From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 BF486C433F5 for ; Sat, 4 Sep 2021 09:23:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 939FE60F3A for ; Sat, 4 Sep 2021 09:23:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350924AbhIDJYI (ORCPT ); Sat, 4 Sep 2021 05:24:08 -0400 Received: from mout.gmx.net ([212.227.17.22]:51087 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234866AbhIDJYG (ORCPT ); Sat, 4 Sep 2021 05:24:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1630747360; bh=L8fR945KNUQU+9zGd9AirfrQd7Dhe+868DIRkoUMeH0=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=KPuwhoGdL1qtDoIegwLhiFudjE9mb4U/uYMLe62hqCmdXmKQrlkc5t+529UOGi28V 0EGugWzvEUKDat/PMWYgya+QPYfCVH1y5VZQDLHXOKX3j9J7HY1kAnInlBre7hkGtc 7CHfeoQrjNCIhH2L87tFdmflw4IAilEpy1TJxZcA= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from localhost.localdomain ([79.150.72.99]) by mail.gmx.net (mrgmx104 [212.227.17.174]) with ESMTPSA (Nemesis) id 1MtwUm-1nGkKi0f8u-00uFTU; Sat, 04 Sep 2021 11:22:40 +0200 From: Len Baker To: Arend van Spriel , Franky Lin , Hante Meuleman , Chi-hsien Lin , Wright Feng , Chung-hsien Hsu , Kalle Valo , "David S. Miller" , Jakub Kicinski Cc: Len Baker , "Gustavo A. R. Silva" , Kees Cook , Shawn Guo , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com, netdev@vger.kernel.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] brcmfmac: Replace zero-length array with flexible array member Date: Sat, 4 Sep 2021 11:22:17 +0200 Message-Id: <20210904092217.2848-1-len.baker@gmx.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:euYYOsb5q5zCJ4JY1G8MCDhKfAWFs1ghhE5kP0cv6RywSV2UxZ1 fxPceTtBwTdShAJ6/4x+825c0S3Ky6CsOuUrvOH4K6U+scsz9heJrrgeJB8euqfflTid0SR Un3U1J6gvPXYSOB2XKbNO4eQPeBBnbeUypYI2+8u/+/bE3yjSBP3gN+2qIa/H7vn9HAnTvk /KroPLIRgjq/VVEPEuLLg== X-UI-Out-Filterresults: notjunk:1;V03:K0:EKAQ7qUHQtE=:gVhJg9ndawlGst90XC9ztI 1GpYupu7tWcNmgjgMbohKTP9fZqwZpV24Dx7jeAh66bY5T+mdDeMFkXyfsJY8tFgZLRegKZIA U/UtHq1bgkCaRkrQaXttPvpL0+wndlh1DD5ZcBgpqkBWayPmCxPu5ASc6HQsmqiT/gRGib109 rkrMBU9wqZjAacHEWVb8cwLd7z7P2ic8ZxXoSffx9sPsJ2C7AlJVqUk5a7y8lwl1Kvr4PJf0R tn6yjkXN75kyKNg+/SaXymeivKMmb4/BxYhkEtdJyrGqR/5aG7Ewd157oO4mDM14w7kPDuqtj wLUKgpL/YgQgwFdb9t6AKqXau3Q3oNM86P3a+6gJYUCJDWshvYQSKA9zxgwqakKIauxJKIvBH Hmt0f3KFlBfrpx9m+MZxCjALvXgZAiuqUncVyIoleMaRcAOHgC07H/KnMqz39bBLATgx0dokD jZ0Qjkb1Q1g6tdNKNT1YuHUV/dI9okBaM74mvbb5grB637AsqXfgGXcHFSPgmiT1MVu/cOOYj We9WefT14CgpduKxebRWd0UMzKmoB4psDOR6flebXUDi8mY8VHvw2PV7SQ1v4nNIrPUdY85C5 CGkAWULOpG8z9dccR0NZixztTLM5QgXGXnI18UpQLoocT+250OTm5VGp31iKZfIF890joCJ83 nax8+NVWxqn0s07uBvz2lTaivWLlE31NDbmI3cE/NL73WZpOke8rBmtC8SDzYMydOnuC4FOiR qOl62mHUTtBvKtv4detKnL+VpD03rzp2LTNNTxsmVzPMumMh3F5NsdwhU1qxum1rJbkO3Lw0n rWPYD+ACWU32DD8R29R+sLky0dUYIYd266fMBQuyp4Glt5qWmM2Spwr90ec4KPKyiw9gTMotE rv1Xo2Re19XFWsCkpHUpUjfmWWJBeAOPAmL544OvoT7aHzArAnTZNGoKQXdAlusYEhzuMxaM0 B+6gFRVh+OpDpEqpz1oYwMYsocz+vB/AYSm5te926yVJb35tz3cWWllWPL9W5ylHc67VEDcAa 9oqnmm+D/kwiRPaq3/Ywj0VLMbjbzp+ZaRjW3+JSd7OjNdU99CNdzRCJDdRNjZkJfCTbKHr37 X12l52GhnS4tOfDv4ym044m4sZx99wmWfc0bjb1kX1dXWXG2zlyRmCUlA== Precedence: bulk List-ID: X-Mailing-List: linux-hardening@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]. Also, make use of the struct_size() helper in devm_kzalloc(). [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.14/process/deprecated.html#zero-len= gth-and-one-element-arrays Signed-off-by: Len Baker =2D-- drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c | 2 +- include/linux/platform_data/brcmfmac.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drive= rs/net/wireless/broadcom/brcm80211/brcmfmac/of.c index 2f7bc3a70c65..513c7e6421b2 100644 =2D-- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c @@ -29,7 +29,7 @@ static int brcmf_of_get_country_codes(struct device *dev= , return (count =3D=3D -EINVAL) ? 0 : count; } - cc =3D devm_kzalloc(dev, sizeof(*cc) + count * sizeof(*cce), GFP_KERNEL)= ; + cc =3D devm_kzalloc(dev, struct_size(cc, table, count), GFP_KERNEL); if (!cc) return -ENOMEM; diff --git a/include/linux/platform_data/brcmfmac.h b/include/linux/platfo= rm_data/brcmfmac.h index 1d30bf278231..2b5676ff35be 100644 =2D-- a/include/linux/platform_data/brcmfmac.h +++ b/include/linux/platform_data/brcmfmac.h @@ -125,7 +125,7 @@ struct brcmfmac_pd_cc_entry { */ struct brcmfmac_pd_cc { int table_size; - struct brcmfmac_pd_cc_entry table[0]; + struct brcmfmac_pd_cc_entry table[]; }; /** =2D- 2.25.1