linux-kernel - Re: Corrupted EFI region

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Date:	Wed, 31 Jul 2013 21:58:58 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Matt Fleming <matt@...sole-pimps.org>, linux-efi@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: Corrupted EFI region

On Wed, Jul 31, 2013 at 10:54:31PM +0200, Borislav Petkov wrote:

>  efi: mem08: type=7, attr=0xf, range=[0x0000000040000000-0x000000007c000000) (960MB)
>  efi: mem09: type=4, attr=0xf, range=[0x000000007c000000-0x000000007c020000) (0MB)
>  efi: mem10: type=7, attr=0xf, range=[0x000000007c020000-0x000000007e0ad000) (32MB)
> -efi: mem11: type=4, attr=0xf, range=[0x000000007e0ad000-0x000000007e0cc000) (0MB)
> +efi: mem11: type=4, attr=0xf, range=[0x000000007e0ad000-0x000000007e0ad000) (0MB)
>  efi: mem12: type=7, attr=0xf, range=[0x000000007e0cc000-0x000000007e0cd000) (0MB)
>  efi: mem13: type=4, attr=0xf, range=[0x000000007e0cd000-0x000000007e55d000) (4MB)
>  efi: mem14: type=3, attr=0xf, range=[0x000000007e55d000-0x000000007e59c000) (0MB)

Are we making any EFI calls in between? I certainly wouldn't expect the 
memory map to change after ExitBootServices, but up until that point the 
firmware's free to mess with it.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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