linux-kernel - Re: [PATCH bpf-next v7 1/3] bpf, sockmap: Fix incorrect copied

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Message-ID: <87wm1bti6m.fsf@cloudflare.com>
Date: Wed, 21 Jan 2026 10:43:13 +0100
From: Jakub Sitnicki <jakub@...udflare.com>
To: John Fastabend <john.fastabend@...il.com>
Cc: Jiayuan Chen <jiayuan.chen@...ux.dev>,  bpf@...r.kernel.org,  "David S.
 Miller" <davem@...emloft.net>,  Eric Dumazet <edumazet@...gle.com>,  Jakub
 Kicinski <kuba@...nel.org>,  Paolo Abeni <pabeni@...hat.com>,  Simon
 Horman <horms@...nel.org>,  Neal Cardwell <ncardwell@...gle.com>,
  Kuniyuki Iwashima <kuniyu@...gle.com>,  David Ahern <dsahern@...nel.org>,
  Alexei Starovoitov <ast@...nel.org>,  Daniel Borkmann
 <daniel@...earbox.net>,  Andrii Nakryiko <andrii@...nel.org>,  Martin
 KaFai Lau <martin.lau@...ux.dev>,  Eduard Zingerman <eddyz87@...il.com>,
  Song Liu <song@...nel.org>,  Yonghong Song <yonghong.song@...ux.dev>,  KP
 Singh <kpsingh@...nel.org>,  Stanislav Fomichev <sdf@...ichev.me>,  Hao
 Luo <haoluo@...gle.com>,  Jiri Olsa <jolsa@...nel.org>,  Shuah Khan
 <shuah@...nel.org>,  Michal Luczaj <mhal@...x.co>,  Cong Wang
 <cong.wang@...edance.com>,  netdev@...r.kernel.org,
  linux-kernel@...r.kernel.org,  linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf-next v7 1/3] bpf, sockmap: Fix incorrect copied_seq
 calculation

On Tue, Jan 20, 2026 at 07:38 AM -08, John Fastabend wrote:
> We could probably push this without the 2/3 patch? If we are debating
> that patch still would be good to get this merged.

Definitely. But also see my email from today [1]. I think I figured a
way how we can make leave FIONREAD in a better shape that it is today -
with what Jiayuan proposed - and improve it in the future.

[1] https://msgid.link/871pjjux2u.fsf@cloudflare.com