From patchwork Thu Aug 5 04:18:07 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: 12420261 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=-21.7 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 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 2AAF7C4320A for ; Thu, 5 Aug 2021 04:15:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E39761073 for ; Thu, 5 Aug 2021 04:15:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235877AbhHEEPk (ORCPT ); Thu, 5 Aug 2021 00:15:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:57236 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230215AbhHEEPk (ORCPT ); Thu, 5 Aug 2021 00:15:40 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E389861008; Thu, 5 Aug 2021 04:15:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628136926; bh=sKYzfoQnOauHaBevSJJ+01Qcw+1Iy/ZwKyQRsQ9BISE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NZz4wI/AMUyESr4eJ7QZZ8JVYq1lIkjE09UZrX92uyKsLqw2iqL8U6UsKXwbX0G1l Cf7B97aXb3hVsOh/gfUnFz3LPbueDbR0AaH7GoYvbV8WY8P3qXBxsaiSi3SaXRaChF jqiJ4PXVm+chC8rS5AUCqW/CfWRCPJBYbJ07bEPycCv2owwtx5ESZmBOtnwt9CDqLr vJfM+W3cPNd+niILrjVQ6sZg9nlUXV9tpwSBsfpghkKOAQDUixGaHexuLzKFB3vcmn eXdHE9yP1ecuFqsc/qS6H7D+dWdjkL3noZKjjr+89FXOuqkmpsBK6pt43qlxtKAaLL tR+jab5EVLPWw== Date: Wed, 4 Aug 2021 23:18:07 -0500 From: "Gustavo A. R. Silva" To: linux-kernel@vger.kernel.org Cc: Kashyap Desai , Sumit Saxena , Shivasharan S , "James E.J. Bottomley" , "Martin K. Petersen" , megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH v2 1/4][next] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_FW_RAID_MAP Message-ID: <8f32956f8e1699cd78231fd49a3a333b8fa11546.1628136510.git.gustavoars@kernel.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.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 MR_FW_RAID_MAP instead of one-element array, and use the struct_size() helper. This helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy(). [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 Link: https://github.com/KSPP/linux/issues/109 Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - Revert changes in struct MR_FW_RAID_MAP_ALL. - Update Subject line and changelog text. drivers/scsi/megaraid/megaraid_sas_base.c | 6 +++--- drivers/scsi/megaraid/megaraid_sas_fp.c | 6 +++--- drivers/scsi/megaraid/megaraid_sas_fusion.h | 2 +- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index ec10b2497310..d072f9caeb4a 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -5147,9 +5147,9 @@ static void megasas_update_ext_vd_details(struct megasas_instance *instance) fusion->current_map_sz = ventura_map_sz; fusion->max_map_sz = ventura_map_sz; } else { - fusion->old_map_sz = sizeof(struct MR_FW_RAID_MAP) + - (sizeof(struct MR_LD_SPAN_MAP) * - (instance->fw_supported_vd_count - 1)); + fusion->old_map_sz = + struct_size((struct MR_FW_RAID_MAP *)0, ldSpanMap, + instance->fw_supported_vd_count); fusion->new_map_sz = sizeof(struct MR_FW_RAID_MAP_EXT); fusion->max_map_sz = diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c index 83f69c33b01a..da1cad1ee123 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fp.c +++ b/drivers/scsi/megaraid/megaraid_sas_fp.c @@ -326,9 +326,9 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id) else if (instance->supportmax256vd) expected_size = sizeof(struct MR_FW_RAID_MAP_EXT); else - expected_size = - (sizeof(struct MR_FW_RAID_MAP) - sizeof(struct MR_LD_SPAN_MAP) + - (sizeof(struct MR_LD_SPAN_MAP) * le16_to_cpu(pDrvRaidMap->ldCount))); + expected_size = struct_size((struct MR_FW_RAID_MAP *)0, + ldSpanMap, + le16_to_cpu(pDrvRaidMap->ldCount)); if (le32_to_cpu(pDrvRaidMap->totalSize) != expected_size) { dev_dbg(&instance->pdev->dev, "megasas: map info structure size 0x%x", diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index