From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1517944438; cv=none; d=google.com; s=arc-20160816; b=BriUKog3XSpq9zgsZDrLsaTXtq6rd2bVK0xsgJ5/qwqTv1VDWDFYHwPMWMRHOrSGAM cQDn40tJnpsiZNejz/HtNpdcEAGvRDo+6qLLVCYOHoeubUloNu4M29rTXPx5PpSu6rrQ WSTki94zvunHKaRgCOzZJKq5ZoRbcX6/CEFmA03KskIJGx/N3YYaGkJst2M43sstxNTH BwwaBqc9ZauNkZ7L5GCQQMqHxx3p0jcmIyv9JOs/O7X8F2GqEcXHQ9AN2oWAjJ2j1gqD 9IeYY9nfMGWsE2vT1aeH1SWOk2z0eQAuLxfUDgj5sGedbSiPMcAdr9iEao7KUvqJ3zZP 8SZQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-transfer-encoding :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:sender:dkim-signature:arc-authentication-results; bh=V8+oVW7nZy1Ao/tCJDOT9+orbqYilvKj3ah0OKv9Os8=; b=vesHvZrO3kxAfOp8cGu7jFEcQbYZ6KKcpxLlcUt6VGS4t1AEBxJk497uReUgw7hdII QpRBTgGNNP5EL1tvjZWx4k5G3fWEdvcPLSWsprTdduId5tasuqaThnk+vQa7NWoLN+Lb 7FlpJ7l/gM1fQ6fTo/GrJXMZ5H4pGSR17YTG4mulGqLBM+URkMI02sN3cEupTbQAJkdI K9ess61n10zYvyvu5UitfOAq3GxSjaKWqf1rzF/o9kjd/mgrf9HFYIhPEXVsTonE/vpP MwOUsD7pbrdfJAW5+uD9y+nPf5qL3yw7rnjYhTxBp26AT/fiw0PzOncPG04SiFuCtPIt eZBw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=Dm+BiGPY; spf=pass (google.com: domain of groeck7@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=groeck7@gmail.com Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=Dm+BiGPY; spf=pass (google.com: domain of groeck7@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=groeck7@gmail.com X-Google-Smtp-Source: AH8x2270RcAEiB0CdE/VNz0XhJ1Ggx28fxUnJ2umz+i7Dv4Ii2Osimg/iBMejgSnwHP2dTEtgQURLA== Sender: Guenter Roeck Date: Tue, 6 Feb 2018 11:13:55 -0800 From: Guenter Roeck To: David Woodhouse Cc: Greg Kroah-Hartman , whiteheadm@acm.org, Hugh Dickins , dave.hansen@linux.intel.com, jikos@kernel.org, Borislav Petkov , Kees Cook , Jamie Iles , eduval@amazon.com, labbott@redhat.com, Rik van Riel , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: [BUG] x86 : i486 reporting to be vulnerable to Meltdown/Spectre_V1/Spectre_V2 Message-ID: <20180206191355.GA7424@roeck-us.net> References: <1517643438.31953.108.camel@infradead.org> <20180206190233.GA10476@kroah.com> <1517944227.3677.15.camel@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1517944227.3677.15.camel@infradead.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1591354140743903681?= X-GMAIL-MSGID: =?utf-8?q?1591680107758232664?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Tue, Feb 06, 2018 at 07:10:27PM +0000, David Woodhouse wrote: > > > On Tue, 2018-02-06 at 11:02 -0800, Greg Kroah-Hartman wrote: > > . > > >  > > > David > > >   I believe I got the patch(es) you mention in in the stable 4.15.1 kernel: > > >  > > > Pull x86/pti updates from Thomas Gleixner: "Another set of melted > > > spectrum related changes" > > > (commit 6304672b7f0a5c010002e63a075160856dc4f88d). > > >  > > > Unfortunately, the symptoms I reported remain on at least the i486 and i686. > > > > Can you try 4.15.2-rc1?  Or how about Linus's kernel tree now?  There > > was a lot of spectrum patches merged just this week that were not in > > 4.15.1. > > No, for the 486 it *should* have worked. The interesting commit > is fec9434a12 ("x86/pti: Do not enable PTI on CPUs which are not > vulnerable to Meltdown") which is indeed pulled in with the merge > commit that Matthew mentions. > I disagree. $ git describe v4.15.1-61-g7ab5513e4cbc $ git log --oneline v4.15.1.. | grep Melt 3472b3689bab x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown Guenter