From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932695AbdJZPZH (ORCPT ); Thu, 26 Oct 2017 11:25:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36810 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932617AbdJZPYd (ORCPT ); Thu, 26 Oct 2017 11:24:33 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com E5B99C057FAF Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=jpoimboe@redhat.com Date: Thu, 26 Oct 2017 10:24:29 -0500 From: Josh Poimboeuf To: Andrei Vagin Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar , torvalds@linux-foundation.org, peterz@infradead.org, hpa@zytor.com, tglx@linutronix.de, Andy Lutomirski Subject: Re: [PATCH 1/3] x86/entry: Fix idtentry unwind hint Message-ID: <20171026152429.77dkjuwwsocou54t@treble> References: <931d57f0551ed7979d5e7e05370d445c8e5137f8.1508516398.git.jpoimboe@redhat.com> <20171025210737.GA16091@outlook.office365.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20171025210737.GA16091@outlook.office365.com> User-Agent: Mutt/1.6.0.1 (2016-04-01) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Thu, 26 Oct 2017 15:24:33 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 25, 2017 at 02:07:38PM -0700, Andrei Vagin wrote: > Hi Josh, > > Here is one more warning: > [ 5.852094] WARNING: can't dereference iret registers at ffffb6ce01b7ffe0 for ip entry_SYSCALL_64_fastpath+0xa/0xc2 Thanks, I hadn't seen this one yet. I suspect this is in the middle of the ENABLE_INTERRUPTS() paravirt code, which would mean this is another issue that will be fixed by my "Make pv ops code generation more closely match reality" patches. If you can share either the entry_64.o file or the .config, and what virt platform it's running on (kvm, xen, native), I should be able to confirm the issue. I'm in Prague this week but I should have a v2 of those patches in a week or two (will cc you). -- Josh