From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBA9AC43387 for ; Sat, 5 Jan 2019 01:28:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9222E21872 for ; Sat, 5 Jan 2019 01:28:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726349AbfAEB2F (ORCPT ); Fri, 4 Jan 2019 20:28:05 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:39310 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725862AbfAEB2F (ORCPT ); Fri, 4 Jan 2019 20:28:05 -0500 Received: from localhost.localdomain (c-24-6-170-16.hsd1.ca.comcast.net [24.6.170.16]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id B816515; Sat, 5 Jan 2019 01:28:03 +0000 (UTC) Date: Fri, 4 Jan 2019 17:28:02 -0800 From: Andrew Morton To: Vlastimil Babka Cc: Dmitry Vyukov , syzbot , Andrea Arcangeli , Alexander Potapenko , "Kirill A. Shutemov" , LKML , Linux-MM , linux@dominikbrodowski.net, Michal Hocko , David Rientjes , syzkaller-bugs , xieyisheng1@huawei.com, zhong jiang Subject: Re: KMSAN: uninit-value in mpol_rebind_mm Message-Id: <20190104172802.ce9c4b77577a9c2810f04171@linux-foundation.org> In-Reply-To: <52835ef5-6351-3852-d4ba-b6de285f96f5@suse.cz> References: <000000000000c06550057e4cac7c@google.com> <52835ef5-6351-3852-d4ba-b6de285f96f5@suse.cz> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 4 Jan 2019 09:50:31 +0100 Vlastimil Babka wrote: > > Yes, it doesn't and it's not trivial to do. The tool reports uses of > > unint _values_. Values don't necessary reside in memory. It can be a > > register, that come from another register that was calculated as a sum > > of two other values, which may come from a function argument, etc. > > I see. BTW, the patch I sent will be picked up for testing, or does it > have to be in mmotm/linux-next first? I grabbed it. To go further we'd need a changelog, a signoff, description of testing status, reviews, a Fixes: and perhaps a cc:stable ;)