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[23.128.96.18]) by mx.google.com with ESMTP id r22si2259758eja.468.2020.10.16.11.46.55; Fri, 16 Oct 2020 11:47:18 -0700 (PDT) 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; dkim=pass header.i=@kernel-dk.20150623.gappssmtp.com header.s=20150623 header.b=Q44QOqng; 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 S2410093AbgJPP3O (ORCPT + 99 others); Fri, 16 Oct 2020 11:29:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405209AbgJPP3N (ORCPT ); Fri, 16 Oct 2020 11:29:13 -0400 Received: from mail-pj1-x1042.google.com (mail-pj1-x1042.google.com [IPv6:2607:f8b0:4864:20::1042]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4307C0613D4 for ; Fri, 16 Oct 2020 08:29:11 -0700 (PDT) Received: by mail-pj1-x1042.google.com with SMTP id a1so1718156pjd.1 for ; Fri, 16 Oct 2020 08:29:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=ATPJ8G5Rmg2jkq9+2I73bf4/KgUptQXil2wgPNMHeQk=; b=Q44QOqngKKJ/Zmzmj6EmNbdx8ZS2w3pCGWlQWQVYcPlSztZkmr/0S1llaVBI1hiDJB 1d6/uTZOJ4LAmH5oKWTI/3bgjb3zMQAzvIk0xgLmrnpD+BjG8muHCv4tZIhJtnq6Wpx2 hEzspvd1UFlDMse7XufdYo7lR3ph/OdbAEgupMV7hT4MtQWne11+S1qKp2XHW7MIoCkX ceQohpfd6pXkCn3eWKVA4gYr0KiYkyQCyrCvJ1fTNbr54ubMlx6gsjKJHGoL6IwP8Dgx bO2HY/c1FCDbBNNbTW1owULlU5Ys6+1FkAmDX1KgOrB6quRjz8QL7CrHE4l8e4iJEQv7 sUPw== 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=ATPJ8G5Rmg2jkq9+2I73bf4/KgUptQXil2wgPNMHeQk=; b=VwhFYpTd0gF6fGMlpXbyl2FcFzeQM97vwMExPqxwA16bXdcu7n268GjROP5i/sLM7q TQQevs8qyrXYxKgXp0LaxsfpotuJLONjnbtxF3LztxYGKXcHVKWIUZfMrZuGyyEAtRHd 2SpS532md3a5DxSCey2tY82TKQut4GezOIPxyvoZoSO3DQ7sPD3nYSo7fho4NJMjhpsP gHu9QcUXTHyMAeToCJ4+gMekU6k3JiMJe8Zz/gyrrqsC7KhMETydpp6k/wZf/43g4c8Z RKyr17h9GszOViGBmAIeOuCEa0gL+EPtcO0Aoj5VYkQJ+IkELyvLYktjXFzLb8kjCvYO rveQ== X-Gm-Message-State: AOAM532jjxEand9kXUmBARr4BkUxZnIncqc+2O4ZPcjOaMmfL9C5V7kr 3jEv+9+irj2EMJ/z1MuR7o58AwjGNVA/XRHF X-Received: by 2002:a17:902:c408:b029:d4:c99a:19e8 with SMTP id k8-20020a170902c408b02900d4c99a19e8mr4674795plk.8.1602862151187; Fri, 16 Oct 2020 08:29:11 -0700 (PDT) Received: from [192.168.1.134] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id q5sm3210581pfb.184.2020.10.16.08.29.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 16 Oct 2020 08:29:10 -0700 (PDT) Subject: Re: [PATCH] lightnvm: fix out-of-bounds write to array devices->info[] To: Colin King , Matias Bjorling , =?UTF-8?Q?Matias_Bj=c3=b8rling?= , linux-block@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org References: <20201016143351.677352-1-colin.king@canonical.com> From: Jens Axboe Message-ID: <36ff7b17-eb2f-780d-17ca-269a8f5d4aac@kernel.dk> Date: Fri, 16 Oct 2020 09:29:09 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201016143351.677352-1-colin.king@canonical.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/16/20 8:33 AM, Colin King wrote: > From: Colin Ian King > > There is an off-by-one array check that can lead to a out-of-bounds > write to devices->info[i]. Fix this by checking by using >= rather > than > for the size check. Also replace hard-coded array size limit > with ARRAY_SIZE on the array. Applied, thanks. -- Jens Axboe