linux-kernel - Re: 3.16.1 - general protection fault

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:	Wed, 24 Sep 2014 21:18:27 +0100
From:	"Dr. David Alan Gilbert" <dave@...blig.org>
To:	Marcin Gibula <m.gibula@...il.com>
Cc:	linux-kernel@...r.kernel.org, aarcange@...hat.com
Subject: Re: 3.16.1 - general protection fault

* Marcin Gibula (m.gibula@...il.com) wrote:

Hi Marcin,

> Hi,
> 
> I've been playing with 3.16 kernel on my test machine as a KVM
> hypervisor and encountered the following crash twice (almost identical
> backtraces).
> 
> Sep 24 09:39:31 dev4 kernel: general protection fault: 0000 [#1] SMP

<snip>

> This machine is serving as NFS client and KVM hypervisor. I'm still
> not sure how to trigger it reliably (right now, I just have to run
> ubuntu instalation in VM guest multiple times and sometimes it
> triggers).
> 
> Attaching .config, slub.s and disassembled __kmalloc_node_track_caller function.

Yes, I hit something similar:

http://www.spinics.net/lists/linux-nfs/msg46047.html 'nfs: disallow duplicate pages in pgio page vectors'
http://www.spinics.net/lists/linux-nfs/msg46048.html 'nfs: can_coalesce_requests must enforce contiguity'

seem to stop the GPF's/crashes, although there's still something else
going on with a corruption I'm seeing every so often.

Dave

-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\ gro.gilbert @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.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/