From: Rik van Riel <riel@redhat.com>
To: kernel-hardening@lists.openwall.com,
Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>,
Elena Reshetova <elena.reshetova@intel.com>,
Arnd Bergmann <arnd@arndb.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <h.peter.anvin@intel.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [kernel-hardening] Re: [RFC v4 PATCH 00/13] HARDENED_ATOMIC
Date: Thu, 10 Nov 2016 23:25:08 -0500 [thread overview]
Message-ID: <1478838308.11393.15.camel@redhat.com> (raw)
In-Reply-To: <CAGXu5jJpOxewaYTOFRKBS-YmzAGDY++guVFYdQh8vsJLU4zJzA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 754 bytes --]
On Thu, 2016-11-10 at 13:23 -0800, Kees Cook wrote:
> If we don't use opt-out for atomics, we're going to be in the same
> situation where we have to constantly review every commit with an
> atomic for exploitable refcount flaws. Kicking this down from
> "privilege escalation" to "DoS" is a significant change in the
> kernel's weaknesses.
The only way I see around that would be to totally get
rid of the name atomic_t, forcing people with out of
tree code to use kref_t, or whatever name we pick for
the variable type that can wrap.
Something like checkpatch or a patch checking bot
could warn whenever new code is submitted that uses
the counter type that can wrap.
Not sure whether I like my idea :)
--
All Rights Reversed.
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 473 bytes --]
next prev parent reply other threads:[~2016-11-11 4:35 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-10 20:24 [kernel-hardening] [RFC v4 PATCH 00/13] HARDENED_ATOMIC Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 01/13] Add architecture independent hardened atomic base Elena Reshetova
2016-11-10 20:41 ` [kernel-hardening] " David Windsor
2016-11-10 21:09 ` Peter Zijlstra
2016-11-10 21:35 ` Peter Zijlstra
2016-11-11 9:06 ` Reshetova, Elena
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 02/13] percpu-refcount: leave atomic counter unprotected Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 03/13] kernel: identify wrapping atomic usage Elena Reshetova
2016-11-10 21:58 ` [kernel-hardening] " Peter Zijlstra
2016-11-11 8:49 ` [kernel-hardening] " Reshetova, Elena
2016-11-19 13:28 ` [kernel-hardening] " Paul E. McKenney
2016-11-19 21:39 ` Kees Cook
2016-11-21 20:13 ` Paul E. McKenney
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 04/13] mm: " Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 05/13] fs: " Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 06/13] net: " Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 07/13] net: atm: " Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 08/13] security: " Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 09/13] drivers: identify wrapping atomic usage (part 1/2) Elena Reshetova
2016-11-10 21:48 ` [kernel-hardening] " Will Deacon
2016-11-11 8:57 ` [kernel-hardening] " Reshetova, Elena
2016-11-11 12:35 ` Mark Rutland
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 10/13] drivers: identify wrapping atomic usage (part 2/2) Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 11/13] x86: identify wrapping atomic usage Elena Reshetova
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 12/13] x86: implementation for HARDENED_ATOMIC Elena Reshetova
