Date: Sat, 3 Jan 2009 13:49:21 -0500
To: David Howells <dhowells@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, jmorris@namei.org,
       linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] CRED: Fix regression in cap_capable() as shown up by
	sys_faccessat() [ver #2]
Message-ID: <20090103184921.GB20166@fieldses.org>
References: <20090102051905.GC1073@fieldses.org> <20090101235332.GA31840@fieldses.org> <24959.1230694093@redhat.com> <20081230134248.GA30124@lst.de> <21275.1230736542@redhat.com> <29449.1230859152@redhat.com> <32481.1230897578@redhat.com> <20090102164505.GA10465@fieldses.org>
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From: "J. Bruce Fields" <bfields@fieldses.org>
Sender: linux-kernel-owner@vger.kernel.org
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On Fri, Jan 02, 2009 at 11:45:05AM -0500, bfields wrote:
> On Fri, Jan 02, 2009 at 11:59:38AM +0000, David Howells wrote:
> > J. Bruce Fields <bfields@fieldses.org> wrote:
> > 
> > > No.  I started bisecting, and it does appear to be a regression from the
> > > cred patches, but at some point in the middle there it hangs on boot (a
> > > softlockup report blames a spinlock in set_groups).
> > 
> > Do you remember which patch you were at?

More precisely:
	- The last working commit is b6dff3ec... "CRED: Separate task
	  security context from task_struct".
	- The first commit exhibiting the permissions problem is
	  a6f76f2... "CRED: Make execve() take advantage of
	  copy-on-write credentials".
	- The 9 commits in between (from f1752eec to d84f4f9) result in
	  a soft lookup on boot.

--b.
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