Re: [tboot-devel] [PATCH 1/1] Disable CET when calling tboot shutdown procedure.
From: Bagas Sanjaya
Date: Mon Nov 24 2025 - 19:35:08 EST
On Thu, Nov 13, 2025 at 09:37:14AM -0500, Tony Camuso wrote:
> The tboot->shutdown_entry is effectively bios code and CET needs to be
> disabled before calling it.
>
> It resolves TBOOT shutdown failure bug, reported on the SLES (SUSE Linux
> Enterprise Server) 16.0 OS. OS power off, called by the "init 0" command,
> was failing, due to activated Intel Control-Flow Enforcement Technology
> (CET).
> Disabling CET has allowed to execute OS and TBOOT shutdown properly.
Are ``systemctl poweroff`` and ``shutdown -P`` are also affected?
Confused...
--
An old man doll... just what I always wanted! - Clara
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