static int prb_curr_blk_in_use(struct tpacket_kbdq_core *pkc,
				      struct tpacket_block_desc *pbd)
{
	return TP_STATUS_USER & BLOCK_STATUS(pbd);
}

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.