linux-kernel - Re: [PATCH 2/2] user namespace: usb: make usb urbs user namespace aware (v2)

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Message-ID: <20110927151859.GA2952@peqn>
Date:	Tue, 27 Sep 2011 10:18:59 -0500
From:	Serge Hallyn <serge.hallyn@...onical.com>
To:	Greg KH <greg@...ah.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Oleg Nesterov <oleg@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>, richard@....at,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Tejun Heo <tj@...nel.org>, linux-usb@...r.kernel.org
Subject: Re: [PATCH 2/2] user namespace: usb: make usb urbs user namespace
 aware (v2)

Quoting Greg KH (greg@...ah.com):
> On Tue, Sep 27, 2011 at 07:41:57AM -0500, Serge E. Hallyn wrote:
> > Quoting Greg KH (greg@...ah.com):
> > > On Mon, Sep 26, 2011 at 10:45:18AM -0500, Serge Hallyn wrote:
> > > > Add to the dev_state and alloc_async structures the user namespace
> > > > corresponding to the uid and euid.  Pass these to kill_pid_info_as_uid(),
> > > > which can then implement a proper, user-namespace-aware uid check.
> > > > 
> > > > Changelog:
> > > > Sep 20: Per Oleg's suggestion: Instead of caching and passing user namespace,
> > > > 	uid, and euid each separately, pass a struct cred.
> > > > Sep 26: Address Alan Stern's comments: don't define a struct cred at
> > > > 	usbdev_open(), and take and put a cred at async_completed() to
> > > > 	ensure it lasts for the duration of kill_pid_info_as_cred().
> > > > 
> > > > Signed-off-by: Serge Hallyn <serge.hallyn@...onical.com>
> > > > Cc: Greg KH <greg@...ah.com>
> > > 
> > > I have no objection to this, is it going to go through your tree, or
> > > somewhere else?
> > 
> > (Silly question from me, but just to make sure - were you asking this of
> > Alan?)
> 
> Nope, you.  Do you have a tree for this type of namespace work?  I
> haven't been paying attention to it at all.

No, at the moment I don't.

> If not, I'll gladly take it myself, I just don't want to cause any merge
> conflicts anywhere else if at all possible.

Great, thanks.

-serge
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