netdev - Re: [PATCH] cgroup: fix memory leak caused by missing cgroup_bpf

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Message-ID: <20211012093255.GA14510@blackbody.suse.cz>
Date:   Tue, 12 Oct 2021 11:32:55 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     Quanyang Wang <quanyang.wang@...driver.com>
Cc:     Roman Gushchin <guro@...com>, Tejun Heo <tj@...nel.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Jens Axboe <axboe@...nel.dk>, Ming Lei <ming.lei@...hat.com>,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH] cgroup: fix memory leak caused by missing
 cgroup_bpf_offline

On Tue, Oct 12, 2021 at 02:22:13PM +0800, Quanyang Wang <quanyang.wang@...driver.com> wrote:
> Before this commit, percpu_ref is embedded in cgroup, it can be freed along
> with cgroup, so there is no memory leak. Since this commit, it causes the
> memory leak.
> Should I change it to "Fixes: 4bfc0bb2c60e ("bpf: decouple the lifetime of
> cgroup_bpf from cgroup itself")"?

I see. The leak is a product so I'd tag both of them and explain it in
the commit message.

Thank you,
Michal