diff options
| -rw-r--r-- | hw/usb/hcd-xhci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index 2930b72c1d..9a942cfad4 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -2262,6 +2262,9 @@ static USBPort *xhci_lookup_uport(XHCIState *xhci, uint32_t *slot_ctx) int i, pos, port; port = (slot_ctx[1]>>16) & 0xFF; + if (port < 1 || port > xhci->numports) { + return NULL; + } port = xhci->ports[port-1].uport->index+1; pos = snprintf(path, sizeof(path), "%d", port); for (i = 0; i < 5; i++) { @@ -3706,6 +3709,12 @@ static int usb_xhci_post_load(void *opaque, int version_id) xhci_mask64(ldq_le_pci_dma(pci_dev, dcbaap + 8 * slotid)); xhci_dma_read_u32s(xhci, slot->ctx, slot_ctx, sizeof(slot_ctx)); slot->uport = xhci_lookup_uport(xhci, slot_ctx); + if (!slot->uport) { + /* should not happen, but may trigger on guest bugs */ + slot->enabled = 0; + slot->addressed = 0; + continue; + } assert(slot->uport && slot->uport->dev); for (epid = 1; epid <= 31; epid++) { |