Date: Sun, 10 Feb 2019 11:54:50 -0600 From: Karl Denninger <karl@denninger.net> To: Ian Lepore <ian@freebsd.org> Cc: freebsd-stable@freebsd.org, Allan Jude <allanjude@freebsd.org> Subject: Re: Fwd: Serious ZFS Bootcode Problem (GPT NON-UEFI) Message-ID: <3fd7f001-879c-7b1e-3d1a-d2939ac07d9c@denninger.net> In-Reply-To: <16c56c89ff8a3d89164d9152f6c38687dcba99b5.camel@freebsd.org> References: <911d001f-9e33-0521-51fe-f7d1383dfc62@denninger.net> <CANCZdfp0QaXodmYBp9Eox9Ca5kyQibCXw5rRTwsO-mCjApYswA@mail.gmail.com> <b11ec38c-1c6a-6e92-810c-4d2fe3e8df3d@freebsd.org> <a107a4f5-2851-191a-5f8c-a4cd44c98458@denninger.net> <16c56c89ff8a3d89164d9152f6c38687dcba99b5.camel@freebsd.org>
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This is a cryptographically signed message in MIME format. --------------ms050201080404070104040606 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 2/10/2019 11:50, Ian Lepore wrote: > On Sun, 2019-02-10 at 11:37 -0600, Karl Denninger wrote: >> On 2/10/2019 09:28, Allan Jude wrote: >>> Are you sure it is non-UEFI? As the instructions you followed, >>> overwriting da0p1 with gptzfsboot, will make quite a mess if that >>> happens to be the EFI system partition, rather than the freebsd- >>> boot >>> partition. >> [...] >> >> BTW am I correct that gptzfsboot did *not* get the ability to read >> geli-encrypted pools in 12.0? The UEFI loader does know how (which I'= m >> using on my laptop) but I was under the impression that for non-UEFI >> systems you still needed the unencrypted boot partition from which to >> load the kernel. >> > Nope, that's not correct. GELI support was added to the boot and loader= > programs for both ufs and zfs in freebsd 12. You must set the geli '-g'= =20 > option to be prompted for the passphrase while booting (this is > separate from the '-b' flag that enables mounting the encrypted > partition as the rootfs). You can use "geli configure -g" to turn on > the flag on any existing geli partition. > > -- Ian Excellent - this will eliminate the need for me to run down the foot-shooting that occurred in my update script since the unencrypted kernel partition is no longer needed at all.=C2=A0 That also significantl= y reduces the attack surface on such a machine (although you could still tamper with the contents of freebsd-boot of course.) The "-g" flag I knew about from experience in putting 12 on my X1 Carbon (which works really well incidentally; the only issue I'm aware of is that there's no 5Ghz WiFi support.) --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms050201080404070104040606 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC DdgwggagMIIEiKADAgECAhMA5EiKghDOXrvfxYxjITXYDdhIMA0GCSqGSIb3DQEBCwUAMIGL MQswCQYDVQQGEwJVUzEQMA4GA1UECAwHRmxvcmlkYTESMBAGA1UEBwwJTmljZXZpbGxlMRkw FwYDVQQKDBBDdWRhIFN5c3RlbXMgTExDMRgwFgYDVQQLDA9DdWRhIFN5c3RlbXMgQ0ExITAf BgNVBAMMGEN1ZGEgU3lzdGVtcyBMTEMgMjAxNyBDQTAeFw0xNzA4MTcxNjQyMTdaFw0yNzA4 MTUxNjQyMTdaMHsxCzAJBgNVBAYTAlVTMRAwDgYDVQQIDAdGbG9yaWRhMRkwFwYDVQQKDBBD 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