From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751281AbWGKPWH (ORCPT ); Tue, 11 Jul 2006 11:22:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751286AbWGKPWG (ORCPT ); Tue, 11 Jul 2006 11:22:06 -0400 Received: from frankvm.xs4all.nl ([80.126.170.174]:4750 "EHLO janus.localdomain") by vger.kernel.org with ESMTP id S1751281AbWGKPWD (ORCPT ); Tue, 11 Jul 2006 11:22:03 -0400 Date: Tue, 11 Jul 2006 17:22:02 +0200 From: Frank van Maarseveen To: Linus Torvalds Cc: linux-kernel@vger.kernel.org Subject: [PATCH] x86: Don't randomize stack unless current->personality permits it Message-ID: <20060711152202.GA18149@janus> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i X-Subliminal-Message: Use Linux! Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Do not randomize stack location unless current->personality permits it. Signed-off-by: Frank van Maarseveen --- The problem seems also present in arch/um/kernel/process_kern.c arch/x86_64/kernel/process.c arch/i386/kernel/process.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletion(-) diff -rup a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c --- a/arch/i386/kernel/process.c 2006-06-23 16:08:13.000000000 +0200 +++ b/arch/i386/kernel/process.c 2006-07-11 14:39:20.000000000 +0200 @@ -38,6 +38,7 @@ #include #include #include +#include #include #include @@ -898,7 +899,7 @@ asmlinkage int sys_get_thread_area(struc unsigned long arch_align_stack(unsigned long sp) { - if (randomize_va_space) + if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space) sp -= get_random_int() % 8192; return sp & ~0xf; }