ehci: add sanity check for maxframes

Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20170703111549.10924-1-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-07-17 11:39:08 +02:00
1 changed files with 5 additions and 0 deletions
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -2483,6 +2483,11 @@ void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp)
                   NB_PORTS);
        return;
    }
+    if (s->maxframes < 8 || s->maxframes > 512)  {
+        error_setg(errp, "maxframes %d out if range (8 .. 512)",
+                   s->maxframes);
+        return;
+    }

    usb_bus_new(&s->bus, sizeof(s->bus), s->companion_enable ?
                &ehci_bus_ops_companion : &ehci_bus_ops_standalone, dev);