linux-kernel - Re: [ 09/76] lockd: use rpc clients cl

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Message-ID: <20121019221301.GD13292@decadent.org.uk>
Date:	Fri, 19 Oct 2012 23:13:01 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Stanislav Kinsbursky <skinsbursky@...allels.com>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	alan@...rguk.ukuu.org.uk
Subject: Re: [ 09/76] lockd: use rpc clients cl_nodename for id encoding

On Fri, Oct 19, 2012 at 11:10:30PM +0100, Ben Hutchings wrote:
> On Thu, Oct 18, 2012 at 07:46:33PM -0700, Greg Kroah-Hartman wrote:
> > 3.6-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Stanislav Kinsbursky <skinsbursky@...allels.com>
> > 
> > commit 303a7ce92064c285a04c870f2dc0192fdb2968cb upstream.
> > 
> > Taking hostname from uts namespace if not safe, because this cuold be
> > performind during umount operation on child reaper death. And in this case
> > current->nsproxy is NULL already.
[...]
> >  struct nsm_res {
> > @@ -141,6 +142,7 @@ static int nsm_mon_unmon(struct nsm_hand
> >  		.vers		= 3,
> >  		.proc		= NLMPROC_NSM_NOTIFY,
> >  		.mon_name	= nsm->sm_mon_name,
> > +		.nodename	= utsname()->nodename,
> 
> Can we be sure that this string pointer will remain valid at the point
> where current->nsproxy has become NULL?  Or should nsm_args::nodename
> actually be a copy of the string?
[...]

Never mind, the following patch seems to deal with that.

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus
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