static void destroy_qp_user(struct mlx5_ib_dev *dev, struct ib_pd *pd,
			    struct mlx5_ib_qp *qp, struct mlx5_ib_qp_base *base)
{
	struct mlx5_ib_ucontext *context;

	context = to_mucontext(pd->uobject->context);
	mlx5_ib_db_unmap_user(context, &qp->db);
	if (base->ubuffer.umem)
		ib_umem_release(base->ubuffer.umem);

	/*
	 * Free only the BFREGs which are handled by the kernel.
	 * BFREGs of UARs allocated dynamically are handled by user.
	 */
	if (qp->bfregn != MLX5_IB_INVALID_BFREG)
		mlx5_ib_free_bfreg(dev, &context->bfregi, qp->bfregn);
}

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.