Date: Wed, 15 May 2019 11:06:42 -0400 From: Mark Johnston <markj@freebsd.org> To: Kyle Evans <kevans@freebsd.org> Cc: mike tancsa <mike@sentex.net>, "Wall, Stephen" <stephen.wall@redcom.com>, "freebsd-security@freebsd.org" <freebsd-security@freebsd.org> Subject: Re: [FreeBSD-Announce] FreeBSD Security Advisory FreeBSD-SA-19:07.mds Message-ID: <20190515150642.GA62210@raichu> In-Reply-To: <CACNAnaHirOChx2NJstuqs8QD17Mzn2dyvrK0hogGaADK0-F_xg@mail.gmail.com> References: <20190515000302.44CBB1AB79@freefall.freebsd.org> <cdf6982694db447985b15e9170256fe5@exch-02.redcom.com> <31b178d5-9998-d2a3-cc4c-d3f7d574743a@sentex.net> <CACNAnaHirOChx2NJstuqs8QD17Mzn2dyvrK0hogGaADK0-F_xg@mail.gmail.com>
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On Wed, May 15, 2019 at 09:33:50AM -0500, Kyle Evans wrote: > On Wed, May 15, 2019 at 8:33 AM mike tancsa <mike@sentex.net> wrote: > > > > On 5/15/2019 8:18 AM, Wall, Stephen wrote: > > >> New CPU microcode may be available in a BIOS update from your system vendor, > > >> or by installing the devcpu-data package or sysutils/devcpu-data port. > > >> Ensure that the BIOS update or devcpu-data package is dated after 2014-05-14. > > >> > > >> If using the package or port the microcode update can be applied at boot time > > >> by adding the following lines to the system's /boot/loader.conf: > > >> > > >> cpu_microcode_load="YES" > > >> cpu_microcode_name="/boot/firmware/intel-ucode.bin" > > > Is this applicable in a virtualized environment, or only on bare metal? > > > If not applicable in a VM, is it at least harmless? > > > > > > Actually, just tried this on RELENG_11 (r347613) and I get > > > > don't know how to load module '/boot/firmware/intel-ucode.bin' > > > > In boot/loader.conf I have > > > > cpu_microcode_load="YES" > > cpu_microcode_name="/boot/firmware/intel-ucode.bin" > > > > # ls -l /boot/firmware/intel-ucode.bin > > -rw-r--r-- 1 root wheel uarch 2571264 May 15 08:47 > > /boot/firmware/intel-ucode.bin > > > > # sha256 /boot/firmware/intel-ucode.bin > > SHA256 (/boot/firmware/intel-ucode.bin) = > > 1fdb3a25467d285394eded8039ee8ab488f074903654981d35a4cdfe6ebf12fc > > > > r337715 + r337716 were responsible for making this work, and they've > not yet been MFC'd as far as I can tell. CC markj@, because that's > probably good to sneak in soon. I'm working on this. In any case, 11.2 doesn't have and won't get boot-time microcode update support, so an updated SA with instructions for 11 will be released shortly.help
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