From: Alan Cox <alan@linux.intel.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Vasiliy Kulikov <segoon@openwall.com>,
kernel-hardening@lists.openwall.com,
Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Kees Cook <kees@ubuntu.com>,
Valdis.Kletnieks@vt.edu,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: [kernel-hardening] Re: [PATCH 2/2] mm: restrict access to /proc/meminfo
Date: Wed, 28 Sep 2011 21:52:35 +0100 [thread overview]
Message-ID: <20110928215235.05d4f2e5@bob.linux.org.uk> (raw)
In-Reply-To: <1317241905.16137.516.camel@nimitz>
On Wed, 28 Sep 2011 13:31:45 -0700
Dave Hansen <dave@linux.vnet.ibm.com> wrote:
> On Tue, 2011-09-27 at 15:47 -0500, Christoph Lameter wrote:
> > On Tue, 27 Sep 2011, David Rientjes wrote:
> > > It'll turn into another one of our infinite number of
> > > capabilities. Does anything actually care about statistics at KB
> > > granularity these days?
> >
> > Changing that to MB may also break things. It may be better to have
> > consistent system for access control to memory management counters
> > that are not related to a process.
>
> We could also just _effectively_ make it output in MB:
>
> foo = foo & ~(1<<20)
I do not think that does what you intend 8)
I do like the idea - it avoids any interfaces vanishing and surprise
breakages while only CAP_SYS_whatever needs the real numbers
WARNING: multiple messages have this Message-ID (diff)
From: Alan Cox <alan@linux.intel.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Vasiliy Kulikov <segoon@openwall.com>,
kernel-hardening@lists.openwall.com,
Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Kees Cook <kees@ubuntu.com>,
Valdis.Kletnieks@vt.edu,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] mm: restrict access to /proc/meminfo
Date: Wed, 28 Sep 2011 21:52:35 +0100 [thread overview]
Message-ID: <20110928215235.05d4f2e5@bob.linux.org.uk> (raw)
In-Reply-To: <1317241905.16137.516.camel@nimitz>
On Wed, 28 Sep 2011 13:31:45 -0700
Dave Hansen <dave@linux.vnet.ibm.com> wrote:
> On Tue, 2011-09-27 at 15:47 -0500, Christoph Lameter wrote:
> > On Tue, 27 Sep 2011, David Rientjes wrote:
> > > It'll turn into another one of our infinite number of
> > > capabilities. Does anything actually care about statistics at KB
> > > granularity these days?
> >
> > Changing that to MB may also break things. It may be better to have
> > consistent system for access control to memory management counters
> > that are not related to a process.
>
> We could also just _effectively_ make it output in MB:
>
> foo = foo & ~(1<<20)
I do not think that does what you intend 8)
I do like the idea - it avoids any interfaces vanishing and surprise
breakages while only CAP_SYS_whatever needs the real numbers
WARNING: multiple messages have this Message-ID (diff)
From: Alan Cox <alan@linux.intel.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Vasiliy Kulikov <segoon@openwall.com>,
kernel-hardening@lists.openwall.com,
Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Kees Cook <kees@ubuntu.com>,
Valdis.Kletnieks@vt.edu,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] mm: restrict access to /proc/meminfo
Date: Wed, 28 Sep 2011 21:52:35 +0100 [thread overview]
Message-ID: <20110928215235.05d4f2e5@bob.linux.org.uk> (raw)
In-Reply-To: <1317241905.16137.516.camel@nimitz>
On Wed, 28 Sep 2011 13:31:45 -0700
Dave Hansen <dave@linux.vnet.ibm.com> wrote:
> On Tue, 2011-09-27 at 15:47 -0500, Christoph Lameter wrote:
> > On Tue, 27 Sep 2011, David Rientjes wrote:
> > > It'll turn into another one of our infinite number of
> > > capabilities. Does anything actually care about statistics at KB
> > > granularity these days?
> >
> > Changing that to MB may also break things. It may be better to have
> > consistent system for access control to memory management counters
> > that are not related to a process.
