linux-kernel - Re: [PATCH 3.13 131/160] Bluetooth: Fix redundant encryption request for reauthentication

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Date:	Wed, 11 Jun 2014 13:50:08 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	Johan Hedberg <johan.hedberg@...el.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com, Marcel Holtmann <marcel@...tmann.org>
Subject: Re: [PATCH 3.13 131/160] Bluetooth: Fix redundant encryption
 request for reauthentication

On Wed, 2014-06-11 at 07:55 +0300, Johan Hedberg wrote:
> Hi,
> 
> On Tue, Jun 10, 2014, Kamal Mostafa wrote:
> > 3.13.11.3 -stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Johan Hedberg <johan.hedberg@...el.com>
> > 
> > commit 09da1f3463eb81d59685df723b1c5950b7570340 upstream.
> > 
> > When we're performing reauthentication (in order to elevate the
> > security level from an unauthenticated key to an authenticated one) we
> > do not need to issue any encryption command once authentication
> > completes. Since the trigger for the encryption HCI command is the
> > ENCRYPT_PEND flag this flag should not be set in this scenario.
> > Instead, the REAUTH_PEND flag takes care of all necessary steps for
> > reauthentication.
> > 
> > Signed-off-by: Johan Hedberg <johan.hedberg@...el.com>
> > Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
> > Signed-off-by: Kamal Mostafa <kamal@...onical.com>
> > ---
> >  net/bluetooth/hci_conn.c | 9 ++++++---
> >  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> This one has a regression reported against it:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=77541
> 
> The report also has a working fix for the issue which we'll be sending
> to the stable trees (it's already in the Bluetooth subsystem tree). So
> I'm not sure what the right way to proceed here: ignore this patch until
> the other patch is available, apply this one and wait for the other one,
> or just forget about both patches for the stable trees.
> 
> Johan
> 

Thanks very much for the heads-up, Johan!

I've dropped this patch from the upcoming 3.13.11.3 release.  Please let
me know when the fix-fix lands in mainline so that I can pick them both
up together.

 -Kamal


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