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GET /api/1.1/patches/2228491/?format=api
{ "id": 2228491, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228491/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/ee56c3e416452b2a40589a2a85245ac2ad5e9f4b.1777214801.git.lucien.xin@gmail.com/", "project": { "id": 26, "url": "http://patchwork.ozlabs.org/api/1.1/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 }, "msgid": "<ee56c3e416452b2a40589a2a85245ac2ad5e9f4b.1777214801.git.lucien.xin@gmail.com>", "date": "2026-04-26T14:46:40", "name": "[net,v2,1/2] netfilter: skip recording stale or retransmitted INIT", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": true, "hash": "0eb2264699201e2d907a422737610b296e2dec02", "submitter": { "id": 61073, "url": "http://patchwork.ozlabs.org/api/1.1/people/61073/?format=api", "name": "Xin Long", "email": "lucien.xin@gmail.com" }, "delegate": { "id": 11902, "url": "http://patchwork.ozlabs.org/api/1.1/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/ee56c3e416452b2a40589a2a85245ac2ad5e9f4b.1777214801.git.lucien.xin@gmail.com/mbox/", "series": [ { "id": 501540, "url": "http://patchwork.ozlabs.org/api/1.1/series/501540/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=501540", "date": "2026-04-26T14:46:39", "name": "sctp: fix a vtag verification failure caused by stale INITs", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/501540/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228491/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228491/checks/", "tags": {}, "headers": { "Return-Path": "\n <netfilter-devel+bounces-12200-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=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=drDRW9oD;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; 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It indicates either:\n\n- a stale INIT (after INIT-ACK has already been seen on the same side), or\n- a retransmitted INIT (after INIT has already been recorded on the same\n side).\n\nIn both cases, the INIT must not update ct->proto.sctp.init[] state, since\nit does not advance the handshake tracking and may otherwise corrupt\nINIT/INIT-ACK validation logic.\n\nAllow INIT processing only when the conntrack entry is newly created\n(SCTP_CONNTRACK_NONE), or when the init_tag differs from the stored peer\nvtag.\n\nNote it skips the check for the ct with old_state SCTP_CONNTRACK_NONE in\nnf_conntrack_sctp_packet(), as it is just created in sctp_new() where it\nset ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = ih->init_tag.\n\nFixes: 9fb9cbb1082d (\"[NETFILTER]: Add nf_conntrack subsystem.\")\nSigned-off-by: Xin Long <lucien.xin@gmail.com>\nReviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>\nAcked-by: Florian Westphal <fw@strlen.de>\n---\n net/netfilter/nf_conntrack_proto_sctp.c | 10 +++++++---\n 1 file changed, 7 insertions(+), 3 deletions(-)", "diff": "diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c\nindex 645d2c43ebf7..7e10fa65cbdd 100644\n--- a/net/netfilter/nf_conntrack_proto_sctp.c\n+++ b/net/netfilter/nf_conntrack_proto_sctp.c\n@@ -466,9 +466,13 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,\n \t\t\tif (!ih)\n \t\t\t\tgoto out_unlock;\n \n-\t\t\tif (ct->proto.sctp.init[dir] && ct->proto.sctp.init[!dir])\n-\t\t\t\tct->proto.sctp.init[!dir] = 0;\n-\t\t\tct->proto.sctp.init[dir] = 1;\n+\t\t\t/* Do not record INIT matching peer vtag (stale or retransmitted INIT). */\n+\t\t\tif (old_state == SCTP_CONNTRACK_NONE ||\n+\t\t\t ct->proto.sctp.vtag[!dir] != ih->init_tag) {\n+\t\t\t\tif (ct->proto.sctp.init[dir] && ct->proto.sctp.init[!dir])\n+\t\t\t\t\tct->proto.sctp.init[!dir] = 0;\n+\t\t\t\tct->proto.sctp.init[dir] = 1;\n+\t\t\t}\n \n \t\t\tpr_debug(\"Setting vtag %x for dir %d\\n\", ih->init_tag, !dir);\n \t\t\tct->proto.sctp.vtag[!dir] = ih->init_tag;\n", "prefixes": [ "net", "v2", "1/2" ] }