From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yk0-f175.google.com (mail-yk0-f175.google.com [209.85.160.175]) by kanga.kvack.org (Postfix) with ESMTP id C4A4182F64 for ; Tue, 22 Dec 2015 15:06:56 -0500 (EST) Received: by mail-yk0-f175.google.com with SMTP id x184so176336333yka.3 for ; Tue, 22 Dec 2015 12:06:56 -0800 (PST) Received: from mail-yk0-x22c.google.com (mail-yk0-x22c.google.com. [2607:f8b0:4002:c07::22c]) by mx.google.com with ESMTPS id m81si25625839ywb.96.2015.12.22.12.06.56 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 22 Dec 2015 12:06:56 -0800 (PST) Received: by mail-yk0-x22c.google.com with SMTP id x184so176336097yka.3 for ; Tue, 22 Dec 2015 12:06:56 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <1450755641-7856-1-git-send-email-laura@labbott.name> <1450755641-7856-7-git-send-email-laura@labbott.name> <56798D8F.9090402@labbott.name> Date: Tue, 22 Dec 2015 21:06:55 +0100 Message-ID: Subject: Re: [kernel-hardening] [RFC][PATCH 6/7] mm: Add Kconfig option for slab sanitization From: Mathias Krause Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Christoph Lameter Cc: Laura Abbott , kernel-hardening@lists.openwall.com, Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , linux-mm@kvack.org, "linux-kernel@vger.kernel.org" , Kees Cook On 22 December 2015 at 21:01, Christoph Lameter wrote: > On Tue, 22 Dec 2015, Mathias Krause wrote: > >> How many systems, do you think, are running with enabled DEBUG_SLAB / >> SLUB_DEBUG in production? Not so many, I'd guess. And the ones running >> into issues probably just disable DEBUG_SLAB / SLUB_DEBUG. > > All systems run with SLUB_DEBUG in production. SLUB_DEBUG causes the code > for debugging to be compiled in. Then it can be enabled later with a > command line parameter. Indeed, I meant CONFIG_SLUB_DEBUG_ON, i.e. compiled in and enabled SLAB cache debugging including poisoning. Regards, Mathias -- 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