static long ppc_del_hwdebug(struct task_struct *child, long data)
{
#ifdef CONFIG_HAVE_HW_BREAKPOINT
	int ret = 0;
	struct thread_struct *thread = &(child->thread);
	struct perf_event *bp;
#endif /* CONFIG_HAVE_HW_BREAKPOINT */
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
	int rc;

	if (data <= 4)
		rc = del_instruction_bp(child, (int)data);
	else
		rc = del_dac(child, (int)data - 4);

	if (!rc) {
		if (!DBCR_ACTIVE_EVENTS(child->thread.debug.dbcr0,
					child->thread.debug.dbcr1)) {
			child->thread.debug.dbcr0 &= ~DBCR0_IDM;
			child->thread.regs->msr &= ~MSR_DE;
		}
	}
	return rc;
#else
	if (data != 1)
		return -EINVAL;

#ifdef CONFIG_HAVE_HW_BREAKPOINT
	bp = thread->ptrace_bps[0];
	if (bp) {
		unregister_hw_breakpoint(bp);
		thread->ptrace_bps[0] = NULL;
	} else
		ret = -ENOENT;
	return ret;
#else /* CONFIG_HAVE_HW_BREAKPOINT */
	if (child->thread.hw_brk.address == 0)
		return -ENOENT;

	child->thread.hw_brk.address = 0;
	child->thread.hw_brk.type = 0;
#endif /* CONFIG_HAVE_HW_BREAKPOINT */

	return 0;
#endif
}

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.