static int proc_sys_open(struct inode *inode, struct file *filp)
{
	struct ctl_table_header *head = grab_header(inode);
	struct ctl_table *table = PROC_I(inode)->sysctl_entry;

	/* sysctl was unregistered */
	if (IS_ERR(head))
		return PTR_ERR(head);

	if (table->poll)
		filp->private_data = proc_sys_poll_event(table->poll);

	sysctl_head_finish(head);

	return 0;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.