Hi! Sorry if you have received this email twice. My first email contained html and was not accepted by the mailing list. I think I have found a race condition which can be triggered for example when calling two usbip attach commands in parallel on the same host. In file linux/tools/usb/usbip/src /usbip_attach.c: In function static int import_device(int sockfd, struct usbip_usb_device *udev): At first two processes may call usbip_vhci_driver_open() before entering the do-while loop. Next they both call usbip_vhci_get_free_port() and get the same free port. Finally, they pass the same port number to usbip_vhci_attach_device(). Current recommendation to end users: run usbip attach commands only sequentially. Best, Alexander Timofeev
