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From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: Kuniyuki Iwashima <kuniyu@google.com>,
	 Eric Dumazet <edumazet@google.com>
Cc: "David S . Miller" <davem@davemloft.net>,
	 Jakub Kicinski <kuba@kernel.org>,
	 Paolo Abeni <pabeni@redhat.com>,
	 Simon Horman <horms@kernel.org>,
	 Andrew Lunn <andrew+netdev@lunn.ch>,
	 netdev@vger.kernel.org,  eric.dumazet@gmail.com
Subject: Re: [PATCH net-next] tun: no longer rely on RTNL in tun_fill_info()
Date: Fri, 03 Jul 2026 11:43:26 -0400	[thread overview]
Message-ID: <willemdebruijn.kernel.1376ffaa117c4@gmail.com> (raw)
In-Reply-To: <CAAVpQUC1UKqqUdQaP+ud_uGkhByxooMvCs1H7i7q=OzQFP7trA@mail.gmail.com>

Kuniyuki Iwashima wrote:
> On Wed, Jul 1, 2026 at 5:51 AM Eric Dumazet <edumazet@google.com> wrote:
> >
> > Update tun_fill_info() to read device configuration fields (flags, owner,
> > group, numqueues, numdisabled) locklessly using READ_ONCE().
> >
> > Annotate all writes to these fields in the control paths with WRITE_ONCE()
> > to prevent data races, as these fields can be modified concurrently via
> > ioctls (TUNSETPERSIST, TUNSETOWNER, TUNSETGROUP, TUNSETIFF) or queue
> > attaching/detaching.
> >
> > Signed-off-by: Eric Dumazet <edumazet@google.com>
> 
> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>

Reviewed-by: Willem de Bruijn <willemb@google.com>

      reply	other threads:[~2026-07-03 15:43 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-01 12:51 [PATCH net-next] tun: no longer rely on RTNL in tun_fill_info() Eric Dumazet
2026-07-02  3:09 ` Kuniyuki Iwashima
2026-07-03 15:43   ` Willem de Bruijn [this message]

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