>
> We could also just _effectively_ make it output in MB:
>
> foo = foo & ~(1<<20)
I do not think that does what you intend 8)
I do like the idea - it avoids any interfaces vanishing and surprise
breakages while only CAP_SYS_whatever needs the real numbers
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-09-28 20:52 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-27 17:54 [kernel-hardening] [PATCH 1/2] mm: restrict access to slab files under procfs and sysfs Vasiliy Kulikov
2011-09-27 17:54 ` Vasiliy Kulikov
2011-09-27 17:54 ` Vasiliy Kulikov
2011-09-27 17:56 ` [kernel-hardening] [PATCH 2/2] mm: restrict access to /proc/meminfo Vasiliy Kulikov
2011-09-27 17:56 ` Vasiliy Kulikov
2011-09-27 17:56 ` Vasiliy Kulikov
2011-09-27 18:27 ` [kernel-hardening] " David Rientjes
2011-09-27 18:27 ` David Rientjes
2011-09-27 18:27 ` David Rientjes
2011-09-27 19:14 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-27 19:14 ` Vasiliy Kulikov
2011-09-27 19:14 ` Vasiliy Kulikov
2011-09-27 19:38 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-27 19:38 ` Vasiliy Kulikov
2011-09-27 19:38 ` Vasiliy Kulikov
2011-09-27 20:03 ` [kernel-hardening] " Christoph Lameter
2011-09-27 20:03 ` Christoph Lameter
2011-09-27 20:03 ` Christoph Lameter
2011-09-27 20:33 ` [kernel-hardening] " David Rientjes
2011-09-27 20:33 ` David Rientjes
2011-09-27 20:33 ` David Rientjes
2011-09-27 20:47 ` [kernel-hardening] " Christoph Lameter
2011-09-27 20:47 ` Christoph Lameter
2011-09-27 20:47 ` Christoph Lameter
2011-09-28 20:31 ` [kernel-hardening] " Dave Hansen
2011-09-28 20:31 ` Dave Hansen
2011-09-28 20:31 ` Dave Hansen
2011-09-28 20:52 ` Alan Cox [this message]
2011-09-28 20:52 ` Alan Cox
2011-09-28 20:52 ` Alan Cox
2011-09-29 0:43 ` [kernel-hardening] " Valdis.Kletnieks
2011-09-29 0:43 ` Valdis.Kletnieks
2011-09-29 14:11 ` [kernel-hardening] " Christoph Lameter
2011-09-29 14:11 ` Christoph Lameter
2011-09-29 14:11 ` Christoph Lameter
2011-09-29 16:18 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-29 16:18 ` Vasiliy Kulikov
2011-09-29 16:18 ` Vasiliy Kulikov
2011-09-29 16:30 ` [kernel-hardening] " Dave Hansen
2011-09-29 16:30 ` Dave Hansen
2011-09-29 16:30 ` Dave Hansen
2011-09-29 16:43 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-29 16:43 ` Vasiliy Kulikov
2011-09-29 16:57 ` Valdis.Kletnieks
2011-09-29 16:57 ` Valdis.Kletnieks
2011-09-29 17:25 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-29 17:25 ` Vasiliy Kulikov
2011-09-29 17:28 ` Vasiliy Kulikov
2011-09-29 17:28 ` Vasiliy Kulikov
2011-09-29 17:28 ` Vasiliy Kulikov
2011-09-28 21:46 ` [kernel-hardening] " Andrew Morton
2011-09-28 21:46 ` Andrew Morton
2011-09-28 21:46 ` Andrew Morton
2011-09-30 19:53 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-30 19:53 ` Vasiliy Kulikov
2011-09-30 19:53 ` Vasiliy Kulikov
2011-09-30 20:03 ` [kernel-hardening] " Andrew Morton
2011-09-30 20:03 ` Andrew Morton
2011-09-30 20:03 ` Andrew Morton
2011-09-30 20:12 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-30 20:12 ` Vasiliy Kulikov
2011-09-30 20:12 ` Vasiliy Kulikov
2011-09-30 20:15 ` [kernel-hardening] " Dave Hansen
2011-09-30 20:15 ` Dave Hansen
2011-09-30 20:15 ` Dave Hansen
2011-09-27 18:08 ` [kernel-hardening] Re: [PATCH 1/2] mm: restrict access to slab files under procfs and sysfs Christoph Lameter
2011-09-27 18:08 ` Christoph Lameter
2011-09-27 18:08 ` Christoph Lameter
2011-09-27 19:16 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-27 19:16 ` Vasiliy Kulikov
2011-09-27 19:16 ` Vasiliy Kulikov
2011-09-27 19:35 ` [kernel-hardening] " Christoph Lameter
2011-09-27 19:35 ` Christoph Lameter
2011-09-27 19:35 ` Christoph Lameter
2011-09-27 18:21 ` [kernel-hardening] " David Rientjes
2011-09-27 18:21 ` David Rientjes
2011-09-27 18:21 ` David Rientjes
2011-09-27 20:00 ` [kernel-hardening] " Pekka Enberg
2011-09-27 20:00 ` Pekka Enberg
2011-09-27 20:00 ` Pekka Enberg
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=20110928215235.05d4f2e5@bob.linux.org.uk \
--to=alan@linux.intel.com \
--cc=Valdis.Kletnieks@vt.edu \
--cc=akpm@linux-foundation.org \
--cc=cl@gentwo.org \
--cc=dave@linux.vnet.ibm.com \
--cc=kees@ubuntu.com \
--cc=kernel-hardening@lists.openwall.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mpm@selenic.com \
--cc=penberg@kernel.org \
--cc=rientjes@google.com \
--cc=segoon@openwall.com \
--cc=torvalds@linux-foundation.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.