void oz_cdev_stop(struct oz_pd *pd, int pause)
{
	struct oz_serial_ctx *ctx;

	if (pause) {
		oz_dbg(ON, "Serial service paused\n");
		return;
	}
	spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
	ctx = (struct oz_serial_ctx *)pd->app_ctx[OZ_APPID_SERIAL-1];
	pd->app_ctx[OZ_APPID_SERIAL-1] = NULL;
	spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
	if (ctx)
		oz_cdev_release_ctx(ctx);
	spin_lock(&g_cdev.lock);
	if (pd == g_cdev.active_pd)
		g_cdev.active_pd = NULL;
	else
		pd = NULL;
	spin_unlock(&g_cdev.lock);
	if (pd) {
		oz_pd_put(pd);
		oz_dbg(ON, "Active PD departed\n");
	}
	oz_dbg(ON, "Serial service stopped\n");
}

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.