GNU bug report logs - #17108
[PATCH 1/4] libparted: Check AlternateLBA against LBA-1

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Message #26 received at 17108 <at> debbugs.gnu.org (full text, mbox):

From: Phillip Susi <psusi <at> ubuntu.com>
To: "Brian C. Lane" <bcl <at> redhat.com>
Cc: 17108 <at> debbugs.gnu.org
Subject: Re: bug#17108: [PATCH 1/4] libparted: Check AlternateLBA against LBA-1
Date: Thu, 27 Mar 2014 20:04:28 -0400

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On 03/27/2014 06:48 PM, Brian C. Lane wrote:
> Tried that (with my modified code) and it works fine. The header
> munge is changing the PE count to 9 from 128 and re-calculating the
> checksums.
> 
> I went through the code -- when we rewrite the headers all the
> sizes and references are updated, in the pmbr and in both headers.

Ok, now I'm not seeing that odd 2g problem.  Maybe before I was
running it on a 32 bit machine?  Anyhow, the problem is that
gpt-header-munge shrinks the table but doesn't update LastUsableLba to
agree.  It should do that, but I suppose we could put the two tests
together.  If the backup is *either* at the last sector, *or* the
right location relative to LastUsableLba, then it's in the right place.

Following up with a patch to do this.

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