From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751972AbdGERn3 (ORCPT ); Wed, 5 Jul 2017 13:43:29 -0400 Received: from mail-oi0-f65.google.com ([209.85.218.65]:33053 "EHLO mail-oi0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751653AbdGERn2 (ORCPT ); Wed, 5 Jul 2017 13:43:28 -0400 MIME-Version: 1.0 In-Reply-To: <20170705165602.15005-1-mhocko@kernel.org> References: <20170705165602.15005-1-mhocko@kernel.org> From: Linus Torvalds Date: Wed, 5 Jul 2017 10:43:27 -0700 X-Google-Sender-Auth: AJyxXfjijFKwRlkkQz5pfW2Gl9w Message-ID: Subject: Re: [PATCH] mm: mm, mmap: do not blow on PROT_NONE MAP_FIXED holes in the stack To: Michal Hocko Cc: Andrew Morton , Vlastimil Babka , Ben Hutchings , Willy Tarreau , Oleg Nesterov , Rik van Riel , LKML , linux-mm , Michal Hocko Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 5, 2017 at 9:56 AM, Michal Hocko wrote: > > "mm: enlarge stack guard gap" has introduced a regression in some rust > and Java environments which are trying to implement their own stack > guard page. They are punching a new MAP_FIXED mapping inside the > existing stack Vma. Hmm. What version is this patch against? It doesn't seem to match my 4.12 tree. Linus From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f69.google.com (mail-oi0-f69.google.com [209.85.218.69]) by kanga.kvack.org (Postfix) with ESMTP id 9FF34680FBC for ; Wed, 5 Jul 2017 13:43:28 -0400 (EDT) Received: by mail-oi0-f69.google.com with SMTP id t188so16360274oih.15 for ; Wed, 05 Jul 2017 10:43:28 -0700 (PDT) Received: from mail-oi0-x243.google.com (mail-oi0-x243.google.com. [2607:f8b0:4003:c06::243]) by mx.google.com with ESMTPS id w10si10445894oib.31.2017.07.05.10.43.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 05 Jul 2017 10:43:27 -0700 (PDT) Received: by mail-oi0-x243.google.com with SMTP id f134so21369017oig.0 for ; Wed, 05 Jul 2017 10:43:27 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20170705165602.15005-1-mhocko@kernel.org> References: <20170705165602.15005-1-mhocko@kernel.org> From: Linus Torvalds Date: Wed, 5 Jul 2017 10:43:27 -0700 Message-ID: Subject: Re: [PATCH] mm: mm, mmap: do not blow on PROT_NONE MAP_FIXED holes in the stack Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: Andrew Morton , Vlastimil Babka , Ben Hutchings , Willy Tarreau , Oleg Nesterov , Rik van Riel , LKML , linux-mm , Michal Hocko On Wed, Jul 5, 2017 at 9:56 AM, Michal Hocko wrote: > > "mm: enlarge stack guard gap" has introduced a regression in some rust > and Java environments which are trying to implement their own stack > guard page. They are punching a new MAP_FIXED mapping inside the > existing stack Vma. Hmm. What version is this patch against? It doesn't seem to match my 4.12 tree. Linus -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org