Received: by 2002:a05:6a10:f347:0:0:0:0 with SMTP id d7csp1230293pxu; Fri, 27 Nov 2020 02:54:22 -0800 (PST) X-Google-Smtp-Source: ABdhPJzdj+9JTjt26hrTL9xnd2vRbutqdhGJTvTLIMEmAsoptcKsib0/FY3cxv2pJ37UWvIIFJbr X-Received: by 2002:a17:906:180b:: with SMTP id v11mr7072143eje.41.1606474461860; Fri, 27 Nov 2020 02:54:21 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1606474461; cv=none; d=google.com; s=arc-20160816; b=j+7Iv9fCBt/zz8AbB7plJRYoifXkLpBUvbgSKiTsaceiEzUeNY1UqdToxDV5/9dbWH RCXLssWXvwWtpeAwcE1mBxwymLwcA5T7kpM//4JoUQCofdMIXGUjjGbMxCKg4zWZIASH 8Ot6Gw9Rb7jpL8oIU5OAmEADNwv8w3AOHAPz65XWbEUbvDSE5rJSACJG5Ve5qYONSP5o c4pqF2jBus5AKcm09ow5+cLxOjj/KqZYuuv9XYYUAnF1CFtALOXaOh7u2TWeU2VR9n5f I1l3eb2GLTP+tjDz1vGTboHFy1AqeE092rzKLDsB8SLwlOTqPr2JlP8X8V1eywkOJHHr nr0g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject; bh=ralRxzryLr7KxNRUQu8r6nduTQvxHIeUtMijHsr0OtA=; b=eWYF+QjD/d6u5u5bfDdB+pypP5xHy4o5zUJqkdWK/JW8wymRhBOyywkhSN6vgbRP06 CYub4aiJWM6pQWw1SbVfh5vRmjxR9buwm+Y5TPQ7xsO0Di9HoY+l9d/QTejPI0Dm6e6S Y6Sh0xKvEMBg/XqKcZmINY4aoUJBOuaBjslFGpsZ+JoJWa1FgGUPlAfJCf8SiZzyS1d2 uviP4WRRbwoZFWLazbjjw/qfbTLJLgin2qfBf49XTyTgDLt9x7jKe9hpZYheBXbreezQ ia+wcdjfLY5clgGMN9Fbz/Ob0wGpCaXSk2L8+gjWyd99IewQiMBfesS+/Y9qhLbyyAuh kfwg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id v11si1236346edx.226.2020.11.27.02.53.58; Fri, 27 Nov 2020 02:54:21 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728467AbgK0Kwn (ORCPT + 99 others); Fri, 27 Nov 2020 05:52:43 -0500 Received: from www262.sakura.ne.jp ([202.181.97.72]:61243 "EHLO www262.sakura.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725889AbgK0Kwn (ORCPT ); Fri, 27 Nov 2020 05:52:43 -0500 Received: from fsav110.sakura.ne.jp (fsav110.sakura.ne.jp [27.133.134.237]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 0ARAqF1s032568; Fri, 27 Nov 2020 19:52:15 +0900 (JST) (envelope-from penguin-kernel@i-love.sakura.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav110.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav110.sakura.ne.jp); Fri, 27 Nov 2020 19:52:15 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav110.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 0ARAqEiA032564 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Fri, 27 Nov 2020 19:52:14 +0900 (JST) (envelope-from penguin-kernel@i-love.sakura.ne.jp) Subject: Re: [PATCH] tomoyo: Avoid potential null pointer access To: Zheng Zengkai Cc: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, jmorris@namei.org, serge@hallyn.com, weiyongjun1@huawei.com References: <20201125121043.107662-1-zhengzengkai@huawei.com> <01d29bbf-9d77-c787-b2c2-d88a6a5047f7@huawei.com> <59e0abdd-88a9-6269-9cd1-0f65792784ec@i-love.sakura.ne.jp> From: Tetsuo Handa Message-ID: Date: Fri, 27 Nov 2020 19:52:13 +0900 User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/11/27 16:17, Zheng Zengkai wrote: > Hello Tetsuo, >> On 2020/11/26 15:33, Zheng Zengkai wrote: >>> As your say,  I found the function tomoyo_assign_namespace( ) >>> >>> in security/tomoyo/domain.c has the similar situation, >>> >>> Can I add __GFP_NOWARN for both and remove the null check for _entry_ in tomoyo_assign_namespace( )? >>> >> Good catch. Yes, please send as a patch. >> . > > I have resent a patch, thanks! > Applied to tomoyo-test1.git tree. Thank you. By the way, since some people automatically backport patches with Fixes: tag, I think we don't need to add Fixes: tag for patches like this one.