netdev - Re: [PATCH net] net: fix propagation of EPERM from tcp

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Message-ID: <20251121064333.3668e50e@kernel.org>
Date: Fri, 21 Nov 2025 06:43:33 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Maciej Żenczykowski <zenczykowski@...il.com>
Cc: Linux Network Development Mailing List <netdev@...r.kernel.org>, "David
 S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Lorenzo Colitti <lorenzo@...gle.com>, Neal
 Cardwell <ncardwell@...gle.com>, bpf@...r.kernel.org
Subject: Re: [PATCH net] net: fix propagation of EPERM from tcp_connect()

On Fri, 21 Nov 2025 11:05:39 +0900 Maciej Żenczykowski wrote:
> Perhaps I should have sent this as an RFC, as I haven't had the
> opportunity to test this fix in the full blown environment where we're
> running into problems.
> 
> I'm hoping to at least get feedback on whether this is acceptable
> and/or even the right approach -- or if someone has a better idea or
> if there's some fundamental reason we cannot return EPERM here.

FWIW this breaks the mptcp_join.sh test, too:

https://netdev-3.bots.linux.dev/vmksft-mptcp/results/394900/1-mptcp-join-sh/stdout