linux-kernel - Re: [PATCH 1 of 9] Lock the entire mm to prevent any mmu related operation to happen

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.64.0804161214170.14657@schroedinger.engr.sgi.com>
Date:	Wed, 16 Apr 2008 12:15:08 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Robin Holt <holt@....com>
cc:	Andrea Arcangeli <andrea@...ranet.com>, akpm@...ux-foundation.org,
	Nick Piggin <npiggin@...e.de>,
	Steve Wise <swise@...ngridcomputing.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-mm@...ck.org,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	Roland Dreier <rdreier@...co.com>,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org,
	Avi Kivity <avi@...ranet.com>, kvm-devel@...ts.sourceforge.net,
	general@...ts.openfabrics.org, Hugh Dickins <hugh@...itas.com>
Subject: Re: [PATCH 1 of 9] Lock the entire mm to prevent any mmu related
 operation to happen

On Wed, 16 Apr 2008, Robin Holt wrote:

> On Wed, Apr 16, 2008 at 11:35:38AM -0700, Christoph Lameter wrote:
> > On Wed, 16 Apr 2008, Robin Holt wrote:
> > 
> > > I don't think this lock mechanism is completely working.  I have
> > > gotten a few failures trying to dereference 0x100100 which appears to
> > > be LIST_POISON1.
> > 
> > How does xpmem unregistering of notifiers work?
> 
> For the tests I have been running, we are waiting for the release
> callout as part of exit.

Some more details on the failure may be useful. AFAICT list_del[_rcu] is 
the culprit here and that is only used on release or unregister.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/