[lxc-devel] [PATCH] proc:mixed make /proc/sys/net writable

[Stéphane Graber]

On Tue, Feb 03, 2015 at 05:57:59PM +0000, Serge Hallyn wrote:
> Quoting Stéphane Graber (stgraber at ubuntu.com):
> > Signed-off-by: Stéphane Graber <stgraber at ubuntu.com>
> 
> Is that safe now?  I thought there were still some items not properly
> namespaced?

I believe it is, yes. Unsafe items are usually not even shown at all in
there nowadays.

This also matches what we're doing with apparmor.

> 
> > ---
> >  src/lxc/conf.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/src/lxc/conf.c b/src/lxc/conf.c
> > index d711cda..2868708 100644
> > --- a/src/lxc/conf.c
> > +++ b/src/lxc/conf.c
> > @@ -752,8 +752,10 @@ static int lxc_mount_auto_mounts(struct lxc_conf *conf, int flags, struct lxc_ha
> >  		 * 2.6.32...
> >  		 */
> >  		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, "proc",                                              "%r/proc",                      "proc",     MS_NODEV|MS_NOEXEC|MS_NOSUID,   NULL },
> > +		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, "%r/proc/sys/net",                                   "%r/proc/net",                  NULL,       MS_BIND,                        NULL },
> >  		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, "%r/proc/sys",                                       "%r/proc/sys",                  NULL,       MS_BIND,                        NULL },
> >  		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, NULL,                                                "%r/proc/sys",                  NULL,       MS_REMOUNT|MS_BIND|MS_RDONLY,   NULL },
> > +		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, "%r/proc/net",                                       "%r/proc/sys/net",              NULL,       MS_MOVE,                        NULL },
> >  		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, "%r/proc/sysrq-trigger",                             "%r/proc/sysrq-trigger",        NULL,       MS_BIND,                        NULL },
> >  		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_MIXED, NULL,                                                "%r/proc/sysrq-trigger",        NULL,       MS_REMOUNT|MS_BIND|MS_RDONLY,   NULL },
> >  		{ LXC_AUTO_PROC_MASK, LXC_AUTO_PROC_RW,    "proc",                                              "%r/proc",                      "proc",     MS_NODEV|MS_NOEXEC|MS_NOSUID,   NULL },
> > -- 
> > 1.9.1
> > 
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-- 
Stéphane Graber
Ubuntu developer
http://www.ubuntu.com
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