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=-20.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 15B40C433E0 for ; Thu, 25 Feb 2021 10:43:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9016C64E21 for ; Thu, 25 Feb 2021 10:43:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9016C64E21 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39956 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lFE6q-00089W-DJ for qemu-devel@archiver.kernel.org; Thu, 25 Feb 2021 05:43:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:48708) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lFE5y-0007Xh-OP for qemu-devel@nongnu.org; Thu, 25 Feb 2021 05:42:10 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:34744) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lFE5w-0007oZ-W7 for qemu-devel@nongnu.org; Thu, 25 Feb 2021 05:42:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614249728; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wLELNZ5FMw6J4z0iKytGOymiuDW68WgnsMFftjnmb3U=; b=bLCqwZLIgQPCnvOGuWtaiL53VCYuMkkqP7np44Tat1oG8ljR16qMs9bQbUSIglpiRZciQU /rFAD106kzRF9mT95NivTVOTOT62YGorh/Yvf/UYLXSc9r9pxFcc4e6bsFHL4AXXB5tF9w DuRQgJ6pyHFPyDxe+xcHheKKy00131Q= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-479-XDZLSWIYMJaCCoDpkck4cw-1; Thu, 25 Feb 2021 05:42:03 -0500 X-MC-Unique: XDZLSWIYMJaCCoDpkck4cw-1 Received: by mail-wr1-f69.google.com with SMTP id e29so2470029wra.12 for ; Thu, 25 Feb 2021 02:42:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=wLELNZ5FMw6J4z0iKytGOymiuDW68WgnsMFftjnmb3U=; b=B6LTBQO16LfcvWZxO/9tqgtecZ2zk34398KwxcOnt/d0b3hOcz/R9v56gAl5Kw5T/S Rc6UEgXEvbBZvGyMs8qvB7AE+EXG1fQM2NVjSQZk2e5CGw08tBVyRGcBnSJ+OB8SsGW0 URq6pnx+prMyJflzbN9xJ3eRUs2goS7GTNethnedIxg7zXrg75s7JPkRfqBysCbiK7nA 8AGBWsQYWqhnlkZLriYFMFhbCBTsNe7OkgQQ7MypUF+e8B9dZwd66N5YluZKy87Q3b+e hNiLKw4OYT7P6L1AXvzLvUoN1ffxM8nUBn19DWAg0Jy65NR2wg2Zj7kyjhqF9EbHnTKj ThKQ== X-Gm-Message-State: AOAM531SADW9SUVUJItbqeF/k8XcvKIjhJUqiWYVmOL4DhsnyHgH7cSS 76dxFGTj8XTp0uCF/Q1cg0PrBUkS5Kes2/bzACmyOOOuTkFohcOWtzpB1kc9W6xPwxsIKisnM+Y GJcAPBe/prJVrpCA= X-Received: by 2002:a7b:c956:: with SMTP id i22mr2670937wml.85.1614249722766; Thu, 25 Feb 2021 02:42:02 -0800 (PST) X-Google-Smtp-Source: ABdhPJxjHZny+md3A4rkmBqva8+hrRgJTToTSVwt8zHgw2dpZZvzOvM6kHDDFppl9gmd6MGX55E77g== X-Received: by 2002:a7b:c956:: with SMTP id i22mr2670929wml.85.1614249722656; Thu, 25 Feb 2021 02:42:02 -0800 (PST) Received: from [192.168.1.36] (68.red-83-57-175.dynamicip.rima-tde.net. [83.57.175.68]) by smtp.gmail.com with ESMTPSA id q140sm8013865wme.0.2021.02.25.02.42.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 25 Feb 2021 02:42:01 -0800 (PST) Subject: Re: [PATCH] qemu_fw_cfg: Make fw_cfg_rev_attr a proper kobj_attribute To: Nathan Chancellor , Gabriel Somlo , "Michael S. Tsirkin" References: <20210211194258.4137998-1-nathan@kernel.org> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: <6ac57db8-3866-297a-dc37-87c565b51ee2@redhat.com> Date: Thu, 25 Feb 2021 11:41:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <20210211194258.4137998-1-nathan@kernel.org> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Nick Desaulniers , qemu-devel@nongnu.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2/11/21 8:42 PM, Nathan Chancellor wrote: > fw_cfg_showrev() is called by an indirect call in kobj_attr_show(), > which violates clang's CFI checking because fw_cfg_showrev()'s second > parameter is 'struct attribute', whereas the ->show() member of 'struct > kobj_structure' expects the second parameter to be of type 'struct > kobj_attribute'. > > $ cat /sys/firmware/qemu_fw_cfg/rev > 3 > > $ dmesg | grep "CFI failure" > [ 26.016832] CFI failure (target: fw_cfg_showrev+0x0/0x8): > > Fix this by converting fw_cfg_rev_attr to 'struct kobj_attribute' where > this would have been caught automatically by the incompatible pointer > types compiler warning. Update fw_cfg_showrev() accordingly. > > Fixes: 75f3e8e47f38 ("firmware: introduce sysfs driver for QEMU's fw_cfg device") > Link: https://github.com/ClangBuiltLinux/linux/issues/1299 > Signed-off-by: Nathan Chancellor > --- > drivers/firmware/qemu_fw_cfg.c | 8 +++----- > 1 file changed, 3 insertions(+), 5 deletions(-) Reviewed-by: Philippe Mathieu-Daudé