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Re: [Qemu-devel] [PATCH RFC v3 17/27] COLO: Add new command parameter 'c
From: |
Daniel P. Berrange |
Subject: |
Re: [Qemu-devel] [PATCH RFC v3 17/27] COLO: Add new command parameter 'colo_nicname' 'colo_script' for net |
Date: |
Tue, 24 Feb 2015 17:24:10 +0000 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Tue, Feb 24, 2015 at 09:30:56AM -0700, Eric Blake wrote:
> On 02/24/2015 02:50 AM, Wen Congyang wrote:
> >> Script files are in general very hard to secure. Libvirt marks any
> >> domain that uses a script file for controlling networking as tainted,
> >> because it cannot guarantee that the script did not do arbitrary
> >> actions. Can you come up with any better solution that does not require
> >> a script file, such as having management software responsible for
> >> passing in an already-opened fd?
> >
> > Do you mean that opening the script in libvirt?
> >
>
> No, I mean a solution that needs no script file at all. Have libvirt
> pre-open the TAP device you will need, then pass in the fd that will be
> used for the colo NIC.
Agreed, we really must not add new features that require executing
arbitrary blackbox shell scripts to QEMU, when we know that reslts in
a flawed security model. And just pushing the script execution upto
libvirt is not really a satisfactory solution either.
Regards,
Daniel
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- [Qemu-devel] [PATCH RFC v3 09/27] QEMUSizedBuffer: Introduce two help functions for qsb, (continued)
- [Qemu-devel] [PATCH RFC v3 09/27] QEMUSizedBuffer: Introduce two help functions for qsb, zhanghailiang, 2015/02/11
- [Qemu-devel] [PATCH RFC v3 12/27] COLO VMstate: Load VM state into qsb before restore it, zhanghailiang, 2015/02/11
- [Qemu-devel] [PATCH RFC v3 10/27] COLO: Save VM state to slave when do checkpoint, zhanghailiang, 2015/02/11
- [Qemu-devel] [PATCH RFC v3 13/27] COLO RAM: Flush cached RAM into SVM's memory, zhanghailiang, 2015/02/11
- [Qemu-devel] [PATCH RFC v3 16/27] COLO failover: Don't do failover during loading VM's state, zhanghailiang, 2015/02/11
- [Qemu-devel] [PATCH RFC v3 15/27] COLO failover: Implement COLO master/slave failover work, zhanghailiang, 2015/02/11
- [Qemu-devel] [PATCH RFC v3 17/27] COLO: Add new command parameter 'colo_nicname' 'colo_script' for net, zhanghailiang, 2015/02/11
- Re: [Qemu-devel] [PATCH RFC v3 17/27] COLO: Add new command parameter 'colo_nicname' 'colo_script' for net, zhanghailiang, 2015/02/25
[Qemu-devel] [PATCH RFC v3 18/27] COLO NIC: Init/remove colo nic devices when add/cleanup tap devices, zhanghailiang, 2015/02/11
[Qemu-devel] [PATCH RFC v3 21/27] COLO NIC: Some init work related with proxy module, zhanghailiang, 2015/02/11
[Qemu-devel] [PATCH RFC v3 19/27] COLO NIC: Implement colo nic device interface configure(), zhanghailiang, 2015/02/11