linux-kernel - Re: [PATCH 5.16 138/200] mptcp: keep track of local endpoint still available for each msk

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Date:   Tue, 1 Feb 2022 14:23:55 -0800 (PST)
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>,
        Matthieu Baerts <matthieu.baerts@...sares.net>
Subject: Re: [PATCH 5.16 138/200] mptcp: keep track of local endpoint still
 available for each msk

On Tue, 1 Feb 2022, Greg Kroah-Hartman wrote:

> On Tue, Feb 01, 2022 at 03:30:02PM +0100, Greg Kroah-Hartman wrote:
>> On Mon, Jan 31, 2022 at 11:36:32AM -0800, Mat Martineau wrote:
>>> On Mon, 31 Jan 2022, Greg Kroah-Hartman wrote:
>>>
>>>> From: Paolo Abeni <pabeni@...hat.com>
>>>>
>>>> [ Upstream commit 86e39e04482b0aadf3ee3ed5fcf2d63816559d36 ]
>>>
>>> Hi Greg -
>>>
>>> Please drop this from the stable queue for both 5.16 and 5.15. It wasn't
>>> intended for backporting and we haven't checked for dependencies with other
>>> changes in this part of MPTCP subsystem.
>>>
>>> In the mptcp tree we make sure to add Fixes: tags on every patch we think is
>>> eligible for the -stable tree. I know you're sifting through a lot of
>>> patches from subsystems that end up with important fixes arriving from the
>>> "-next" branches, and it seems like the scripts scooped up several MPTCP
>>> patches this time around that don't meet the -stable rules.
>>
>> I think these were needed due to 8e9eacad7ec7 ("mptcp: fix msk traversal
>> in mptcp_nl_cmd_set_flags()") which you did tag with a "Fixes:" tag,
>> right?  Without these other commits, that one does not apply and it
>> looks like it should go into 5.15.y and 5.16.y.
>>

Ok, I see what happened there (there's a new variable present in 5.17 
that's not relevant for the earlier kernels). 8e9eacad7ec7 needs manual 
backporting, I'll work on that and send to the stable list.

>> Note, just putting a "Fixes:" tag does not guarantee if a commit will 
>> go into a stable tree.  Please use the correct 
>> "Cc:stable@...r.kernel.org" tag as the documentation asks for.
>>

I will make sure to use the Cc:stable@...r.kernel.org tag in the future.


>> I'll go drop all of these mptcp patches, including 8e9eacad7ec7 ("mptcp:
>> fix msk traversal in mptcp_nl_cmd_set_flags()") for now.  If you want
>> them added back in, please let us know.
>
> To be specific, I have dropped the following commits from the queues
> now, which was more than just these three that you asked:
>
> 602837e8479d ("mptcp: allow changing the "backup" bit by endpoint id")
> 59060a47ca50 ("mptcp: clean up harmless false expressions")
> 86e39e04482b ("mptcp: keep track of local endpoint still available for each msk")
> 8e9eacad7ec7 ("mptcp: fix msk traversal in mptcp_nl_cmd_set_flags()")
> a4c0214fbee9 ("mptcp: fix removing ids bitmap setting")
> 9846921dba49 ("selftests: mptcp: fix ipv6 routing setup")
>
> If you want them back, please let us know.
>

Of the above, there's only one suitable for stable as-is:

9846921dba49 ("selftests: mptcp: fix ipv6 routing setup")

Please add that one to the 5.16 and 5.15 queues.


Thanks!


--
Mat Martineau
Intel