static int del_instruction_bp(struct task_struct *child, int slot)
{
	switch (slot) {
	case 1:
		if ((child->thread.debug.dbcr0 & DBCR0_IAC1) == 0)
			return -ENOENT;

		if (dbcr_iac_range(child) & DBCR_IAC12MODE) {
			/* address range - clear slots 1 & 2 */
			child->thread.debug.iac2 = 0;
			dbcr_iac_range(child) &= ~DBCR_IAC12MODE;
		}
		child->thread.debug.iac1 = 0;
		child->thread.debug.dbcr0 &= ~DBCR0_IAC1;
		break;
	case 2:
		if ((child->thread.debug.dbcr0 & DBCR0_IAC2) == 0)
			return -ENOENT;

		if (dbcr_iac_range(child) & DBCR_IAC12MODE)
			/* used in a range */
			return -EINVAL;
		child->thread.debug.iac2 = 0;
		child->thread.debug.dbcr0 &= ~DBCR0_IAC2;
		break;
#if CONFIG_PPC_ADV_DEBUG_IACS > 2
	case 3:
		if ((child->thread.debug.dbcr0 & DBCR0_IAC3) == 0)
			return -ENOENT;

		if (dbcr_iac_range(child) & DBCR_IAC34MODE) {
			/* address range - clear slots 3 & 4 */
			child->thread.debug.iac4 = 0;
			dbcr_iac_range(child) &= ~DBCR_IAC34MODE;
		}
		child->thread.debug.iac3 = 0;
		child->thread.debug.dbcr0 &= ~DBCR0_IAC3;
		break;
	case 4:
		if ((child->thread.debug.dbcr0 & DBCR0_IAC4) == 0)
			return -ENOENT;

		if (dbcr_iac_range(child) & DBCR_IAC34MODE)
			/* Used in a range */
			return -EINVAL;
		child->thread.debug.iac4 = 0;
		child->thread.debug.dbcr0 &= ~DBCR0_IAC4;
		break;
#endif
	default:
		return -EINVAL;
	}
	return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.