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 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 E21A1C432C0 for ; Wed, 20 Nov 2019 19:52:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C3EA320726 for ; Wed, 20 Nov 2019 19:52:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727530AbfKTTwE (ORCPT ); Wed, 20 Nov 2019 14:52:04 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:51259 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726440AbfKTTwD (ORCPT ); Wed, 20 Nov 2019 14:52:03 -0500 Received: by mail-il1-f197.google.com with SMTP id x2so622317ilk.18 for ; Wed, 20 Nov 2019 11:52:01 -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=XhBRlgTYSsBApDath+tcXSTGDYeEdj9JFcoeoXzALkc=; b=l9wf2vEp6vtjKooQ2+FBvWXOboPbn5ph43syOeHVt7AStz34V2QkPAtfw/PSXOIpgG IN/bCTRVZE5e2zF2mBQv7YPVCAKIpS7iKZdxzBtCQqtKbcVGVeNV9Q/3p4ckTtLp3/IJ /YzDDXoIGdlg9gYNuYWwp6ydlCTwlJQLDWYhuGcZD3EAkOmN3KevWw6uAIlGgxr3xAzm TjSkCEKkZwMHjAsjxHu51oAi47tWkvdlkLZEU0mWTT/hCyqfiuu3oyCCIK8fW5BkwnNy beIeqw5mzO6I6wdvcuZJSRZbeAFW7ZY2jmqxIh6VROfXxBabqdxQiQ0vD0QmNtYAOKUW nhLQ== X-Gm-Message-State: APjAAAUfwrRbVEjlulvXraj0rc7VaqwefgF4UhvF//7IiO+rX9TOX8wM zh/0nAELtcDWgL4rfiDbl+knrSyIX/FWGEB+u6PtgqUN5Oxa X-Google-Smtp-Source: APXvYqw3+A+07brQWjAPceJpRxuwfPPco+IwB2wmSin7utykaTY7p8Bz5xO7eX7AKCM3IovDSsUHEzwIE7wdHi9CUYsqWNMP16eD MIME-Version: 1.0 X-Received: by 2002:a92:3b9a:: with SMTP id n26mr5774182ilh.82.1574279521405; Wed, 20 Nov 2019 11:52:01 -0800 (PST) Date: Wed, 20 Nov 2019 11:52:01 -0800 In-Reply-To: <0000000000006e31980579315914@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a6993c0597cc8375@google.com> Subject: Re: INFO: task hung in __do_page_fault (2) From: syzbot To: acme@kernel.org, akpm@linux-foundation.org, arnd@arndb.de, corbet@lwn.net, ebiederm@xmission.com, keescook@chromium.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux@dominikbrodowski.net, luto@kernel.org, mcgrof@kernel.org, mingo@redhat.com, peterz@infradead.org, sudipm.mukherjee@gmail.com, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org syzbot has bisected this bug to: commit 0161028b7c8aebef64194d3d73e43bc3b53b5c66 Author: Andy Lutomirski Date: Mon May 9 22:48:51 2016 +0000 perf/core: Change the default paranoia level to 2 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15910e86e00000 start commit: 18d0eae3 Merge tag 'char-misc-4.20-rc1' of git://git.kerne.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=17910e86e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13910e86e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=342f43de913c81b9 dashboard link: https://syzkaller.appspot.com/bug?extid=6b074f741adbd93d2df5 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12482713400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158fd4a3400000 Reported-by: syzbot+6b074f741adbd93d2df5@syzkaller.appspotmail.com Fixes: 0161028b7c8a ("perf/core: Change the default paranoia level to 2") For information about bisection process see: https://goo.gl/tpsmEJ#bisection