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GET /api/1.1/patches/2228493/?format=api
{ "id": 2228493, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228493/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/5788c76c1ee122a3ed00189e88dcf9df1fba226c.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": "<5788c76c1ee122a3ed00189e88dcf9df1fba226c.1777214801.git.lucien.xin@gmail.com>", "date": "2026-04-26T14:46:41", "name": "[net,v2,2/2] sctp: discard stale INIT after handshake completion", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": true, "hash": "5c92dcc9c3ed88b26465a4aeabc8cdb448abace9", "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/5788c76c1ee122a3ed00189e88dcf9df1fba226c.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/2228493/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228493/checks/", "tags": {}, "headers": { "Return-Path": "\n <netfilter-devel+bounces-12201-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=NenE3BRc;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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charset=UTF-8", "Content-Transfer-Encoding": "8bit" }, "content": "After an association reaches ESTABLISHED, the peer’s init_tag is already\nknown from the handshake. Any subsequent INIT with the same init_tag is\nnot a valid restart, but a delayed or duplicate INIT.\n\nDrop such INIT chunks in sctp_sf_do_unexpected_init() instead of\nprocessing them as new association attempts.\n\nFixes: 1da177e4c3f4 (\"Linux-2.6.12-rc2\")\nSigned-off-by: Xin Long <lucien.xin@gmail.com>\nAcked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>\n---\nv2:\n - Fix INIT tag comparison by converting the on-wire init_tag to host byte\n order before comparing it with asoc->peer.i.init_tag.\n---\n net/sctp/sm_statefuns.c | 6 ++++++\n 1 file changed, 6 insertions(+)", "diff": "diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c\nindex 7b823d759141..8e89a870780c 100644\n--- a/net/sctp/sm_statefuns.c\n+++ b/net/sctp/sm_statefuns.c\n@@ -1556,6 +1556,12 @@ static enum sctp_disposition sctp_sf_do_unexpected_init(\n \t/* Tag the variable length parameters. */\n \tchunk->param_hdr.v = skb_pull(chunk->skb, sizeof(struct sctp_inithdr));\n \n+\tif (asoc->state >= SCTP_STATE_ESTABLISHED) {\n+\t\t/* Discard INIT matching peer vtag after handshake completion (stale INIT). */\n+\t\tif (ntohl(chunk->subh.init_hdr->init_tag) == asoc->peer.i.init_tag)\n+\t\t\treturn sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);\n+\t}\n+\n \t/* Verify the INIT chunk before processing it. */\n \terr_chunk = NULL;\n \tif (!sctp_verify_init(net, ep, asoc, chunk->chunk_hdr->type,\n", "prefixes": [ "net", "v2", "2/2" ] }