From: the grugq <grugq@hcunix.net>
To: Bill Davidsen <davidsen@tmr.com>
Cc: Valdis.Kletnieks@vt.edu, "Theodore Ts'o" <tytso@mit.edu>,
Pavel Machek <pavel@ucw.cz>,
linux-kernel@vger.kernel.org
Subject: Re: PATCH - ext2fs privacy (i.e. secure deletion) patch
Date: Thu, 05 Feb 2004 01:48:43 +0000 [thread overview]
Message-ID: <4021A0FB.7060505@hcunix.net> (raw)
In-Reply-To: <402184AA.2010302@tmr.com>
>
> But what happens when the 'setgid' bit is put on a directory? At least
> in 2.4 existing files do NOT get the group set, only files newly
> created. So unless someone feels that's a bug which needs immediate
> fixing, I can point to it as a model by which the feature could be
> practically implemented.
Implementing the privacy patch based on the suggestions put forward
(chattr +s && mount options), i've hit something of a snag.
If a directory has "chattr +s" then whenever a directory entry is
deleted, should the dirent contents be overwritten, or should only freed
blocks be overwritten? It makes sense to me that the directory entry
should be overwritten because it is inaccessible meta-data and exposes
information about the file system. Since the user obviously wants the
directory to be securely deleted, that could be construed as implying
they want sensitive directory content securely deleted as well.
--gq
next prev parent reply other threads:[~2004-02-05 1:51 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-28 16:30 PATCH - ext2fs privacy (i.e. secure deletion) patch the grugq
2004-02-03 22:20 ` Pavel Machek
2004-02-04 0:33 ` the grugq
2004-02-04 0:43 ` Pavel Machek
2004-02-04 0:48 ` the grugq
2004-02-04 0:55 ` Pavel Machek
2004-02-04 0:58 ` the grugq
2004-02-04 1:10 ` Mike Fedyk
2004-02-04 6:29 ` Theodore Ts'o
2004-02-04 13:08 ` the grugq
2004-02-04 17:05 ` Bill Davidsen
2004-02-04 17:14 ` Valdis.Kletnieks
2004-02-04 23:47 ` Bill Davidsen
2004-02-04 23:51 ` the grugq
2004-02-05 1:48 ` the grugq [this message]
2004-02-05 4:38 ` Valdis.Kletnieks
2004-02-07 3:30 ` Bill Davidsen
2004-02-05 3:35 ` Theodore Ts'o
2004-02-06 0:00 ` the grugq
2004-02-12 22:59 ` Robert White
2004-02-13 3:41 ` Jamie Lokier
2004-02-13 21:30 ` Robert White
2004-02-18 3:48 ` Bill Davidsen
2004-02-18 9:48 ` Jamie Lokier
2004-02-17 12:00 ` Pavel Machek
2004-02-04 3:20 ` Valdis.Kletnieks
2004-02-07 0:20 ` Jamie Lokier
2004-02-07 1:15 ` Hans Reiser
2004-02-07 1:29 ` the grugq
2004-02-07 5:40 ` Hans Reiser
2004-02-07 9:55 ` the grugq
2004-02-07 10:47 ` Jamie Lokier
2004-02-07 11:02 ` the grugq
2004-02-07 11:09 ` Jamie Lokier
2004-02-07 11:46 ` the grugq
2004-02-07 12:01 ` Jamie Lokier
2004-02-07 16:52 ` Hans Reiser
2004-02-07 17:22 ` Pavel Machek
2004-02-08 0:04 ` Jamie Lokier
2004-02-07 16:50 ` Hans Reiser
2004-02-07 16:44 ` Hans Reiser
2004-02-09 12:07 ` Edward Shishkin
2004-02-10 7:18 ` Hans Reiser
2004-02-07 2:17 ` Jamie Lokier
-- strict thread matches above, loose matches on Subject: below --
2004-02-07 9:55 Albert Cahalan
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