linux-kernel - Re: [PATCH] efivarfs: fix abnormal GUID in variable name by using strcpy to replace null with dash

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Date:	Wed, 06 Mar 2013 14:30:33 +0100
From:	Frederic Crozat <fcrozat@...e.com>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	joeyli <jlee@...e.com>, linux-efi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Michael Schroeder <mls@...e.com>,
	Josh Boyer <jwboyer@...hat.com>,
	Peter Jones <pjones@...hat.com>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: [PATCH] efivarfs: fix abnormal GUID in variable name by using
 strcpy to replace null with dash

Le mercredi 06 mars 2013 à 12:36 +0000, Matt Fleming a écrit :
> On Wed, 2013-03-06 at 12:58 +0100, Frederic Crozat wrote:
> > Le mercredi 06 mars 2013 à 11:19 +0000, Matt Fleming a écrit :
> > 
> > > Also, which machine did you see this behaviour on?
> > 
> > HP z220 desktop, System BIOS K51 v 1.54
> > 
> > this issue is only the "Secure Boot" related variables, which make me
> > think HP incorrectly created them in their latest firmware (where they
> > added Windows 8 support).
> 
> Are you saying that the behaviour regarding VariableNameSize changes
> depending on which variable is returned?
>
> Mercy.....
 
Well, I only get the error message for some variables (8), not all of
them.

It was quite visible on unpatched kernel, with ls
-d /sys/firmware/efi/vars. 

ls -d /sys/firmware/efi/vars/*8be4d* | grep -v -- -8be returns
/sys/firmware/efi/vars/dbxDefault-pport8be4df61-93ca-11d2-aa0d-00e098032b8c
/sys/firmware/efi/vars/KEKDefault-pport8be4df61-93ca-11d2-aa0d-00e098032b8c
/sys/firmware/efi/vars/SecureBoot-pport8be4df61-93ca-11d2-aa0d-00e098032b8c
/sys/firmware/efi/vars/SetupMode-Information8be4df61-93ca-11d2-aa0d-00e098032b8c
/sys/firmware/efi/vars/SignatureSupport-pport8be4df61-93ca-11d2-aa0d-00e098032b8c
/sys/firmware/efi/vars/VendorKeys-pport8be4df61-93ca-11d2-aa0d-00e098032b8c

All other variable names were fine.
-- 
Frederic Crozat <fcrozat@...e.com>
SUSE

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