Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751144AbdFTCyE (ORCPT ); Mon, 19 Jun 2017 22:54:04 -0400 Received: from scorn.kernelslacker.org ([45.56.101.199]:55826 "EHLO scorn.kernelslacker.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750985AbdFTCyD (ORCPT ); Mon, 19 Jun 2017 22:54:03 -0400 Date: Mon, 19 Jun 2017 22:52:59 -0400 From: Dave Jones To: Linus Torvalds Cc: Linux Kernel Mailing List , Hugh Dickins , Oleg Nesterov , Michal Hocko Subject: Re: Linux 4.12-rc6 Message-ID: <20170620025259.e7zxtsv4iltbuu6i@codemonkey.org.uk> Mail-Followup-To: Dave Jones , Linus Torvalds , Linux Kernel Mailing List , Hugh Dickins , Oleg Nesterov , Michal Hocko References: <20170620002612.bwjphlk2qz3ynghl@codemonkey.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170306 (1.8.0) X-Spam-Note: SpamAssassin invocation failed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1179 Lines: 27 On Tue, Jun 20, 2017 at 10:32:00AM +0800, Linus Torvalds wrote: > On Tue, Jun 20, 2017 at 8:26 AM, Dave Jones wrote: > > > Hugh Dickins (1): > > > mm: larger stack guard gap, between vmas > > > > This seems to be buggered. > > > > 002331 00000396712307 0 2 kernel BUG at mm/mmap.c:1963! > > 002332 00000396712414 0 4 invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC > > 002333 00000396712541 0 4 CPU: 0 PID: 4572 Comm: trinity-c41 Not tainted 4.12.0-rc6-think+ #1 > > 002336 00000396712959 0 4 RIP: 0010:unmapped_area_topdown+0xa5/0x170 > > Dave, do you have instructions for Hugh to recreate that with trinity > (or perhaps some way to generate a test-case from trinity?). Or does > it trigger easily by just running trinity? trinity -c mmap hits it instantly for me. I'm using latest -git version, but afair, even the older versions would hit this. > I'm in China right now, and will be traveling again this afternoon, so > I probably can't look at it myself until later, but hopefully Hugh has > the cycles to follow up in it.. I'll figure out the exact params in the morning if no-one has it figured out overnight. Dave