4150f5e8ba
This fixes the Stack Clash issue rediscovered by Qualys. See https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt for more information on the topic, specifically section III. We don't have the kernel mitigation available because it is a Grsecurity feature which we don't support anymore. Other distributions like Gentoo Hardened and Arch already have `-fstack-check` enabled by default. See the Gentoo page on Stack Clash for more information on this solution: https://wiki.gentoo.org/wiki/Hardened/Gentoo_Hardened_and_Stack_Clash This unfortunately doesn't apply to clang because `-fstack-check` is a noop there. Note that the GCC implementation also has problems that could be exploited to circumvent these checks but it is still better than keeping it disabled.
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-17.03 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-17.03
For pull-requests, please rebase onto nixpkgs master.
NixOS linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Nix Wiki (deprecated, see milestone "Move the Wiki!")
- Continuous package builds for unstable/master
- Continuous package builds for 17.03 release
- Tests for unstable/master
- Tests for 17.03 release
Communication: