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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B67AC433EF for ; Wed, 20 Jul 2022 17:50:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230445AbiGTRu1 (ORCPT ); Wed, 20 Jul 2022 13:50:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234235AbiGTRuY (ORCPT ); Wed, 20 Jul 2022 13:50:24 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E6DD27FDF for ; Wed, 20 Jul 2022 10:50:23 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A70CBB82185 for ; Wed, 20 Jul 2022 17:50:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56D45C3411E; Wed, 20 Jul 2022 17:50:18 +0000 (UTC) Date: Wed, 20 Jul 2022 13:50:16 -0400 From: Steven Rostedt To: Peter Zijlstra Cc: Linus Torvalds , Thomas Gleixner , LKML , the arch/x86 maintainers , Tim Chen , Josh Poimboeuf , Andrew Cooper , Pawan Gupta , Johannes Wikner , Alyssa Milburn , Jann Horn , "H.J. Lu" , Joao Moreira , Joseph Nuzman , Juergen Gross , Masami Hiramatsu , Alexei Starovoitov , Daniel Borkmann Subject: Re: [patch 00/38] x86/retbleed: Call depth tracking mitigation Message-ID: <20220720135016.3178ffc6@gandalf.local.home> In-Reply-To: References: <20220716230344.239749011@linutronix.de> <20220720125736.48164a14@gandalf.local.home> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 20 Jul 2022 19:24:32 +0200 Peter Zijlstra wrote: > There's a patch for that: > > https://lkml.kernel.org/r/20220713213819.460771-1-keescook@chromium.org > > it seems to have gotten lost, let me go queue that. With this applied, I now have: [ 2.442118] MDS: Vulnerable: Clear CPU buffers attempted, no microcode [ 2.443117] SRBDS: Vulnerable: No microcode [ 2.463339] ------------[ cut here ]------------ [ 2.464117] missing return thunk: lkdtm_rodata_do_nothing+0x0/0x8-lkdtm_rodata_do_nothing+0x5/0x8: e9 00 00 00 00 [ 2.464128] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/alternative.c:558 apply_returns+0xcb/0x219 [ 2.466117] Modules linked in: [ 2.467117] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc7-test+ #66 [ 2.468117] Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014 [ 2.469117] RIP: 0010:apply_returns+0xcb/0x219 [ 2.470117] Code: 80 3d d1 32 06 02 00 75 59 49 89 d8 b9 05 00 00 00 4c 89 e2 48 89 de 48 c7 c7 63 98 b4 ae c6 05 b3 32 06 02 01 e8 f8 4f fb 00 <0f> 0b eb 34 44 0f b6 65 a2 31 c0 48 8d 55 c1 c6 45 c0 c3 48 89 d7 [ 2.471117] RSP: 0000:ffffffffaee03df0 EFLAGS: 00010286 [ 2.472117] RAX: 0000000000000000 RBX: ffffffffae73e8a8 RCX: ffffffffae056641 [ 2.473117] RDX: ffffffffaee03d78 RSI: 0000000000000001 RDI: 00000000ffffffff [ 2.474117] RBP: ffffffffaee03ea8 R08: 0000000000000000 R09: 00000000ffffffea [ 2.475117] R10: 000000000000001f R11: ffffffffaee03a4d R12: ffffffffae73e8ad [ 2.476117] R13: ffffffffaf550d30 R14: 0000000000000000 R15: ffffffffaee32138 [ 2.477117] FS: 0000000000000000(0000) GS:ffff9d71d6400000(0000) knlGS:0000000000000000 [ 2.478117] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 -- Steve