Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760707AbdLSBR7 (ORCPT ); Mon, 18 Dec 2017 20:17:59 -0500 Received: from mail-qt0-f195.google.com ([209.85.216.195]:41557 "EHLO mail-qt0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759630AbdLSBRz (ORCPT ); Mon, 18 Dec 2017 20:17:55 -0500 X-Google-Smtp-Source: ACJfBosKjgH4qsLylvemNY3It2A6O1b2TJPVETr2D7KdlzBr1moQiP0RbgvWX388EOHXLrcfgKowlw== Message-ID: <1513628274.1378.1.camel@gmail.com> Subject: Re: PROBLEM: NULL pointer dereference in kernel 4.14.6 From: George Amanakis To: linux-kernel@vger.kernel.org Cc: cgroups@vger.kernel.org Date: Mon, 18 Dec 2017 15:17:54 -0500 Content-Type: multipart/mixed; boundary="=-f4HSmTLRDTGv78JytkxV" X-Mailer: Evolution 3.26.3 Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4657 Lines: 79 --=-f4HSmTLRDTGv78JytkxV Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit I can replicate this on a Thinkpad X230i running archlinux with latest 4.14.7 kernel, without the ZFS modules. Steps to reproduce: 1) create a virtual machine using libvirt (attached xml) 2) virsh start vm 3) head /sys/fs/cgroup/unified/machine.slice/machine- qemu\\x2d2\\x2dvm.scope/cgroup.procs This hangs the laptop requiring a hard reset. 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