On Tue, Dec 29, 2020 at 08:33:39AM -0800, syzbot wrote:
> > #syz test: upstream e37b12e4
>
> "upstream" does not look like a valid git repo address.

I thought syzbot had been changed to recognize "upstream" as a valid
repo name.

Alan Stern

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
e37b12e4

Index: usb-devel/drivers/usb/gadget/udc/dummy_hcd.c
===================================================================
--- usb-devel.orig/drivers/usb/gadget/udc/dummy_hcd.c
+++ usb-devel/drivers/usb/gadget/udc/dummy_hcd.c
@@ -2114,9 +2114,21 @@ static int dummy_hub_control(
                                dum_hcd->port_status &= ~USB_PORT_STAT_POWER;
                        set_link_state(dum_hcd);
                        break;
-               default:
+               case USB_PORT_FEAT_ENABLE:
+               case USB_PORT_FEAT_C_ENABLE:
+               case USB_PORT_FEAT_C_SUSPEND:
+                       /* Not allowed for USB-3 */
+                       if (hcd->speed == HCD_USB3)
+                               goto error;
+                       fallthrough;
+               case USB_PORT_FEAT_C_CONNECTION:
+               case USB_PORT_FEAT_C_RESET:
                        dum_hcd->port_status &= ~(1 << wValue);
                        set_link_state(dum_hcd);
+                       break;
+               default:
+               /* Disallow INDICATOR and C_OVER_CURRENT */
+                       goto error;
                }
                break;
        case GetHubDescriptor:
@@ -2277,18 +2289,17 @@ static int dummy_hub_control(
                         */
                        dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
                        fallthrough;
+               case USB_PORT_FEAT_C_CONNECTION:
+               case USB_PORT_FEAT_C_RESET:
+               case USB_PORT_FEAT_C_ENABLE:
+               case USB_PORT_FEAT_C_SUSPEND:
+                       /* Not allowed for USB-3, and ignored for USB-2 */
+                       if (hcd->speed == HCD_USB3)
+                               goto error;
+                       break;
                default:
-                       if (hcd->speed == HCD_USB3) {
-                               if ((dum_hcd->port_status &
-                                    USB_SS_PORT_STAT_POWER) != 0) {
-                                       dum_hcd->port_status |= (1 << wValue);
-                               }
-                       } else
-                               if ((dum_hcd->port_status &
-                                    USB_PORT_STAT_POWER) != 0) {
-                                       dum_hcd->port_status |= (1 << wValue);
-                               }
-                       set_link_state(dum_hcd);
+               /* Disallow TEST, INDICATOR, and C_OVER_CURRENT */
+                       goto error;
                }
                break;
        case GetPortErrorCount:

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