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]
Date:	Tue, 19 Dec 2006 16:20:37 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Dave Jones <davej@...hat.com>
CC:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Hugh Dickins <hugh@...itas.com>,
	Chris Rankin <cj.rankin@...world.com>
Subject: Re: -mm merge plans for 2.6.20

Dave Jones wrote:

> Eeek! page_mapcount(page) went negative! (-2)

Hmm, probably happened once before, too.

>   page->flags = 404

What's that? PG_referenced|PG_reserved? So I'd say it is likely
that some driver has got its refcounting wrong.

Unfortunately, this debugging output is almost useless when it
comes to trying to track down the problem any further.

And I see we've got another report for 2.6.19.1 from Chris, which
is equally vague.

IMO the pattern is much too consistent to be able to attribute
them all to hardware problems. And considering it takes so long
for these things to appear, can we get something like the attached
patch upstream at least until we manage to stamp them out? Any
other debugging info we can add?

-- 
SUSE Labs, Novell Inc.

View attachment "mm-rmap-debug-more.patch" of type "text/plain" (4147 bytes)

Powered by blists - more mailing lists