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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 20E85C10F06 for ; Mon, 11 Mar 2019 13:14:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2A5720657 for ; Mon, 11 Mar 2019 13:14:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727426AbfCKNOB (ORCPT ); Mon, 11 Mar 2019 09:14:01 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:36261 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726872AbfCKNOB (ORCPT ); Mon, 11 Mar 2019 09:14:01 -0400 Received: by mail-it1-f198.google.com with SMTP id i4so5023374itb.1 for ; Mon, 11 Mar 2019 06:14:01 -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=RaNsRi5JHqh666hDwO9MIinlpT7YX8R/dBqSEIdUVQo=; b=EmXjO4r3jcDQEbdrrc0kevtM3tgOmNdGoVH+9+1a1DHTLRgnnIj3JRSL4TamCGXhgn XGjCCnn4zhXj13kS39TeVijg/xnlo9wNy7U2ukY6793kEz0/JB2bWRAYjwlzxlJs5b+1 8LXHTQaGiucT2KCjEl5ZMHQmeVoTYrbZEoSnZg6EbJct6/dgOHF3wciu5ERdvYJMP0Fa h+ws6WNrePdjhEknnkShJ6KGCHIf8dAsa6vOkmiWGpSIfUcL6pL8YbPI9003eUACe1Xo lp7nf0NqDIhvb1f7oVig8z0Bx/ZVw7iYxWW/x/qUyMS2wG9bD9dxaAN+Qco/GesQ7jW0 x89g== X-Gm-Message-State: APjAAAUy400eouBFLyGOeTpxpVm2XPHf2LMXR2rr4/VcT6uyCv3efTDX qTlGiJ2vk7cfh141FnoDtg5HGIBwnql70owQqAXJlfWpv6ol X-Google-Smtp-Source: APXvYqyI/6oMjijPfRgKODq444vyjAn1ZAQIoLLW4LLP0dL9Zw5DgAIoakLOOqq/+px31yVhWr+jClJ/cnm86/9BJ8tkWaJUyAoh MIME-Version: 1.0 X-Received: by 2002:a24:4394:: with SMTP id s142mr21247279itb.40.1552310040735; Mon, 11 Mar 2019 06:14:00 -0700 (PDT) Date: Mon, 11 Mar 2019 06:14:00 -0700 In-Reply-To: <000000000000d8bec0057eec0a92@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008f34570583d15823@google.com> Subject: Re: WARNING in ep_poll_callback From: syzbot To: akpm@linux-foundation.org, dbueso@suse.de, dvyukov@google.com, jbaron@akamai.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, paulmck@linux.vnet.ibm.com, rpenyaev@suse.de, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk 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 f92cacf118171208f62519d92502a8dd0341286d Author: Roman Penyaev Date: Tue Jan 8 01:15:44 2019 +0000 epoll: loosen irq safety in ep_poll_callback() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=107ae15f200000 start commit: f92cacf1 epoll: loosen irq safety in ep_poll_callback() git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=127ae15f200000 console output: https://syzkaller.appspot.com/x/log.txt?x=147ae15f200000 kernel config: https://syzkaller.appspot.com/x/.config?x=1521b074ff5a5bdf dashboard link: https://syzkaller.appspot.com/bug?extid=aea82bf9ee6ffd9a79d9 userspace arch: amd64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1776034b400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c2e580c00000 Reported-by: syzbot+aea82bf9ee6ffd9a79d9@syzkaller.appspotmail.com Fixes: f92cacf1 ("epoll: loosen irq safety in ep_poll_callback()")