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=-4.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 06772C433E2 for ; Mon, 13 Jul 2020 15:34:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB8D4206F0 for ; Mon, 13 Jul 2020 15:34:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729687AbgGMPeH (ORCPT ); Mon, 13 Jul 2020 11:34:07 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:36318 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729649AbgGMPeH (ORCPT ); Mon, 13 Jul 2020 11:34:07 -0400 Received: by mail-il1-f198.google.com with SMTP id t19so9738839ili.3 for ; Mon, 13 Jul 2020 08:34:06 -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=PuwK5sOU81rM/XoQcuJqMMPHQ+Gr8re6yhX7o7C4muQ=; b=GncOLDhZbdWgNkqboOKTfN1K3vHyOQ9oaaAUepxW+IDWthVrqLyk9lYLQcPbMFMoNk 8Isn3RGpcpllATlt+2PbLehhvvGmyOyRQNAvq8BapiRyfAUDfY5oJYw8U+80SmbLwvDD KJ93lMnbHCURe3M2dbAirT1fkjSGXCWdj6p6QqeaOMg7D0e97+4ZO6MRw5kTWi3eozvr oyvhPaLZf46lRtYttYQOvSZ5wyk1uA2yk2/lgv40SLlBY9WZ46rAd2hdWDyGO5W0ciVe IYrkkLfr7VBKcAEVrD5EPtIL1iVOd3P/hYtpeRpsytHJzq/+13PIvRdqzYpWgiseKbWT jWgA== X-Gm-Message-State: AOAM5311lc8n5xTykRmxCMR5WWsz7Id6TGtynFHsvDt1nEwdMeUkzue9 aZtng1MbuL2KuHEpv2NCYwQq7rtXQkylBPxdlAEwNkPALS8C X-Google-Smtp-Source: ABdhPJydbjbFEZskX61aECXgpw3Hf5lQrLPxhVEfS8LhGnBo3W5qg9pPTvobj6Hs8ic5kEJcDP2fXDOcy5fkMgW8HBxuPOvZeySr MIME-Version: 1.0 X-Received: by 2002:a92:1bd5:: with SMTP id f82mr225494ill.121.1594654446305; Mon, 13 Jul 2020 08:34:06 -0700 (PDT) Date: Mon, 13 Jul 2020 08:34:06 -0700 In-Reply-To: <0000000000001bbb6705aa49635a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cfc8ff05aa546b84@google.com> Subject: Re: KASAN: use-after-free Read in userfaultfd_release (2) From: syzbot To: Markus.Elfring@web.de, casey@schaufler-ca.com, dancol@google.com, hdanton@sina.com, jmorris@namei.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, stephen.smalley.work@gmail.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has bisected this bug to: commit d08ac70b1e0dc71ac2315007bcc3efb283b2eae4 Author: Daniel Colascione Date: Wed Apr 1 21:39:03 2020 +0000 Wire UFFD up to SELinux bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14a79d13100000 start commit: 89032636 Add linux-next specific files for 20200708 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=16a79d13100000 console output: https://syzkaller.appspot.com/x/log.txt?x=12a79d13100000 kernel config: https://syzkaller.appspot.com/x/.config?x=64a250ebabc6c320 dashboard link: https://syzkaller.appspot.com/bug?extid=75867c44841cb6373570 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c4c8db100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12cbb68f100000 Reported-by: syzbot+75867c44841cb6373570@syzkaller.appspotmail.com Fixes: d08ac70b1e0d ("Wire UFFD up to SELinux") For information about bisection process see: https://goo.gl/tpsmEJ#bisection