Re: [Xen-devel] [PATCH 1/2] libxl: do not assume Dom0 backend while listing disks and nics

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Marek Marczykowski writes ("[PATCH 1/2] libxl: do not assume Dom0 backend while 
listing disks and nics"):
> One more place where code assumed that all backends are in dom0. List
> devices in domain device/ tree, instead of backend/ of dom0.
> Additionally fix libxl_devid_to_device_{nic,disk} to fill backend_domid
> properly.

After this change, can a guest cause a backend to be leaked when the
domain is destroyed ?  If it deletes the contents of the frontend
directory in xenstore, I think the device will no longer show up in
the lists and so won't be deleted when the guest goes away.

Would iterating over all domains looking for backends for a particular
frontend domain work ?  That would allow a rogue guest to cause
entries to appear in the list of course, by pretending to be a
backend domain...

Ian.

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