From: Sabrina Dubroca <sd@queasysnail.net>
To: Jakub Kicinski <kuba@kernel.org>
Cc: Antonio Quartulli <antonio@openvpn.net>,
netdev@vger.kernel.org, Ralf Lici <ralf@mandelbit.com>,
Paolo Abeni <pabeni@redhat.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Hyunwoo Kim <imv4bel@gmail.com>
Subject: Re: [PATCH net 1/1] ovpn: fix race between deleting interface and adding new peer
Date: Fri, 24 Apr 2026 00:27:10 +0200 [thread overview]
Message-ID: <aeqcvgufY0F50rkU@krikkit> (raw)
In-Reply-To: <20260423103628.4ce6fc05@kernel.org>
2026-04-23, 10:36:28 -0700, Jakub Kicinski wrote:
> On Thu, 23 Apr 2026 18:37:49 +0200 Sabrina Dubroca wrote:
> > We could also wrap all of ovpn_peer_add (including the new reg_state
> > check) in netdev_lock, since we can't move to NETREG_UNREGISTERING
> > until netdev_lock is released (then I think we wouldn't need the
> > READ_ONCE(reg_state)). But I don't know if that's an acceptable use of
> > netdev_lock.
>
> Yup, fwiw it's a perfectly legitimate use case.
Ok. There's still a worrying bit in nesting lock_sock under
netdev_lock (ovpn_peer_add -> netdev_lock -> ovpn_peer_add_p2p ->
unlock_ovpn -> ovpn_socket_release -> lock_sock).
--
Sabrina
next prev parent reply other threads:[~2026-04-23 22:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 12:32 [PATCH net 0/1] pull request: fixes for ovpn 2026-04-22 Antonio Quartulli
2026-04-22 12:32 ` [PATCH net 1/1] ovpn: fix race between deleting interface and adding new peer Antonio Quartulli
2026-04-23 2:20 ` Jakub Kicinski
2026-04-23 12:16 ` Antonio Quartulli
2026-04-23 13:43 ` Antonio Quartulli
2026-04-23 16:37 ` Sabrina Dubroca
2026-04-23 17:36 ` Jakub Kicinski
2026-04-23 22:27 ` Sabrina Dubroca [this message]
2026-04-27 20:22 ` Jakub Kicinski
2026-04-23 17:38 ` Jakub Kicinski
-- strict thread matches above, loose matches on Subject: below --
2026-03-20 10:03 [PATCH net 0/1] pull request: fixes for ovpn 2026-03-20 Antonio Quartulli
2026-03-20 10:03 ` [PATCH net 1/1] ovpn: fix race between deleting interface and adding new peer Antonio Quartulli
2026-03-24 1:43 ` Jakub Kicinski
2026-03-24 1:45 ` Jakub Kicinski
2026-03-24 10:09 ` Sabrina Dubroca
2026-03-24 21:30 ` Jakub Kicinski
2026-03-24 22:40 ` Sabrina Dubroca
2026-03-25 13:37 ` Antonio Quartulli
2026-03-26 9:13 ` Sabrina Dubroca
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