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,URIBL_BLOCKED autolearn=ham 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 B138AC43381 for ; Mon, 11 Mar 2019 13:14:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 84ECB2084F for ; Mon, 11 Mar 2019 13:14:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727355AbfCKNOB (ORCPT ); Mon, 11 Mar 2019 09:14:01 -0400 Received: from mail-it1-f199.google.com ([209.85.166.199]:59401 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725943AbfCKNOB (ORCPT ); Mon, 11 Mar 2019 09:14:01 -0400 Received: by mail-it1-f199.google.com with SMTP id q192so4935588itb.9 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=GrUs3QRFMjjZmUSkgwj058h/bO9HMwR6kCt3pii/sJM2uIIpqbSKzTScqSGndnuPdR VKoVCCFDlBXYWRKt6lK4CluQ39Lr0/h9AZD8FThOwFtt2AM9lNCcloA3x3zP9drD1KDu eC1ckAv1AJ0JkoGIfOTQoTlDOjDzdfQ4CTlZhjOyu/x14X+W55IdEwYnYTCAe1+Ew4dy KLITHeQBNZTQj/UO5J623nrkV25F2MTKE2U0ReND9Tpo5Bc5ul3PA1lrTajiGeNq4DMi phIEyL+h7e80giPeD680UJynzEJM910B0OgWKQZwtSrg/jsEG7D5L7DWjShwoVucr/Op GmVw== X-Gm-Message-State: APjAAAUBJOg3DF4Kbpxh/Lr41yH7r4ihyy6h4KJrLxZOJLOjhISAYNTo ijNj8zxdNTZe8NoSvCmOF8MGEQkvWdolYOm7EqySpM74VPTE 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-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@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()")