Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752075AbdFUUab (ORCPT ); Wed, 21 Jun 2017 16:30:31 -0400 Received: from mail-io0-f180.google.com ([209.85.223.180]:35287 "EHLO mail-io0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751154AbdFUUaa (ORCPT ); Wed, 21 Jun 2017 16:30:30 -0400 MIME-Version: 1.0 In-Reply-To: <20170621202751.GA29638@redhat.com> References: <20170621023552.GB32082@yexl-desktop> <20170621193338.GA29222@redhat.com> <20170621202751.GA29638@redhat.com> From: Linus Torvalds Date: Wed, 21 Jun 2017 13:30:28 -0700 X-Google-Sender-Auth: DpU5vfbD96gDwADSnHxhL3ND8MY Message-ID: Subject: Re: [lkp-robot] [mm] 1be7107fbe: kernel_BUG_at_mm/mmap.c To: Oleg Nesterov Cc: Hugh Dickins , kernel test robot , Michal Hocko , LKML , LKP Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 379 Lines: 11 On Wed, Jun 21, 2017 at 1:27 PM, Oleg Nesterov wrote: > > Now __do_page_fault() tries to expand the stack itself, and this check > fails. But we want that check to trigger and cause the access to fail. Accessing the stack below the stack pointer is wrong. Do you have a pointer to the report for this regression? I must have missed it. Linus