From patchwork Thu Jan 5 21:41:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 39805 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp510224wrt; Thu, 5 Jan 2023 13:51:33 -0800 (PST) X-Google-Smtp-Source: AMrXdXvXdnZhq9uNA2sDjTc6VgGGeae1rR8wuuZIbYKIJXgy7VAegdwGSlt18IbWgE/PDNTX9VLY X-Received: by 2002:a17:902:e5cd:b0:192:9140:ee76 with SMTP id u13-20020a170902e5cd00b001929140ee76mr48843201plf.37.1672955493304; Thu, 05 Jan 2023 13:51:33 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1672955493; cv=none; d=google.com; s=arc-20160816; b=apze3ciHzpU1sqhUFzmS9a7GYaXMmrvBmx6oW/NPi8IVIx97z8/7Uhwu4FVRwcOi3k ONwe2U0qQtK9ST4pGz3MophQg/F5sgLgUdVhXPHoZ7QkyaD01K0zgxsNK9r6T/N3ohxK H4hZQdgivk6EWS02UPvVB/SJPbtRfgRQlMT7QrFflm9flII+DrjAChHu/xyaFicDyGLh WqEWdww5/zg3PBJ8UTS2CKe8EDCJr+Od+93GWWseYdk3oQEFR95pBKXMKZPWzJj/bP0k RFbdkD+AmKe1vdKROnIEi/MDq94jpGMcgqS4zenhf1fhC8T6u/ic1w86dS/UcIOb+VmW GsaA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=Gr7VY1xr8D50GfMBWbQ+mcfUi8VYRH93LwFJZAO1KrE=; b=MVOLdCCtZ7VgeQq3bKv0VZztT4C6MbyiMEE+NZU57k+Sc0EF7RVMaRR1YF8WxDyGzO WcYYKSDAyku8pMbYiBBkz1HAtJ3JBFd2i87j/5SOFXc95jX+0/IksES5xn66tmdhYLXx 8XfIH/ZgmcClGCdUoTNBOyyLnb1HZq18nYBOoearSId7MtE7ysEwcrfvbVmCwM8Xu6W5 JKgMSkZcr4neVPynF1J9E1yxiFiITwsPQuztDg2ie8mqpC5ohaBKKLDx2Px1ihcbvQnD +c8bT4Gky3rQvwqQMsSVzpSHATCazHTWrR7kEJyEEe65dvqcNovcSSeoAy/lWFXoewR0 58OQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=biqkWJn0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id s18-20020a170902ea1200b0018725be1285si41112668plg.558.2023.01.05.13.51.20; Thu, 05 Jan 2023 13:51:33 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=biqkWJn0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235859AbjAEVll (ORCPT + 99 others); Thu, 5 Jan 2023 16:41:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235813AbjAEVlj (ORCPT ); Thu, 5 Jan 2023 16:41:39 -0500 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF819671A8 for ; Thu, 5 Jan 2023 13:41:38 -0800 (PST) Received: by mail-pf1-x432.google.com with SMTP id w203so9702111pfc.12 for ; Thu, 05 Jan 2023 13:41:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Gr7VY1xr8D50GfMBWbQ+mcfUi8VYRH93LwFJZAO1KrE=; b=biqkWJn0JUgt6jN4Ix6J/6fD4m/GhQDQiMCPCM8Ezph5YY1SQnjqZKMB5f7QVA3ruy tT5z9opi5Ifq9fwpW+P8BDtYJCxGWahQkTZfnQDJlEYruUx6Hfcjxz/aeliuYZuEcsjG spbnNKGDNcv9emj8ItKmvjqCnXJoAs8jfKwcY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Gr7VY1xr8D50GfMBWbQ+mcfUi8VYRH93LwFJZAO1KrE=; b=hFAXG4XKl79CgXwZtR5mQzMqiWSjCsP0lkVzQ/Womc1Vi7rJkWZDjzA29iYfEIJbir NsruaVgCxwDRzm3flN7cSWk4aqHNsdUm9EL82V/H76Q6TTvGtolKswbO6IoK4AfHWDbP AnMHCBonWQt/rMyw6lib11TWbwFvou6gzeT6hBr/neBrkT+7INTjlWXs4oGQxLh3W/8z fgvqAVf/gzE6+bLEaihjnV9w52YJvRXIM32PFy2qzAoRS+snZQuq7NVGG/B9uvsRChdR cJdLGmOxg5qF+KxCteSMkFPgj4gXlm1dEhYu4ZrJQ8GZmnrMyutAzW1uqcI7b6Bea9pk KeKg== X-Gm-Message-State: AFqh2koEtjYDZXzFCNwSBitUKGuP0a4ccE4EQgD0YE3M/Bd5WtUmqac/ Db76PaYodtxfyp/GhyPeS2NeFQ== X-Received: by 2002:a05:6a00:24c9:b0:57f:7bb4:8fce with SMTP id d9-20020a056a0024c900b0057f7bb48fcemr62907948pfv.32.1672954898477; Thu, 05 Jan 2023 13:41:38 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id f17-20020aa79691000000b005825b8e0540sm9219022pfk.204.2023.01.05.13.41.