linux-kernel - Re: 2.6.18: Kernel BUG at mm/rmap.c:522

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: <4523BE45.5050205@yahoo.com.au>
Date:	Wed, 04 Oct 2006 23:59:33 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andre Noll <maan@...temlinux.org>
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org, andrea@...e.de,
	riel@...hat.com
Subject: Re: 2.6.18: Kernel BUG at mm/rmap.c:522

Andre Noll wrote:
> Hi
> 
> MATLAB triggers the following bug on both of our new 16-way opteron
> machines (64G Ram): The same kernel is running with no problems on a
> bunch of smaller (8-way, 4-way, max 32G Ram) cluster nodes.
> 
> Any hints?
> Andre
> 
> 
> ----------- [cut here ] --------- [please bite here ] ---------
> Kernel BUG at ...aid0/home/maan/scm/stable/linux-2.6.18.y/mm/rmap.c:522

Ah, this old thing. I hope it is repeatable?

What we really want is the bit before this, the "Eeek! page_mapcount went
negative" part.

It is also nice if we can work out where the page actually came from. The
following attached patch should help out a bit with that, if you could
run with it?

Thanks a lot for reporting, this is very useful.

Nick

-- 
SUSE Labs, Novell Inc.

View attachment "mm-rmap-debug-more.patch" of type "text/plain" (3864 bytes)