netdev - Re: bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode [backport]

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Message-ID: <8dbbb2e5-0e18-8749-550b-14539bc30a5d@iogearbox.net>
Date:   Tue, 2 Nov 2021 14:05:46 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Ivan Babrou <ivan@...udflare.com>
Cc:     kernel-team <kernel-team@...udflare.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Stanislav Fomichev <sdf@...gle.com>, Tejun Heo <tj@...nel.org>,
        gregkh@...uxfoundation.org
Subject: Re: bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode
 [backport]

On 10/29/21 11:50 PM, Ivan Babrou wrote:
> Hello,
> 
> We have re-discovered the issue fixed by the following commit in v5.15:
> 
> * https://github.com/torvalds/linux/commit/8520e224f54
> 
> Is it possible to also backport the fix to 5.10 series, where the
> issue is also present?

No objections from my side, relevant commit SHAs aside from selftests should be:

  - 8520e224f547cd070c7c8f97b1fc6d58cff7ccaa
  - 78cc316e9583067884eb8bd154301dc1e9ee945c
  - 435b08ec0094ac1e128afe6cfd0d9311a8c617a7

If you have a chance, could you craft & submit a backport for stable?

Thanks Ivan!