Segfault with Kernel 5.15

[sHorst]

I tried to adapt the Driver to Kernel 5.15. My fork can be found here: https://github.com/sHorst/socketcan-linux-5.0

It does compile, but will segfault on bringing the can0 Interface up.

I narrowed the bug down to ixx_usb_core.c Line 403. https://github.com/sHorst/socketcan-linux-5.0/blob/master/usb-to-can_socketcan/ixx_usb_core.c#L403

But even when commenting out the line completely (which would result in a Memory leak for now) it does still not work. Since the err of usb_submit_urb(urb, GFP_KERNEL); is ENOENT which indicates "specified interface or endpoint does not exist or is not enabled". I did not dig any deeper, do you have any idears, why it breaks here?

I am using a Kali VM (current as of now) with an USB2CAN interface.

Stefan

[skaretk]

Hello @sHorst .
I were also looking into getting this to work with kernel above 5.

Thanks to your code I were able to bring up the can interface on a laptop running native Ubuntu 20.04.

I remember trying to run ubuntu 16.04 on a VM (Virtualbox) with a Ixxat USB2CAN interface, but when attempting to bring up the can interface it resulted in the VM to crash. I never found a solution to this using a VM. Maybe this is related to running this inside a virtual enviroment?

[sHorst]

ok the VM seems to be the problem.

So i did a PR #9

[samr-eroad]

I am not entirely certain whether we can narrow this down to a VM issue.
5.11.0-46-generic on a VM (20.04) works fine without any segfaults.