From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752573AbbE1HDp (ORCPT ); Thu, 28 May 2015 03:03:45 -0400 Received: from mail.siteground.com ([67.19.240.234]:45279 "EHLO mail.siteground.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751122AbbE1HDh (ORCPT ); Thu, 28 May 2015 03:03:37 -0400 Message-ID: <5566BDC4.4020909@kyup.com> Date: Thu, 28 May 2015 10:03:32 +0300 From: Nikolay Borisov Organization: Kyup Ltd. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: "Eric W. Biederman" , Josh Boyer CC: Alexander Larsson , containers@lists.linux-foundation.org, "Linux-Kernel@Vger. Kernel. Org" Subject: Re: Kernel panic with user namespaces References: <1431959951.5030.2.camel@redhat.com> <1432642765.19400.2.camel@redhat.com> <87vbff1es3.fsf@x220.int.ebiederm.org> <87pp5mqce9.fsf@x220.int.ebiederm.org> In-Reply-To: <87pp5mqce9.fsf@x220.int.ebiederm.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mail.siteground.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - kyup.com X-Get-Message-Sender-Via: mail.siteground.com: none X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I've run the attached test case on a clean 4.0 and 4.0 + the patch you referenced but in neither cases could I crash the kernel. All that was happening was for a new namespace to be created and bash executed in it and after some seconds I get logged out of the machine. But then I can log-in back and the kernel hasn't crashed. Regards, Nikolay On 05/27/2015 06:16 PM, Eric W. Biederman wrote: > Josh Boyer writes: > >> On Tue, May 26, 2015 at 12:31 PM, Eric W. Biederman >> wrote: >>> Alexander Larsson writes: >>> >>>> On mån, 2015-05-18 at 16:39 +0200, Alexander Larsson wrote: >>>> >>>> Didn't get any replies to the below kernel panic (testcase attached), >>>> which seems rather important to fix. Reposting to a wider audience. >>> >>> Buggered backport greg already has the fix somewhere in his queue. >> >> Is it fs_pin-allow-for-the-possibility-that-m_list-or-s_list-go-unused.patch >> or mnt-fail-collect_mounts-when-applied-to-unmounted-mounts.patch ? >> (Or both I guess.) Those are the only 2 patches queued for 4.0 stable >> right now. > > Both fix the buggered backport. > > fs_pin-allow-for-the-possibility-that-m_list-or-s_list-go-unused.patch > fixes the crash. > > Eric > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >