From: Stas Sergeev <stsp@aknet.ru>
To: Ulrich Drepper <drepper@redhat.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Hugh Dickins <hugh@veritas.com>, Andrew Morton <akpm@osdl.org>,
Linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps
Date: Sun, 24 Sep 2006 22:09:20 +0400 [thread overview]
Message-ID: <4516C9D0.3080606@aknet.ru> (raw)
In-Reply-To: <4516B721.5070801@redhat.com>
Ulrich Drepper wrote:
> The consensus has been to add the same checks to mprotect. They were
> not left out intentionally.
But how about the anonymous mmap with PROT_EXEC set?
This is exactly what the malicious loader will do, it
won't do the shared (or private) file-backed mmap.
So your technique doesn't restrict the malicious
loaders, including the potential script loader you
were referring to. It doesn't even make their life
any harder. Only the properly-written programs suffer.
Or, in case of ceasing to use noexec - the security.
next prev parent reply other threads:[~2006-09-24 18:07 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 [this message]
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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4516C9D0.3080606@aknet.ru \
--to=stsp@aknet.ru \
--cc=akpm@osdl.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=drepper@redhat.com \
--cc=hugh@veritas.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.