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Re: [libvirt] [PATCH] apparmor: QEMU bridge helper policy updates

On Mon, 2012-03-12 at 09:13 -0400, Corey Bryant wrote:
> This patch provides AppArmor policy updates for the QEMU bridge helper.
> The QEMU bridge helper is a SUID executable exec'd by QEMU that drops
> capabilities to CAP_NET_ADMIN and adds a tap device to a network
> bridge. For more details on the helper, please refer to:
> http://lists.gnu.org/archive/html/qemu-devel/2012-01/msg03562.html
> Signed-off-by: Corey Bryant <coreyb linux vnet ibm com>

I've not used the helper personally, but the policy makes sense overall
though. I do have a few questions:

> +    capability setuid,
> +    capability setgid,

I'm assuming these are needed because qemu-bridge-helper drops

> +    capability setpcap,

Can you explain why this capability is needed by qemu-bridge-helper?

> +    network inet stream,

I understood why net_admin was needed, but this one is less clear. Why
does qemu-bridge-helper need this?

> +    /etc/qemu/** r,

I'm not familiar with this directory. What does qemu-bridge-helper need
from this directory?

> +    @{PROC}/*/status r,

Is it possible to use this instead:
owner @{PROC}/*/status r,


Jamie Strandboge             | http://www.canonical.com

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