static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
					    int *bytes, int *pkts)
{
	struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];

	(*pkts) += (desc_cb->type == DESC_TYPE_SKB);
	(*bytes) += desc_cb->length;
	/* desc_cb will be cleaned, after hnae_free_buffer_detach*/
	hnae_free_buffer_detach(ring, ring->next_to_clean);

	ring_ptr_move_fw(ring, next_to_clean);
}

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.