linux-kernel - Re: [PATCH] firmware: dmi: Stop decoding on broken entry

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Message-ID: <143afb82-dcc4-4fd3-a851-a03b01532694@gmx.de>
Date: Thu, 18 Apr 2024 00:08:22 +0200
From: Michael Schierl <schierlm@....de>
To: Jean Delvare <jdelvare@...e.de>
Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
 Michael Kelley <mhklinux@...look.com>
Subject: Re: [PATCH] firmware: dmi: Stop decoding on broken entry

Hello,


Am 17.04.2024 um 17:33 schrieb Jean Delvare:
> If a DMI table entry is shorter than 4 bytes, it is invalid. Due to
> how DMI table parsing works, it is impossible to safely recover from
> such an error, so we have to stop decoding the table.
>
> Signed-off-by: Jean Delvare <jdelvare@...e.de>
> Link: https://lore.kernel.org/linux-kernel/Zh2K3-HLXOesT_vZ@liuwe-devbox-debian-v2/T/
> ---
> Michael, can you please test this patch and confirm that it prevents
> the early oops?


Tested-By: Michael Schierl <schierlm@....de>


Applied on top of 6.8.4, it prevents the early oops I previously
observed when booting with 2 vCPUs.


Regards,


Michael