From: George Greer <greerga@m-l.org>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: Security question: "Text file busy" overwriting executables but not shared libraries?
Date: Thu, 4 Oct 2001 02:50:24 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.33.0110040247310.3686-100000@bacon.van.m-l.org> (raw)
In-Reply-To: <9pgsk4$7ep$1@penguin.transmeta.com>
On Thu, 4 Oct 2001, Linus Torvalds wrote:
>Which is why the kernel only allows it when the binary loader itself
>sets the flag, because security-conscious application writers are
>already aware of the "oh, a running binary may not be writable" issues.
One of the methods I tried to use to stop a fork()-bomb was to zero the
executable in question to force it to crash. No such luck, reboot it was.
Not that I can think of any other useful application of said behavior.
--
George Greer, greerga@m-l.org
http://www.m-l.org/~greerga/
next prev parent reply other threads:[~2001-10-04 6:50 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
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 [this message]
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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