{"id":2224692,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2224692/?format=json","web_url":"http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260417183433.4739-1-fmancera@suse.de/","project":{"id":26,"url":"http://patchwork.ozlabs.org/api/1.1/projects/26/?format=json","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},"msgid":"<20260417183433.4739-1-fmancera@suse.de>","date":"2026-04-17T18:34:30","name":"[1/4,nf] netfilter: nft_exthdr: skip SCTP chunk evaluation for non-first fragments","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"7cafa877b3cf875b4f647923b2216479ca3ddf1c","submitter":{"id":90904,"url":"http://patchwork.ozlabs.org/api/1.1/people/90904/?format=json","name":"Fernando Fernandez Mancera","email":"fmancera@suse.de"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260417183433.4739-1-fmancera@suse.de/mbox/","series":[{"id":500386,"url":"http://patchwork.ozlabs.org/api/1.1/series/500386/?format=json","web_url":"http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=500386","date":"2026-04-17T18:34:31","name":"[1/4,nf] netfilter: nft_exthdr: skip SCTP chunk evaluation for non-first fragments","version":1,"mbox":"http://patchwork.ozlabs.org/series/500386/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2224692/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2224692/checks/","tags":{},"headers":{"Return-Path":"\n ","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 (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=YoG4bUjs;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=8iQNfNR8;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=1mY9xQE1;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=ZXnyoCTL;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; helo=sea.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-12004-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"YoG4bUjs\";\n\tdkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"8iQNfNR8\";\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"1mY9xQE1\";\n\tdkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"ZXnyoCTL\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=195.135.223.130","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=suse.de","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=suse.de","smtp-out1.suse.de;\n\tdkim=pass header.d=suse.de header.s=susede2_rsa header.b=1mY9xQE1;\n\tdkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=ZXnyoCTL"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fy3V33v4Xz1yCv\n\tfor ; Sat, 18 Apr 2026 04:35:39 +1000 (AEST)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id 4F25F3024A6B\n\tfor ; Fri, 17 Apr 2026 18:35:01 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 7A61335BDCA;\n\tFri, 17 Apr 2026 18:34:59 +0000 (UTC)","from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id B0E4F3264CE\n\tfor ; Fri, 17 Apr 2026 18:34:57 +0000 (UTC)","from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org\n [IPv6:2a07:de40:b281:104:10:150:64:97])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest\n SHA256)\n\t(No client certificate requested)\n\tby smtp-out1.suse.de (Postfix) with ESMTPS id AC1836A9E8;\n\tFri, 17 Apr 2026 18:34:54 +0000 (UTC)","from imap1.dmz-prg2.suse.org (localhost [127.0.0.1])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest\n SHA256)\n\t(No client certificate requested)\n\tby imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 4083B593AE;\n\tFri, 17 Apr 2026 18:34:54 +0000 (UTC)","from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167])\n\tby imap1.dmz-prg2.suse.org with ESMTPSA\n\tid qd3zDE594mmFFQAAD6G6ig\n\t(envelope-from ); Fri, 17 Apr 2026 18:34:54 +0000"],"ARC-Seal":"i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776450899; cv=none;\n b=JzfEvZihg8pl3FCxL3+KE82HHZaXLrPoQqLdPtyIaUrIzlqp6O3v5vPCECswE/v9EN1HbPpWS1WvIaEWcA7t+8+T239rOghy22uNj7iXBReaEeOJP8+oLNfvNor3rBgngLfM1HJcngIC/6zM6CddDKbU2tjQm83YQiM5ejxavvM=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776450899; c=relaxed/simple;\n\tbh=3raNyK+HitSIc8NPZf6Wg6VHIuW2luRiHcR3S5+8KY4=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=lDPcjbbCTvDGj0bjsv9YnYgtPSR3IA4SuPcQT7NEkum1qqkwbASi4DWd+hDA6VPhdlj71kFDshmVEAxlgwzZXZqS47Hu3i/ZzM+r3hi4a7WntsXxMI93/NZs+t084lDShYsGRDebrslJIPlJi35tdtaszF1XHqhFRQ4zFx2PDi8=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=suse.de;\n spf=pass smtp.mailfrom=suse.de;\n dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=YoG4bUjs;\n dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=8iQNfNR8;\n dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=1mY9xQE1;\n dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=ZXnyoCTL; arc=none smtp.client-ip=195.135.223.130","DKIM-Signature":["v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n\tt=1776450895;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=UrX/uUMR+k8sq29o+DdfIXyRnJnVrZizQl8wASbQ+6k=;\n\tb=YoG4bUjsvo68H18CelugOJUgbHTZW9vLIr8XvPFHknu8HTb9QI3Q9gUhSR42AGHUywbKSv\n\t1rGJ+0zsPQGQ0sk1Uaq4Ie8XVgS++d21ax+Rlc6k159G2HLtYFUhy9t5lsnEY9yHpAUFKn\n\tPvdG4Soj5omMu5qWik04RvEU6dFiv6E=","v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n\ts=susede2_ed25519; t=1776450895;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=UrX/uUMR+k8sq29o+DdfIXyRnJnVrZizQl8wASbQ+6k=;\n\tb=8iQNfNR8PTKB5Vo1zGhuTo5OQjmGS3BHWKsABjaa8npI284CZJTJeg8gLOWGHJCsCZUjt+\n\tjaqoKu7dcrTeehBQ==","v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n\tt=1776450894;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=UrX/uUMR+k8sq29o+DdfIXyRnJnVrZizQl8wASbQ+6k=;\n\tb=1mY9xQE1zold+Jxo6zRhvQA9X1+X8p5NwGfKdasWvByNdyJVYcLJCxpwlCwF7WpyomlN39\n\tnpkEmdplhhvq5o17pYCth71o33qIL7mWYTlg+dfAtXEo1gJpRuNgRv2xpcKXsQwpu6lyw3\n\t1QUtrs5277Ko8cpjhPgp+42BMkKLB1E=","v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n\ts=susede2_ed25519; t=1776450894;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=UrX/uUMR+k8sq29o+DdfIXyRnJnVrZizQl8wASbQ+6k=;\n\tb=ZXnyoCTLmeBZqkKUuOxZjOwwjIY4gF1I7vSlnEH6ZvyLIXPPyePA+c55b6xbAGsfMIClIl\n\tDSVf2mt9GtlQSPBg=="],"From":"Fernando Fernandez Mancera ","To":"netfilter-devel@vger.kernel.org","Cc":"netdev@vger.kernel.org,\n\tcoreteam@netfilter.org,\n\tpablo@netfilter.org,\n\tfw@strlen.de,\n\tphil@nwl.cc,\n\tFernando Fernandez Mancera ","Subject":"[PATCH 1/4 nf] netfilter: nft_exthdr: skip SCTP chunk evaluation for\n non-first fragments","Date":"Fri, 17 Apr 2026 20:34:30 +0200","Message-ID":"<20260417183433.4739-1-fmancera@suse.de>","X-Mailer":"git-send-email 2.51.0","Precedence":"bulk","X-Mailing-List":"netfilter-devel@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Spamd-Result":"default: False [-3.01 / 50.00];\n\tBAYES_HAM(-3.00)[99.99%];\n\tMID_CONTAINS_FROM(1.00)[];\n\tNEURAL_HAM_LONG(-1.00)[-1.000];\n\tR_MISSING_CHARSET(0.50)[];\n\tR_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n\tNEURAL_HAM_SHORT(-0.20)[-1.000];\n\tMIME_GOOD(-0.10)[text/plain];\n\tMX_GOOD(-0.01)[];\n\tARC_NA(0.00)[];\n\tDKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n\tTO_DN_SOME(0.00)[];\n\tMIME_TRACE(0.00)[0:+];\n\tFUZZY_RATELIMITED(0.00)[rspamd.com];\n\tURIBL_BLOCKED(0.00)[suse.de:mid,suse.de:dkim,suse.de:email,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns];\n\tRBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n\tRCVD_COUNT_TWO(0.00)[2];\n\tTO_MATCH_ENVRCPT_ALL(0.00)[];\n\tFROM_HAS_DN(0.00)[];\n\tRECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received];\n\tRCPT_COUNT_SEVEN(0.00)[7];\n\tFROM_EQ_ENVFROM(0.00)[];\n\tRCVD_VIA_SMTP_AUTH(0.00)[];\n\tRCVD_TLS_ALL(0.00)[];\n\tDKIM_TRACE(0.00)[suse.de:+];\n\tSPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n\tDBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:dkim,suse.de:email,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]","X-Rspamd-Action":"no action","X-Spam-Flag":"NO","X-Spam-Score":"-3.01","X-Spam-Level":"","X-Rspamd-Server":"rspamd1.dmz-prg2.suse.org","X-Rspamd-Queue-Id":"AC1836A9E8"},"content":"The SCTP chunk matching logic in nft_exthdr relies on SCTP common header\nbeing present at the transport header offset. For fragmented packets at\nIP level, only the first fragment would match this condition.\n\nThe nft_exthdr could be used in a PREROUTING chain with a priority lower\nthan -400. This would bypass defragmentation. In addition, it can be use\nin stateless environments so it should work on a environment where\ndefragmentation is not being performed at all.\n\nAdd a check for pkt->fragoff to ensure exthdr SCTP only evaluates\nunfragmented packets or the first fragment in the stream.\n\nFixes: 133dc203d77d (\"netfilter: nft_exthdr: Support SCTP chunks\")\nSigned-off-by: Fernando Fernandez Mancera \n---\n net/netfilter/nft_exthdr.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c\nindex 7eedf4e3ae9c..8eb708bb8cff 100644\n--- a/net/netfilter/nft_exthdr.c\n+++ b/net/netfilter/nft_exthdr.c\n@@ -376,7 +376,7 @@ static void nft_exthdr_sctp_eval(const struct nft_expr *expr,\n \tconst struct sctp_chunkhdr *sch;\n \tstruct sctp_chunkhdr _sch;\n \n-\tif (pkt->tprot != IPPROTO_SCTP)\n+\tif (pkt->tprot != IPPROTO_SCTP || pkt->fragoff)\n \t\tgoto err;\n \n \tdo {\n","prefixes":["1/4","nf"]}