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GET /api/patches/2218424/?format=api
{ "id": 2218424, "url": "http://patchwork.ozlabs.org/api/patches/2218424/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260401074509.1897527-7-dwmw2@infradead.org/", "project": { "id": 26, "url": "http://patchwork.ozlabs.org/api/projects/26/?format=api", "name": "Netfilter Development", "link_name": "netfilter-devel", "list_id": "netfilter-devel.vger.kernel.org", "list_email": "netfilter-devel@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260401074509.1897527-7-dwmw2@infradead.org>", "list_archive_url": null, "date": "2026-04-01T07:44:20", "name": "[6/6] net: Warn when processes listen on AF_INET sockets", "commit_ref": null, "pull_url": null, "state": "awaiting-upstream", "archived": false, "hash": "324413b050f572069d76842525639b63442c700d", "submitter": { "id": 26, "url": "http://patchwork.ozlabs.org/api/people/26/?format=api", "name": "David Woodhouse", "email": "dwmw2@infradead.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260401074509.1897527-7-dwmw2@infradead.org/mbox/", "series": [ { "id": 498288, "url": "http://patchwork.ozlabs.org/api/series/498288/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=498288", "date": "2026-04-01T07:44:20", "name": "Deprecate Legacy IP", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498288/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218424/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218424/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <netfilter-devel+bounces-11536-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "netfilter-devel@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=desiato.20200630 header.b=ICgU3kYI;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c09:e001:a7::12fc:5321; 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Wed, 1 Apr 2026 07:46:52 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 3450C39B955;\n\tWed, 1 Apr 2026 07:45:49 +0000 (UTC)", "from desiato.infradead.org (desiato.infradead.org [90.155.92.199])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id E702B35E936;\n\tWed, 1 Apr 2026 07:45:42 +0000 (UTC)", "from [2001:8b0:10b:1::425] (helo=i7.infradead.org)\n\tby desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux))\n\tid 1w7qGN-0000000HLQS-0BKX;\n\tWed, 01 Apr 2026 07:45:19 +0000", "from dwoodhou by i7.infradead.org with local (Exim 4.98.2 #2 (Red\n Hat Linux))\n\tid 1w7qGM-00000007xeP-3Bbt;\n\tWed, 01 Apr 2026 08:45:18 +0100" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775029547; cv=none;\n b=NQ++2YkEVUvJxdfNb8+aDqCgpjoJumppJXjSj4Wzg0jIPjs4STQMz/4knnWFwcAnpp+f1spxlVZmdisID6BKOsghdFhyJh1c6MpuVZnXUzeCOrgcdWzfR+bkYm0Vgh2EOG1vAtctQWu6PaJRs2IhhL9utEX/dzuBeHV35WWcv0Y=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775029547; c=relaxed/simple;\n\tbh=kApfysLmil/v0Oj2JmnKLBK0dorCkw228crfG1s8AD0=;\n\th=From:To:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=Xpes9io5/H/23AXuW3XYrkaIxb2kXso3Qv/alnLwHoAEtSUgbo8guJbFlAoQMYeV/fcc+vv3IwMdIMwr8rzMQYC54nzznCGJm85Zjy/9KwPZczQKWFvqNNGezIYE4yAkRnLIM7orkcH9CspWxkwwpOatgdUjyxrmS60zVneIe3Y=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=infradead.org;\n spf=none smtp.mailfrom=desiato.srs.infradead.org;\n dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org\n header.b=ICgU3kYI; arc=none smtp.client-ip=90.155.92.199", "DKIM-Signature": "v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding:\n\tMIME-Version:References:In-Reply-To:Message-ID:Date:Subject:To:From:Reply-To:\n\tCc:Content-Type:Content-ID:Content-Description;\n\tbh=TjlEaZufkIfdPkUMCDh5SD89kPYTqyaHCXw8Muwc4Dk=; b=ICgU3kYIYD7TcubUA2flzaCQ0/\n\tY1xq8IIwcHVpeuRBs2Sk5bzpKgsAJH4Ach8Tt1JHYt4wh0jYcY6e+SATwyK4RcZ/7221wQ27l1y2E\n\tO3cgTAk/OztH7NNk72E5Bf2RwSS34DSuaYUnyizucHQyG/+WmOWj1vdkACs6nq4qlMsZGSsEfWGNS\n\thXSAVX0fEOkaA99zZ9kqYN6yxmdUYCJQkEtOxNFaQ7BJhkHkfggNP9lw9mMGOfHK6IUONyvssH4Q0\n\t9gZpb8pHebi9BTlNi6Yopj0pLSCVCcKonmuA4rkAb/dLverJuSQ9UZS7Ic1Jul4M9LMCBmkEXo8vL\n\tC49g96Qw==;", "From": "David