From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id nZEIORNRGltcAgAAmS7hNA ; Fri, 08 Jun 2018 09:50:27 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 46A00606FA; Fri, 8 Jun 2018 09:50:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.4 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, SORTED_RECIPS autolearn=no autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id 1694660275; Fri, 8 Jun 2018 09:50:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1694660275 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=iogearbox.net Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752724AbeFHJuY (ORCPT + 25 others); Fri, 8 Jun 2018 05:50:24 -0400 Received: from www62.your-server.de ([213.133.104.62]:39094 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751112AbeFHJuW (ORCPT ); Fri, 8 Jun 2018 05:50:22 -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 1fRE2D-0008Je-ME; Fri, 08 Jun 2018 11:50:17 +0200 Subject: Re: KASAN: null-ptr-deref Write in xdp_umem_unaccount_pages To: syzbot , bjorn.topel@intel.com, davem@davemloft.net, linux-kernel@vger.kernel.org, magnus.karlsson@intel.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <00000000000037bf29056e114a86@google.com> From: Daniel Borkmann Message-ID: <7459a2d0-011b-d439-bef2-cb0b4e574c4b@iogearbox.net> Date: Fri, 8 Jun 2018 11:50:17 +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: <00000000000037bf29056e114a86@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 06/07/2018 08:17 PM, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:    1c8c5a9d38f6 Merge git://git.kernel.org/pub/scm/linux/kern.. > git tree:       upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=13a72bdf800000 > kernel config:  https://syzkaller.appspot.com/x/.config?x=4f1acdf888c9d4e9 > dashboard link: https://syzkaller.appspot.com/bug?extid=979217770b09ebf5c407 > compiler:       gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=12aca2af800000 > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=161d4ddf800000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+979217770b09ebf5c407@syzkaller.appspotmail.com #syz fix: bpf, xdp: fix crash in xdp_umem_unaccount_pages