Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754741AbdDDTm1 (ORCPT ); Tue, 4 Apr 2017 15:42:27 -0400 Received: from mx2.suse.de ([195.135.220.15]:44597 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752968AbdDDTmZ (ORCPT ); Tue, 4 Apr 2017 15:42:25 -0400 Date: Tue, 4 Apr 2017 21:42:21 +0200 From: Michal Hocko To: Christoph Lameter Cc: Kees Cook , Andrew Morton , Pekka Enberg , David Rientjes , Joonsoo Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: Add additional consistency check Message-ID: <20170404194220.GT15132@dhcp22.suse.cz> References: <20170331164028.GA118828@beast> <20170404113022.GC15490@dhcp22.suse.cz> <20170404151600.GN15132@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 465 Lines: 15 On Tue 04-04-17 14:13:06, Cristopher Lameter wrote: > On Tue, 4 Apr 2017, Michal Hocko wrote: > > > Yes, but we do not have to blow the kernel, right? Why cannot we simply > > leak that memory? > > Because it is a serious bug to attempt to free a non slab object using > slab operations. This is often the result of memory corruption, coding > errs etc. The system needs to stop right there. Why when an alternative is a memory leak? -- Michal Hocko SUSE Labs