ce84f811e5e1..a47139ef9ee2 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -942,7 +942,7 @@ struct MR_FW_RAID_MAP { u8 reserved2[7]; struct MR_ARRAY_INFO arMapInfo[MAX_RAIDMAP_ARRAYS]; struct MR_DEV_HANDLE_INFO devHndlInfo[MAX_RAIDMAP_PHYSICAL_DEVICES]; - struct MR_LD_SPAN_MAP ldSpanMap[1]; + struct MR_LD_SPAN_MAP ldSpanMap[]; }; struct IO_REQUEST_INFO { From patchwork Thu Aug 5 04:18:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12420263 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=-21.7 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 autolearn=ham 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 CAE30C4320A for ; Thu, 5 Aug 2021 04:16:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ABCFE61078 for ; Thu, 5 Aug 2021 04:16:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236099AbhHEEQb (ORCPT ); Thu, 5 Aug 2021 00:16:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:57502 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230215AbhHEEQa (ORCPT ); Thu, 5 Aug 2021 00:16:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id AD94E60F58; Thu, 5 Aug 2021 04:16:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628136977; bh=GYTjY+KFDYtNGY3RO8J3n+kq9mUnaStEDB2XfegLVEM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=somduTLxShxmAvjd1+6s3qrOvnopdi13zb7wLzTjGIMKGuKQRo72sD4oj5TqqLhuw H7Cdm5zlZBFI2+W5bCqiy1BOYYObOVnGD37Ix8OvdYopWbY5K5sa0xAVeQXh386t0c /BOQYyGtUxLCN1W8VzoqZTvzx8ByRvPhvX34gXTX0r4qR84UG0ZThsGMKcW1NBLrA+ cnOQE0QP1BosV2Qs0dt/Nb6jt5OG0iQHpxZu0XQiK+vS20d7+ahl1NARUB3NiwTNoB LUIdS4TzRoTqaIo4o7VzquFrECLs+1RiDNA1REemCabQRc3IJ8xOq1ik/SWHFboXbk Q4yP3E042Fqwg== Date: Wed, 4 Aug 2021 23:18:58 -0500 From: "Gustavo A. R. Silva" To: linux-kernel@vger.kernel.org Cc: Kashyap Desai , Sumit Saxena , Shivasharan S , "James E.J. Bottomley" , "Martin K. Petersen" , megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH v2 2/4][next] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_FW_RAID_MAP_DYNAMIC Message-ID: <894f0df7940def9afe2bcd3b8a982404a45bcba9.1628136510.git.gustavoars@kernel.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Replace one-element array with a flexible-array member in struct MR_FW_RAID_MAP_DYNAMIC. This helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy(). Link: https://en.wikipedia.org/wiki/Flexible_array_member Link: 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 Link: https://github.com/KSPP/linux/issues/109 Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - None. drivers/scsi/megaraid/megaraid_sas_fusion.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index a47139ef9ee2..9adb8b30f422 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -1053,7 +1053,7 @@ struct MR_FW_RAID_MAP_DYNAMIC { struct MR_RAID_MAP_DESC_TABLE raid_map_desc_table[RAID_MAP_DESC_TYPE_COUNT]; /* Variable Size buffer containing all data */ - u32 raid_map_desc_data[1]; + u32 raid_map_desc_data[]; }; /* Dynamicaly sized RAID MAp structure */ #define IEEE_SGE_FLAGS_ADDR_MASK (0x03) From patchwork Thu Aug 5 04:20:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12420265 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=-21.7 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 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 3FB28C4320A for ; Thu, 5 Aug 2021 04:17:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 124AA61029 for ; Thu, 5 Aug 2021 04:17:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236037AbhHEERm (ORCPT ); Thu, 5 Aug 2021 00:17:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:57886 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230215AbhHEERh (ORCPT ); Thu, 5 Aug 2021 00:17:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B0BD460EE8; Thu, 5 Aug 2021 