linux-kernel - Re: 2.6.25-mm1: kmmcd NULL pointer dereference at klist

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 for Android: free password hash cracker in your pocket

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

Date:	Mon, 12 May 2008 19:10:41 +0200
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andy Isaacson <adi@...apodia.org>, linux-kernel@...r.kernel.org,
	rjw@...k.pl
Subject: Re: 2.6.25-mm1: kmmcd NULL pointer dereference at
 klist_del+0xe/0x30

On Fri, 9 May 2008 16:47:38 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Fri, 9 May 2008 10:19:56 -0700
> Andy Isaacson <adi@...apodia.org> wrote:
> 
> > Got this twice with 2.6.25-mm1 on my Thinkpad X40, AData 16GB SDHC card
> > in mmc0 but no filesystem mounted.  I think the oops happened at
> > suspend/resume time.  Previous kernel was 2.6.25-rc5-mm1 which didn't
> > exhibit this problem across multiple suspend-resume cycles.
> > 
> > Complete logs and pretty much everything else you could want at
> > http://web.hexapodia.org/~adi/bobble/bobble_2.6.25-mm1-dirty_20080509100634/
> > 
> > [104375.816331] BUG: unable to handle kernel NULL pointer dereference at 0000000c
> > [104375.816338] IP: [<c02d86ce>] klist_del+0xe/0x30
> 
> This could be one of those nasty situations where one driver leaves a mess
> behind it and then another driver later comes along and trips over that
> mess.
> 

There were some problems with removing devices during suspend (which
the MMC layer does), but AFAIK those patches were backed out and were
only supposed to come back in a form that allowed such usage. Rafael
should have the most correct information on that subject.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  rdesktop, core developer          http://www.rdesktop.org
--
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/