From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f198.google.com (mail-wr0-f198.google.com [209.85.128.198]) by kanga.kvack.org (Postfix) with ESMTP id AFDB46B0006 for ; Fri, 2 Mar 2018 08:24:24 -0500 (EST) Received: by mail-wr0-f198.google.com with SMTP id h33so6344781wrh.10 for ; Fri, 02 Mar 2018 05:24:24 -0800 (PST) Received: from huawei.com (lhrrgout.huawei.com. [194.213.3.17]) by mx.google.com with ESMTPS id i3si4736343wrb.229.2018.03.02.05.24.23 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 02 Mar 2018 05:24:23 -0800 (PST) Subject: Re: [Question PATCH 0/1] mm: crash in vmalloc_to_page - misuse or bug? References: <20180222141324.5696-1-igor.stoppa@huawei.com> From: Igor Stoppa Message-ID: <921e8bb3-3c4d-be75-3029-35fde00087c7@huawei.com> Date: Fri, 2 Mar 2018 15:23:45 +0200 MIME-Version: 1.0 In-Reply-To: <20180222141324.5696-1-igor.stoppa@huawei.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: mhocko@kernel.org Cc: willy@infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Ping? The kernel test automation seems to confirm my findings: https://marc.info/?l=linux-mm&m=151999308428656&w=2 Is this really a bug? On 22/02/18 16:13, Igor Stoppa wrote: > While trying to change the code of find_vm_area, I got an automated > notification that my code was breaking the testing of i386, based on the > 0-day testing automation from 01.org > > I started investigating the issue and noticed that it seems to be > reproducible also on top of plain 4.16-rc2, without any of my patches. > > I'm still not 100% sure that I'm doing something sane, but I thought it > might be good to share the finding. > > The patch contains both a minimal change, to trigger the crash, and a > snippet of the log of the crash i get. > > Igor Stoppa (1): > crash vmalloc_to_page() > > mm/vmalloc.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) -- igor -- 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