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 9ED20C7618B for ; Wed, 24 Jul 2019 07:07:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A728217F4 for ; Wed, 24 Jul 2019 07:07:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726108AbfGXHHp (ORCPT ); Wed, 24 Jul 2019 03:07:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:15105 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726107AbfGXHHo (ORCPT ); Wed, 24 Jul 2019 03:07:44 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7E16030832EA; Wed, 24 Jul 2019 07:07:44 +0000 (UTC) Received: from [10.72.12.106] (ovpn-12-106.pek2.redhat.com [10.72.12.106]) by smtp.corp.redhat.com (Postfix) with ESMTP id 59983608A5; Wed, 24 Jul 2019 07:07:38 +0000 (UTC) Subject: Re: KASAN: use-after-free Write in tlb_finish_mmu To: syzbot , aarcange@redhat.com, davem@davemloft.net, hch@infradead.org, james.bottomley@hansenpartnership.com, jglisse@redhat.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-parisc@vger.kernel.org, mst@redhat.com, syzkaller-bugs@googlegroups.com References: <0000000000002c183d058e0e3abd@google.com> From: Jason Wang Message-ID: Date: Wed, 24 Jul 2019 15:07:35 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <0000000000002c183d058e0e3abd@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Wed, 24 Jul 2019 07:07:44 +0000 (UTC) Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On 2019/7/20 上午4:04, syzbot wrote: > syzbot has bisected this bug to: > > commit 7f466032dc9e5a61217f22ea34b2df932786bbfc > Author: Jason Wang > Date:   Fri May 24 08:12:18 2019 +0000 > >     vhost: access vq metadata through kernel virtual address > > bisection log: > https://syzkaller.appspot.com/x/bisect.txt?x=11642a58600000 > start commit:   22051d9c Merge tag 'platform-drivers-x86-v5.3-2' of > git://.. > git tree:       upstream > final crash: https://syzkaller.appspot.com/x/report.txt?x=13642a58600000 > console output: https://syzkaller.appspot.com/x/log.txt?x=15642a58600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d831b9cbe82e79e4 > dashboard link: > https://syzkaller.appspot.com/bug?extid=8267e9af795434ffadad > userspace arch: i386 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10d58784600000 > > Reported-by: syzbot+8267e9af795434ffadad@syzkaller.appspotmail.com > Fixes: 7f466032dc9e ("vhost: access vq metadata through kernel virtual > address") > > For information about bisection process see: > https://goo.gl/tpsmEJ#bisection #syz dup: WARNING in __mmdrop