qemu-arm-static ioctl USBDEVFS_BULK return -1 (EFAULT) Bad address Snippet of code sample: struct usbdevfs_bulktransfer Bulk; Bulk.ep = hUsb->UsbOut; Bulk.len = Len; Bulk.data = (void *)pData; Bulk.timeout = Timeout; Bytes = ioctl(hUsb->fd, USBDEVFS_BULK, &Bulk) The above code sample return -1 (EFAULT) Bad address when using qemu-arm-static but is running ok when on qemu-aarch64-static. I use a 64-bit intel laptop