netdev - Fwd: HID-BPF fails to initialise for Linux 6.6.8, claiming -EINVAL

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Message-ID: <CAK2bqVLX9PTQoeWw7rOP4Z3z84bqT_k0mb-y8jORWMNx-v3LXQ@mail.gmail.com>
Date: Wed, 27 Dec 2023 13:23:30 +0000
From: Chris Rankin <rankincj@...il.com>
To: netdev@...r.kernel.org
Subject: Fwd: HID-BPF fails to initialise for Linux 6.6.8, claiming -EINVAL

Hi,
I've stumbled across a BPF configuration issue and was wondering if
anyone could help please?
Thanks,
Chris

---------- Forwarded message ---------
From: Chris Rankin <rankincj@...il.com>
Date: Tue, 26 Dec 2023 at 11:06
Subject: HID-BPF fails to initialise for Linux 6.6.8, claiming -EINVAL
To: <bpf@...r.kernel.org>

Hi,

I have tried to add BPF LSM support to my 6.6.8 kernel, but HID-BPF
fails with this message:

[    3.210054] hid_bpf: error while preloading HID BPF dispatcher: -22

At this point, I can only assume that the Kconfig rules are somehow
incomplete and that there is a missing dependency somewhere.

I have raised this issue as:
https://bugzilla.kernel.org/show_bug.cgi?id=218320, where I have
attached my kernel config. Can anyone see what I might be missing
please?

Thanks,
Chris