2016-11-10 20:40 ` [kernel-hardening] " Peter Zijlstra
2016-11-10 21:04 ` Kees Cook
2016-11-10 21:16 ` Peter Zijlstra
2016-11-10 21:32 ` Kees Cook
2016-11-10 21:46 ` Peter Zijlstra
2016-11-10 22:50 ` Peter Zijlstra
2016-11-10 23:07 ` Kees Cook
2016-11-10 23:30 ` Peter Zijlstra
2016-11-11 9:32 ` [kernel-hardening] " Reshetova, Elena
2016-11-11 10:29 ` [kernel-hardening] " Peter Zijlstra
2016-11-11 18:00 ` Kees Cook
2016-11-11 20:19 ` Peter Zijlstra
2016-11-10 21:33 ` Peter Zijlstra
2016-11-11 9:20 ` [kernel-hardening] " Reshetova, Elena
2016-11-10 20:24 ` [kernel-hardening] [RFC v4 PATCH 13/13] lkdtm: add tests for atomic over-/underflow Elena Reshetova
2016-11-10 20:37 ` [RFC v4 PATCH 00/13] HARDENED_ATOMIC Peter Zijlstra
2016-11-10 20:37 ` [kernel-hardening] " Peter Zijlstra
2016-11-10 20:48 ` Will Deacon
2016-11-10 20:48 ` [kernel-hardening] " Will Deacon
2016-11-10 21:01 ` Kees Cook
2016-11-10 21:01 ` [kernel-hardening] " Kees Cook
2016-11-10 21:23 ` David Windsor
2016-11-10 21:27 ` Kees Cook
2016-11-10 21:27 ` Kees Cook
2016-11-10 21:39 ` David Windsor
2016-11-10 21:39 ` David Windsor
2016-11-10 21:39 ` Peter Zijlstra
2016-11-10 21:13 ` Peter Zijlstra
2016-11-10 21:13 ` [kernel-hardening] " Peter Zijlstra
2016-11-10 21:23 ` Kees Cook
2016-11-10 21:23 ` [kernel-hardening] " Kees Cook
2016-11-11 4:25 ` Rik van Riel [this message]
2016-11-10 22:27 ` Greg KH
2016-11-10 23:15 ` Kees Cook
2016-11-10 23:15 ` Kees Cook
2016-11-10 23:38 ` Greg KH
2016-11-10 23:38 ` Greg KH
2016-11-11 7:50 ` David Windsor
2016-11-11 17:43 ` Kees Cook
2016-11-11 17:46 ` Peter Zijlstra
2016-11-11 18:04 ` Kees Cook
2016-11-11 20:17 ` Peter Zijlstra
2016-11-14 20:31 ` Kees Cook
2016-11-15 8:01 ` Peter Zijlstra
2016-11-15 16:50 ` Rik van Riel
2016-11-15 17:23 ` Kees Cook
2016-11-16 17:09 ` Rik van Riel
2016-11-16 17:32 ` Peter Zijlstra
2016-11-16 17:41 ` Rik van Riel
2016-11-16 17:34 ` Reshetova, Elena
2016-11-17 8:37 ` Peter Zijlstra
2016-11-17 9:04 ` Reshetova, Elena
2016-11-17 9:36 ` Peter Zijlstra
2016-11-17 9:36 ` Julia Lawall
2016-11-17 10:16 ` Peter Zijlstra
2016-11-17 11:19 ` Mark Rutland
2016-11-17 11:32 ` Julia Lawall
2016-11-17 12:59 ` Julia Lawall
2016-11-11 18:47 ` Mark Rutland
2016-11-11 19:39 ` Will Deacon
2016-11-11 18:31 ` Mark Rutland
2016-11-11 20:05 ` Peter Zijlstra
2016-11-15 10:36 ` Mark Rutland
2016-11-15 11:21 ` Peter Zijlstra
2016-11-15 18:02 ` Mark Rutland
2016-11-10 23:57 ` Peter Zijlstra
2016-11-10 23:57 ` Peter Zijlstra
2016-11-11 0:29 ` Colin Vidal
2016-11-11 12:41 ` Mark Rutland
2016-11-11 12:47 ` Peter Zijlstra
2016-11-11 13:00 ` Peter Zijlstra
2016-11-11 14:39 ` Thomas Gleixner
2016-11-11 14:48 ` Peter Zijlstra
2016-11-11 23:07 ` Peter Zijlstra
2016-11-13 11:03 ` Greg KH
2016-11-13 11:03 ` Greg KH
2016-11-10 20:56 ` Kees Cook
2016-11-10 20:56 ` [kernel-hardening] " Kees Cook
2016-11-11 3:20 ` David Windsor
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=1478838308.11393.15.camel@redhat.com \
--to=riel@redhat.com \
--cc=arnd@arndb.de \
--cc=elena.reshetova@intel.com \
--cc=h.peter.anvin@intel.com \
--cc=kernel-hardening@lists.openwall.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=will.deacon@arm.com \
/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.