From patchwork Wed Jun 28 17:57:48 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: 698606 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 A694AEB64DC for ; Wed, 28 Jun 2023 17:58:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232285AbjF1R6P (ORCPT ); Wed, 28 Jun 2023 13:58:15 -0400 Received: from dfw.source.kernel.org ([139.178.84.217]:38110 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232016AbjF1R4z (ORCPT ); Wed, 28 Jun 2023 13:56:55 -0400 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 8435F61425; Wed, 28 Jun 2023 17:56:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20271C433C0; Wed, 28 Jun 2023 17:56:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1687975014; bh=td4cyQQksCxGhpEodkvmN0yoaLrNPgSUoTLfY9rGDgw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fB+3roWxpteaF0aMShsipBAj4bahjfCFQctyoGq3B5zVfMEaqDe1n2TIWQmB68bxh 48BVgJYR8oLZtdVm9fFLMMr95TUufrtPx/eLi4IEMv9AXbOnvJvD4KVPQWbVt2egTH 1DINJwCnOgM2gFFjZM/r5lJ1Cd4Gu8d+9gqYl1sPHBKSNR0y74nuNdMkq+S7DHkAWx 3le0rEcZPDCBQY/VD5LtH7yfMFOgW41OqkK5b2DHNEdy92QVcRV0j/sEuFiL3hGC8p UUcqI+BTPD6vtl7oZwqtj1HSBRPa9aVbPOWeGMokq/ZMyluYqtGbomLM/sMeLxBYlD HewzNxyoc1/xA== Date: Wed, 28 Jun 2023 11:57:48 -0600 From: "Gustavo A. R. Silva" To: aacraid@microsemi.com, "James E.J. Bottomley" , "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook , "Gustavo A. R. Silva" , linux-hardening@vger.kernel.org Subject: [PATCH 10/10][next] scsi: aacraid: Replace one-element array with flexible-array member in struct user_sgmap Message-ID: <2ebb702f25c4764fb36ab29f4f40728e12b0e42b.1687974498.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 flexible-array member in struct user_sgmap and refactor the rest of the code, accordingly. Issue found with the help of Coccinelle and audited and fixed, manually. This results in no differences in binary output. Link: https://github.com/KSPP/linux/issues/79 Link: https://github.com/ClangBuiltLinux/linux/issues/1851 Signed-off-by: Gustavo A. R. Silva --- drivers/scsi/aacraid/aacraid.h | 2 +- drivers/scsi/aacraid/commctrl.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index fb3d93e4a99e..7d3f2f7348ff 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -512,7 +512,7 @@ struct sgmap { struct user_sgmap { u32 count; - struct user_sgentry sg[1]; + struct user_sgentry sg[]; }; struct sgmap64 { diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c index df811ad4afaa..74eb33eb70d3 100644 --- a/drivers/scsi/aacraid/commctrl.c +++ b/drivers/scsi/aacraid/commctrl.c @@ -523,7 +523,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) goto cleanup; } - if ((fibsize < (sizeof(struct user_aac_srb) - sizeof(struct user_sgentry))) || + if ((fibsize < sizeof(struct user_aac_srb)) || (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))) { rcode = -EINVAL; goto cleanup;