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SubjectRe: [PATCH 0/2 v3] kvm: notify host when guest panicked
At 03/14/2012 06:52 PM, Avi Kivity Wrote:
> On 03/14/2012 12:52 PM, Wen Congyang wrote:
>>>
>>>> If so, is this channel visible to guest userspace? If the channle is visible to guest
>>>> userspace, the program running in userspace may write the same message to the channel.
>>>
>>> Access control is via permissions. You can have udev scripts assign
>>> whatever uid and gid to the port of your interest. By default, all
>>> ports are only accessible to the root user.
>>
>> We should also prevent root user writing message to this channel if it is
>> used for panicked notification.
>>
>
> Why? root can easily cause a panic.
>

root user can write the same message to virtio-serial while the guest is running...

Thanks
Wen Congyang


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