[libusb] Getting IO error from libusb when trying to access a passed-through device

[Martin R. <spl...@gm...>]

Hiya,
first of all, sorry for such a question but I am totally new to this
(libusb, reversing protocols and C++).

I've decided to reverse a driver for the mouse I bought, and I got to
a point where I have a working VM with proprietary drivers I'm trying
to reverse and wireshark works to see what's happening on USB.

I've found a project that works with different mice of the same
manufacturer and adapted it so it works for my own device.

My issue is that __I can only run this program while the device is not
passed through__, if I do I get what seems to be an IO error.

libusb: error [submit_control_transfer] submiturb failed error -1 errno=16

This, of course, makes debugging extremely hard.

I'd welcome any help or pointers on how to fix the issue so I can send
custom commands to the mouse while also having it work with the
proprietary drivers at the same time.

All the code is in
https://github.com/C0rn3j/a4tech-bloody-linux-driver , files of
interest are Mouse.cpp, Mouse.h and main.cpp.