From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754674AbcHARVi (ORCPT ); Mon, 1 Aug 2016 13:21:38 -0400 Received: from arcturus.aphlor.org ([188.246.204.175]:46136 "EHLO arcturus.aphlor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754443AbcHARUx (ORCPT ); Mon, 1 Aug 2016 13:20:53 -0400 Date: Mon, 1 Aug 2016 12:37:31 -0400 From: Dave Jones To: Andrey Ryabinin Cc: Linux Kernel , Linus Torvalds , "linux-mm@kvack.org" Subject: Re: [4.7+] various memory corruption reports. Message-ID: <20160801163731.xmlcb7vi2hfqe3ri@codemonkey.org.uk> Mail-Followup-To: Dave Jones , Andrey Ryabinin , Linux Kernel , Linus Torvalds , "linux-mm@kvack.org" References: <20160729150513.GB29545@codemonkey.org.uk> <20160729151907.GC29545@codemonkey.org.uk> <20160729154929.GA30611@codemonkey.org.uk> <579B9339.7030707@gmail.com> <579B98B8.40007@gmail.com> <20160729183925.GA28376@codemonkey.org.uk> <579F2C73.6090406@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <579F2C73.6090406@gmail.com> User-Agent: Mutt/1.6.2-neo (2016-07-23) X-Spam-Flag: skipped (authorised relay user) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 01, 2016 at 02:03:15PM +0300, Andrey Ryabinin wrote: > On 07/29/2016 09:39 PM, Dave Jones wrote: > > On Fri, Jul 29, 2016 at 08:56:08PM +0300, Andrey Ryabinin wrote: > > > > > >> > I suspect this is false positives due to changes in KASAN. > > > >> > Bisection probably will point to > > > >> > 80a9201a5965f4715d5c09790862e0df84ce0614 ("mm, kasan: switch SLUB to > > > >> > stackdepot, enable memory quarantine for SLUB)" > > > >> > > > >> good call. reverting that changeset seems to have solved it. > > > > Could you please try with this? > > > Actually, this is not quite right, it should be like this: > > > > > > Seems to have stopped the corruption, but now I get NMi watchdog traces.. > > > > This should help: Yep, this seems to have silenced all the problems I saw. thanks, Dave