Date: Fri, 26 Feb 2021 19:34:03 +0100 From: Gordon Bergling <gbe@freebsd.org> To: Ed Maste <emaste@freebsd.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: HEADS-UP: PIE enabled by default on main Message-ID: <YDk/G50NWjeoia33@lion.0xfce3.net> In-Reply-To: <CAPyFy2CyxG=Bj8T22ixW3=E3dv6mPoZRwJ_VSN%2BTwky95rUYYw@mail.gmail.com> References: <CAPyFy2CyxG=Bj8T22ixW3=E3dv6mPoZRwJ_VSN%2BTwky95rUYYw@mail.gmail.com>
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--N5TZ0lfI0IglflPV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 25, 2021 at 03:58:07PM -0500, Ed Maste wrote: > As of 9a227a2fd642 (main-n245052) base system binaries are now built > as position-independent executable (PIE) by default, for 64-bit > architectures. PIE executables are used in conjunction with address > randomization as a mitigation for certain types of security > vulnerabilities. >=20 > If you track -CURRENT and normally build WITHOUT_CLEAN you'll need to > do one initial clean build -- either run `make cleanworld` or set > WITH_CLEAN=3Dyes. >=20 > No significant user-facing changes are expected from this change, but > there are some minor ones. For example, `file` will indicate that > binaries are PIE by reporting something like `ELF 64-bit LSB pie > executable` rather than `ELF 64-bit LSB executable`. Also, for most > workloads no notable performance impact is expected. >=20 > For almost all ports this should result in no change. There are a > small number of ports that use base system /usr/share/mk > infrastructure and thus inherit the base system default, and some of > those initially failed to build. Those found during an exp-run in > PR253275 have been addressed or have patches waiting. >=20 > Please watch out for any new issues after you next update the base > system and/or ports, and report issues via a Bugzilla PR or in reply > here. Thats a huge step forward in terms on security. Thanks for the efforts and anyone involved. --Gordon --N5TZ0lfI0IglflPV Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGTBAEBCgB9FiEEYbWI0KY5X7yH/Fy4OQX2V8rP09wFAmA5PxtfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDYx QjU4OEQwQTYzOTVGQkM4N0ZDNUNCODM5MDVGNjU3Q0FDRkQzREMACgkQOQX2V8rP 09w3vAf/QMMXS//HKi/CVLUpki2+X8WDsDLDHT87yVPPuPXzPfodjBTn4Eb9ZYD7 5e3lRd+wB6pUQbnSQN/GsyTxjRldFOLjkRtqQ50RTApOk0AYUctfZXoD9DRobc8T cxfwRDWa33v999yMC0XZF2TUnSNFZ/GMCRH/4F/JQK1WITlSGfIAxXDtd5jRZIUN DpXqx+rU/r7Y6Sfr3sVx1nJxrBK9uTaBq6a+LiQXzO83KUbu0a2rcR/hoNsJ0jM/ N7wI+ma8hr9OlYn/eUqidq2VHQYhAs6h11ci7uqsGEb/bgiSnzuM6FkGFTeyuj6R K9uhNAKdWPE5/Y/+Bx4jYyWqnHLfAA== =v6tF -----END PGP SIGNATURE----- --N5TZ0lfI0IglflPV--
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