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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 A7797C76195 for ; Sat, 20 Jul 2019 10:08:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4FA2F206DD for ; Sat, 20 Jul 2019 10:08:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4FA2F206DD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 78D826B0005; Sat, 20 Jul 2019 06:08:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 73D1A6B0006; Sat, 20 Jul 2019 06:08:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6536E8E0001; Sat, 20 Jul 2019 06:08:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by kanga.kvack.org (Postfix) with ESMTP id 4705A6B0005 for ; Sat, 20 Jul 2019 06:08:02 -0400 (EDT) Received: by mail-io1-f70.google.com with SMTP id f22so37447960ioj.9 for ; Sat, 20 Jul 2019 03:08:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:mime-version :date:in-reply-to:message-id:subject:from:to; bh=aIptGodPgqjQ+OCeW9XKeJdzrs6DHyh1FKeEsnaxVbM=; b=AzOrzT9vUTK6ltydCNdde6NcQ56J9jY47tfutX25Bn2MGnqXBivDFAyoaEbPthMbog SSPog3N/MtuzGPHF6YeVf7cI8z8g22ViXzmqcslZkRRs+1v3+G1/ltRbqimpQwrvbCo1 6qyOg1TxD60DKjzU/OJAuDaV/vJEhWPD+bZsyjTGAlj8oDOLcaNh7H5UFLQ+uXUt8sMK D4tyX67+I3pMnwz1YThgq8nGo0kBw41oXjCg2l4dTwZeHQn/7cSrifhHny1EAlelphL1 onJYmXMW5ixKNx04VERSICSkeDqPP5ooalc1AfJ4zIlZ4D4u0htLM30xWTx0gT+4xbbp C33Q== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3aogyxqkbais7dezp00t6p44xs.v33v0t97t6r328t28.r31@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3AOgyXQkbAIs7DEzp00t6p44xs.v33v0t97t6r328t28.r31@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Gm-Message-State: APjAAAXyWudMvG0KUzUcaScU+aWK9aQEevzYFcSpwmik3FF4qtPYLwKr LtOSyymL8up4wJEmV1MZDHy6Sv7CBsCVoOkYd8wmqzQ5WQYLonzZqHxI26vRe4heIh3Q+deY2G/ 8DoyyUuv8zL2Fy0HVNS/oIVjWTW+lfKCEo52GeO5S5sjeqPbtiRzK3zpVI6DUh0Q= X-Received: by 2002:a5d:9942:: with SMTP id v2mr22291714ios.177.1563617281940; Sat, 20 Jul 2019 03:08:01 -0700 (PDT) X-Received: by 2002:a5d:9942:: with SMTP id v2mr22291668ios.177.1563617281215; Sat, 20 Jul 2019 03:08:01 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563617281; cv=none; d=google.com; s=arc-20160816; b=y81GSYZPAr9PlokKEA1YalwW4Aq2JE1ZWCFN6TAGWDhy3AD55F5M3QwlMIT8ZL2875 Iydu0IaOHaZ2nNLr++stDsubetD45OjtrGslSVRyi4mhtsuH6OI7zDi+ObeK+7Pt01TT lfevBKjD9IGKJ/7zmUEaS/39u2q58iWT1a2alVqX6wDnMthQgOTjVdt2M72gSkJ5tM2v 4/QdAfBvNFtKhkaSd/Obxx4quF4pePKZDMpehYNMA4k3rsBJgBRS4uFUguzFUHdkSoxc wjwtwyOXCsbUgVl3Xs1++qrtr9SAMnBbszcLoy0gNTnrVIK4XG+IP+Own4ndj0zEf/A9 NFUQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=to:from:subject:message-id:in-reply-to:date:mime-version; bh=aIptGodPgqjQ+OCeW9XKeJdzrs6DHyh1FKeEsnaxVbM=; b=W3gPA2KGeULp4bv0m+orVNHLKJI5iucnYJY/88JnKR/9Od+Hk0bfdQrnk4t49eXCgi C+Uc8RwJA9lyrvpbcG/rlj7seVbIxz5tcHJMN4zN4lgLXzWtTUd5jEM5hggCyLaFF4cm YuRqLGjRx11qxnEeUR0kB5vME3DTD3+r3Ve6dfLG5r7hh3d9QmSdRWubMZ1hk8+25ill 6Uk0dNUxqTSH7unPqf3/JFqp/pOQNFSGVN6elaT4/c701vrbtVXGtKf2WnP4HlDHUVBh 17abp+tFF9y2meeBwIHB4Hqwg17s7GwZuUffa3uQyJGeL4gC9LgpjE946/julkvVb3+Y hjPQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of 3aogyxqkbais7dezp00t6p44xs.v33v0t97t6r328t28.r31@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3AOgyXQkbAIs7DEzp00t6p44xs.v33v0t97t6r328t28.r31@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from mail-sor-f69.google.com (mail-sor-f69.google.com. [209.85.220.69]) by mx.google.com with SMTPS id v16sor23624377ioj.130.2019.07.20.03.08.01 for (Google Transport Security); Sat, 20 Jul 2019 03:08:01 -0700 (PDT) Received-SPF: pass (google.com: domain of 3aogyxqkbais7dezp00t6p44xs.v33v0t97t6r328t28.r31@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3aogyxqkbais7dezp00t6p44xs.v33v0t97t6r328t28.r31@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3AOgyXQkbAIs7DEzp00t6p44xs.v33v0t97t6r328t28.r31@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Google-Smtp-Source: APXvYqxejQK5TJXgPG7zDzFOcVKgb6JtNNiEgaZkAwUZNQxIY+uT88/YtfjAsG3qEv0NnxidVHOC8aWEo8R9Py88FYjmq9+IoaCH 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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