Index: drivers/usb/usbhub/fdo.c
===================================================================
--- drivers/usb/usbhub/fdo.c	(revision 71259)
+++ drivers/usb/usbhub/fdo.c	(working copy)
@@ -1039,6 +1039,7 @@
             if (UsbChildExtension->usInstanceId.Buffer == NULL)
             {
                 DPRINT1("Error: failed to allocate %lu bytes\n", Index * sizeof(WCHAR));
+                ExFreePool(SerialBuffer);
                 return STATUS_INSUFFICIENT_RESOURCES;
             }