linux-kernel - Re: [PATCH v4.4/bluetooth 1/2] Bluetooth: Consolidate encryption handling in hci_encrypt

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Date:   Thu, 15 Oct 2020 21:15:48 +0000
From:   "Hans-Christian Egtvedt (hegtvedt)" <hegtvedt@...co.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Luiz Augusto von Dentz" <luiz.von.dentz@...el.com>,
        Marcel Holtmann <marcel@...tmann.org>
Subject: Re: [PATCH v4.4/bluetooth 1/2] Bluetooth: Consolidate encryption
 handling in hci_encrypt_cfm

On 15/10/2020 14:44, Hans-Christian Egtvedt (hegtvedt) wrote:
> On 15/10/2020 14:02, Greg KH wrote:
>> On Thu, Oct 15, 2020 at 11:18:39AM +0000, Hans-Christian Egtvedt (hegtvedt) wrote:
>>> On 15/10/2020 11:57, Greg KH wrote:
>>>> On Thu, Oct 15, 2020 at 09:43:32AM +0200, Hans-Christian Noren Egtvedt wrote:
>>>>> From: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>

<snipp embarrassing reference to local commit>

>>>>> ---
>>>>> AFAICT, fixing CVE 2020-10135 Bluetooth impersonation attacks have been
>>>>> left out for the 4.4 stable kernel. I cherry picked what I assume are
>>>>> the appropriate two patches missing from the 4.9 stable kernel. Please
>>>>> add them to upcoming 4.4 stable releases.
>>>>
>>>> Why are you merging 2 commits together?  Please provide backports for
>>>> all stable kernels, if you want to see this in the 4.4.y tree.  We can
>>>> not have someone move from an older tree to a newer one and have a
>>>> regression.
>>>
>>> Agreed, I have managed to trick myself into thinking the 4.4.y branch
>>> was left out, but I assume these patches are required for all LTS branches.
>>
>> They are, but if you have copies of them, please feel free to share
>> them.
> 
> I will repeat cherry-picking from a clean linux-stable git tree and send
> patches, sorry for this noise.
> 
> I see linux-5.8.y has partial patches, while the older branches need the
> full series of three commits. I just discovered an additional fix.

I sent three iterations.

5.8.y only requires a single cherry-pick.

4.9.y to 5.4.y has non-conflicting cherry-pick from upstream commits.

4.4.y needs to resolve a conflict when cherry-picking.

I would still want Luiz to ack that this completes the mitigation for
this Bluetooth vulnerability in the stable kernels.

-- 
Best regards, Hans-Christian Noren Egtvedt

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