From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pv50p00im-ztdg10012101.me.com (pv50p00im-ztdg10012101.me.com [17.58.6.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60EB812B6C for ; Fri, 23 Aug 2024 00:39:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=17.58.6.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724373547; cv=none; b=P3xtIm3nVU/9l4j1OLQdDGMfaeLjhSyl/ZCjKs0Jx/IQdvfwMsKvL75bPHxoV+YNJZ8O+jua7lY6nNZf5NcWQq2Hy1HAvPpZ5lF5XWJ/B92ar/+IKT9XqmOCT7D0UkXz8jp0XjKy1LhPR/L4s6ZFLOmv8eXVCAlr6S6FgomajPY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724373547; c=relaxed/simple; bh=/laXggx2klEzVGUGM2bjdt1/OHA2TkIhdeXgWoSgbPs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=AOurnNhrRFbsTxvaBKSEQATGhqyQuzMvtArVksMcaTFumj9hlgveWs1MkTzK7mV6epV0RKoLTbs82p6/7puiLf5zXn/0N67VcHP85kAxldMp1Dn3JLVlWlN4YpkJjktD5324nsodzxsLw4Bl1Z27P1wXld6tJP5ovA5ULg5FOEk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com; spf=pass smtp.mailfrom=icloud.com; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b=rkUTTEh+; arc=none smtp.client-ip=17.58.6.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=icloud.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b="rkUTTEh+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=icloud.com; s=1a1hai; t=1724373545; bh=B8wjtzR5qk15ePHAWKkx67BEkSWotpF/j+NOFA0Mw6s=; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; b=rkUTTEh+kDk22eiTdaTBxgSdeWBL42jhQzp0se1h1y9aM8MQeAy1SeiLEMLR2I9UC coVJARIQ4bIx2clH6lPqaTprQplVlpW4WltJoLFQDqanpZ5WYcoa54iHR+cPlfC3RB 8ZM/XIcljqbhJPsb9qUdhlKHYJRIK8iVbhZMAP7TZkjWtoty3t6bQHEJNat8DLoGQc zaW5UnCosAXhXuGLV3gtP4uSV2nLBBAXCaC8Ae6LMaXrgJd40KRvII2Dt7XknZxTwa CYmwdM/2LQW4qBMiUxhMGVMYEjn1C2ckeUl6W+Ldhv+F1EtJ6K48A/gUzn3pQi6zC/ X385NgLI+UdQQ== Received: from [192.168.1.26] (pv50p00im-dlb-asmtp-mailmevip.me.com [17.56.9.10]) by pv50p00im-ztdg10012101.me.com (Postfix) with ESMTPSA id 3C03E740227; Fri, 23 Aug 2024 00:39:01 +0000 (UTC) Message-ID: <1ba43657-2730-46eb-a6b9-8e316b35fa02@icloud.com> Date: Fri, 23 Aug 2024 08:38:35 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] driver core: Fix an uninitialized variable is used by __device_attach() To: Greg Kroah-Hartman Cc: "Rafael J. Wysocki" , Dmitry Torokhov , linux-kernel@vger.kernel.org, Zijun Hu , stable@vger.kernel.org References: <20240823-fix_have_async-v1-1-43a354b6614b@quicinc.com> <2024082315-capably-broiler-b4e6@gregkh> Content-Language: en-US From: Zijun Hu In-Reply-To: <2024082315-capably-broiler-b4e6@gregkh> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: akOgwyWebDOWsFbgyKp6U-MN65vhYBIz X-Proofpoint-GUID: akOgwyWebDOWsFbgyKp6U-MN65vhYBIz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-22_17,2024-08-22_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxlogscore=598 phishscore=0 clxscore=1015 mlxscore=0 malwarescore=0 suspectscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2308100000 definitions=main-2408230003 On 2024/8/23 08:14, Greg Kroah-Hartman wrote: > On Fri, Aug 23, 2024 at 07:46:09AM +0800, Zijun Hu wrote: >> From: Zijun Hu >> >> An uninitialized variable @data.have_async may be used as analyzed >> by the following inline comments: >> >> static int __device_attach(struct device *dev, bool allow_async) >> { >> // if @allow_async is true. >> >> ... >> struct device_attach_data data = { >> .dev = dev, >> .check_async = allow_async, >> .want_async = false, >> }; >> // @data.have_async is not initialized. > > As Dmitry said, this is incorrect, please fix your broken code analysis > tool, it is obviously not working properly :( > let us slow down firstly to confirm if what Dmitry said is right firstly. it is not related to any analysis tool, i notice it by reading code. > thanks, > > greg k-h