Commit graph

153 commits

Author SHA1 Message Date
Florian Klink 4e586dea50
Merge pull request #63773 from flokli/installation-device-fixes
installation-device.nix: explain sshd usage, don't include clone-config
2019-08-31 02:59:23 +02:00
Marek Mahut 7a4b296c8d
Merge pull request #66687 from joachifm/feat/hardened-nixos-revert-graphene-malloc
Revert "nixos/hardened: use graphene-hardened malloc by default"
2019-08-19 20:56:07 +02:00
Florian Klink f71fd79ff0 nixos/installation-device.nix: explain sshd usage 2019-08-19 16:34:06 +02:00
Florian Klink 9be0327a49 nixos/systemd: install sysctl snippets
systemd provides two sysctl snippets, 50-coredump.conf and
50-default.conf.

These enable:
 - Loose reverse path filtering
 - Source route filtering
 - `fq_codel` as a packet scheduler (this helps to fight bufferbloat)

This also configures the kernel to pass coredumps to `systemd-coredump`.
These sysctl snippets can be found in `/etc/sysctl.d/50-*.conf`,
and overridden via `boot.kernel.sysctl`
(which will place the parameters in `/etc/sysctl.d/60-nixos.conf`.

Let's start using these, like other distros already do for quite some
time, and remove those duplicate `boot.kernel.sysctl` options we
previously did set.

In the case of rp_filter (which systemd would set to 2 (loose)), make
our overrides to "1" more explicit.
2019-08-18 17:54:26 +02:00
Joachim Fasting 4ead3d2ec3
Revert "nixos/hardened: use graphene-hardened malloc by default"
This reverts commit 48ff4f1197.

Causes too much breakage to be enabled by default [1][2].

[1]: https://github.com/NixOS/nixpkgs/issues/61489
[2]: https://github.com/NixOS/nixpkgs/issues/65000
2019-08-15 18:49:57 +02:00
Joachim Fasting da0b67c946
nixos-hardened: disable unprivileged userfaultfd syscalls
New in 5.2 [1]

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cefdca0a86be517bc390fc4541e3674b8e7803b0
2019-08-15 18:43:34 +02:00
Joachim Fasting 4b21d1ac8c
nixos-hardened: enable page alloc randomization 2019-08-15 18:43:32 +02:00
worldofpeace 397c7d26fc installer: Don't run as root
There's many reason why it is and is going to
continue to be difficult to do this:

1. All display-managers (excluding slim) default PAM rules
   disallow root auto login.

2. We can't use wayland

3. We have to use system-wide pulseaudio

4. It could break applications in the session.
   This happened to dolphin in plasma5
   in the past.

This is a growing technical debt, let's just use
passwordless sudo.
2019-08-12 14:45:27 -04:00
Pierre Bourdon 67b7e70865
nixos/hardened: make pti=on overridable
Introduces a new security.forcePageTableIsolation option (default false
on !hardened, true on hardened) that forces pti=on.
2019-07-30 02:24:56 +02:00
Marek Mahut e72f25673d Renaming security.virtualization.flushL1DataCache to virtualisation
Fixes #65044
2019-07-19 15:49:37 +02:00
Joachim Fasting c3cc7034e2
nixos/hardened: harder inet defaults
See e.g., https://github.com/NixOS/nixpkgs/issues/63768

Forwarding remains enabled for now, need to determine its effects on
virtualization, if any.
2019-07-04 19:24:44 +02:00
Joachim Fasting c233e24d54
nixos/hardened: disable ftrace by default 2019-07-04 19:24:41 +02:00
Joachim Fasting 48ff4f1197
nixos/hardened: use graphene-hardened malloc by default 2019-05-07 13:45:39 +02:00
Elis Hirwing d1c2805eb5
profiles/graphical.nix: Enable pulseaudio for virtualbox appliances 2019-02-22 07:23:59 +01:00
danbst 27982b408e types.optionSet: deprecate and remove last usages 2019-01-31 00:41:10 +02:00
Profpatsch c8c53fcb11 modules/profiles/minimal: sound is disabled by default
The option is `false` by default since
e349ccc77f, so we don’t need to mention
it explicitely in these minimal configs.
2019-01-13 13:47:36 +01:00
Joachim Fasting 167578163a
nixos/hardened profile: always enable pti 2019-01-05 14:07:39 +01:00
Joachim Fasting 3f1f443125
nixos/hardened profile: slab/slub hardening
slab_nomerge may reduce surface somewhat

