WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] What is the current state of Dom0 kernel support? / cras

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] What is the current state of Dom0 kernel support? / crash
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 22 Jul 2009 12:14:37 -0700
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Wed, 22 Jul 2009 12:15:09 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20090721130342.GQ24960@xxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <652FFB2C8F91E3428799B1FFF8B490C95FCF55132A@xxxxxxxxxxxxxxxxxxxxxxxxx> <4A3AC144.9010602@xxxxxxxxxxxxxxx> <4A450DA0.9010307@xxxxxxxx> <1246040465.5626.82.camel@xxxxxxxxxxxxxxxxxxxxx> <4A45138A.6010407@xxxxxxxx> <20090708221423.GE24960@xxxxxxxxxxxxxxx> <4A553888.1090302@xxxxxxxx> <20090709222414.GL24960@xxxxxxxxxxxxxxx> <20090715082242.GB24960@xxxxxxxxxxxxxxx> <20090721130342.GQ24960@xxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2
On 07/21/09 06:03, Pasi Kärkkäinen wrote:
> I just tried the latest 32b PAE rebase/master tree (2.6.31-rc3).
>
> http://pasik.reaktio.net/xen/pv_ops-dom0-debug/pv_ops-dom0-log-10-rebase-master-with-highpte.txt
>
> Checking if this processor honours the WP bit even in supervisor mode...
> BUG: unable to handle kernel NULL pointer dereference at (null)
> IP: [<c058cdcb>] xen_evtchn_do_upcall+0xcc/0x13f
> *pdpt = 000000003d275001 
> Thread overran stack, or stack corrupted
> Oops: 0000 [#1] SMP 
> last sysfs file: 
> Modules linked in:
>
> Pid: 0, comm: swapper Not tainted (2.6.31-rc3 #20) P8SC8
> EIP: 0061:[<c058cdcb>] EFLAGS: 00010046 CPU: 0
> EIP is at xen_evtchn_do_upcall+0xcc/0x13f
> EAX: 00000000 EBX: ffffffff ECX: 00000000 EDX: 00000000
> ESI: 00000000 EDI: c08ec558 EBP: c087eedc ESP: c087eea0
>  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: e021
> Process swapper (pid: 0, ti=c087e000 task=c083b1a0 task.ti=c087e000)
> Stack:
>  00001a6e 00000220 00000200 00000000 00000000 00000000 e3201014 c08ec558
> <0> c087eee4 f5681000 e3201010 00000000 00000000 c09017f8 f54ff000 c087ef20
> <0> c0409927 00000000 c09017f8 f54ff000 c09017f8 f54ff000 c087ef20 c0843f70
> Call Trace:
>  [<c0409927>] ? xen_do_upcall+0x7/0xc
>  [<c0404581>] ? xen_pte_clear+0x9/0x12
>  [<c0427a94>] ? set_pte_vaddr+0xb4/0xc4
>  [<c0426c8c>] ? __native_set_fixmap+0x25/0x30
>  [<c040471a>] ? xen_set_fixmap+0xc7/0xcc
>  [<c0897d86>] ? mem_init+0x24a/0x298
>  [<c088367e>] ? start_kernel+0x14b/0x2cd
>  [<c088336f>] ? unknown_bootoption+0x0/0x18e
>  [<c0883082>] ? i386_start_kernel+0x71/0x79
>  [<c0886188>] ? xen_start_kernel+0x52a/0x533
> Code: d0 89 45 cc 89 55 c8 eb 16 0f bc c8 03 4d d4 8b 04 8a 83 f8 ff 74 f8
> 8b 55 e4 e8 36 de e7 ff 8b 55 f0 8b 45 d0 03 
> 05 1c 0c 97 c0 <8b> 0c 10 8b 55 e8 8b 45 cc 23 0c 82 8b 45 c8 8b 04 82 8b 15
> 18 
> EIP: [<c058cdcb>] xen_evtchn_do_upcall+0xcc/0x13f SS:ESP e021:c087eea0
> CR2: 0000000000000000
> ---[ end trace 4eaa2a86a8e2da22 ]---
> Kernel panic - not syncing: Fatal exception in interrupt
>   

Haven't seen that one before.  The stack backtrace is a bit fuzzy; do
you have CONFIG_FRAMEPOINTER enabled?  And if you have CONFIG_DEBUGINFO
enabled, you can map the eip c058cdcb to a specific source line (its not
clear to me which pointer is NULL).

Thanks,
    J

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>