static int copyin()

in char/openprom.c [60:88]

• 20 lines of code
• 8 McCabe index (conditional complexity)

static int copyin(struct openpromio __user *info, struct openpromio **opp_p)
{
	unsigned int bufsize;

	if (!info || !opp_p)
		return -EFAULT;

	if (get_user(bufsize, &info->oprom_size))
		return -EFAULT;

	if (bufsize == 0)
		return -EINVAL;

	/* If the bufsize is too large, just limit it.
	 * Fix from Jason Rappleye.
	 */
	if (bufsize > OPROMMAXPARAM)
		bufsize = OPROMMAXPARAM;

	if (!(*opp_p = kzalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
		return -ENOMEM;

	if (copy_from_user(&(*opp_p)->oprom_array,
			   &info->oprom_array, bufsize)) {
		kfree(*opp_p);
		return -EFAULT;
	}
	return bufsize;
}