+It seems that vhci_driver should use its own udev_context instance, not the one from usbip_host_common.c
+--- linux-5.7/tools/usb/usbip/libsrc/vhci_driver.c.orig 2020-06-01 01:49:15.000000000 +0200
++++ linux-5.7/tools/usb/usbip/libsrc/vhci_driver.c 2020-06-21 16:02:34.325318086 +0200
+@@ -15,7 +15,7 @@
+ #define PROGNAME "libusbip"
+
+ struct usbip_vhci_driver *vhci_driver;
+-struct udev *udev_context;
++static struct udev *udev_context = NULL;
+
+ static struct usbip_imported_device *
+ imported_device_init(struct usbip_imported_device *idev, char *busid)