[Bug 776936] Re: Running KVM guest causes kernel panic on host

2012-10-23 Thread Stefan Bader
Reading through comments again I am rather sure this should be in fixed
now.

** Changed in: linux (Ubuntu)
   Status: Fix Committed => Fix Released

** Changed in: linux (Ubuntu)
 Assignee: Stefan Bader (stefan-bader-canonical) => (unassigned)

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-12 Thread Serge Hallyn
Great, thanks for the info, Sergei.

** Changed in: qemu-kvm (Ubuntu)
   Status: New => Invalid

** Changed in: linux (Ubuntu)
   Status: New => Fix Committed

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Stefan Bader (stefan-bader-canonical)

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-12 Thread SergeiFranco
Good news! kernel from proposed repositories works. It didn't crash
overnight in bridge mode.

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-12 Thread Serge Hallyn
@Adam,

Yours may be the same bug, but may not.  Please open a new bug with the
information which I"d asked of Sergei, in particular your /proc/cpuinfo,
uname -a, iptables -L, brctl show, and virsh dumpxml and release info
for an affected guest, and any relevant log info from both guest and
host.

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-12 Thread Adam Koczur
I have the same problem and kernel 2.6.38-9-server from natty-proposed
does not fix anything. Once I start any kvm guest, the whole machine
hangs after few seconds throwing kernel panic.

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Re: [Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-11 Thread Serge Hallyn
Quoting SergeiFranco (776...@bugs.launchpad.net):
> This problem looks very similar to this: http://www.spinics.net/lists
> /linux-net/msg17690.html

Ah, thanks very much.  That commit is in the natty-proposed kernel, but
not yet in the natty kernel.  Can you test the natty-proposed kernel and
confirm whether that fixes the bug for you?

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-11 Thread SergeiFranco
This problem looks very similar to this: http://www.spinics.net/lists
/linux-net/msg17690.html

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-11 Thread SergeiFranco
Yes, membalooning is enabled right now:


  deluge
  de900b25-6dc3-cfd6-4fb1-55c6f9755b00
  524288
  524288
  1
  
hvm

   

 
  

 
 

 
 

 
   

 
  destroy

 
  restart

 
  destroy  

 
   

 
/usr/bin/kvm   

 


 
  

 
   

 
   

 
 

 
 

 
   

 
  



  
  
  


  


  




  
  


  

  



and network:

  default
  19ff9987-5265-ac1c-4ae2-eda8e280afa4
  
  
  

  

  


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Re: [Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-11 Thread Serge Hallyn
Quoting SergeiFranco (776...@bugs.launchpad.net):
> In nat mode it does not panic.

Thanks for that info.

Is that true even with memballoon enabled?

...

> I need this box in bridge mode (it is a virtual server after all).

Absolutely.  This just gives us a better chance of tracking down the
bug(s).

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-11 Thread SergeiFranco
In nat mode it does not panic.

Having virtual machine in nat mode is piss poor, especially when the
network performance in nat mode is very unreliable (perhaps issue with
MTU? apt-get install gets stuck on 0% [Waiting for headers], wget
google.com also hangs, while I can ping everything fine), another issue
is I have to port forward and deal will all associated nightmare. I am
seriously considering moving to physical box, or ditch ubuntu, install
debian and go with xen...

I need this box in bridge mode (it is a virtual server after all).

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-11 Thread SergeiFranco
Today I noticed that although I removed the membaloon it didn't stick (possibly 
due to panic not syncing the file).
I removed once again membaloon and started the guest with little bit better 
results.
The system does not freeze immediately, but it leaves a lot of "oopses" in the 
syslog/dmesg.
I am attaching these "oopses".

The highlight of the "oopses" is "BUG: unable to handle kernel paging
request at".

I am going to try kvm in NAT mode (btw how do I do that?) and see if
this is happening still.

** Attachment added: "messages"
   
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/776936/+attachment/2124149/+files/messages

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Re: [Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-10 Thread SergeiFranco
Hi, here is the iptables-save output:


