[{"id":3674616,"web_url":"http://patchwork.ozlabs.org/comment/3674616/","msgid":"","list_archive_url":null,"date":"2026-04-08T07:31:58","subject":"ACK: [SRU][Q/N:linux-azure][PATCH v2 0/1] azure: backport \"net:\n hv_netvsc: reject RSS hash key programming without RX indirection table\"","submitter":{"id":92836,"url":"http://patchwork.ozlabs.org/api/people/92836/","name":"Yufeng Gao","email":"yufeng.gao@canonical.com"},"content":"On 8/4/26 02:31, Vinicius Peixoto wrote:\n> BugLink: https://bugs.launchpad.net/bugs/2142703\n>\n> [Impact]\n>\n> RSS configuration requires a valid RX indirection table. However, if the\n> network device reports only a single RX queue, an indirection table will\n> not be allocated. hv_netvsc currently does not check for this and\n> attempting to set the RSS hash key will hang VMs on Azure.\n>\n> [Fix]\n>\n> Backport the following fix:\n>\n> d23564955811 (\"net: hv_netvsc: reject RSS hash key programming without RX indirection table\")\n>\n> [Test plan]\n>\n> Build tested only; Azure will run reproducers on their side to validate the fix.\n>\n> [Where problems could occur]\n>\n> This is small, self-contained and has no side effects, but will change\n> the behavior of the hv_netvsc module upon an invalid RSS hash key update\n> operation, which could cause issues related to network packet reception\n> for machines with multiple receive queues on Azure.\n>\n> [Other info]\n> SF #00427202\n>\n> [Changelog]\n> v1 -> v2: remove Jammy from the patchset since in that kernel the\n> rx_table within struct net_device_context is statically allocated and\n> accessing it inside netvsc_set_rxfh() will not cause a null pointer\n> dereference.\n>\n> Aditya 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(+)\n>\nAcked-by: Yufeng Gao ","headers":{"Return-Path":"","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=NQkU9/W7;\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\"; Format=\"flowed\"","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "}},{"id":3674980,"web_url":"http://patchwork.ozlabs.org/comment/3674980/","msgid":"<104df251-e223-4f07-97ec-11545ddbf6cc@canonical.com>","list_archive_url":null,"date":"2026-04-08T20:35:20","subject":"ACK/Cmnt: [SRU][Q/N:linux-azure][PATCH v2 0/1] azure: backport \"net:\n hv_netvsc: reject RSS hash key programming without RX indirection\n table\"","submitter":{"id":85032,"url":"http://patchwork.ozlabs.org/api/people/85032/","name":"John Cabaj","email":"john.cabaj@canonical.com"},"content":"On 4/7/26 11:31 AM, Vinicius Peixoto wrote:\n> BugLink: https://bugs.launchpad.net/bugs/2142703\n\nIf Jammy isn't affected, by sure to indicate we aren't fixing that \nrelease in the LP bug\n\nAcked-by: John Cabaj \n\n> \n> [Impact]\n> \n> RSS configuration requires a valid RX indirection table. However, if the\n> network device reports only a single RX queue, an indirection table will\n> not be allocated. hv_netvsc currently does not check for this and\n> attempting to set the RSS hash key will hang VMs on Azure.\n> \n> [Fix]\n> \n> Backport the following fix:\n> \n> d23564955811 (\"net: hv_netvsc: reject RSS hash key programming without RX indirection table\")\n> \n> [Test plan]\n> \n> Build tested only; Azure will run reproducers on their side to validate the fix.\n> \n> [Where problems could occur]\n> \n> This is small, self-contained and has no side effects, but will change\n> the behavior of the hv_netvsc module upon an invalid RSS hash key update\n> operation, which could cause issues related to network packet reception\n> for machines with multiple receive queues on Azure.\n> \n> [Other info]\n> SF #00427202\n> \n> [Changelog]\n> v1 -> v2: remove Jammy from the patchset since in that kernel the\n> rx_table within struct net_device_context is statically allocated and\n> accessing it inside netvsc_set_rxfh() will not cause a null pointer\n> dereference.\n> \n> Aditya 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(+)\n>","headers":{"Return-Path":"","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=URRv5UIN;\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; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4frZZl3HHKz1yD3\n\tfor ; Thu, 09 Apr 2026 06:35:42 +1000 (AEST)","from localhost ([127.0.0.1] helo=lists.ubuntu.com)\n\tby lists.ubuntu.com with esmtp (Exim 4.86_2)\n\t(envelope-from )\n\tid 1wAZcZ-0000Dn-6F; Wed, 08 Apr 2026 20:35:31 +0000","from smtp-relay-internal-0.internal ([10.131.114.225]\n helo=smtp-relay-internal-0.canonical.com)\n by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.86_2) (envelope-from )\n id 1wAZcX-0000D2-Ls\n for kernel-team@lists.ubuntu.com; Wed, 08 Apr 2026 20:35:29 +0000","from mail-qv1-f71.google.com (mail-qv1-f71.google.com\n [209.85.219.71])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 578333F652\n for ; Wed, 8 Apr 2026 20:35:29 +0000 (UTC)","by mail-qv1-f71.google.com with SMTP id\n 6a1803df08f44-89ce2a7fef6so6831496d6.1\n for ; Wed, 08 Apr 2026 13:35:29 -0700 (PDT)","from [192.168.1.218]\n (h208-73-92-250.mdtnwi.broadband.dynamic.tds.net. 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