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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 4EDB2CA9EA0 for ; Tue, 22 Oct 2019 14:25:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2BC1F21906 for ; Tue, 22 Oct 2019 14:25:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726955AbfJVOZd (ORCPT ); Tue, 22 Oct 2019 10:25:33 -0400 Received: from www62.your-server.de ([213.133.104.62]:43736 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725887AbfJVOZd (ORCPT ); Tue, 22 Oct 2019 10:25:33 -0400 Received: from sslproxy05.your-server.de ([78.46.172.2]) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1iMv6C-0003zB-Dh; Tue, 22 Oct 2019 16:25:24 +0200 Received: from [178.197.249.13] (helo=pc-63.home) by sslproxy05.your-server.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1iMv6C-000NS0-0T; Tue, 22 Oct 2019 16:25:24 +0200 Subject: Re: KASAN: use-after-free Read in is_bpf_text_address To: syzbot , ast@kernel.org, bpf@vger.kernel.org, davem@davemloft.net, hawk@kernel.org, jakub.kicinski@netronome.com, john.fastabend@gmail.com, kafai@fb.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com References: <000000000000da1dfc0595801e46@google.com> From: Daniel Borkmann Message-ID: <32ff9867-ceeb-de21-afca-70eeb8282e89@iogearbox.net> Date: Tue, 22 Oct 2019 16:25:22 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <000000000000da1dfc0595801e46@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.101.4/25610/Tue Oct 22 10:54:26 2019) Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On 10/22/19 3:53 PM, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:    4fe34d61 Merge branch 'x86-urgent-for-linus' of git://git... > git tree:       upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=15b01a60e00000 > kernel config:  https://syzkaller.appspot.com/x/.config?x=f0a8b0a0736a2ac1 > dashboard link: https://syzkaller.appspot.com/bug?extid=0cd01c9e0f5cd37a357e > compiler:       clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=161f89f7600000 > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16e2d0f8e00000 Fixed by (also just checked via syz test): https://patchwork.ozlabs.org/patch/1181358/ Thanks, Daniel