*filter
:INPUT DROP [992:148145]
:FORWARD ACCEPT [24:1496]
:OUTPUT ACCEPT [215528:64537610]
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -s 192.168.1.0/24 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m limit --limit
1/min -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m limit --limit
1/min -j LOG --log-prefix "rate-limited SSH: "
-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -j REJECT
--reject-with icmp-port-unreachable
-A INPUT ! -s 192.168.1.0/24 -p udp -m udp --dport 53 -j DROP
-A FORWARD -i eth1 -o tun0 -j ACCEPT
-A FORWARD -i br0 -o tun0 -j ACCEPT
-A FORWARD -i eth1 -s 192.168.1.0/24 -m conntrack --ctstate NEW -j ACCEPT
-A FORWARD -i br0 -s 192.168.1.0/24 -m conntrack --ctstate NEW -j ACCEPT
-A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
COMMIT
*nat
:PREROUTING ACCEPT [1920:290675]
:POSTROUTING ACCEPT [16622:1247968]
:OUTPUT ACCEPT [16618:1247716]
-A POSTROUTING -j MASQUERADE
COMMIT
*mangle
:PREROUTING ACCEPT [171074:67106601]
:INPUT ACCEPT [169741:66910030]
:FORWARD ACCEPT [24:1496]
:OUTPUT ACCEPT [215528:64537610]
:POSTROUTING ACCEPT [215565:64541384]
COMMIT


On 11 May 2011 10:29, Serge Hallyn <776...@bugs.launchpad.net> wrote:

> Can you append whatever script you use to set up the iptables rules, so
> I can as closely as possible emulate?
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/776936
>
> Title:
>  Running KVM guest causes kernel panic on host
>
> Status in “linux” package in Ubuntu:
>  New
> Status in “qemu-kvm” package in Ubuntu:
>  New
>
> Bug description:
>  Binary package hint: qemu-kvm
>
>  as per http://ubuntuforums.org/showthread.php?p=10766552#post10766552
>
>  Host machine Ubuntu Natty server 2.6.38-8-generic i686
>  Guest machine Ubuntu Natty server 2.6.38-8-generic i686
>
>  Panic occurs in range of minutes to hours of uptime. It is load
>  independent.
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776936/+subscribe
>

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-10 Thread Serge Hallyn
Can you append whatever script you use to set up the iptables rules, so
I can as closely as possible emulate?

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  Running KVM guest causes kernel panic on host

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Re: [Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-08 Thread Serge Hallyn
Quoting SergeiFranco (776...@bugs.launchpad.net):
> One thing I noticed that kernel panic comes much faster if there is network 
> activity on the guest. Although I might be wrong...
> Anything else I could do? I will try to run guest without any network 
> activity and see if it is panics.

If it could be shown that you can't reproduce either with a NATed
bridge, or without the custom iptables rules, that would be very
informative.

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-08 Thread SergeiFranco
One thing I noticed that kernel panic comes much faster if there is network 
activity on the guest. Although I might be wrong...
Anything else I could do? I will try to run guest without any network activity 
and see if it is panics.

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-07 Thread Serge Hallyn
I couldn't reproduce this with a simple kvm guest on i386 natty host
(64-bit hardware).  I'll try mimicking your networking setup, as one of
you panics suggests a netfilter+bridge issue (though the other did not,
so I'm not optimistic).

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  Running KVM guest causes kernel panic on host

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-05 Thread SergeiFranco
brctl show
bridge name bridge id   STP enabled interfaces
br0 8000.00270e160ec4   no  eth1


ip link
1: lo:  mtu 16436 qdisc noqueue state UNKNOWN 
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth1:  mtu 1500 qdisc pfifo_fast state UP 
qlen 1000
link/ether 00:27:0e:16:0e:c4 brd ff:ff:ff:ff:ff:ff
3: br0:  mtu 1500 qdisc noqueue state UNKNOWN 
link/ether 00:27:0e:16:0e:c4 brd ff:ff:ff:ff:ff:ff
6: tap0:  mtu 1000 qdisc pfifo_fast state 
UNKNOWN qlen 100
link/ether 06:fc:dc:4a:a4:cb brd ff:ff:ff:ff:ff:ff

ufw status
Status: inactive


iptables -L
Chain INPUT (policy DROP)
target prot opt source   destination 
ACCEPT all  --  anywhere anywhere
ACCEPT all  --  anywhere anywherestate 
RELATED,ESTABLISHED 
ACCEPT all  --  192.168.1.0/24   anywhere
ACCEPT tcp  --  anywhere anywheretcp dpt:ssh state 
NEW limit: avg 1/min burst 5 
LOGtcp  --  anywhere anywheretcp dpt:ssh state 
NEW limit: avg 1/min burst 5 LOG level warning prefix `rate-limited SSH: ' 
REJECT tcp  --  anywhere anywheretcp dpt:ssh state 
NEW reject-with icmp-port-unreachable 
DROP   udp  -- !192.168.1.0/24   anywhereudp dpt:domain 

