Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757479Ab3HGTdK (ORCPT ); Wed, 7 Aug 2013 15:33:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50650 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757246Ab3HGTdJ (ORCPT ); Wed, 7 Aug 2013 15:33:09 -0400 Date: Wed, 7 Aug 2013 21:27:34 +0200 From: Oleg Nesterov To: Linus Torvalds Cc: Grazvydas Ignotas , Felipe Contreras , Linux Kernel Mailing List , Frederic Weisbecker , Ingo Molnar , Denys Vlasenko Subject: Re: [PATCH 0/1] (Was: Linux 3.11-rc4) Message-ID: <20130807192734.GA8395@redhat.com> References: <20130806154314.GA398@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 635 Lines: 18 On 08/07, Linus Torvalds wrote: > > It's a security issue: setting debug traps on kernel code/data > addresses can not only leak information, it can cause serious trouble > (taking a debug trap on the first instruction of an NMI handler etc) > including kernel stack corruption... I guess Grazvydas only meant the "unnecessary" align/len/type checks. But you are right of course. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/