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GET /api/patches/2223990/?format=api
{ "id": 2223990, "url": "http://patchwork.ozlabs.org/api/patches/2223990/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260416131453.308611-5-pablo@netfilter.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": "<20260416131453.308611-5-pablo@netfilter.org>", "list_archive_url": null, "date": "2026-04-16T13:14:46", "name": "[net,04/11] netfilter: nfnetlink_osf: fix null-ptr-deref in nf_osf_ttl", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "84887649eb91594a98305d9001e5aa6a1c00b0bf", "submitter": { "id": 1315, "url": "http://patchwork.ozlabs.org/api/people/1315/?format=api", "name": "Pablo Neira Ayuso", "email": "pablo@netfilter.org" }, "delegate": { "id": 11902, "url": "http://patchwork.ozlabs.org/api/users/11902/?format=api", "username": "strlen", "first_name": "Florian", "last_name": "Westphal", "email": "fw@strlen.de" }, "mbox": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260416131453.308611-5-pablo@netfilter.org/mbox/", "series": [ { "id": 500161, "url": "http://patchwork.ozlabs.org/api/series/500161/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=500161", "date": "2026-04-16T13:14:48", "name": "[net,01/11] netfilter: arp_tables: fix IEEE1394 ARP payload parsing in arp_packet_match()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500161/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223990/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223990/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <netfilter-devel+bounces-11972-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 unprotected) header.d=netfilter.org header.i=@netfilter.org\n header.a=rsa-sha256 header.s=2025 header.b=Nk0O2Psr;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; helo=tor.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-11972-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=netfilter.org header.i=@netfilter.org\n header.b=\"Nk0O2Psr\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=217.70.190.124", "smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=netfilter.org", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=netfilter.org" ], "Received": [ "from tor.lore.kernel.org (tor.lore.kernel.org\n [IPv6:2600:3c04:e001:36c::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fxJWq1NgWz1yG9\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 16 Apr 2026 23:19:35 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby tor.lore.kernel.org (Postfix) with ESMTP id C11A03171173\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 16 Apr 2026 13:15:38 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id A47EE3CCA15;\n\tThu, 16 Apr 2026 13:15:09 +0000 (UTC)", "from mail.netfilter.org (mail.netfilter.org [217.70.190.124])\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 C17A91F09A8;\n\tThu, 16 Apr 2026 13:15:07 +0000 (UTC)", "from localhost.localdomain (mail-agni [217.70.190.124])\n\tby mail.netfilter.org (Postfix) with ESMTPSA id 90C7C60177;\n\tThu, 16 Apr 2026 15:15:05 +0200 (CEST)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776345309; cv=none;\n b=OQLRxwOKwfYvNjPLFtNwhtAmEogD/uYom0GfjqkufMsc+0omtRnBOxtXZKVMoTV4gxoJuBJZf9YcCR4IW91gwqRO4hpsVdtMXu4Qv35/TI/jSM85yPUNlVftvchZljO8qhx7tYroLhYxFZBv4L/Jz0nIFoe8YyA9N3myeWQbcmA=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776345309; c=relaxed/simple;\n\tbh=la5PxyZ6zfqAlWe7ze7U2BoSo9vipP6VepoVDS9ueko=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=uCn6D9FUeYJ4iQhmVfMkA4JuIapY3PuuLej6MDRQ6XCBGIzV4uqj/MEHjkX/w1EBZhaA5Ixh5kDdqItgDzHCjdi0QwyKqTYWYJqsW0YlXM7vDj45JUitVn0yaQEx/pTBOz8LqN83zM7h5V5XdrY5wja7gLWbCMWGpR8gEgqgvug=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=netfilter.org;\n