04:17:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628137043; bh=RTGwVC+e9lhvKEwZi7nLPinHG/f37RvaD3B5wfWsEIU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GxifsXfmL6DnJo2RffAXP6/4ec+BTljLySYSlKCStKrr1G+PjoCdVDA1F7hobU+ZS ccFA49K5s+aRNlei6pweCcIAgdR/OAJLLGC4VApvvTCoT+JjK6nBVdO/xLyFbHaBFv Ryc/UeXAcnp5hM+MzjIw0iV7BQPyMYlzBftNJJ8jKh9SR7cjU7KRgM2CjOiLm0T+nI 5DfAzOpreAffTKu0gTkMW0MIEq2R9W7iPAsdbzr0AvaJxijT0DwxQlvZV7ECKThXKQ 3TAhbieG1JAdLl/LEJ+23IHxLG665+K+US8wPCwA0hMKzQG5d6/jWdlsa3rIEAuMnD N53zjdGkr4LLA== Date: Wed, 4 Aug 2021 23:20:04 -0500 From: "Gustavo A. R. Silva" To: linux-kernel@vger.kernel.org Cc: Kashyap Desai , Sumit Saxena , Shivasharan S , "James E.J. Bottomley" , "Martin K. Petersen" , megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH v2 3/4][next] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_DRV_RAID_MAP Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Replace one-element array with a flexible-array member in struct MR_DRV_RAID_MAP and use the flex_array_size() helper. This helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy(). Link: https://en.wikipedia.org/wiki/Flexible_array_member Link: 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 Link: https://github.com/KSPP/linux/issues/109 Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - None. drivers/scsi/megaraid/megaraid_sas_fp.c | 6 +++--- drivers/scsi/megaraid/megaraid_sas_fusion.h | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c index da1cad1ee123..9cb36ef96c2c 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fp.c +++ b/drivers/scsi/megaraid/megaraid_sas_fp.c @@ -229,8 +229,8 @@ static int MR_PopulateDrvRaidMap(struct megasas_instance *instance, u64 map_id) le32_to_cpu(desc_table->raid_map_desc_offset)); memcpy(pDrvRaidMap->ldSpanMap, fw_map_dyn->ld_span_map, - sizeof(struct MR_LD_SPAN_MAP) * - le32_to_cpu(desc_table->raid_map_desc_elements)); + flex_array_size(pDrvRaidMap, ldSpanMap, + le32_to_cpu(desc_table->raid_map_desc_elements))); break; default: dev_dbg(&instance->pdev->dev, "wrong number of desctableElements %d\n", @@ -254,7 +254,7 @@ static int MR_PopulateDrvRaidMap(struct megasas_instance *instance, u64 map_id) pDrvRaidMap->ldTgtIdToLd[i] = (u16)fw_map_ext->ldTgtIdToLd[i]; memcpy(pDrvRaidMap->ldSpanMap, fw_map_ext->ldSpanMap, - sizeof(struct MR_LD_SPAN_MAP) * ld_count); + flex_array_size(pDrvRaidMap, ldSpanMap, ld_count)); memcpy(pDrvRaidMap->arMapInfo, fw_map_ext->arMapInfo, sizeof(struct MR_ARRAY_INFO) * MAX_API_ARRAYS_EXT); memcpy(pDrvRaidMap->devHndlInfo, fw_map_ext->devHndlInfo, diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 9adb8b30f422..5fe2f7a6eebe 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -1182,7 +1182,7 @@ struct MR_DRV_RAID_MAP { devHndlInfo[MAX_RAIDMAP_PHYSICAL_DEVICES_DYN]; u16 ldTgtIdToLd[MAX_LOGICAL_DRIVES_DYN]; struct MR_ARRAY_INFO arMapInfo[MAX_API_ARRAYS_DYN]; - struct MR_LD_SPAN_MAP ldSpanMap[1]; + struct MR_LD_SPAN_MAP ldSpanMap[]; }; From patchwork Thu Aug 5 04:20:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12420267 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=-21.7 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=ham 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 AC7EEC4320A for ; Thu, 5 Aug 2021 04:18:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 92F7561073 for ; Thu, 5 Aug 2021 04:18:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234999AbhHEES0 (ORCPT ); Thu, 5 Aug 2021 00:18:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:58424 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230215AbhHEES0 (ORCPT ); Thu, 5 Aug 2021 00:18:26 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BA10F60EE8; Thu, 5 Aug 2021 04:18:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628137092; bh=mB5MPS4/ftvIsrloxEwJS3TMsTJM3QZc0j0Jm9hQDTU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Ft/IvNgtM0BjaNgo8URgJEl9VK4qdiNqXXHbKxXc2OEo95uBzW+IO/BAgxGjDzsdp HFLR+Fzy/p/NrEkV2M3hCF8skWxinorua25+mbs6oKE71XNjVnkIxVhqF28zhBBBmG MD3E2nYng9lEAoPG3Oj1tc3FiucKaK/Z5xNbhInDCqQXnbsVLKoBlRpu3ponfCNyRQ JGeYBxgNyIZi7MfPRvF3F/RJ5q9kRAtaYAZp3QS+0qIgAI0FBTLaTvZL6MBVKNwpOz BqCdawVBLSuBqUsHtz4xEGRkF70spLCNj4/gDPa55hUpgAk3XnpCXeWlil+YammEtP qYLByuFGplkSA== Date: Wed, 4 Aug 2021 23:20:53 -0500 From: "Gustavo A. R. Silva" To: linux-kernel@vger.kernel.org Cc: Kashyap Desai , Sumit Saxena , Shivasharan S , "James E.J. Bottomley" , "Martin K. Petersen" , megaraidlinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, linux-hardening@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH v2 4/4][next] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_PD_CFG_SEQ_NUM_SYNC Message-ID: <3860f4f6f06dff8e6aea4a8318e9515a0e9cbde3.1628136510.git.gustavoars@kernel.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Replace one-element array with a flexible-array member in struct MR_PD_CFG_SEQ_NUM_SYNC and use the struct_size() helper. This helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy(). Link: https://en.wikipedia.org/wiki/Flexible_array_member Link: 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 Link: https://github.com/KSPP/linux/issues/109 Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - None. drivers/scsi/megaraid/megaraid_sas_base.c | 14 +++++++------- drivers/scsi/megaraid/megaraid_sas_fusion.c | 2 +- drivers/scsi/megaraid/megaraid_sas_fusion.h | 2 +- 3 files changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index d072f9caeb4a..a4131dd510e3 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -5782,10 +5782,10 @@ megasas_setup_jbod_map(struct megasas_instance *instance) { int i; struct fusion_context *fusion = instance->ctrl_context; - u32 pd_seq_map_sz; + size_t pd_seq_map_sz; - pd_seq_map_sz = sizeof(struct MR_PD_CFG_SEQ_NUM_SYNC) + - (sizeof(struct MR_PD_CFG_SEQ) * (MAX_PHYSICAL_DEVICES - 1)); + pd_seq_map_sz = struct_size((struct MR_PD_CFG_SEQ_NUM_SYNC *)0, seq, + MAX_PHYSICAL_DEVICES); instance->use_seqnum_jbod_fp = instance->support_seqnum_jbod_fp; @@ -7961,7 +7961,7 @@ static void megasas_detach_one(struct pci_dev *pdev) struct Scsi_Host *host; struct megasas_instance *instance; struct fusion_context *fusion; - u32 pd_seq_map_sz; + size_t pd_seq_map_sz; instance = pci_get_drvdata(pdev); @@ -8033,9 +8033,9 @@ static void megasas_detach_one(struct pci_dev *pdev) if (instance->adapter_type != MFI_SERIES) { megasas_release_fusion(instance); - pd_seq_map_sz = sizeof(struct MR_PD_CFG_SEQ_NUM_SYNC) + - (sizeof(struct MR_PD_CFG_SEQ) * - (MAX_PHYSICAL_DEVICES - 1)); + pd_seq_map_sz = + struct_size((struct MR_PD_CFG_SEQ_NUM_SYNC *)0, + seq, MAX_PHYSICAL_DEVICES); for (i = 0; i < 2 ; i++) { if (fusion->ld_map[i]) dma_free_coherent(&instance->pdev->dev, diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 06399c026a8d..a824fb641fda 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -1310,7 +1310,7 @@ megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) { pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)]; pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)]; - pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES - 1); + pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES); cmd = megasas_get_cmd(instance); if (!cmd) { diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 5fe2f7a6eebe..af39d9c20cc6 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -1249,7 +1249,7 @@ struct MR_PD_CFG_SEQ { struct MR_PD_CFG_SEQ_NUM_SYNC { __le32 size; __le32 count; - struct MR_PD_CFG_SEQ seq[1]; + struct MR_PD_CFG_SEQ seq[]; } __packed; /* stream detection */