From patchwork Wed Jun 21 20:27:20 2023 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: 13287934 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 5427BEB64D7 for ; Wed, 21 Jun 2023 20:26:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230171AbjFUU0j (ORCPT ); Wed, 21 Jun 2023 16:26:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52344 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230305AbjFUU02 (ORCPT ); Wed, 21 Jun 2023 16:26:28 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E2011BFC; Wed, 21 Jun 2023 13:26:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B207E616A1; Wed, 21 Jun 2023 20:26:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37288C433C0; Wed, 21 Jun 2023 20:26:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1687379185; bh=IldafOrMYKZpxWjdW8Dzn1OfaBUtuI1eV2ylNsc6e4U=; h=Date:From:To:Cc:Subject:From; b=Y2yqS/Y4fgeMMrBp4GVpPiqQbkfNRrlEDKuueTlTQcPCkJMvcZl93ZvoNBGz2WDfd prh5aeFF+odgcGV6AHJovFc1nEKh5cxfzd3S8h2m07GFMUckTezMG4N7GGzAN8fHY4 d7JdCsfUVoBNmj2AlNadrUd87AzKOuZrRDvoL7MP1Vq9vBRZUd95XDNOMPjmUqQUKx JMS2PKX5AmaDfvzGLvKQ6Fu1YquE0AdOgntp9F8JvZUElb/mbC3KGDpstXFzmfDT7D xBHLVodDHNUxpMCFx2G+bfNhum2wBPFITdhqY5+waVCPStH3gMdb50Jy2z/dIh2biy 84S6CUf4NnFcQ== Date: Wed, 21 Jun 2023 14:27:20 -0600 From: "Gustavo A. R. Silva" To: Don Brace , "James E.J. Bottomley" , "Martin K. Petersen" Cc: storagedev@microchip.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" , linux-hardening@vger.kernel.org Subject: [PATCH][next] scsi: smartpqi: Replace one-element arrays with flexible-array members Message-ID: MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org One-element arrays are deprecated, and we are replacing them with flexible array members instead. So, replace one-element arrays with flexible-array members in a couple of structures, and refactor the rest of the code, accordingly. This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy(). This results in no differences in binary output. Link: https://github.com/KSPP/linux/issues/79 Link: https://github.com/KSPP/linux/issues/204 Signed-off-by: Gustavo A. R. Silva Reviewed-by: Kees Cook --- drivers/scsi/smartpqi/smartpqi.h | 4 ++-- drivers/scsi/smartpqi/smartpqi_init.c | 5 ++--- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h index f960b5095d09..e392eaf5b2bf 100644 --- a/drivers/scsi/smartpqi/smartpqi.h +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -982,12 +982,12 @@ struct report_phys_lun_16byte_wwid { struct report_phys_lun_8byte_wwid_list { struct report_lun_header header; - struct report_phys_lun_8byte_wwid lun_entries[1]; + struct report_phys_lun_8byte_wwid lun_entries[]; }; struct report_phys_lun_16byte_wwid_list { struct report_lun_header header; - struct report_phys_lun_16byte_wwid lun_entries[1]; + struct report_phys_lun_16byte_wwid lun_entries[]; }; struct raid_map_disk_data { diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 19af36e9a16d..6aaaa7ebca37 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -1203,7 +1203,6 @@ static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **b unsigned int i; u8 rpl_response_format; u32 num_physicals; - size_t rpl_16byte_wwid_list_length; void *rpl_list; struct report_lun_header *rpl_header; struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list; @@ -1232,9 +1231,9 @@ static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **b rpl_8byte_wwid_list = rpl_list; num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]); - rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid)); - rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL); + rpl_16byte_wwid_list = kmalloc(struct_size(rpl_16byte_wwid_list, lun_entries, + num_physicals), GFP_KERNEL); if (!rpl_16byte_wwid_list) return -ENOMEM;