From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757416AbcCCUyr (ORCPT ); Thu, 3 Mar 2016 15:54:47 -0500 Received: from mail.skyhub.de ([78.46.96.112]:39450 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756850AbcCCUyp (ORCPT ); Thu, 3 Mar 2016 15:54:45 -0500 Date: Thu, 3 Mar 2016 21:54:37 +0100 From: Borislav Petkov To: "H. Peter Anvin" Cc: Brian Gerst , X86 ML , LKML , Tom Lendacky Subject: Re: [RFC PATCH] x86: Make sure verify_cpu has a good stack Message-ID: <20160303205437.GA13505@pd.tnic> References: <20160302214654.GK8362@pd.tnic> <56D7612A.4080107@zytor.com> <20160302220954.GL8362@pd.tnic> <56D76527.5020806@zytor.com> <20160302222842.GM8362@pd.tnic> <20160303122836.GC24621@pd.tnic> <395B06E1-314F-4F8A-9C89-57F8E4A61B3D@zytor.com> <20160303162952.GE24621@pd.tnic> <56D89CEE.9070406@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <56D89CEE.9070406@zytor.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 03, 2016 at 12:22:06PM -0800, H. Peter Anvin wrote: > The only thing I can think of is that the -8 creates a null pointer that > terminates a stack trace. Probably not needed anymore as print_context_stack()->valid_stack_ptr() in dumpstack.c look at the stack boundaries instead of checking for NULL... -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply.