Re: [PATCH net-net 0/4] Increase the limit of tuntap queues

From: David Miller
Date: Sun Nov 23 2014 - 20:23:32 EST

From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Date: Sun, 23 Nov 2014 22:30:32 +0200

> qemu runs in the host, but it's unpriveledged: it gets
> passed tun FDs by a priveledged daemon, and it only
> has the rights to some operations,
> in particular to attach and detach queues.
> The assumption always was that this operation is safe
> and can't make kernel run out of resources.

This creates a rather rediculous situation in my opinion.

Configuring a network device is a privileged operation, the daemon
should be setting this thing up.

In no other context would we have to worry about something like this.
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