static inline void tg3_tx_set_bd(struct tg3_tx_buffer_desc *txbd,
				 dma_addr_t mapping, u32 len, u32 flags,
				 u32 mss, u32 vlan)
{
	txbd->addr_hi = ((u64) mapping >> 32);
	txbd->addr_lo = ((u64) mapping & 0xffffffff);
	txbd->len_flags = (len << TXD_LEN_SHIFT) | (flags & 0x0000ffff);
	txbd->vlan_tag = (mss << TXD_MSS_SHIFT) | (vlan << TXD_VLAN_TAG_SHIFT);
}

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.