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    SubjectRe: [PATCH 0/2 v3] kvm: notify host when guest panicked
    On Wed, Mar 14, 2012 at 06:58:47PM +0800, Wen Congyang wrote:
    > 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...
    >
    So what?

    --
    Gleb.


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