From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out4-smtp.messagingengine.com ([66.111.4.28]:58159 "EHLO out4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752125AbbIKW14 (ORCPT ); Fri, 11 Sep 2015 18:27:56 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 5BAF7201C3 for ; Fri, 11 Sep 2015 18:27:56 -0400 (EDT) Date: Fri, 11 Sep 2015 15:27:54 -0700 From: Greg KH To: Matthias Brugger Cc: stable@vger.kernel.org, Will Deacon , Yann Droneaud Subject: Re: arm64/mm: Remove hack in mmap randomize layout Message-ID: <20150911222754.GA28800@kroah.com> References: <5009675.v9gvjRB4Io@ubix> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5009675.v9gvjRB4Io@ubix> Sender: stable-owner@vger.kernel.org List-ID: On Mon, Jul 13, 2015 at 05:07:54PM +0200, Matthias Brugger wrote: > Hi all, > > Commit d6c763afab14 "arm64/mm: Remove hack in mmap randomize layout" fixes a > security issue which reduces the entropy for mmap base address by half [1]. > A attempt to guess where the stack is mapped via brute-force needs just half > the attempts. > > I found this patch was added to v3.19-rc1 but should be added as well to: > v3.18, v3.14, v3.12 and v3.10 Thanks, now queued up for some of those. greg k-h