All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vasiliy Kulikov <segoon@openwall.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, James Morris <jmorris@namei.org>,
	x86@kernel.org, kernel-hardening@lists.openwall.com,
	linux-kernel@vger.kernel.org,
	linux-security-module@vger.kernel.org
Subject: Re: [kernel-hardening] Re: [RFC] x86: restrict pid namespaces to 32 or 64 bit syscalls
Date: Sat, 13 Aug 2011 20:32:52 +0400	[thread overview]
Message-ID: <20110813163252.GA18458@albatros> (raw)
In-Reply-To: <36fcaf94-2e99-47cb-a835-aefb79856429@email.android.com>

On Sat, Aug 13, 2011 at 10:41 -0500, H. Peter Anvin wrote:
> IA64 is totally different.

I didn't say all IA-32 compatibility layer of x86 is a crap, surely no.
But there is some code, which is poorly tested exactly because it is
compatibility code.  One relatively recent example:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3e645d6b485446c54c6745c5e2cf5c528fe4deec

>  I'm extremely sceptical to this patch;
> it feels like putting code in a super-hot path to paper over a problem that has to be fixed anyway.

I'll move the check to the tracesys branch, which is not a hot path, in
the next RFC version, so this should not be a problem.

Thanks,

-- 
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments

  reply	other threads:[~2011-08-13 16:33 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-12 15:03 [RFC] x86: restrict pid namespaces to 32 or 64 bit syscalls Vasiliy Kulikov
2011-08-12 15:03 ` [kernel-hardening] " Vasiliy Kulikov
2011-08-12 20:08 ` H. Peter Anvin
2011-08-12 20:08   ` [kernel-hardening] " H. Peter Anvin
2011-08-13  6:22   ` Vasiliy Kulikov
2011-08-13  6:22     ` [kernel-hardening] " Vasiliy Kulikov
2011-08-13 15:41     ` H. Peter Anvin
2011-08-13 15:41       ` [kernel-hardening] " H. Peter Anvin
2011-08-13 16:32       ` Vasiliy Kulikov [this message]
2011-08-14  9:09         ` Solar Designer
2011-08-14  9:09           ` [kernel-hardening] " Solar Designer
2011-08-18 14:40         ` [RFC v2] " Vasiliy Kulikov
2011-08-18 14:40           ` [kernel-hardening] " Vasiliy Kulikov
2011-08-14  2:38       ` [RFC] " Andi Kleen
2011-08-14  2:38         ` [kernel-hardening] " Andi Kleen
2011-08-14  5:08         ` H. Peter Anvin
2011-08-14  5:08           ` [kernel-hardening] " H. Peter Anvin
2011-08-14  9:20           ` Solar Designer
2011-08-14  9:20             ` [kernel-hardening] " Solar Designer
2011-08-14 14:48             ` H. Peter Anvin
2011-08-14 14:48               ` [kernel-hardening] " H. Peter Anvin
2011-08-14 15:27               ` Andi Kleen
2011-08-14 15:27                 ` [kernel-hardening] " Andi Kleen
2011-08-14 15:36                 ` H. Peter Anvin
2011-08-14 15:36                   ` [kernel-hardening] " H. Peter Anvin
2011-08-14 23:29                   ` James Morris
2011-08-14 23:29                     ` [kernel-hardening] " James Morris
2011-08-15  0:18                   ` Andi Kleen
2011-08-15  0:18                     ` [kernel-hardening] " Andi Kleen
2011-08-15  0:32                     ` Will Drewry
2011-08-15  0:58                       ` Andi Kleen
     [not found]                 ` <20110814152729.GU5782-qrUzlfsMFqo/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2011-08-14 16:08                   ` Vasiliy Kulikov
2011-08-14 16:08                     ` [kernel-hardening] " Vasiliy Kulikov
2011-08-14 16:08                     ` Vasiliy Kulikov
2011-08-15 18:51               ` Solar Designer
2011-08-15 18:51                 ` [kernel-hardening] " Solar Designer
2011-08-15 18:59                 ` H. Peter Anvin
2011-08-15 18:59                   ` [kernel-hardening] " H. Peter Anvin
2011-08-15 20:14                   ` Solar Designer
2011-08-15 20:14                     ` [kernel-hardening] " Solar Designer
2011-08-15 20:27                     ` Andi Kleen
2011-08-15 20:27                       ` [kernel-hardening] " Andi Kleen
2011-08-15 20:48                     ` H. Peter Anvin
2011-08-15 20:48                       ` [kernel-hardening] " H. Peter Anvin
2011-08-15 22:13                     ` Eric Paris
2011-08-15 22:13                       ` [kernel-hardening] " Eric Paris
2011-08-16  1:18                       ` Andi Kleen
2011-08-16  1:18                         ` [kernel-hardening] " Andi Kleen

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=20110813163252.GA18458@albatros \
    --to=segoon@openwall.com \
    --cc=hpa@zytor.com \
    --cc=jmorris@namei.org \
    --cc=kernel-hardening@lists.openwall.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=x86@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.