From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0E1BC433E0 for ; Sat, 30 May 2020 07:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C15C420721 for ; Sat, 30 May 2020 07:39:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728876AbgE3Hjq (ORCPT ); Sat, 30 May 2020 03:39:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59742 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728841AbgE3Hjp (ORCPT ); Sat, 30 May 2020 03:39:45 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 750BAC03E969 for ; Sat, 30 May 2020 00:39:45 -0700 (PDT) Received: from p5de0bf0b.dip0.t-ipconnect.de ([93.224.191.11] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1jew5S-0001lX-Ow; Sat, 30 May 2020 09:39:23 +0200 Received: by nanos.tec.linutronix.de (Postfix, from userid 1000) id 1A04310108D; Sat, 30 May 2020 09:39:22 +0200 (CEST) From: Thomas Gleixner To: Peter Zijlstra Cc: Dmitry Vyukov , syzbot , LKML , syzkaller-bugs , Ingo Molnar , Borislav Petkov , the arch/x86 maintainers , Oleg Nesterov Subject: Re: PANIC: double fault in fixup_bad_iret In-Reply-To: <20200529171104.GD706518@hirez.programming.kicks-ass.net> References: <000000000000d2474c05a6c938fe@google.com> <87o8q6n38p.fsf@nanos.tec.linutronix.de> <20200529160711.GC706460@hirez.programming.kicks-ass.net> <20200529171104.GD706518@hirez.programming.kicks-ass.net> Date: Sat, 30 May 2020 09:39:22 +0200 Message-ID: <87imgdna6t.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Peter Zijlstra writes: > On Fri, May 29, 2020 at 06:07:11PM +0200, Peter Zijlstra wrote: >> Like with KCSAN, we should blanket kill KASAN/UBSAN and friends (at the >> very least in arch/x86/) until they get that function attribute stuff >> sorted. > > Something like so. We have noinstr in kernel/rcu as well but that at least has a halfways correct state, but still.... Thanks, tglx