[libvirt] [PATCH] LXC: don't set socket create selinux context in virLXCProcessConnectMonitor

[Michal Privoznik]

On 25.12.2013 08:02, Gao feng wrote:
> the unix socket /var/run/libvirt/lxc/domain.sock is not created
> under the selinux context which configured by <seclabel>.
> 
> If we try to connect the domain.sock under the selinux context
> of domain in virtLXCProcessConnectMonitor,selinux will deny
> this connect operation.
> 
> type=AVC msg=audit(1387953696.067:662): avc:  denied  { connectto } for  pid=21206 comm="libvirtd" path="/usr/local/var/run/libvirt/lxc/systemd.sock" scontext=unconfined_u:system_r:svirt_lxc_net_t:s0:c770,c848 tcontext=unconfined_u:system_r:unconfined_t:s0-s0:c0.c1023 tclass=unix_stream_socket
> 
> Since there is no harm to access doamin.sock outof domain's
> context, this patch removes the setsockcreatecon in
> virLXCProcessConnectMonitor.
> 
> Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
> ---
>  src/lxc/lxc_process.c | 12 ------------
>  1 file changed, 12 deletions(-)
> 
> diff --git a/src/lxc/lxc_process.c b/src/lxc/lxc_process.c
> index cc9c1a2..b336ade 100644
> --- a/src/lxc/lxc_process.c
> +++ b/src/lxc/lxc_process.c
> @@ -640,9 +640,6 @@ static virLXCMonitorPtr virLXCProcessConnectMonitor(virLXCDriverPtr driver,
>      virLXCMonitorPtr monitor = NULL;
>      virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
>  
> -    if (virSecurityManagerSetSocketLabel(driver->securityManager, vm->def) < 0)
> -        goto cleanup;
> -
>      /* Hold an extra reference because we can't allow 'vm' to be
>       * deleted while the monitor is active */
>      virObjectRef(vm);
> @@ -652,15 +649,6 @@ static virLXCMonitorPtr virLXCProcessConnectMonitor(virLXCDriverPtr driver,
>      if (monitor == NULL)
>          virObjectUnref(vm);
>  
> -    if (virSecurityManagerClearSocketLabel(driver->securityManager, vm->def) < 0) {
> -        if (monitor) {
> -            virObjectUnref(monitor);
> -            monitor = NULL;
> -        }
> -        goto cleanup;
> -    }
> -
> -cleanup:
>      virObjectUnref(cfg);
>      return monitor;
>  }
> 

This patch looks good, but just one question - shouldn't the monitor
socket be created with the correct selinux label instead? You know, the
other approach to fix this issue.

Michal