static void xhci_er_reset(XHCIState *xhci, int v)
{
    XHCIInterrupter *intr = &xhci->intr[v];
    XHCIEvRingSeg seg;

    if (intr->erstsz == 0) {
        /* disabled */
        intr->er_start = 0;
        intr->er_size = 0;
        return;
    }
    /* cache the (sole) event ring segment location */
    if (intr->erstsz != 1) {
        DPRINTF("xhci: invalid value for ERSTSZ: %d\n", intr->erstsz);
        xhci_die(xhci);
        return;
    }
    dma_addr_t erstba = xhci_addr64(intr->erstba_low, intr->erstba_high);
    pci_dma_read(PCI_DEVICE(xhci), erstba, &seg, sizeof(seg));
    le32_to_cpus(&seg.addr_low);
    le32_to_cpus(&seg.addr_high);
    le32_to_cpus(&seg.size);
    if (seg.size < 16 || seg.size > 4096) {
        DPRINTF("xhci: invalid value for segment size: %d\n", seg.size);
        xhci_die(xhci);
        return;
    }
    intr->er_start = xhci_addr64(seg.addr_low, seg.addr_high);
    intr->er_size = seg.size;

    intr->er_ep_idx = 0;
    intr->er_pcs = 1;
    intr->er_full = 0;

    DPRINTF("xhci: event ring[%d]:" DMA_ADDR_FMT " [%d]\n",
            v, intr->er_start, intr->er_size);
}

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.