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([2a01:e0a:ab7:2110:6a1d:efff:fe52:1959]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4601f368e9fsm52404957f8f.37.2026.06.08.09.13.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Jun 2026 09:13:30 -0700 (PDT) Message-ID: <3e2536d5-317d-4d0b-b489-e77f5be9bdaf@6wind.com> Date: Mon, 8 Jun 2026 18:13:29 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Reply-To: nicolas.dichtel@6wind.com Subject: Re: [PATCH net] ip6_vti: set netns_immutable on the fallback device. To: Eric Dumazet , "David S . Miller" , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , netdev@vger.kernel.org, eric.dumazet@gmail.com, Noam Rathaus , Steffen Klassert References: <20260608155918.787644-1-edumazet@google.com> From: Nicolas Dichtel Content-Language: en-US Organization: 6WIND In-Reply-To: <20260608155918.787644-1-edumazet@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Le 08/06/2026 à 17:59, Eric Dumazet a écrit : > john1988 and Noam Rathaus reported that vti6_init_net() does not set the > netns_immutable flag on the per-netns fallback tunnel device (ip6_vti0). > > Other similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel) > correctly set this flag during their fallback device initialization to > prevent them from being moved to another network namespace. > > Fixes: 61220ab34948 ("vti6: Enable namespace changing") > Reported-by: Noam Rathaus > Signed-off-by: Eric Dumazet > Cc: Nicolas Dichtel > Cc: Steffen Klassert Reviewed-by: Nicolas Dichtel