From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:44030 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751548AbdERJfK (ORCPT ); Thu, 18 May 2017 05:35:10 -0400 Date: Thu, 18 May 2017 11:35:00 +0200 From: Greg KH To: Ben Pineau , Peter Zijlstra Cc: Ingo Molnar , stable@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Two sched patchs missing from 4.4-stable: inclusion possible? Message-ID: <20170518093500.GA20808@kroah.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: stable-owner@vger.kernel.org List-ID: On Thu, May 18, 2017 at 11:11:23AM +0200, Ben Pineau wrote: > Hello, > > The following two patches series, merged in mainline 4.7, was Cc'ed to stable@, > but somehow didn't made its way to the 4.4.x stable tree: > 754bd598be9bbc953bc709a9e8ed7f3188bfb9d7 > 094f469172e00d6ab0a3130b0e01c83b3cf3a98d > > Links to the discussions: > https://marc.info/?l=linux-kernel&m=146608185431676 > https://marc.info/?l=linux-kernel&m=146608184031673 > > This patch series address a real life issue, ie. we're seeing an > oopsing machine about every day on a kubernetes cluster, and > other users reported the same problem, for instance : > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687512 > https://github.com/kubernetes/kops/issues/874 > > Those two patches are also on their way for inclusion in the current > (4.4 based) LTS Ubuntu release : > https://code.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/xenial/+ref/master-next > > Could this series be considered for 4.4-stable inclusion by any chance ? > > For ref, the stacktrace I'm getting on an unpatched 4.4.67 kernel: > > [168797.975683] BUG: unable to handle kernel NULL pointer > dereference at 0000000000000050 > [168797.976656] Call Trace: > [168797.976656] [] pick_next_task_fair+0x75/0x4b0 > [168797.976656] [] __schedule+0x6c1/0x7f0 > [168797.976656] [] schedule+0x35/0x80 > [168797.976656] [] schedule_preempt_disabled+0xe/0x10 > [168797.976656] [] cpu_startup_entry+0x19a/0x360 > [168797.976656] [] start_secondary+0x160/0x1a0 > [168797.976656] RIP [] pick_next_entity+0x7f/0x160 Sure, I'll be glad to take them if I can get an ack from the patch authors, and reviewers (added to: and cc:)... Ingo and Peter, any objections? thanks, greg k-h