From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id CC8E16B0260 for ; Fri, 29 Jul 2016 11:21:15 -0400 (EDT) Received: by mail-wm0-f70.google.com with SMTP id p129so41633434wmp.3 for ; Fri, 29 Jul 2016 08:21:15 -0700 (PDT) Received: from mail-lf0-x22f.google.com (mail-lf0-x22f.google.com. [2a00:1450:4010:c07::22f]) by mx.google.com with ESMTPS id k134si9078796lfb.396.2016.07.29.08.21.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 29 Jul 2016 08:21:13 -0700 (PDT) Received: by mail-lf0-x22f.google.com with SMTP id l69so73642183lfg.1 for ; Fri, 29 Jul 2016 08:21:13 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20160729151907.GC29545@codemonkey.org.uk> References: <20160729150513.GB29545@codemonkey.org.uk> <20160729151907.GC29545@codemonkey.org.uk> From: Andrey Ryabinin Date: Fri, 29 Jul 2016 18:21:12 +0300 Message-ID: Subject: Re: [4.7+] various memory corruption reports. Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Dave Jones , Linux Kernel , Linus Torvalds , "linux-mm@kvack.org" 2016-07-29 18:19 GMT+03:00 Dave Jones : > On Fri, Jul 29, 2016 at 11:05:14AM -0400, Dave Jones wrote: > > I've just gotten back into running trinity on daily pulls of master, and it seems pretty horrific > > right now. I can reproduce some kind of memory corruption within a couple minutes runtime. > > > > ,,, > > > > I'll work on narrowing down the exact syscalls needed to trigger this. > > Even limiting it to do just a simple syscall like execve (which fails most the time in trinity) > triggers it, suggesting it's not syscall related, but the fact that trinity is forking/killing > tons of processes at high rate is stressing something more fundamental. > > Given how easy this reproduces, I'll see if bisecting gives up something useful. 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)" -- 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