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=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 01E88C10F00 for ; Tue, 12 Mar 2019 03:59:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C904A214AE for ; Tue, 12 Mar 2019 03:59:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726973AbfCLD7B (ORCPT ); Mon, 11 Mar 2019 23:59:01 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:59323 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726008AbfCLD7B (ORCPT ); Mon, 11 Mar 2019 23:59:01 -0400 Received: by mail-it1-f198.google.com with SMTP id 9so1062518ita.8 for ; Mon, 11 Mar 2019 20:59:00 -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=Rg1C2aX0HyUdcFpVwU4EWVeEJy42p9kXBaO9Wh8/VOs=; b=XZDNkkwutIAN/Qt9ij64PgTtXDsgBxijsZtp6nKkk5AhUyLP78jsYBO+LDJF6KryxR i07jrbwHKlnzyT186EeRKJdBxULZ+i/oIJ8L/45JYHkRVuzouR6Al49F1Bdqt+JwD6CG jgqIFvgww9fmDakE6PlLeaRBzLbb5GHmzdd3agR8HvgGfTRq5FmpMEoVf9HMgBf7K7hQ whTii1W4bKyEx0nw+KajewmRhC4G718+BFMnGsOY+rX60J+buhhFpu949HqrDoqJUOPJ Ep+2IwibG4XwSpRnHae3+8UtNEreB6sf++Y6EWv54op+wyd4YNWti18LutbZDH531q0T kTxw== X-Gm-Message-State: APjAAAUPhkS3WthGHJCQejHTsb6JKWriVkbHS1sWM9oTpAK0LgpJFikr aRhOfHC3mbE331FR1sL+3iksA+OyTfDagivCzlq6UND81gVM X-Google-Smtp-Source: APXvYqwx9h7KDCPuvh+6fEd+XQtf2O1zRoUBFtwZYLOb127vefqqt6zi0UA2Qkz2LYFWcqyT1Fnl/+4tGtcpRf0Lowm6YM5gcQBt MIME-Version: 1.0 X-Received: by 2002:a24:6283:: with SMTP id d125mr833066itc.14.1552363140443; Mon, 11 Mar 2019 20:59:00 -0700 (PDT) Date: Mon, 11 Mar 2019 20:59:00 -0700 In-Reply-To: <00000000000010b2fc057fcdfaba@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008c75b50583ddb5f8@google.com> Subject: Re: INFO: rcu detected stall in sys_sendfile64 (2) From: syzbot To: airlied@linux.ie, akpm@linux-foundation.org, amir73il@gmail.com, chris@chris-wilson.co.uk, darrick.wong@oracle.com, david@fromorbit.com, dri-devel@lists.freedesktop.org, dvyukov@google.com, eparis@redhat.com, hannes@cmpxchg.org, hughd@google.com, intel-gfx@lists.freedesktop.org, jack@suse.cz, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, jrdr.linux@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mingo@redhat.com, mszeredi@redhat.com, penguin-kernel@I-love.SAKURA.ne.jp, peterz@infradead.org, rodrigo.vivi@intel.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, willy@infradead.org 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 34e07e42c55aeaa78e93b057a6664e2ecde3fadb Author: Chris Wilson Date: Thu Feb 8 10:54:48 2018 +0000 drm/i915: Add missing kerneldoc for 'ent' in i915_driver_init_early bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13220283200000 start commit: 34e07e42 drm/i915: Add missing kerneldoc for 'ent' in i915.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=10a20283200000 console output: https://syzkaller.appspot.com/x/log.txt?x=17220283200000 kernel config: https://syzkaller.appspot.com/x/.config?x=abc3dc9b7a900258 dashboard link: https://syzkaller.appspot.com/bug?extid=1505c80c74256c6118a5 userspace arch: amd64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c4dc28c00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15df4108c00000 Reported-by: syzbot+1505c80c74256c6118a5@syzkaller.appspotmail.com Fixes: 34e07e42 ("drm/i915: Add missing kerneldoc for 'ent' in i915_driver_init_early")