From: "Horst H. von Brand" <vonbrand@inf.utfsm.cl>
To: Stas Sergeev <stsp@aknet.ru>
Cc: Arjan van de Ven <arjan@infradead.org>,
Ulrich Drepper <drepper@redhat.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Jakub Jelinek <jakub@redhat.com>,
Linux kernel <linux-kernel@vger.kernel.org>,
Hugh Dickins <hugh@veritas.com>,
Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [patch] honour MNT_NOEXEC for access()
Date: Sun, 08 Oct 2006 22:09:18 -0400 [thread overview]
Message-ID: <200610090209.k9929IdP009924@laptop13.inf.utfsm.cl> (raw)
In-Reply-To: Message from Stas Sergeev <stsp@aknet.ru> of "Sun, 08 Oct 2006 13:11:12 +0400." <4528C0B0.4070002@aknet.ru>
Stas Sergeev <stsp@aknet.ru> wrote:
> Arjan van de Ven wrote:
> >> but ld.so seems to be
> >> the special case - it is a kernel helper after all,
> > in what way is ld.so special in ANY way?
> It is a kernel helper.
Right. But what prevents anybody to have a hacked, non-testing, ld.so lying
around?
> Kernel does all the security
> checks before invoking it. However, when invoked
> directly, it have to do these checks itself. So it is
> special in a way that it have to do the security checks
> which otherwise only the kernel should do.
It just can't do them (reliably at least) in general. Call it a Unix/POSIX
design failure...
--
Dr. Horst H. von Brand User #22616 counter.li.org
Departamento de Informatica Fono: +56 32 2654431
Universidad Tecnica Federico Santa Maria +56 32 2654239
Casilla 110-V, Valparaiso, Chile Fax: +56 32 2797513
next prev parent reply other threads:[~2006-10-09 3:33 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-23 10:30 [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps Stas Sergeev
2006-09-23 15:16 ` Hugh Dickins
2006-09-23 15:36 ` Ulrich Drepper
2006-09-23 15:47 ` Stas Sergeev
2006-09-25 1:12 ` Valdis.Kletnieks
2006-09-25 4:35 ` Stas Sergeev
2006-09-23 15:42 ` Stas Sergeev
2006-09-23 16:04 ` Hugh Dickins
2006-09-23 16:38 ` Stas Sergeev
2006-09-23 18:58 ` Alan Cox
2006-09-24 6:55 ` Stas Sergeev
2006-09-24 9:17 ` Hugh Dickins
2006-09-24 10:00 ` Stas Sergeev
2006-09-24 13:53 ` Alan Cox
2006-09-24 14:54 ` Stas Sergeev
2006-09-24 15:48 ` Ulrich Drepper
2006-09-24 16:31 ` Stas Sergeev
2006-09-24 16:49 ` Ulrich Drepper
2006-09-24 17:04 ` Stas Sergeev
2006-09-24 18:09 ` Stas Sergeev
2006-09-24 19:14 ` David Wagner
2006-09-24 19:37 ` Kyle Moffett
2006-09-24 22:49 ` David Wagner
2006-09-25 10:53 ` Pavel Machek
2006-09-25 21:36 ` David Wagner
2006-09-27 11:51 ` Pavel Machek
2006-09-24 20:06 ` Denis Vlasenko
2006-09-24 20:22 ` Stas Sergeev
2006-09-24 23:04 ` David Wagner
2006-09-26 19:46 ` Stas Sergeev
2006-09-27 22:33 ` Arjan van de Ven
2006-09-27 23:10 ` David Wagner
2006-09-27 23:38 ` Jesper Juhl
2006-09-29 1:14 ` David Wagner
2006-09-28 4:52 ` Stas Sergeev
2006-09-30 9:42 ` Stas Sergeev
2006-10-03 15:01 ` Arjan van de Ven
2006-10-03 17:15 ` Stas Sergeev
2006-10-03 17:23 ` Ulrich Drepper
2006-10-03 18:06 ` Stas Sergeev
2006-10-03 19:19 ` Ulrich Drepper
2006-10-03 19:40 ` Stas Sergeev
2006-10-03 19:54 ` Arjan van de Ven
2006-10-04 19:36 ` Stas Sergeev
2006-10-04 21:31 ` David Wagner
2006-10-04 3:11 ` David Wagner
2006-10-04 3:51 ` Ulrich Drepper
2006-10-04 4:21 ` David Wagner
2006-10-04 6:03 ` Kyle Moffett
2006-10-04 17:30 ` Ulrich Drepper
2006-10-03 18:23 ` Arjan van de Ven
2006-10-03 18:40 ` Stas Sergeev
2006-10-03 18:42 ` Arjan van de Ven
2006-10-03 19:07 ` Stas Sergeev
2006-10-03 21:00 ` Jakub Jelinek
2006-10-04 19:06 ` Stas Sergeev
2006-10-06 18:09 ` [patch] honour MNT_NOEXEC for access() Stas Sergeev
2006-10-06 21:34 ` Alan Cox
2006-10-06 21:17 ` Ulrich Drepper
2006-10-07 11:19 ` Stas Sergeev
2006-10-07 15:00 ` David Wagner
2006-10-07 16:31 ` Ulrich Drepper
2006-10-07 19:14 ` Stas Sergeev
2006-10-07 19:36 ` David Wagner
2006-10-08 8:32 ` Arjan van de Ven
2006-10-08 9:11 ` Stas Sergeev
2006-10-08 10:55 ` Arjan van de Ven
2006-10-08 13:46 ` Stas Sergeev
2006-10-09 2:09 ` Horst H. von Brand [this message]
2006-10-09 4:40 ` Stas Sergeev
2006-10-07 13:18 ` Stas Sergeev
2006-10-08 0:30 ` Jeremy Fitzhardinge
2006-10-08 9:10 ` Stas Sergeev
2006-10-08 9:56 ` Jeremy Fitzhardinge
2006-10-08 10:36 ` Stas Sergeev
2006-10-08 10:39 ` Jesper Juhl
2006-10-08 13:22 ` Stas Sergeev
2006-10-06 22:26 ` Jesper Juhl
2006-10-04 19:30 ` [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps Stas Sergeev
2006-10-04 3:20 ` David Wagner
2006-10-04 3:17 ` David Wagner
2006-10-04 13:41 ` Jeff Dike
2006-10-04 18:02 ` Jesper Juhl
2006-10-04 19:48 ` Stas Sergeev
2006-09-27 19:16 ` [patch] remove MNT_NOEXEC check for PROT_EXEC MAP_PRIVATE mmaps Stas Sergeev
2006-09-27 20:05 ` Hugh Dickins
2006-09-28 4:33 ` Stas Sergeev
2006-09-28 16:42 ` Hugh Dickins
2006-09-29 1:41 ` David Wagner
2006-09-29 20:50 ` Arjan van de Ven
2006-09-29 16:54 ` Stas Sergeev
2006-09-24 19:59 ` [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps Alan Cox
2006-09-24 20:07 ` Stas Sergeev
2006-09-24 0:53 ` Arjan van de Ven
2006-09-25 17:17 ` Stas Sergeev
2006-09-25 17:43 ` Stas Sergeev
2006-09-25 20:12 ` David Wagner
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