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nixos/hardened profile: increase ASLR entropy

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Joachim Fasting 2017-08-13 00:17:43 +02:00
parent 5c29873e99
commit c0769dc6ef
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6
nixos/modules/profiles/hardened.nix
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@ -59,4 +59,10 @@ with lib;
# the feature at runtime. Attempting to create a user namespace
# with unshare will then fail with "no space left on device".
boot.kernel.sysctl."user.max_user_namespaces" = mkDefault 0;
# Raise ASLR entropy for 64bit & 32bit, respectively.
#
# Note: mmap_rnd_compat_bits may not exist on 64bit.
boot.kernel.sysctl."vm.mmap_rnd_bits" = mkDefault 32;
boot.kernel.sysctl."vm.mmap_rnd_compat_bits" = mkDefault 16;
}