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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 CFC86C35246 for ; Sat, 1 Feb 2020 17:08:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A7614206F0 for ; Sat, 1 Feb 2020 17:08:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726877AbgBARIE (ORCPT ); Sat, 1 Feb 2020 12:08:04 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:36266 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726643AbgBARIE (ORCPT ); Sat, 1 Feb 2020 12:08:04 -0500 Received: by mail-il1-f197.google.com with SMTP id d22so8146715ild.3 for ; Sat, 01 Feb 2020 09:08:02 -0800 (PST) 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=tymJqtHu6iGLng33McHVxrI0IJhfSzLoBxSmgMc7RDs=; b=QOcyimo8+lujx7CYl/st6pOXy0zRv+jVtY3wNp4gC157pLMAAwZnOF+vfnsPZbicTV ZKmEic1/evGDZkws8gWRaTOx+E5qXHZIw4OwJZgoXzF+cRxZ0DPS+q92d8HeXd6IBU4c hoetdNBlnWswLnEXNmVTYKzZ9Clm1v3+vO5O09gnKVIJQo+geQSI1x0qjG5xm2wLeuhE ysOUZjC6Muno8FKdeZU2vFH37E1KMF/asTp7x89v+HQEqrFypV9hzuh/gfLRmjNcZNQt Pt+RrsQM38GSfhJfCw02KW1jPizS9eGuKgO2LPx36/fJtnj7agEDiFWoxYBMBkH7ffYe NS7Q== X-Gm-Message-State: APjAAAWh7D/3cnl4VIsQ2QDxBSRYhqM6fY9e/I88zctyi+P2TnB5eaRk Lf+HaQ0Th/41TekqKc12+qQsNEmMlVHtkw1OosC0gjAWPkyO X-Google-Smtp-Source: APXvYqwepjCYJGI2J8ce5amIo8ruFAk8py8FuCjyu9SckBqGRIYGuJ+otdYXZhBwXMfqF4VWM3BgDWyoXjY1iNw3hTcQzL5vQlyt MIME-Version: 1.0 X-Received: by 2002:a6b:b8c1:: with SMTP id i184mr9146827iof.68.1580576882237; Sat, 01 Feb 2020 09:08:02 -0800 (PST) Date: Sat, 01 Feb 2020 09:08:02 -0800 In-Reply-To: <000000000000b926cf059d7c6552@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009b26dc059d86bb54@google.com> Subject: Re: general protection fault in path_openat From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, 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 d0cb50185ae942b03c4327be322055d622dc79f6 Author: Al Viro Date: Sun Jan 26 14:29:34 2020 +0000 do_last(): fetch directory ->i_mode and ->i_uid before it's too late bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16a8d8b5e00000 start commit: ccaaaf6f Merge tag 'mpx-for-linus' of git://git.kernel.org.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=15a8d8b5e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11a8d8b5e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=879390c6b09ccf66 dashboard link: https://syzkaller.appspot.com/bug?extid=190005201ced78a74ad6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1674c776e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1565e101e00000 Reported-by: syzbot+190005201ced78a74ad6@syzkaller.appspotmail.com Fixes: d0cb50185ae9 ("do_last(): fetch directory ->i_mode and ->i_uid before it's too late") For information about bisection process see: https://goo.gl/tpsmEJ#bisection