[fedora-virt] Connection breaks for my macvtap

Cole Robinson crobinso at redhat.com
Mon Mar 25 18:14:16 UTC 2013

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

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