static int del_dac(struct task_struct *child, int slot)
{
	if (slot == 1) {
		if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0)
			return -ENOENT;

		child->thread.debug.dac1 = 0;
		dbcr_dac(child) &= ~(DBCR_DAC1R | DBCR_DAC1W);
#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
		if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {
			child->thread.debug.dac2 = 0;
			child->thread.debug.dbcr2 &= ~DBCR2_DAC12MODE;
		}
		child->thread.debug.dbcr2 &= ~(DBCR2_DVC1M | DBCR2_DVC1BE);
#endif
#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
		child->thread.debug.dvc1 = 0;
#endif
	} else if (slot == 2) {
		if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0)
			return -ENOENT;

#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE
		if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE)
			/* Part of a range */
			return -EINVAL;
		child->thread.debug.dbcr2 &= ~(DBCR2_DVC2M | DBCR2_DVC2BE);
#endif
#if CONFIG_PPC_ADV_DEBUG_DVCS > 0
		child->thread.debug.dvc2 = 0;
#endif
		child->thread.debug.dac2 = 0;
		dbcr_dac(child) &= ~(DBCR_DAC2R | DBCR_DAC2W);
	} else
		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.