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Tsirkin" , Lin Ma , "Jason Wang" , Xuan Zhuo , "Parav Pandit" CC: , Subject: [PATCH 1/2] vdpa: Complement vdpa_nl_policy for nlattr length check Date: Wed, 26 Jul 2023 21:30:50 +0300 Message-ID: <20230726183054.10761-3-dtatulea@nvidia.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230726183054.10761-1-dtatulea@nvidia.com> References: <20230726183054.10761-1-dtatulea@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT046:EE_|PH0PR12MB8031:EE_ X-MS-Office365-Filtering-Correlation-Id: f774c81c-55ff-4df6-21c4-08db8e0685f7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(346002)(136003)(376002)(396003)(82310400008)(451199021)(40470700004)(36840700001)(46966006)(2906002)(40460700003)(36756003)(82740400003)(336012)(1076003)(186003)(86362001)(26005)(83380400001)(47076005)(2616005)(426003)(36860700001)(7636003)(356005)(6666004)(478600001)(110136005)(40480700001)(54906003)(70206006)(70586007)(8936002)(41300700001)(8676002)(4326008)(316002)(6636002)(5660300002);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jul 2023 18:31:27.0008 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f774c81c-55ff-4df6-21c4-08db8e0685f7 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT046.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB8031 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Lin Ma The vdpa_nl_policy structure is used to validate the nlattr when parsing the incoming nlmsg. It will ensure the attribute being described produces a valid nlattr pointer in info->attrs before entering into each handler in vdpa_nl_ops. That is to say, the missing part in vdpa_nl_policy may lead to illegal nlattr after parsing, which could lead to OOB read just like CVE-2023-3773. This patch adds three missing nla_policy to avoid such bugs. Fixes: 90fea5a800c3 ("vdpa: device feature provisioning") Fixes: 13b00b135665 ("vdpa: Add support for querying vendor statistics") Fixes: ad69dd0bf26b ("vdpa: Introduce query of device config layout") Signed-off-by: Lin Ma --- drivers/vdpa/vdpa.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index 965e32529eb8..f2f654fd84e5 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -1247,8 +1247,11 @@ static const struct nla_policy vdpa_nl_policy[VDPA_A= TTR_MAX + 1] =3D { [VDPA_ATTR_MGMTDEV_DEV_NAME] =3D { .type =3D NLA_STRING }, [VDPA_ATTR_DEV_NAME] =3D { .type =3D NLA_STRING }, [VDPA_ATTR_DEV_NET_CFG_MACADDR] =3D NLA_POLICY_ETH_ADDR, + [VDPA_ATTR_DEV_NET_CFG_MAX_VQP] =3D { .type =3D NLA_U16 }, /* virtio spec 1.1 section 5.1.4.1 for valid MTU range */ [VDPA_ATTR_DEV_NET_CFG_MTU] =3D NLA_POLICY_MIN(NLA_U16, 68), + [VDPA_ATTR_DEV_QUEUE_INDEX] =3D { .type =3D NLA_U32 }, + [VDPA_ATTR_DEV_FEATURES] =3D { .type =3D NLA_U64 }, }; =20 static const struct genl_ops vdpa_nl_ops[] =3D { --=20 2.41.0 From nobody Sun Feb 8 00:12:26 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D897C0015E for ; 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Wed, 26 Jul 2023 11:31:20 -0700 From: Dragos Tatulea To: "Michael S . Tsirkin" , Lin Ma , "Jason Wang" , Xuan Zhuo , "Parav Pandit" CC: , , Dragos Tatulea Subject: [PATCH 2/2] vdpa: Enable strict validation for netlinks ops Date: Wed, 26 Jul 2023 21:30:52 +0300 Message-ID: <20230726183054.10761-5-dtatulea@nvidia.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230726183054.10761-1-dtatulea@nvidia.com> References: <20230726183054.10761-1-dtatulea@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT046:EE_|BL1PR12MB5272:EE_ X-MS-Office365-Filtering-Correlation-Id: afd3126e-f57b-4e1b-4b11-08db8e068a17 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230028)(4636009)(136003)(376002)(396003)(346002)(39860400002)(82310400008)(451199021)(46966006)(36840700001)(40470700004)(83380400001)(36860700001)(110136005)(54906003)(478600001)(47076005)(2616005)(8676002)(8936002)(5660300002)(36756003)(41300700001)(426003)(2906002)(40480700001)(7636003)(70586007)(70206006)(86362001)(316002)(356005)(4326008)(6636002)(40460700003)(336012)(107886003)(82740400003)(6666004)(26005)(186003)(1076003);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jul 2023 18:31:33.9381 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: afd3126e-f57b-4e1b-4b11-08db8e068a17 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT046.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5272 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The previous patch added the missing nla policies that were required for validation to work. Now strict validation on netlink ops can be enabled. This patch does it. Signed-off-by: Dragos Tatulea --- drivers/vdpa/vdpa.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index f2f654fd84e5..a7612e0783b3 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -1257,37 +1257,31 @@ static const struct nla_policy vdpa_nl_policy[VDPA_= ATTR_MAX + 1] =3D { static const struct genl_ops vdpa_nl_ops[] =3D { { .cmd =3D VDPA_CMD_MGMTDEV_GET, - .validate =3D GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit =3D vdpa_nl_cmd_mgmtdev_get_doit, .dumpit =3D vdpa_nl_cmd_mgmtdev_get_dumpit, }, { .cmd =3D VDPA_CMD_DEV_NEW, - .validate =3D GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit =3D vdpa_nl_cmd_dev_add_set_doit, .flags =3D GENL_ADMIN_PERM, }, { .cmd =3D VDPA_CMD_DEV_DEL, - .validate =3D GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit =3D vdpa_nl_cmd_dev_del_set_doit, .flags =3D GENL_ADMIN_PERM, }, { .cmd =3D VDPA_CMD_DEV_GET, - .validate =3D GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit =3D vdpa_nl_cmd_dev_get_doit, .dumpit =3D vdpa_nl_cmd_dev_get_dumpit, }, { .cmd =3D VDPA_CMD_DEV_CONFIG_GET, - .validate =3D GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit =3D vdpa_nl_cmd_dev_config_get_doit, .dumpit =3D vdpa_nl_cmd_dev_config_get_dumpit, }, { .cmd =3D VDPA_CMD_DEV_VSTATS_GET, - .validate =3D GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, .doit =3D vdpa_nl_cmd_dev_stats_get_doit, .flags =3D GENL_ADMIN_PERM, }, --=20 2.41.0