Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759332AbZFCPYD (ORCPT ); Wed, 3 Jun 2009 11:24:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757309AbZFCPXx (ORCPT ); Wed, 3 Jun 2009 11:23:53 -0400 Received: from smtp3.ultrahosting.com ([74.213.175.254]:36845 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755266AbZFCPXx (ORCPT ); Wed, 3 Jun 2009 11:23:53 -0400 Date: Wed, 3 Jun 2009 11:23:47 -0400 (EDT) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Linus Torvalds cc: "Larry H." , linux-mm@kvack.org, Alan Cox , Rik van Riel , linux-kernel@vger.kernel.org, pageexec@freemail.hu Subject: Re: Security fix for remapping of page 0 (was [PATCH] Change ZERO_SIZE_PTR to point at unmapped space) In-Reply-To: Message-ID: References: <20090530192829.GK6535@oblivion.subreption.com> <20090530230022.GO6535@oblivion.subreption.com> <20090531022158.GA9033@oblivion.subreption.com> <20090602203405.GC6701@oblivion.subreption.com> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 515 Lines: 13 On Wed, 3 Jun 2009, Linus Torvalds wrote: > The point being that we do need to support mmap at zero. Not necessarily > universally, but it can't be some fixed "we don't allow that". Hmmm... Depend on some capability? CAP_SYS_PTRACE may be something remotely related? -- 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/