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 C36F7C3DA66 for ; Fri, 25 Aug 2023 07:16:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242916AbjHYHPf (ORCPT ); Fri, 25 Aug 2023 03:15:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243148AbjHYHPS (ORCPT ); Fri, 25 Aug 2023 03:15:18 -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 0DAD019B0; Fri, 25 Aug 2023 00:15:16 -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 9686266798; Fri, 25 Aug 2023 07:15:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9FA50C433C7; Fri, 25 Aug 2023 07:15:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692947715; bh=JLsSZDXLKc5glBFhzwQ6UlaoXdzLUq4UKNtCPROpmgM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Icujbchq2KE69jLiNDRzCfoaMuLd8AvDhe30LVIIXZ2QAUTA40rlmOUOfmAb0/ZQl HSgUYDB7R8FhpgtogKB0yy7/iSvWbiqqRj4XkdzoBfvlwqrYAhepnAIWssa4BmUDEZ mcrAiNd0ZIEAdpiztq1+zJH8+btq5IhKk1n5fd6OaD+0dyuk+nzgQkO5IVebtGAlLN vpCUBGk8qAN/+fgCHS4azptOlfXU+5Yx7DQOhYeyEA8KOsf7vfZSpo3vawj2+pJ8fR 34NBMz/3Po2kN5sQdDLtbju88w5RJwzxQqoZ0K3z3oS+RlSzfHEsQHwl6lJ+jzg3bS WYoWko9xcpF9w== Date: Fri, 25 Aug 2023 00:15:12 -0700 From: Josh Poimboeuf To: Borislav Petkov Cc: Greg KH , "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: <20230825071512.yqtpmrie2zma3qcp@treble> References: <4dc3d0ec-b827-4bce-8927-cfa5d837fd03@paulmck-laptop> <20230816181720.GNZN0SsKi/B4eCsZHu@fat_crate.local> <2023082458-vividness-habitable-cbc8@gregkh> <20230825063302.GBZOhLHgdvhIw1d6f1@fat_crate.local> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230825063302.GBZOhLHgdvhIw1d6f1@fat_crate.local> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. -- Josh