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Jan 2023 13:41:37 -0800 (PST) From: Kees Cook To: "David S. Miller" Cc: Kees Cook , Jakub Kicinski , Andrew Lunn , kernel test robot , Oleksij Rempel , Sean Anderson , Alexandru Tachici , Amit Cohen , "Gustavo A. R. Silva" , Vincent Mailhol , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH] ethtool: Replace 0-length array with flexible array Date: Thu, 5 Jan 2023 13:41:34 -0800 Message-Id: <20230105214126.never.757-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1999; h=from:subject:message-id; bh=l87vgCNM54oMq3NmxL6kds7jYVmQqBDhqu2JC3Cjh/U=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBjt0QOa22l3Q274W3yAGBVWu+cD27M21OizpluzMHW zmLGeXyJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCY7dEDgAKCRCJcvTf3G3AJgxED/ sHusJjKAWOo0tmDLlG/D9LAVElK2oD/fFV4n2wXZduPK5X6mtQ2VIMJGbXqW4shFHUTX0MMw2pgYiS 6xbDlY3/TLuU6oRKlPL9OjviI5R4kxwREx/m+CnFV0YjMjIsmLMNzuNSB9sUwIYp6Wr/iARWeMkgpv XVUK7ujwfwxKbw+gMDU19IkL6xlh1Z1pPI4H13w1rZmO03v3WfofSLOxc4ST9uowmhnowtrPH35jki afPHMiSXb8wfGn6evxLz7WG/ga2grxvoHcfFHTbBWWqBKpG6a0ga9L0DTLyKIWduFGW3sYvLTQlSec x8tSnxgqOncZuTMfFdHKiOUX72KjD/EEIzZsuYVLIND6WAbvsq2J6TY71Aevbu4JR17QEbiJAJm9vG PXBodZdFkAElbgH0cFilyKsUsbVNpmcweFi6b0nvJ1294E4w2kfR2R7hsw4XFPJ7K36/nIUmZIiJQh HJQ8Uvyc3k/F9/wZuWJfNlHBeWndxlJbgiKvbdQj7tmYcb4IFQkGWtoLgA+coL7i/v1keiLUJmwjPu iZiLJkm+58YDJueYesJzwEx1Hs7G5H6/8O1gm68dlFMF553iKTaykRzk3Ovg4lwId8lJsUFv3VV1VS QrI6Jb1RYihGQT0LxXCxFGxrddRjQY6VLYFfFuFlWdGxvevcKSop1xYQfkrQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754220979245460804?= X-GMAIL-MSGID: =?utf-8?q?1754220979245460804?= Zero-length arrays are deprecated[1]. Replace struct ethtool_rxnfc's "rule_locs" 0-length array with a flexible array. Detected with GCC 13, using -fstrict-flex-arrays=3: net/ethtool/common.c: In function 'ethtool_get_max_rxnfc_channel': net/ethtool/common.c:558:55: warning: array subscript i is outside array bounds of '__u32[0]' {aka 'unsigned int[]'} [-Warray-bounds=] 558 | .fs.location = info->rule_locs[i], | ~~~~~~~~~~~~~~~^~~ In file included from include/linux/ethtool.h:19, from include/uapi/linux/ethtool_netlink.h:12, from include/linux/ethtool_netlink.h:6, from net/ethtool/common.c:3: include/uapi/linux/ethtool.h:1186:41: note: while referencing 'rule_locs' 1186 | __u32 rule_locs[0]; | ^~~~~~~~~ [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays Cc: "David S. Miller" Cc: Jakub Kicinski Cc: Andrew Lunn Cc: kernel test robot Cc: Oleksij Rempel Cc: Sean Anderson Cc: Alexandru Tachici Cc: Amit Cohen Cc: "Gustavo A. R. Silva" Cc: Vincent Mailhol Signed-off-by: Kees Cook --- include/uapi/linux/ethtool.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 58e587ba0450..9b97b3e0ec1f 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -1183,7 +1183,7 @@ struct ethtool_rxnfc { __u32 rule_cnt; __u32 rss_context; }; - __u32 rule_locs[0]; + __DECLARE_FLEX_ARRAY(__u32, rule_locs); };