[Bug 155841] New: Kernel panic with high network tarffic to KVM guest

bugzilla-daemon
2016-09-02T19:53:03Z

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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