[libvirt] [PATCH] selinux: relabel tapfd in qemuPhysIfaceConnect

[Eric Blake]

On 10/18/2012 07:30 AM, Guannan Ren wrote:
> Relabeling tapfd right after the tap device is created.
> qemuPhysIfaceConnect is common function called both for static
> netdevs and for hotplug netdevs.
> ---
>  src/qemu/qemu_command.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 0c0c400..b24e9b1 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -170,6 +170,11 @@ qemuPhysIfaceConnect(virDomainDefPtr def,
>          vmop, driver->stateDir,
>          virDomainNetGetActualBandwidth(net));
>      if (rc >= 0) {
> +        if (virSecurityManagerSetTapFDLabel(driver->securityManager,
> +                                            def, rc) < 0) {
> +            VIR_FORCE_CLOSE(rc);
> +            return -1;
> +        }
>          virDomainAuditNetDevice(def, net, res_ifname, true);
>          VIR_FREE(net->ifname);

Looks like you leak net->ifname on error, not to mention that you are
skipping out on an audit point.  I think you need to fix up the logic
here to avoid leaks on failure to relabel the fd.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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