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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 EAEB3C83000 for ; Tue, 28 Apr 2020 19:11:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C2FC1206A1 for ; Tue, 28 Apr 2020 19:11:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="WzVLMk3J" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728863AbgD1TLx (ORCPT ); Tue, 28 Apr 2020 15:11:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50166 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728799AbgD1TLw (ORCPT ); Tue, 28 Apr 2020 15:11:52 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17B7DC03C1AB for ; Tue, 28 Apr 2020 12:11:51 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id c21so8003632plz.4 for ; Tue, 28 Apr 2020 12:11:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=ZuKRJpSBRruZhhwcrKd2xCu4bnC8nzyz0vfg5gKiFZY=; b=WzVLMk3JggrSSYQ7Gd5Im5fbe/4s5xLKCKA+WRhAavfyXWUybY4EkWdnH2g5Ok3hKN vXa3xt0POwn0CdvyyOP1ZXSy3keOW4Hjar7/eb+yZeyfTbmM1mnEUXrYMG5q+6Zsd4NS QDcXgwA8ZROB0n9hu/x8bwL1UYsX1GlEyM2yE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=ZuKRJpSBRruZhhwcrKd2xCu4bnC8nzyz0vfg5gKiFZY=; b=VDZotZp1W9cNSU2dTDZerxGwZEwRAJrSsSqbIFMnrj/3CYvGE1C0PFb915wA7R76Qn RvN59rl9oml270aPhNaA08+XDeCVcacBpXInSQ0Dqi00c9wHjWxv+9h4SvRmjZR9HTy1 vbWgR1PrwOdWls/SHtsGve+d4D6fUXeZ6dlo5BlAGiAi3Ex4jV/7U6R13lG5YWABsHFr V7TBVV/S/qqijP84kJoWsOdxKXaLsn5Wd+5BHvxlax34xMJd4u4KB8HqAglhPfd6/XTS X1zThuar/rYKl7cn3DFjCqqz1gHbcQvjqT26CkNmUmurZLvr2o/DU3tjEAZ9OKPznlQw 8A1Q== X-Gm-Message-State: AGi0PuZt+2TJEPmLHzB0fEWYo7GTkjamjJk1V1RDevUjESdNLBz8tml9 JxWyb+fYyLBz+9dfkmOPkbDZBw== X-Google-Smtp-Source: APiQypJ7Ji7eFQc2Ao4XjaljptdOLE2l7w8fbtCnDPIeXUF87f1Nwt1J9vK1yzJ7UVOATTJbbEvjEA== X-Received: by 2002:a17:902:e989:: with SMTP id f9mr15854905plb.321.1588101110521; Tue, 28 Apr 2020 12:11:50 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id q7sm6089339pgs.13.2020.04.28.12.11.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Apr 2020 12:11:49 -0700 (PDT) Date: Tue, 28 Apr 2020 12:11:48 -0700 From: Kees Cook To: Josh Poimboeuf Cc: Arnd Bergmann , Peter Zijlstra , the arch/x86 maintainers , Linux Kernel Mailing List Subject: Re: Remaining randconfig objtool warnings, linux-next-20200428 Message-ID: <202004281210.426A29EB8@keescook> References: <20200428161044.caamvx67t2z4t6vd@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200428161044.caamvx67t2z4t6vd@treble> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 28, 2020 at 11:10:44AM -0500, Josh Poimboeuf wrote: > On Tue, Apr 28, 2020 at 04:49:15PM +0200, Arnd Bergmann wrote: > > I noticed the number of objtool warnings in randconfig kernels have gone down > > recently, maybe it's possible to eliminate the remaining ones? > > > > Here are the ones I ran into recently, using gcc-9.3: > > > > ==> build/x86/0x3D2B5D6D_defconfig/log <== > > arch/x86/kvm/vmx/vmx.o: warning: objtool: vmx_handle_exit_irqoff()+0x24: unreachable instruction > > This is a legit warning caused by CONFIG_UBSAN_TRAP + > CONFIG_UBSAN_ALIGNMENT, I think Kees is going to do a fix. Yup, I'm still on the hook for this; just a bit distracted. I'll get it landed soon. -- Kees Cook