From patchwork Tue May 25 23:04:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12280335 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-21.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 010D2C47086 for ; Tue, 25 May 2021 23:03:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D67DF6140E for ; Tue, 25 May 2021 23:03:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232277AbhEYXFE (ORCPT ); Tue, 25 May 2021 19:05:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:33920 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232168AbhEYXFC (ORCPT ); Tue, 25 May 2021 19:05:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C20856140E; Tue, 25 May 2021 23:03:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621983812; bh=QhxsvamSXMWJxqaGVeAw0Ze987ooYgGDqsvI+KEZSIk=; h=Date:From:To:Cc:Subject:From; b=Bp0mlq2EKIPZvf9XmmkTUdmIkI2dY+67ntwk4C++tjVm6zgtmEe3L4RaWKkN6e02i N28mg4Yoptncrlwwc05oq/iZgRcgNsUr4KF4Dz3SACUNQEBtGOdo9QTkH0zNp6ZDVC ilH8FPj7IZ5fEkHREABt/aiHV7GVBMWDFtHpzEMzmAeRjIroXSa6foQGyhslv1o2Ax ZLVva3a6eK7TWb9J+WFlWmpLYQ34U5cJ77hC8T8DcPGORZ3L9QPypOqvZDcz3thSph 7fD80ezGAkYPu40G2DOQBqMArLVI/PQnLboenTluCLl29ELLZuQ7dn3FmIdZkvxWe0 BTlmFeTdhEjBg== Date: Tue, 25 May 2021 18:04:29 -0500 From: "Gustavo A. R. Silva" To: Jesse Brandeburg , Tony Nguyen , "David S. Miller" , Jakub Kicinski Cc: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" , linux-hardening@vger.kernel.org Subject: [PATCH][next] iavf: Replace one-element array in struct virtchnl_iwarp_qvlist_info and iavf_qvlist_info Message-ID: <20210525230429.GA175658@embeddedor> MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. Refactor the code according to the use of a flexible-array member in struct virtchnl_iwarp_qvlist_info and iavf_qvlist_info instead of one-element array, and use the flex_array_size() helper. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.10/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/79 Signed-off-by: Gustavo A. R. Silva --- drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 2 +- drivers/net/ethernet/intel/iavf/iavf_client.c | 2 +- drivers/net/ethernet/intel/iavf/iavf_client.h | 2 +- include/linux/avf/virtchnl.h | 8 ++++---- 4 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index c0afac8cf33b..6c55fe9cc132 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -515,7 +515,7 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf, kfree(vf->qvlist_info); vf->qvlist_info = kzalloc(struct_size(vf->qvlist_info, qv_info, - qvlist_info->num_vectors - 1), + qvlist_info->num_vectors), GFP_KERNEL); if (!vf->qvlist_info) { ret = -ENOMEM; diff --git a/drivers/net/ethernet/intel/iavf/iavf_client.c b/drivers/net/ethernet/intel/iavf/iavf_client.c index 0c77e4171808..e70da05ef322 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_client.c +++ b/drivers/net/ethernet/intel/iavf/iavf_client.c @@ -470,7 +470,7 @@ static int iavf_client_setup_qvlist(struct iavf_info *ldev, v_qvlist_info = (struct virtchnl_iwarp_qvlist_info *)qvlist_info; msg_size = struct_size(v_qvlist_info, qv_info, - v_qvlist_info->num_vectors - 1); + v_qvlist_info->num_vectors); adapter->client_pending |= BIT(VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP); err = iavf_aq_send_msg_to_pf(&adapter->hw, diff --git a/drivers/net/ethernet/intel/iavf/iavf_client.h b/drivers/net/ethernet/intel/iavf/iavf_client.h index 9a7cf39ea75a..b14a82b65626 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_client.h +++ b/drivers/net/ethernet/intel/iavf/iavf_client.h @@ -53,7 +53,7 @@ struct iavf_qv_info { struct iavf_qvlist_info { u32 num_vectors; - struct iavf_qv_info qv_info[1]; + struct iavf_qv_info qv_info[]; }; #define IAVF_CLIENT_MSIX_ALL 0xFFFFFFFF diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h index 85a687bc6096..15b982911321 100644 --- a/include/linux/avf/virtchnl.h +++ b/include/linux/avf/virtchnl.h @@ -658,10 +658,10 @@ VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_iwarp_qv_info); struct virtchnl_iwarp_qvlist_info { u32 num_vectors; - struct virtchnl_iwarp_qv_info qv_info[1]; + struct virtchnl_iwarp_qv_info qv_info[]; }; -VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_iwarp_qvlist_info); +VIRTCHNL_CHECK_STRUCT_LEN(4, virtchnl_iwarp_qvlist_info); /* VF reset states - these are written into the RSTAT register: * VFGEN_RSTAT on the VF @@ -1069,8 +1069,8 @@ virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode, err_msg_format = true; break; } - valid_len += ((qv->num_vectors - 1) * - sizeof(struct virtchnl_iwarp_qv_info)); + valid_len += flex_array_size(qv, qv_info, + qv->num_vectors); } break; case VIRTCHNL_OP_CONFIG_RSS_KEY: