static struct ctl_table_header *grab_header(struct inode *inode)
{
	struct ctl_table_header *head = PROC_I(inode)->sysctl;
	if (!head)
		head = &sysctl_table_root.default_set.dir.header;
	return sysctl_head_grab(head);
}

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.