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From: Christian Gelinek <christian.gelinek@mailbox.org>
To: Tobias Geerinckx-Rice <me@tobias.gr>
Cc: help-guix@gnu.org
Subject: Re: Intel i7-1165G7 vulnerable to Spectre v2
Date: Fri, 3 Feb 2023 10:13:11 +0000	[thread overview]
Message-ID: <e89f4bb3-8035-efc9-4c98-72beec6c7bc8@mailbox.org> (raw)
In-Reply-To: <87fsbpnzil.fsf@nckx>

On 1/2/23 15:58, Tobias Geerinckx-Rice wrote:
> Christian Gelinek 写道:
>> Spectre v2: Vulnerable: eIBRS with unprivileged eBPF
> […]
>> Spectre v2: Mitigation; Enhanced IBRS, IBPB conditional, RSB filling, 
>> PBRSB-eIBRS SW sequence
> 
> Does
> 
>   $ echo 1 | sudo tee /proc/sys/kernel/unprivileged_bpf_disabled
> 
> change this?

It does, thank you! This is the updated output line of `lscpu`:

Spectre v2: Mitigation; Enhanced IBRS, IBPB conditional, RSB filling, 
PBRSB-eIBRS SW sequence

which matches the output I saw when I was running Debian 11.

How can I make this change permanent, ideally surviving both reboots as 
well as `guix system reconfigure` invocations?

Or do we think this will be soon compiled into the kernel, if I 
understood Remco's message [0] and your response [1] to that correctly, 
and therefore coming "for free" (for me, anyway) by `reconfigure`ing?

Kinde regards,
Christian

[0]: https://lists.gnu.org/archive/html/help-guix/2023-02/msg00008.html
[1]: https://lists.gnu.org/archive/html/help-guix/2023-02/msg00009.html


      parent reply	other threads:[~2023-02-03 10:14 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-01 10:21 Intel i7-1165G7 vulnerable to Spectre v2 Christian Gelinek
2023-02-01 14:20 ` Felix Lechner via
2023-02-03  9:59   ` Christian Gelinek
2023-02-01 15:58 ` Tobias Geerinckx-Rice
2023-02-01 18:29   ` Ekaitz Zarraga
2023-02-01 19:43     ` Disabling unprivileged BPF by default in our kernels Tobias Geerinckx-Rice
2023-02-02 11:40       ` Leo Famulari
2023-02-02 17:13       ` Remco van 't Veer
2023-02-02 17:19         ` Tobias Geerinckx-Rice
2023-02-03 10:13   ` Christian Gelinek [this message]

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