Re: [PATCH v2] Bluetooth: L2CAP: reject BR/EDR signaling packets over MTUsig

[Michael Bommarito]

On Wed, May 20, 2026 at 10:00 AM Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:
> Weird, does the AI come up with this? The id is actually _not_
> important because the error code will essentially indicate that the
> entire packet was rejected. Therefore, it doesn't matter if the id is
> for a request or a response, it still needs rejection if it exceeds
> the MTU, so this seems overengineered.

Yes, and I debated this with Claude, but it convinced me that the
lifted helpers were more idiomatic for the actual spec and bt system:
"The identifier shall match the first request command in the L2CAP
packet. If only responses are recognized, the packet shall be silently
discarded."

So if we ever lifted or refactored the code, it would be abundantly
clear/safe to reuse elsewhere.

There is also much shorter version that just peeks skb->data[1] and
exits early if not ident=0 if that's what you're going for.

Just let me know what version you prefer.

Thanks,
Mike