Re: HEADS-UP: PIE enabled by default on stable/13

[Marek Zarychta]

W dniu 24.01.2022 o 07:42, Marcin Wojtas pisze:

+freebsd-stable@

niedz., 23 sty 2022 o 11:36 Marcin Wojtas <m...@semihalf.com> napisał(a):

Hi,

As of 396e9f259d962 the base system binaries are now built as 
position-independent executable (PIE) by default, for 64-bit architectures. 
Thanks to that enabling ASLR can be done simply
by sysctls knobs when booting the kernel.

If you track stable/13 and normally build WITHOUT_CLEAN you'll need to do one 
initial clean build -- either run `make cleanworld` or set WITH_CLEAN=yes.

The change is a pure MFC of the changes integrated to -CURRENT early 2021 and 
no issues are expected, but in case any problems are observed, please issue a 
PR and/or let me know in this thread.

Best regards,
Marcin

[1] https://www.mail-archive.com/freebsd-current@freebsd.org/msg183605.html

--
Marek Zarychta

Thanks for enabling this. If I understand it correctly we got some improvements mentioned here[1] and it doesn't imply that ASLR has to be enabled, especially kern.elf64.aslr.pie_enable can be still set to 0 ?

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