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{ "id": 2230343, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2230343/?format=api", "web_url": "http://patchwork.ozlabs.org/project/openvswitch/cover/20260429151756.4157670-1-i.maximets@ovn.org/", "project": { "id": 47, "url": "http://patchwork.ozlabs.org/api/1.1/projects/47/?format=api", "name": "Open vSwitch", "link_name": "openvswitch", "list_id": "ovs-dev.openvswitch.org", "list_email": "ovs-dev@openvswitch.org", "web_url": "http://openvswitch.org/", "scm_url": "git@github.com:openvswitch/ovs.git", "webscm_url": "https://github.com/openvswitch/ovs" }, "msgid": "<20260429151756.4157670-1-i.maximets@ovn.org>", "date": "2026-04-29T15:16:35", "name": "[ovs-dev,net,0/2] openvswitch: fix self-deadlock on release of tunnel vports", "submitter": { "id": 76798, "url": "http://patchwork.ozlabs.org/api/1.1/people/76798/?format=api", "name": "Ilya Maximets", "email": "i.maximets@ovn.org" }, "mbox": "http://patchwork.ozlabs.org/project/openvswitch/cover/20260429151756.4157670-1-i.maximets@ovn.org/mbox/", "series": [ { "id": 502094, "url": "http://patchwork.ozlabs.org/api/1.1/series/502094/?format=api", "web_url": "http://patchwork.ozlabs.org/project/openvswitch/list/?series=502094", "date": "2026-04-29T15:16:35", "name": "openvswitch: fix self-deadlock on release of tunnel vports", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502094/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2230343/comments/", "headers": { "Return-Path": "<ovs-dev-bounces@openvswitch.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "dev@openvswitch.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "ovs-dev@lists.linuxfoundation.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=openvswitch.org\n (client-ip=2605:bc80:3010::136; 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Miller\" <davem@davemloft.net>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "ovs-dev-bounces@openvswitch.org", "Sender": "\"dev\" <ovs-dev-bounces@openvswitch.org>" }, "content": "Two patches - the fix for the actual bug and the selftest that reproduces it.\n\nI missed the self-deadlock in the original patch that introduced the issue,\nbecause testing required code modification in the ovs-vswitchd to force it to\nuse legacy tunnel ports. I thought I made the change correctly, but apparently\nsomething went wrong and the tests were run with the standard LWT infra instead.\nThe selftest added in this patch set will at least prevent this kind of mistakes\nin the future.\n\nI mentioned, however, that these tunnel vports are legacy and not actually used\nby ovs-vswitchd. RTM_NEWLINK + COLLECT_METADATA is used in conjunction with the\nstandard OVS_VPORT_TYPE_NETDEV instead since 2017. The code to use the legacy\ntunnels still exists in ovs-vswitchd however, but only as a fallback for older\nkernels and we're planning to remove it in the next release. I'll be sending an\nRFC to remove support for these legacy tunnel types from the kernel, as they\nserve no real purpose today and only increase the uAPI surface for CVEs, but\nwe need to fix the known bugs for stable versions.\n\nIlya Maximets (2):\n openvswitch: vport: fix self-deadlock on release of tunnel ports\n selftests: openvswitch: add tests for tunnel vport refcounting\n\n net/openvswitch/vport-netdev.c | 6 ++-\n .../selftests/net/openvswitch/openvswitch.sh | 37 +++++++++++++++++++\n .../selftests/net/openvswitch/ovs-dpctl.py | 10 ++---\n 3 files changed, 47 insertions(+), 6 deletions(-)" }