spf=pass smtp.mailfrom=netfilter.org;\n dkim=pass (2048-bit key) header.d=netfilter.org header.i=@netfilter.org\n header.b=Nk0O2Psr; arc=none smtp.client-ip=217.70.190.124", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=netfilter.org;\n\ts=2025; t=1776345306;\n\tbh=LeFaSGjPCTTf+pALMTZtcj2GKEbk7aP/xGJb/KuJWaQ=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Nk0O2PsrdVnySBCQMs4/YoTmCfv5PAFdPRdG6IZfu5OhgLzhEzuKwiBTjS1bZ9L/j\n\t G3DquQZWeB4VS6OUvHAonjI2/oDccMmKAh28yUaAeTnUDcpupeEWHctF1PK4yRrqeR\n\t 5BmU72n6wC3UMXKwxPqScBmiExAb4iYvNKKqzi13YDEQ1Rt2mHf6qRgAn3+8ve9Ean\n\t G9TS2lZxkMJLDqZwPJtmcRiFVbCvy5yl8L0syZKsmlcMU7JTYorIXHJruszIgw0hsC\n\t BP9pAEhQewVMLC+m8vD377OlAmSUteUEIQ9yxupixT7//8UcS7qIYxBI4dEY51Ea2K\n\t 2oH2nR8jLixyA==", "From": "Pablo Neira Ayuso <pablo@netfilter.org>", "To": "netfilter-devel@vger.kernel.org", "Cc": "davem@davemloft.net,\n\tnetdev@vger.kernel.org,\n\tkuba@kernel.org,\n\tpabeni@redhat.com,\n\tedumazet@google.com,\n\tfw@strlen.de,\n\thorms@kernel.org", "Subject": "[PATCH net 04/11] netfilter: nfnetlink_osf: fix null-ptr-deref in\n nf_osf_ttl", "Date": "Thu, 16 Apr 2026 15:14:46 +0200", "Message-ID": "<20260416131453.308611-5-pablo@netfilter.org>", "X-Mailer": "git-send-email 2.47.3", "In-Reply-To": "<20260416131453.308611-1-pablo@netfilter.org>", "References": "<20260416131453.308611-1-pablo@netfilter.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" }, "content": "From: \"Kito Xu (veritas501)\" <hxzene@gmail.com>\n\nnf_osf_ttl() calls __in_dev_get_rcu(skb->dev) and passes the result\nto in_dev_for_each_ifa_rcu() without checking for NULL. When the\nreceiving device has no IPv4 configuration (ip_ptr is NULL),\n__in_dev_get_rcu() returns NULL and in_dev_for_each_ifa_rcu()\ndereferences it unconditionally, causing a kernel crash.\n\nThis can happen when a packet arrives on a device that has had its\nIPv4 configuration removed (e.g., MTU set below IPV4_MIN_MTU causing\ninetdev_destroy) or on a device that was never assigned an IPv4\naddress, while an xt_osf or nft_osf rule with TTL_LESS mode is\nactive and the packet TTL exceeds the fingerprint TTL.\n\nAdd a NULL check for in_dev before using it. When in_dev is NULL,\nreturn 0 (no match) since source-address locality cannot be\ndetermined without IPv4 addresses on the device.\n\nKASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\nRIP: 0010:nf_osf_match_one+0x204/0xa70\nCall Trace:\n <IRQ>\n nf_osf_match+0x2f8/0x780\n xt_osf_match_packet+0x11c/0x1f0\n ipt_do_table+0x7fe/0x12b0\n nf_hook_slow+0xac/0x1e0\n ip_rcv+0x123/0x370\n __netif_receive_skb_one_core+0x166/0x1b0\n process_backlog+0x197/0x590\n __napi_poll+0xa1/0x540\n net_rx_action+0x401/0xd80\n handle_softirqs+0x19f/0x610\n </IRQ>\n\nFixes: a218dc82f0b5 (\"netfilter: nft_osf: Add ttl option support\")\nSuggested-by: Pablo Neira Ayuso <pablo@netfilter.org>\nSigned-off-by: Kito Xu (veritas501) <hxzene@gmail.com>\nReviewed-by: Fernando Fernandez Mancera <fmancera@suse.de>\nReviewed-by: Florian Westphal <fw@strlen.de>\nSigned-off-by: Pablo Neira Ayuso <pablo@netfilter.org>\n---\n net/netfilter/nfnetlink_osf.c | 3 +++\n 1 file changed, 3 insertions(+)", "diff": "diff --git a/net/netfilter/nfnetlink_osf.c b/net/netfilter/nfnetlink_osf.c\nindex 70172ca07858..4bbe64288b90 100644\n--- a/net/netfilter/nfnetlink_osf.c\n+++ b/net/netfilter/nfnetlink_osf.c\n@@ -36,6 +36,9 @@ static inline int nf_osf_ttl(const struct sk_buff *skb,\n \tconst struct in_ifaddr *ifa;\n \tint ret = 0;\n \n+\tif (!in_dev)\n+\t\treturn 0;\n+\n \tif (ttl_check == NF_OSF_TTL_TRUE)\n \t\treturn ip->ttl == f_ttl;\n \tif (ttl_check == NF_OSF_TTL_NOCHECK)\n", "prefixes": [ "net", "04/11" ] }