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Re: XFS information leak during crash

To: Nathan Scott <nathans@xxxxxxx>
Subject: Re: XFS information leak during crash
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 03 Nov 2005 12:45:49 +0000
Cc: Jan Kasprzak <kas@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxx
In-reply-to: <20051103111115.C6081538@wobbly.melbourne.sgi.com>
References: <20051102212722.GC6759@fi.muni.cz> <20051103101107.O6239737@wobbly.melbourne.sgi.com> <20051102233629.GD6759@fi.muni.cz> <20051103104956.B6081538@wobbly.melbourne.sgi.com> <20051103000317.GE6759@fi.muni.cz> <20051103111115.C6081538@wobbly.melbourne.sgi.com>
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On Iau, 2005-11-03 at 11:11 +1100, Nathan Scott wrote:
> On Thu, Nov 03, 2005 at 01:03:17AM +0100, Jan Kasprzak wrote:
> > : it would only ever be uninitialised, previously-free space.
> > 
> >     Yes, but an old data from previously deleted files
> > (sendmail's temporary files, vim save files, etc) may contain
> > a sensitive information.
> Indeed.  But this is a generic issue affecting most filesystems;
> its not specific to XFS as your original mail claimed.

Very true. You can use ext3 in data journalling mode if this is a
concern but that guarantee has a performance cost

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