From: Aaron Lehmann <aaronl@vitelus.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Jamie Lokier <lk@tantalophile.demon.co.uk>, linux-kernel@vger.kernel.org
Subject: Re: Security question: "Text file busy" overwriting executables but not shared libraries?
Date: Sat, 13 Oct 2001 15:50:05 -0700 [thread overview]
Message-ID: <20011013155005.E9856@vitelus.com> (raw)
In-Reply-To: <20011013205445.A24854@kushida.jlokier.co.uk> <Pine.LNX.4.33.0110131219520.8900-100000@penguin.transmeta.com> <20011013214603.A1144@kushida.jlokier.co.uk> <20011013144337.D9856@vitelus.com> <m1r8s7qior.fsf@frodo.biederman.org>
In-Reply-To: <m1r8s7qior.fsf@frodo.biederman.org>
On Sat, Oct 13, 2001 at 04:27:48PM -0600, Eric W. Biederman wrote:
> > But it does have the advantage of allowing the sharing of memory, does
> > it not?
>
> Only if you are going to write to the data.
Why? If gcc and another application read the source file with an
mmap() with the right parameters (read-only), it would only be shared
between them, as I understand it. If they both read() the file into
private buffers those can not be shared.
next prev parent reply other threads:[~2001-10-13 22:50 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-03 12:49 Security question: "Text file busy" overwriting executables but not shared libraries? Jesse Pollard
2001-10-03 18:06 ` Eric W. Biederman
2001-10-03 23:20 ` Rob Landley
2001-10-04 3:38 ` Eric W. Biederman
2001-10-04 4:19 ` Alexander Viro
2001-10-04 6:15 ` Eric W. Biederman
2001-10-04 8:21 ` CaT
2001-10-04 8:35 ` john slee
2001-10-04 8:45 ` CaT
2001-10-04 13:11 ` Eric W. Biederman
2001-10-04 14:24 ` Kernel size Richard B. Johnson
2001-10-13 20:35 ` Aaron Lehmann
2001-10-04 8:30 ` Security question: "Text file busy" overwriting executables but not shared libraries? Ville Herva
2001-10-04 9:46 ` Erik Andersen
2001-10-04 8:53 ` Andreas Schwab
2001-10-04 13:23 ` Eric W. Biederman
2001-10-04 19:50 ` Security question: "Text file busy" overwriting executables but no Kai Henningsen
2001-10-04 9:12 ` Bloatware (was Re: Security question: "Text file busy"...) VDA
2001-10-04 5:38 ` Security question: "Text file busy" overwriting executables but not shared libraries? Linus Torvalds
2001-10-04 5:44 ` Alexander Viro
2001-10-04 5:49 ` Linus Torvalds
2001-10-04 15:01 ` Eric W. Biederman
2001-10-04 15:49 ` Linus Torvalds
2001-10-04 16:11 ` Alexander Viro
2001-10-04 17:25 ` Eric W. Biederman
2001-10-13 14:53 ` Jamie Lokier
2001-10-13 17:13 ` Linus Torvalds
2001-10-13 18:18 ` Rik van Riel
2001-10-13 18:40 ` Pablo Alcaraz
2001-10-13 19:05 ` Jamie Lokier
2001-10-13 18:54 ` Jamie Lokier
2001-10-13 19:23 ` Linus Torvalds
2001-10-13 19:46 ` Jamie Lokier
2001-10-13 21:43 ` Aaron Lehmann
2001-10-13 22:27 ` Eric W. Biederman
2001-10-13 22:50 ` Aaron Lehmann [this message]
2001-10-15 11:24 ` Jamie Lokier
2001-10-13 22:19 ` Linus Torvalds
2001-10-14 6:49 ` Eric W. Biederman
2001-10-14 15:40 ` Linus Torvalds
2001-10-14 18:49 ` Eric W. Biederman
2001-10-14 8:17 ` Xavier Bestel
2001-10-15 11:43 ` Jamie Lokier
2001-10-13 22:27 ` Linus Torvalds
2001-10-13 22:41 ` Richard Gooch
2001-10-15 11:35 ` Jamie Lokier
2001-10-15 11:51 ` Alexander Viro
2001-10-15 12:29 ` Jamie Lokier
2001-10-14 12:57 ` Security question: "Text file busy" overwriting executables but no Kai Henningsen
2001-10-14 21:43 ` Security question: "Text file busy" overwriting executables but not shared libraries? Mark H. Wood
2001-10-04 19:28 ` Security question: "Text file busy" overwriting executables but no Kai Henningsen
2001-10-04 16:02 ` Security question: "Text file busy" overwriting executables but not shared libraries? Richard Gooch
2001-10-04 16:20 ` Andreas Schwab
2001-10-04 17:19 ` Richard Gooch
2001-10-04 20:39 ` Security question: "Text file busy" overwriting executables but Alan Cox
2001-10-05 16:30 ` Eric W. Biederman
2001-10-05 16:58 ` Linus Torvalds
2001-10-05 17:35 ` Horst von Brand
2001-10-05 17:44 ` Linus Torvalds
2001-10-05 18:51 ` Oliver Xymoron
2001-10-06 19:05 ` Eric W. Biederman
2001-10-14 8:02 ` [RFC] "Text file busy" when overwriting libraries Eric W. Biederman
2001-10-14 12:08 ` Alan Cox
2001-10-14 20:48 ` Eric W. Biederman
2001-10-15 1:44 ` Alan Cox
2001-10-15 2:06 ` Linus Torvalds
2001-10-15 10:11 ` Eric W. Biederman
2001-10-15 11:54 ` Alan Cox
2001-10-15 11:57 ` Alexander Viro
2001-10-15 12:08 ` Alan Cox
2001-10-15 12:11 ` Alexander Viro
2001-10-04 5:53 ` Security question: "Text file busy" overwriting executables but not shared libraries? Richard Gooch
2001-10-04 6:50 ` George Greer
2001-10-04 12:54 ` John Levon
-- strict thread matches above, loose matches on Subject: below --
2001-10-03 2:55 Rob Landley
2001-10-03 7:07 ` Alexander Viro
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