From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 155841] New: Kernel panic with high network tarffic to KVM
 guest
Date: Fri, 02 Sep 2016 19:52:57 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=155841

            Bug ID: 155841
           Summary: Kernel panic with high network tarffic to KVM guest
           Product: Virtualization
           Version: unspecified
    Kernel Version: 3.16.7
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: fabian.dressler@clouz.de
        Regression: No

Created attachment 232051
  --> https://bugzilla.kernel.org/attachment.cgi?id=232051&action=edit
crashlog-screenshot

Our KVM host crashes randomly when there is high network traffic to the guest.
For the host crashlog see the attached screenshot.
We are using this guest as a Freifunk (freifunk.net) gateway. We suspect that
this occurs when to many nodes are connecting to the gateway.

At startup of the host error messages like the following are shown:
[   45.769454] kvm: zapping shadow pages for mmio generation wraparound
[   52.593232] kvm [1807]: vcpu0 unhandled rdmsr: 0x606
[   76.593085] kvm [1807]: vcpu0 unhandled rdmsr: 0x611
[   76.593138] kvm [1807]: vcpu0 unhandled rdmsr: 0x639
[   76.593183] kvm [1807]: vcpu0 unhandled rdmsr: 0x641
[   76.593227] kvm [1807]: vcpu0 unhandled rdmsr: 0x619
[   76.607495] kvm [1807]: vcpu0 unhandled rdmsr: 0x611
[   76.607559] kvm [1807]: vcpu0 unhandled rdmsr: 0x639
[   76.607609] kvm [1807]: vcpu0 unhandled rdmsr: 0x641
[   76.607658] kvm [1807]: vcpu0 unhandled rdmsr: 0x619

This happening under high network load is only our suspicion.

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