netdev - Re: [PATCH 6.1 000/162] 6.1.57-rc1 review

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Date: Tue, 10 Oct 2023 18:51:15 +0200
From: Matthieu Baerts <matttbe@...nel.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev,
 linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
 akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org,
 patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de,
 jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com,
 srw@...dewatkins.net, rwarsow@....de, conor@...nel.org,
 "David S. Miller" <davem@...emloft.net>, David Ahern <dsahern@...nel.org>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Netdev <netdev@...r.kernel.org>,
 bpf <bpf@...r.kernel.org>, MPTCP Upstream <mptcp@...ts.linux.dev>
Subject: Re: [PATCH 6.1 000/162] 6.1.57-rc1 review

Hi Naresh,

On 09/10/2023 22:43, Naresh Kamboju wrote:
> On Mon, 9 Oct 2023 at 18:46, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
>>
>> This is the start of the stable review cycle for the 6.1.57 release.
>> There are 162 patches in this series, all will be posted as a response
>> to this one.  If anyone has any issues with these being applied, please
>> let me know.
>>
>> Responses should be made by Wed, 11 Oct 2023 13:00:55 +0000.
>> Anything received after that time might be too late.
>>
>> The whole patch series can be found in one patch at:
>>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.57-rc1.gz
>> or in the git tree and branch at:
>>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
>> and the diffstat can be found below.
>>
>> thanks,
>>
>> greg k-h
> 
> 
> The following kernel warnings were noticed several times on arm x15 devices
> running stable-rc 6.1.57-rc1 while running  selftests: net: mptcp_connect.sh
> and netfilter: nft_fib.sh.
> 
> The possible unsafe locking scenario detected.
> 
> FYI,
> Stable-rc/ linux.6.1.y kernel running stable/ linux.6.5.y selftest in this case.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> 
> kselftest: Running tests in net/mptcp

Thank you for having reported the issue and having added MPTCP ML in Cc!

Just to avoid confusions: the "WARNING" you shared when running
'mptcp_connect.sh' selftest appeared before creating the first MPTCP
connection. It looks like there is no reference to MPTCP in the
calltraces. Also, because you have the same issue with nft_fib.sh, I
would say that this issue is not linked to MPTCP but rather to a recent
modification in the IPv6 stack.

By chance, did you start a "git bisect" to identify the commit causing
this issue?

Cheers,
Matt
-- 
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