Received: by 2002:ac0:a5b6:0:0:0:0:0 with SMTP id m51-v6csp643646imm; Fri, 8 Jun 2018 02:55:10 -0700 (PDT) X-Google-Smtp-Source: ADUXVKJW4JgWm10ao+rL1lMJ+gILKv2ChOwol2c5RMMKUGJqKHFK+/4r6VqXh6hzMbgIIaRkhhEN X-Received: by 2002:a62:8d5:: with SMTP id 82-v6mr5387072pfi.154.1528451710014; Fri, 08 Jun 2018 02:55:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1528451709; cv=none; d=google.com; s=arc-20160816; b=n8s+CioyKuHjGynSxp1OAQkm3FVQRlHRG1s9lxqKcJ1s4FzKn+QNbryOiyXM5xcH4T Qc0Hc/8eMJJhBFZphqSHs+V5GJVouppLALZbissEHzADDSVQC1soWnCNaGVLMciMLDzb H64EUPDlhu+br9jPVVv2v68+GpQXwPykt7vC8m4UTF77Ky7HTljyucX0DihO/Neamaty 7Lul0wrsNHIC1SS2oO/BLHtf/s9Dc4IM+0UZeLb3cwinuLhxBTSgIzDmwmOrq85mnp7G a0XRY24ajyTqfaQCN/QBu+qjz1Bp9nYhVywmlaWaxxYtia8g8UZhx3t3nfD5UotAk16V FQ5w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:to:subject:arc-authentication-results; bh=2agyS4GuqeZNv8vli9PuU44XhFqh7AHsq3BinJtgSHA=; b=mOD6N1iAnpJgL0ielXGzXffVF0RnHtUNqikw51tBOrnXF23/Aiv+q/cPYCfq+BuSqE ygRqK9emRhKdpTbe6O6FHu3OzhuVW6dz+79fQVxOYjUmlCcKJoIQL9h1zliuTcNxLJn3 rIukr0mIb5YfMNsFnUSTHipOhaDbC6fmK/q8GiFFuzo++mDKNJFq8WJ/UOxgjOKqiPZC fcXgtJIyBdHtLuVtWEWYMFuJ4dcoiqAuHyNQAxtU+1YOMJuoSqTwICf9QZrj+IGM6T5p K5gFXWA5MtRwMpZ/wqsSbARRtZOQyFStVbf0/4XDytMGBsIfAMeaqpP6h4rK7k4DmQJR XjGg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id k2-v6si10985124pgr.206.2018.06.08.02.54.55; Fri, 08 Jun 2018 02:55:09 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752977AbeFHJx6 (ORCPT + 99 others); Fri, 8 Jun 2018 05:53:58 -0400 Received: from www62.your-server.de ([213.133.104.62]:39453 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751523AbeFHJx5 (ORCPT ); Fri, 8 Jun 2018 05:53:57 -0400 Received: from [178.197.248.12] (helo=linux.home) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-SHA:256) (Exim 4.85_2) (envelope-from ) id 1fRE5i-0008Uz-BD; Fri, 08 Jun 2018 11:53:54 +0200 Subject: Re: KASAN: slab-out-of-bounds Read in bpf_csum_update To: syzbot , ast@kernel.org, davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000b2a7ea056dc54779@google.com> From: Daniel Borkmann Message-ID: <3b5752b9-8a84-f053-93db-49ddcf4f02e7@iogearbox.net> Date: Fri, 8 Jun 2018 11:53:53 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <000000000000b2a7ea056dc54779@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.99.3/24643/Fri Jun 8 06:37:57 2018) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/04/2018 01:36 AM, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:    0512e0134582 Merge tag 'xfs-4.17-fixes-3' of git://git.ker.. > git tree:       upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17eb2d7b800000 > kernel config:  https://syzkaller.appspot.com/x/.config?x=968b0b23c7854c0b > dashboard link: https://syzkaller.appspot.com/bug?extid=efae31b384d5badbd620 > compiler:       gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=162c6def800000 > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14fe3db7800000 #syz fix: bpf: reject passing modified ctx to helper functions