Chain FORWARD (policy ACCEPT)
target prot opt source   destination 
ACCEPT all  --  anywhere anywhere
ACCEPT all  --  anywhere anywhere
ACCEPT all  --  192.168.1.0/24   anywherectstate NEW 
ACCEPT all  --  192.168.1.0/24   anywherectstate NEW 
ACCEPT all  --  anywhere anywherectstate 
RELATED,ESTABLISHED 

Chain OUTPUT (policy ACCEPT)
target prot opt source   destination


iptables -t nat -L
Chain PREROUTING (policy ACCEPT)
target prot opt source   destination 

Chain INPUT (policy ACCEPT)
target prot opt source   destination 

Chain OUTPUT (policy ACCEPT)
target prot opt source   destination 

Chain POSTROUTING (policy ACCEPT)
target prot opt source   destination 
MASQUERADE  all  --  anywhere anywhere

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  Running KVM guest causes kernel panic on host

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-05 Thread Serge Hallyn
(installing an i386 natty desktop in order to try to reproduce)

Could you post your host network configuration?  Results of 'brctl
show', 'ip link', 'ufw status' and 'iptables -L' and 'iptables -t nat
-L' (all done as root or under sudo).

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  Running KVM guest causes kernel panic on host

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-05 Thread Serge Hallyn
** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => Critical

** Also affects: linux (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-05 Thread SergeiFranco
Highlights of this panic is:

"Kernel panic - not syncing: Fatal exception in interrupt"

** Attachment added: "another panic"
   
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/776936/+attachment/2113916/+files/kvm_panic_002.jpg

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-05 Thread SergeiFranco
I ran it while I was "watch 'dmesg | tail'" and caught glimpse of this:

[91476.783713]  [] ? __netif_receive_skb+0x180/0x4e0
[91476.785510]  [] ? process_backlog+0x92/0x160
[91476.787300]  [] ? net_rx_action+0x10d/0x200
[91476.789093]  [] ? __do_softirq+0x82/0x170
[91476.790892]  [] ? __do_softirq+0x0/0x170
[91476.792808][] ? netif_rx_ni+0x28/0x30
[91476.794925]  [] ? tun_chr_aio_write+0x23d/0x4b0
[91476.797021]  [] ? tun_chr_aio_write+0x0/0x4b0
[91476.799036]  [] ? do_sync_readv_writev+0xa6/0xe0
[91476.800995]  [] ? do_readv_writev+0xa0/0x190

It still panics after I deleted membaloon (and redefined the config) and 
disabled the KSM.
I can only afford to experiment once a day, as I don't want for it to panic 
during resync for obvious reasons.

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  Running KVM guest causes kernel panic on host

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-04 Thread SergeiFranco
** Attachment added: "apport report"
   
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/776936/+attachment/2113781/+files/apport.qemu-kvm.GeDpUE.apport

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Re: [Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-04 Thread Serge Hallyn
Sorry about that.  Could you try doing

   apport-cli qemu-kvm

Then when it asks

  What would you like to do? Your options are:
  S: Send report (813.3 KB)
  V: View report
  K: Keep report file for sending later or copying to somewhere else
  C: Cancel
  Please choose (S/V/K/C):

please choose K.  Then attach the file into which it says it placed the
report to this bug (or simply reply to this email with that file
appended or attached).

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-04 Thread SergeiFranco
I am trying to apport-collect 776936 and I get the text mode browser in
terminal, I login and allow access, then what? Little bit confusing, and
I could not find the non-disruptive way to exit the apport-collect
except ctrl+z and kill. I am not sure if it even did anything.

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-04 Thread Serge Hallyn
Thanks for submitting this bug and helping to make Ubuntu better.

In order to give us some more info on your system, could you please run
'apport-collect 776936'?

I wonder whether disable KSM and memballoon might help.  Could you
disable memballoon by doing

   virsh edit deluge

and deleting the lines:

   
  


Then disable KSM by editing /etc/default/qemu-kvm and changing

  KSM_ENABLED=1
to
  KSM_ENABLED=0

then restarting qemu-kvm:

  restart qemu-kvm

Then see if the problem still reproduces.

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-04 Thread SergeiFranco
** Attachment added: "panic screen"
   
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/776936/+attachment/2111283/+files/kvm_panic.jpg

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[Bug 776936] Re: Running KVM guest causes kernel panic on host

2011-05-04 Thread SergeiFranco
** Attachment added: "dmesg (host)"
   
https://bugs.launchpad.net/bugs/776936/+attachment/2111282/+files/dmesg.host.txt

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https://bugs.launchpad.net/bugs/776936

Title:
  Running KVM guest causes kernel panic on host

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