Connection breaks for my macvtap

[Richa Marwaha]

Hi

I am trying to run some KVM fuzz testing where I have a tool called scapy
running on my host and guest which changes the data in the IP header of the
packages and send it out to the host and vice versa. I have macvtap setup
on my host (have tried both VEPA and Bridge mode).
My ssh connection to my guest breaks down after having send just 22 packets
and also the gnome crashes. I see the following message in the dmesg

dbus[545]: [system] Rejected send message, 2 matched rules;
type="method_return", sender=":1.0" (uid=0 pid=499
comm="/usr/lib/systemd/systemd-logind ") interface="(unset)"
member="(unset)" error name="(unset)" requested_reply="0"
destination=":1.17" (uid=42 pid=658 comm="/usr/bin/gnome-session -f
--debug
")

The connection to the guest restart but wanted to know what makes it
breakdown.

Regards,
Richa Marwaha

[Cole Robinson]

On 03/20/2013 12:53 PM, Richa Marwaha wrote:
>  Hi
>  
>  I am trying to run some KVM fuzz testing where I have a tool called scapy
>  running on my host and guest which changes the data in the IP header of the
>  packages and send it out to the host and vice versa. I have macvtap setup on
>  my host (have tried both VEPA and Bridge mode).
>  My ssh connection to my guest breaks down after having send just 22 packets
>  and also the gnome crashes. I see the following message in the dmesg
>  
>  dbus[545]: [system] Rejected send message, 2 matched rules;
>  type="method_return", sender=":1.0" (uid=0 pid=499
>  comm="/usr/lib/systemd/systemd-logind ") interface="(unset)"
> member="(unset)"
>  error name="(unset)" requested_reply="0"
> destination=":1.17" (uid=42 pid=658
>  comm="/usr/bin/gnome-session -f --debug ")
>  
>  The connection to the guest restart but wanted to know what makes it breakdown.
>   
Interesting Richa. Might want to bring this up on qemu-devel and try
reproducing with qemu git.

- Cole

[Richa Marwaha]

Hi Cole

The reason I posted it on fedora was because the qemu doesnot breaks its
just my guest ssh connection that breaks down with tht error. Will try to
recreate this issue with qemu git.

Regards,
Richa Marwaha
LTC Security
Email address:[e-mail]


                                                                                          
                                                   
  From:       Cole Robinson <crobinso(a)redhat.com&gt;                                   
                                                         
                                                                                          
                                                   
  To:         Richa Marwaha/Silicon Valley/IBM@IBMUS,                                     
                                                   
                                                                                          
                                                   
  Cc:         virt(a)lists.fedoraproject.org                                                
                                                   
                                                                                          
                                                   
  Date:       03/25/2013 02:16 PM                                                         
                                                   
                                                                                          
                                                   
  Subject:    Re: [fedora-virt] Connection breaks for my macvtap                          
                                                   
                                                                                          
                                                   





On 03/20/2013 12:53 PM, Richa Marwaha wrote:
>  Hi
>
>  I am trying to run some KVM fuzz testing where I have a tool called scapy
>  running on my host and guest which changes the data in the IP header of 
the
>  packages and send it out to the host and vice versa. I have macvtap
> setup 
on
>  my host (have tried both VEPA and Bridge mode).
>  My ssh connection to my guest breaks down after having send just 22 
packets
>  and also the gnome crashes. I see the following message in the dmesg
>
>  dbus[545]: [system] Rejected send message, 2 matched rules;
>  type="method_return", sender=":1.0" (uid=0 pid=499
>  comm="/usr/lib/systemd/systemd-logind ") interface="(unset)"
member="(unset)"
>  error name="(unset)" requested_reply="0"
> destination=":1.17" (uid=42 
pid=658
>  comm="/usr/bin/gnome-session -f --debug ")
>
>  The connection to the guest restart but wanted to know what makes it 
breakdown.
>  
Interesting Richa. Might want to bring this up on qemu-devel and try
reproducing with qemu git.

- Cole