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[209.132.180.67]) by mx.google.com with ESMTP id d7si4297323plr.18.2019.07.20.11.41.57; Sat, 20 Jul 2019 11:42:13 -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; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727721AbfGTKIC (ORCPT + 99 others); Sat, 20 Jul 2019 06:08:02 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:48927 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727710AbfGTKIB (ORCPT ); Sat, 20 Jul 2019 06:08:01 -0400 Received: by mail-io1-f71.google.com with SMTP id z19so37495516ioi.15 for ; Sat, 20 Jul 2019 03:08:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=aIptGodPgqjQ+OCeW9XKeJdzrs6DHyh1FKeEsnaxVbM=; b=Auwlc+2P0DZGrG9j93l/jQ3jmDjhtvzb/cdAWfniq6+8CczLt2OBvI1SwWvQkk4wN1 SjL2lliJBCmeuk0AV1zgrLZPagRMIsF290OgUDgJNJD/GJaW8ujH3txKeTgb/hEjbrc3 iG9ekX2TDIpI36HjBw5Je1DbJUY41tj4TdbYmAyH+/5h5628JTZZTpBVSZWj+vN6TB1A mfEkgGRDshJFtzsSIt76hrB+5HVj0fe4Zkkhfv5p/9s3mU8Rbmw/vpJry7QIYvwpBbwO yIfP8HAt+jUOHNPUoC+QxycgrZYpqco/pcTbudy27sqHwCIXuAHDh7KCrfeCjMaqeXAP HtuQ== X-Gm-Message-State: APjAAAXE5zUmypy+nhDAIVShjkqjhRV2IX+uADxnQtFszp4tGivBdKXC boJShjmxc4R8hKzEdqk40MP1ub0fZYXUtOs0ppmqnzaiKoG5 MIME-Version: 1.0 X-Received: by 2002:a6b:f90f:: with SMTP id j15mr48006883iog.43.1563617280803; Sat, 20 Jul 2019 03:08:00 -0700 (PDT) Date: Sat, 20 Jul 2019 03:08:00 -0700 In-Reply-To: <0000000000008dd6bb058e006938@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000964b0d058e1a0483@google.com> Subject: Re: WARNING in __mmdrop From: syzbot To: aarcange@redhat.com, akpm@linux-foundation.org, christian@brauner.io, davem@davemloft.net, ebiederm@xmission.com, elena.reshetova@intel.com, guro@fb.com, hch@infradead.org, james.bottomley@hansenpartnership.com, jasowang@redhat.com, jglisse@redhat.com, keescook@chromium.org, ldv@altlinux.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-parisc@vger.kernel.org, luto@amacapital.net, mhocko@suse.com, mingo@kernel.org, mst@redhat.com, namit@vmware.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, wad@chromium.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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=149a8a20600000 start commit: 6d21a41b Add linux-next specific files for 20190718 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=169a8a20600000 console output: https://syzkaller.appspot.com/x/log.txt?x=129a8a20600000 kernel config: https://syzkaller.appspot.com/x/.config?x=3430a151e1452331 dashboard link: https://syzkaller.appspot.com/bug?extid=e58112d71f77113ddb7b syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10139e68600000 Reported-by: syzbot+e58112d71f77113ddb7b@syzkaller.appspotmail.com Fixes: 7f466032dc9e ("vhost: access vq metadata through kernel virtual address") For information about bisection process see: https://goo.gl/tpsmEJ#bisection