
	filep->private_data = pinstance;

	return 0;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.