linux-kernel - Re: [patch 00/13] devtmpfs patches

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Date:	Wed, 13 May 2009 14:58:18 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Stephen Smalley <sds@...ho.nsa.gov>
Cc:	"David P. Quigley" <dpquigl@...ho.nsa.gov>,
	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org,
	Greg KH <gregkh@...e.de>, Jan Blunck <jblunck@...e.de>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>,
	David Howells <dhowells@...hat.com>
Subject: Re: [patch 00/13] devtmpfs patches

On Wed, May 13, 2009 at 14:22, Stephen Smalley <sds@...ho.nsa.gov> wrote:

> I think you'll actually need to switch credentials around the entire
> sequence starting from vfs_path_lookup() and going through the
> vfs_mknod() call in order to avoid any denials from vfs_path_lookup,
> vfs_mkdir (via create_path), and vfs_mknod.
>
> Then the same issue applies to devtmpfs_delete_node() to prevent unlink
> denials against the current process when a node is removed, similarly
> wrapping everything from the vfs_path_lookup() through the final
> delete_path() call.

Ok, good, will do that. Anything like this to keep in mind when
creating/removing simple subdirectories?

Thanks,
Kay
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