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 44AB0C61DA7 for ; Fri, 27 Jan 2023 23:44:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231630AbjA0Xob (ORCPT ); Fri, 27 Jan 2023 18:44:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229619AbjA0Xo3 (ORCPT ); Fri, 27 Jan 2023 18:44:29 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CB2B5A806; Fri, 27 Jan 2023 15:44:28 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A9EF0B82145; Fri, 27 Jan 2023 23:44:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50B33C433EF; Fri, 27 Jan 2023 23:44:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674863065; bh=xAjRM3OwrCzPKZqjeYMU/ZIJa1szvJnod3xJDEu9BKw=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=i3ne9xBg3WgMnuRsia/MVaG1UqzDhirZwAl6VgjlsiYZhuEr85T9kf9SEsG3+J4oX GrS9tFXI8l+8Y72Vy3YxGM5KxtdJyfZzpD0eyGwA14lZY4MCcZt/w41XTH5A25Xy1q y/Je8cArvnNfd7Iwg+qMJp4Q6Km79Et34jr7n9CDL+CXw+YQeZ6tUAb60g99oIk2SA kuynngwKGRkb50/OqC3LPtoY+WG0JtAEZfmap1OfTML6QXHv7Rt4VqR7YiAK0nCJO9 3nlXugIRSVbdd35gDRBCYuCKSiOkuKQuax0d9Q4KTRA9Xi2+pzQu3K5KP0xLIzr5IN Jidk3axeE0KwA== Received: by mail-vs1-f47.google.com with SMTP id h19so5161007vsv.13; Fri, 27 Jan 2023 15:44:25 -0800 (PST) X-Gm-Message-State: AFqh2kqkq47fPwLWa2fZmtY4fjJyq0wlKBhsvNIPNiZJR3yOe4kptHPu 9zLLBnGDXvdhHRMwAWzOkmwgEofvKVTgyqzb+Q== X-Google-Smtp-Source: AMrXdXtcnWsJO8ZKRcbJNSWxH+Y77FSptLg7E+6uJVLOHhlTS5zZrrwVhR1vakT89/lO4uK4qWIrKVfUcuxC6ix8PzQ= X-Received: by 2002:a67:f506:0:b0:3d3:c767:4570 with SMTP id u6-20020a67f506000000b003d3c7674570mr6365473vsn.85.1674863064282; Fri, 27 Jan 2023 15:44:24 -0800 (PST) MIME-Version: 1.0 References: <20230127224101.never.746-kees@kernel.org> In-Reply-To: <20230127224101.never.746-kees@kernel.org> From: Rob Herring Date: Fri, 27 Jan 2023 17:44:13 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] scripts/dtc: Replace 0-length arrays with flexible arrays To: Kees Cook Cc: Frank Rowand , devicetree@vger.kernel.org, "Gustavo A. R. Silva" , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 27, 2023 at 4:41 PM Kees Cook wrote: > > Replace the 0-length array with a C99 flexible array. Seen with GCC 13 > under -fstrict-flex-arrays: > > In file included from ../lib/fdt_ro.c:2: > ../lib/../scripts/dtc/libfdt/fdt_ro.c: In function 'fdt_get_name': > ../lib/../scripts/dtc/libfdt/fdt_ro.c:319:24: warning: 'strrchr' reading 1 or more bytes from a region of size 0 [-Wstringop-overread] > 319 | leaf = strrchr(nameptr, '/'); > | ^~~~~~~~~~~~~~~~~~~~~ > > Cc: Rob Herring > Cc: Frank Rowand > Cc: devicetree@vger.kernel.org > Signed-off-by: Kees Cook > --- > scripts/dtc/libfdt/fdt.h | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) Changes to dtc/libfdt go to upstream dtc first and then we sync them back. Rob