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 E1D02EE49A5 for ; Fri, 25 Aug 2023 08:27:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242163AbjHYI1M (ORCPT ); Fri, 25 Aug 2023 04:27:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241055AbjHYI0o (ORCPT ); Fri, 25 Aug 2023 04:26:44 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ECE4D19AD; Fri, 25 Aug 2023 01:26:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 82F656301E; Fri, 25 Aug 2023 08:26:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95696C433C8; Fri, 25 Aug 2023 08:26:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1692951999; bh=n4dEAjABUpK1jXJJBo6zRCVHWgib83V/fJcuQWhG8+o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=F19A3i3eCm/PHXoh2KAsN7HSAL7/gpppaB2hmfA9ycB+AuZ8he2ZKOf6NLCJJLOCc YRyRM9qL18TPxlZbTBk+kcDTQIqhMqMH3B6HQntDkvKe8wjP/n4qlsmZGC0a/6H3wz m9qFi1zUNmcxUxjPJMjp81J2sQc5ymO2ijtuhIug= Date: Fri, 25 Aug 2023 09:24:18 +0200 From: Greg KH To: Josh Poimboeuf Cc: Borislav Petkov , "Paul E. McKenney" , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, x86@kernel.org, peterz@infradead.org, keescook@chromium.org, elver@google.com, dvyukov@google.com, glider@google.com Subject: Re: [BUG] missing return thunk: __ret+0x5/0x7e-__ret+0x0/0x7e: e9 f6 ff ff ff Message-ID: <2023082514-union-uphold-e7f7@gregkh> References: <4dc3d0ec-b827-4bce-8927-cfa5d837fd03@paulmck-laptop> <20230816181720.GNZN0SsKi/B4eCsZHu@fat_crate.local> <2023082458-vividness-habitable-cbc8@gregkh> <20230825063302.GBZOhLHgdvhIw1d6f1@fat_crate.local> <20230825071512.yqtpmrie2zma3qcp@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230825071512.yqtpmrie2zma3qcp@treble> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 25, 2023 at 12:15:12AM -0700, Josh Poimboeuf wrote: > On Fri, Aug 25, 2023 at 08:33:02AM +0200, Borislav Petkov wrote: > > On Thu, Aug 24, 2023 at 03:52:56PM +0200, Greg KH wrote: > > > On Wed, Aug 16, 2023 at 08:17:20PM +0200, Borislav Petkov wrote: > > > > Hey Paul, > > > > > > > > On Wed, Aug 16, 2023 at 10:54:09AM -0700, Paul E. McKenney wrote: > > > > > I hit the splat at the end of this message in recent mainline, and has > > > > > appeared some time since v6.5-rc1. Should I be worried? > > > > > > > > does it go away if you try the latest tip:x86/urgent branch? > > > > > > Note, this problem is showing up in the 6.1.y branch right now, due to > > > one objtool patch not being able to be backported there easily (i.e. I > > > tried and gave up.) > > > > > > 4ae68b26c3ab ("objtool/x86: Fix SRSO mess") being the commit that I > > > can't seem to get to work properly, my attempt can be seen here: > > > https://lore.kernel.org/r/2023082212-pregnant-lizard-80e0@gregkh > > > > > > Just a heads up as this will start to affect users of the next 6.1.y > > > release, and probably older releases, as they are taking portions of the > > > "fixes for fixes" but not the above mentioned one. > > > > Hmm, Peter and I are away, I guess maybe Josh might have an idea how and > > what to backport to 6.1 to get this sorted out... > > > > CCed. > > Sure, will take a look tomorrow. Many thanks!