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

[SergeiFranco]

brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.00270e160ec4       no              eth1


ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> 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: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/ether 00:27:0e:16:0e:c4 brd ff:ff:ff:ff:ff:ff
6: tap0: <BROADCAST,MULTICAST,UP,LOWER_UP> 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             anywhere            state RELATED,ESTABLISHED 
ACCEPT     all  --  192.168.1.0/24       anywhere            
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ssh state NEW limit: avg 1/min burst 5 
LOG        tcp  --  anywhere             anywhere            tcp dpt:ssh state NEW limit: avg 1/min burst 5 LOG level warning prefix `rate-limited SSH: ' 
REJECT     tcp  --  anywhere             anywhere            tcp dpt:ssh state NEW reject-with icmp-port-unreachable 
DROP       udp  -- !192.168.1.0/24       anywhere            udp 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       anywhere            ctstate NEW 
ACCEPT     all  --  192.168.1.0/24       anywhere            ctstate NEW 
ACCEPT     all  --  anywhere             anywhere            ctstate 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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https://bugs.launchpad.net/bugs/776936

Title:
  Running KVM guest causes kernel panic on host