From: Jiri Kosina <jikos@kernel.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>, Shuah Khan <shuah@kernel.org>,
Dave Marchevsky <davemarchevsky@fb.com>,
Joe Stringer <joe@cilium.io>,
Tero Kristo <tero.kristo@linux.intel.com>,
lkml <linux-kernel@vger.kernel.org>,
"open list:HID CORE LAYER" <linux-input@vger.kernel.org>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kselftest@vger.kernel.org,
Peter Hutterer <peter.hutterer@redhat.com>
Subject: Re: [PATCH bpf-next v1 0/6] Introduce eBPF support for HID devices
Date: Mon, 28 Feb 2022 17:33:49 +0100 (CET) [thread overview]
Message-ID: <nycvar.YFH.7.76.2202281733000.11721@cbobk.fhfr.pm> (raw)
In-Reply-To: <YhkEqpF6QSYeoMQn@kroah.com>
On Fri, 25 Feb 2022, Greg KH wrote:
> > I mean that if you need a bpf program to be loaded from userspace at
> > boot to make your keyboard functional, then you need to have the root
> > partition mounted (or put the program in the initrd) so udev can load
> > it. Now if your keyboard is supposed to give the password used to
> > decrypt your root partition but you need a bpf program on that said
> > partition to make it functional, you are screwed :)
>
> True, but that's why the HID boot protocol was designed for keyboards
> and mice, so that they "always" work. Yeah, I know many devices ignore
> it, oh well...
That's a very mild statement :)
*Most* of the recent modern HW doesn't support it as far as I can say.
Thanks,
--
Jiri Kosina
SUSE Labs
next prev parent reply other threads:[~2022-02-28 16:34 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-24 11:08 [PATCH bpf-next v1 0/6] Introduce eBPF support for HID devices Benjamin Tissoires
2022-02-24 11:08 ` [PATCH bpf-next v1 1/6] HID: initial BPF implementation Benjamin Tissoires
2022-02-24 11:34 ` Greg KH
2022-02-24 13:52 ` Benjamin Tissoires
2022-02-28 17:30 ` Benjamin Tissoires
2022-02-26 7:19 ` Song Liu
2022-02-28 17:38 ` Benjamin Tissoires
2022-02-24 11:08 ` [PATCH bpf-next v1 2/6] HID: bpf: allow to change the report descriptor from an eBPF program Benjamin Tissoires
2022-02-26 7:25 ` Song Liu
2022-02-28 17:41 ` Benjamin Tissoires
2022-02-24 11:08 ` [PATCH bpf-next v1 3/6] HID: bpf: add hid_{get|set}_data helpers Benjamin Tissoires
2022-02-24 11:08 ` [PATCH bpf-next v1 4/6] HID: bpf: add new BPF type to trigger commands from userspace Benjamin Tissoires
2022-02-24 11:08 ` [PATCH bpf-next v1 5/6] HID: bpf: tests: rely on uhid event to know if a test device is ready Benjamin Tissoires
2022-02-24 11:08 ` [PATCH bpf-next v1 6/6] HID: bpf: add bpf_hid_raw_request helper function Benjamin Tissoires
2022-02-24 11:31 ` [PATCH bpf-next v1 0/6] Introduce eBPF support for HID devices Greg KH
2022-02-24 13:49 ` Benjamin Tissoires
2022-02-24 17:20 ` Yonghong Song
2022-02-25 16:06 ` Benjamin Tissoires
2022-02-25 16:19 ` Greg KH
2022-02-25 16:30 ` Yonghong Song
2022-02-25 13:38 ` Greg KH
2022-02-25 16:00 ` Benjamin Tissoires
2022-02-25 16:23 ` Greg KH
2022-02-25 16:32 ` Greg KH
2022-02-26 7:36 ` Song Liu
2022-02-26 9:19 ` Benjamin Tissoires
2022-02-28 16:33 ` Jiri Kosina [this message]
2022-02-24 17:41 ` Bastien Nocera
2022-02-24 18:20 ` Greg KH
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