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{ "id": 2220604, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2220604/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/20260407163121.480871-1-vinicius.peixoto@canonical.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.1/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260407163121.480871-1-vinicius.peixoto@canonical.com>", "date": "2026-04-07T16:31:19", "name": "[SRU,Q/N:linux-azure,v2,0/1] azure: backport \"net: hv_netvsc: reject RSS hash key programming without RX indirection table\"", "submitter": { "id": 88880, "url": "http://patchwork.ozlabs.org/api/1.1/people/88880/?format=api", "name": "Vinicius Peixoto", "email": "vinicius.peixoto@canonical.com" }, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/20260407163121.480871-1-vinicius.peixoto@canonical.com/mbox/", "series": [ { "id": 499001, "url": "http://patchwork.ozlabs.org/api/1.1/series/499001/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=499001", "date": "2026-04-07T16:31:21", "name": "azure: backport \"net: hv_netvsc: reject RSS hash key programming without RX indirection table\"", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/499001/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2220604/comments/", "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=lcYxRncE;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "BugLink: https://bugs.launchpad.net/bugs/2142703\n\n[Impact]\n\nRSS configuration requires a valid RX indirection table. However, if the\nnetwork device reports only a single RX queue, an indirection table will\nnot be allocated. hv_netvsc currently does not check for this and\nattempting to set the RSS hash key will hang VMs on Azure.\n\n[Fix]\n\nBackport the following fix:\n\nd23564955811 (\"net: hv_netvsc: reject RSS hash key programming without RX indirection table\")\n\n[Test plan]\n\nBuild tested only; Azure will run reproducers on their side to validate the fix.\n\n[Where problems could occur]\n\nThis is small, self-contained and has no side effects, but will change\nthe behavior of the hv_netvsc module upon an invalid RSS hash key update\noperation, which could cause issues related to network packet reception\nfor machines with multiple receive queues on Azure.\n\n[Other info]\nSF #00427202\n\n[Changelog]\nv1 -> v2: remove Jammy from the patchset since in that kernel the\nrx_table within struct net_device_context is statically allocated and\naccessing it inside netvsc_set_rxfh() will not cause a null pointer\ndereference.\n\nAditya Garg (1):\n net: hv_netvsc: reject RSS hash key programming without RX indirection\n table\n\n drivers/net/hyperv/netvsc_drv.c | 3 +++\n 1 file changed, 3 insertions(+)" }