Bug: https://bugs.gentoo.org/876893
Bug: https://bugs.gentoo.org/876895
Signed-off-by: Sam James <s...@gentoo.org>
---
...-12-28-hardening-fortify-assertions.en.txt | 57 +++++++++++++++++++
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+Title: Hardened profiles improvements
+Author: Sam James <s...@gentoo.org>
+Posted: 2022-12-27
+Revision: 1
+News-Item-Format: 2.0
+Display-If-Profile: features/hardened
+Display-If-Profile: default/linux/ppc64le/17.0/musl/hardened
+Display-If-Profile: default/linux/ppc/17.0/musl/hardened
+Display-If-Profile: default/linux/amd64/17.0/no-multilib/hardened
+Display-If-Profile: default/linux/amd64/17.0/hardened
+Display-If-Profile: default/linux/amd64/17.0/musl/hardened
+Display-If-Profile: default/linux/amd64/17.1/hardened
+Display-If-Profile: default/linux/amd64/17.1/no-multilib/hardened
+Display-If-Profile: default/linux/x86/17.0/hardened
+Display-If-Profile: default/linux/arm/17.0/musl/armv7a/hardened
+Display-If-Profile: default/linux/arm/17.0/musl/armv6j/hardened
+Display-If-Profile: default/linux/arm/17.0/armv7a/hardened
+Display-If-Profile: default/linux/arm/17.0/armv6j/hardened
+Display-If-Profile: default/linux/ppc64/17.0/musl/hardened
+Display-If-Profile: default/linux/arm64/17.0/hardened
+Display-If-Profile: default/linux/arm64/17.0/musl/hardened
+
+Gentoo's hardened profiles are adopting two new modern toolchain hardening
+techniques:
+1. Level 3 fortification (-D_FORTIFY_SOURCE=3) [0]
+2. libstdc++ assertions (-D_GLIBCXX_ASSERTIONS) [1]
+
+These will both be enabled by default with USE=hardened on sys-devel/gcc
+for >=sys-devel/gcc-12.2.1_p20221224-r1.
+
+To view the existing list of hardening changes applied by the profiles,
+see the wiki [2].
+
+Stable users may wish to add sys-devel/gcc-12.2.1_p20221224-r1 into
+/etc/portage/package.accept_keywords if they wish to take advantage
+of these improvements early, before GCC 12 is marked stable.
+
+## Migration
+
+To fully take advantage of these new settings, GCC must first
+be upgraded, and then all packages must be re-emerged:
+1. emerge --sync
+2. emerge --verbose --oneshot ">=sys-devel/gcc-12.2.1_p20221224-r1"
+3. emerge --verbose --emptytree @world
+
+## Troubleshooting
+
+In the event that some packages fail at runtime, please file a bug
+with the full details. To temporarily workaround the problem,
+it should be possible to recompile broken packages with the
+following *FLAGS:
+CFLAGS="${CFLAGS} -D_FORTIFY_SOURCE=2"
+CXXFLAGS="${CXXFLAGS} -D_FORTIFY_SOURCE=2 -U_GLIBCXX_ASSERTIONS"
+
+[0] https://bugs.gentoo.org/876893
+[1] https://bugs.gentoo.org/876895
+[2] https://wiki.gentoo.org/wiki/Hardened/Toolchain#Changes
--
2.39.0
