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Miller" , Jakub Kicinski , Paolo Abeni , Simon Horman , Nikolay Aleksandrov , Ido Schimmel , Martin KaFai Lau , Daniel Borkmann , John Fastabend , Stanislav Fomichev , Alexei Starovoitov , Andrii Nakryiko , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Kuniyuki Iwashima , Willem de Bruijn , David Ahern , Neal Cardwell , Johannes Berg , Pablo Neira Ayuso , Florian Westphal , Phil Sutter , Guillaume Nault , Kees Cook , Alexei Lazar , Gal Pressman , Paul Moore , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, oss-drivers@corigine.com, bridge@lists.linux.dev, bpf@vger.kernel.org, linux-wireless@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, torvalds@linux-foundation.org Subject: Re: [PATCH 6/6] net: Warn when processes listen on AF_INET sockets Message-ID: <20260401080657.70cd9bd1@phoenix.local> In-Reply-To: <252823d75e9221647e7f8ccef6105432aabe8d6f.camel@infradead.org> References: <20260401074509.1897527-1-dwmw2@infradead.org> <20260401074509.1897527-7-dwmw2@infradead.org> <252823d75e9221647e7f8ccef6105432aabe8d6f.camel@infradead.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 01 Apr 2026 10:28:23 +0100 David Woodhouse wrote: > > Some kernels are built without CONFIG_IPV6, so this warning would be > > quite misleading. > > Maybe on this date next year, we could make it not possible to build > the kernel *without* IPv6... ? There are some government agencies that used to require that IPV6 was disabled for security reasons. Yes they had broken old firewalls