Woodhouse <dwmw2@infradead.org>", "To": "Saeed Mahameed <saeedm@nvidia.com>,\n\tLeon Romanovsky <leon@kernel.org>,\n\tTariq Toukan <tariqt@nvidia.com>,\n\tMark Bloch <mbloch@nvidia.com>,\n\tAndrew Lunn <andrew+netdev@lunn.ch>,\n\t\"David S. Miller\" <davem@davemloft.net>,\n\tEric Dumazet <edumazet@google.com>,\n\tJakub Kicinski <kuba@kernel.org>,\n\tPaolo Abeni <pabeni@redhat.com>,\n\tSimon Horman <horms@kernel.org>,\n\tNikolay Aleksandrov <razor@blackwall.org>,\n\tIdo Schimmel <idosch@nvidia.com>,\n\tMartin KaFai Lau <martin.lau@linux.dev>,\n\tDaniel Borkmann <daniel@iogearbox.net>,\n\tJohn Fastabend <john.fastabend@gmail.com>,\n\tStanislav Fomichev <sdf@fomichev.me>,\n\tAlexei Starovoitov <ast@kernel.org>,\n\tAndrii Nakryiko <andrii@kernel.org>,\n\tEduard Zingerman <eddyz87@gmail.com>,\n\tSong Liu <song@kernel.org>,\n\tYonghong Song <yonghong.song@linux.dev>,\n\tKP Singh <kpsingh@kernel.org>,\n\tHao Luo <haoluo@google.com>,\n\tJiri Olsa <jolsa@kernel.org>,\n\tKuniyuki Iwashima <kuniyu@google.com>,\n\tWillem de Bruijn <willemb@google.com>,\n\tDavid Ahern <dsahern@kernel.org>,\n\tNeal Cardwell <ncardwell@google.com>,\n\tJohannes Berg <johannes@sipsolutions.net>,\n\tPablo Neira Ayuso <pablo@netfilter.org>,\n\tFlorian Westphal <fw@strlen.de>,\n\tPhil Sutter <phil@nwl.cc>,\n\tGuillaume Nault <gnault@redhat.com>,\n\tDavid Woodhouse <dwmw@amazon.co.uk>,\n\tKees Cook <kees@kernel.org>,\n\tAlexei Lazar <alazar@nvidia.com>,\n\tGal Pressman <gal@nvidia.com>,\n\tPaul Moore <paul@paul-moore.com>,\n\tnetdev@vger.kernel.org,\n\tlinux-rdma@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\toss-drivers@corigine.com,\n\tbridge@lists.linux.dev,\n\tbpf@vger.kernel.org,\n\tlinux-wireless@vger.kernel.org,\n\tnetfilter-devel@vger.kernel.org,\n\tcoreteam@netfilter.org,\n\ttorvalds@linux-foundation.org,\n\tjon.maddog.hall@gmail.com", "Subject": "[PATCH 6/6] net: Warn when processes listen on AF_INET sockets", "Date": "Wed, 1 Apr 2026 08:44:20 +0100", "Message-ID": "<20260401074509.1897527-7-dwmw2@infradead.org>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260401074509.1897527-1-dwmw2@infradead.org>", "References": "<20260401074509.1897527-1-dwmw2@infradead.org>", "Precedence": "bulk", "X-Mailing-List": "netfilter-devel@vger.kernel.org", "List-Id": "<netfilter-devel.vger.kernel.org>", "List-Subscribe": "<mailto:netfilter-devel+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:netfilter-devel+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Sender": "David Woodhouse <dwmw2@infradead.org>", "X-SRS-Rewrite": "SMTP reverse-path rewritten from <dwmw2@infradead.org> by\n desiato.infradead.org. See http://www.infradead.org/rpr.html" }, "content": "From: David Woodhouse <dwmw@amazon.co.uk>\n\nThere is no need to listen on AF_INET sockets; a modern application can\nlisten on IPv6 (without IPV6_V6ONLY) and will accept connections from\nthe 20th century via IPv4-mapped addresses (::ffff:x.x.x.x) on the IPv6\nsocket.\n\nSigned-off-by: David Woodhouse <dwmw@amazon.co.uk>\n---\n net/ipv4/af_inet.c | 3 +++\n 1 file changed, 3 insertions(+)", "diff": "diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c\nindex dc358faa1647..3838782a8437 100644\n--- a/net/ipv4/af_inet.c\n+++ b/net/ipv4/af_inet.c\n@@ -240,6 +240,9 @@ int inet_listen(struct socket *sock, int backlog)\n \tstruct sock *sk = sock->sk;\n \tint err = -EINVAL;\n \n+\tpr_warn_once(\"process '%s' (pid %d) is listening on an AF_INET socket. Consider using AF_INET6 with IPV6_V6ONLY=0 instead.\\n\",\n+\t\t current->comm, task_pid_nr(current));\n+\n \tlock_sock(sk);\n \n \tif (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM)\n", "prefixes": [ "6/6" ] }