slub_debug is used to enable additional sanity checks and "red zones" around
allocations to detect read/writes beyond the allocated area, as well as
poisoning to overwrite free'd data.

The cost is yet more memory fragmentation ...
2019-01-05 14:07:37 +01:00
Joachim Fasting ea4f371627
nixos/security/misc: expose SMT control option
For the hardened profile disable symmetric multi threading.  There seems to be
no *proven* method of exploiting cache sharing between threads on the same CPU
core, so this may be considered quite paranoid, considering the perf cost.
SMT can be controlled at runtime, however.  This is in keeping with OpenBSD
defaults.

TODO: since SMT is left to be controlled at runtime, changing the option
definition should take effect on system activation.  Write to
/sys/devices/system/cpu/smt/control
2018-12-27 15:00:49 +01:00
Joachim Fasting e9761fa327
nixos/security/misc: expose l1tf mitigation option
For the hardened profile enable flushing whenever the hypervisor enters the
guest, but otherwise leave at kernel default (conditional flushing as of
writing).
2018-12-27 15:00:48 +01:00
Joachim Fasting 84fb8820db
nixos/security/misc: factor out protectKernelImage
Introduces the option security.protectKernelImage that is intended to control
various mitigations to protect the integrity of the running kernel
image (i.e., prevent replacing it without rebooting).

This makes sense as a dedicated module as it is otherwise somewhat difficult
to override for hardened profile users who want e.g., hibernation to work.
2018-12-27 15:00:47 +01:00
Graham Christensen 6db866cbd2
Revert "zfs cannot be distributed. Disabling it in the isos."
ZFS's popularity is growing, and not including it by default is a
bit frustrating. On top of that, the base iso includes ZFS
_anyway_ due to other packages depending upon it.

I think we're in the clear to do this on the basis that Oracle
probably doesn't care, it is probably fine (the SFLC agrees) and
we're a small fish. If a copyright holder asks us to, we can
definitely revert it again.

This reverts commit 33d07c7ea9.
2018-11-26 17:51:18 -05:00
Ding Xiang Fei b011049cf6 Merge branch 'master' of https://github.com/nixos/nixpkgs into tarball-closureinfo 2018-11-26 12:04:07 +08:00
Joachim Fasting 6a7f02d89d
nixos/hardened: restrict access to nix daemon 2018-11-24 16:06:21 +01:00
Ding Xiang Fei ceececbd04 Merge branch 'master' of https://github.com/nixos/nixpkgs into tarball-closureinfo 2018-11-14 12:32:28 +08:00
Ding Xiang Fei 4259f7575e use closure-info for building system tarball 2018-11-07 12:52:53 +08:00
Eelco Dolstra be6e4b8af8
Merge pull request #49326 from c0bw3b/nixos/installation-device
nixos/installation-device: set GC initial heap size to 1MB
2018-10-30 14:13:59 +01:00
Matthew Bauer a943bc9e04
Merge pull request #48801 from matthewbauer/cloneConfigExtra
ova: add cloneConfigExtra option
2018-10-28 19:05:16 -05:00
Renaud fc476599ad
installation-device: set GC initial heap size to 1MB
100000 (100kB) is too aggressive (too low) and gets ignored by the GC
See issue #43339
2018-10-28 10:48:00 +01:00
Tuomas Tynkkynen cc92fc0a83 nixos/installation-device: Move systemPackages additions to profiles/base
Other package additions are there as well.
2018-10-27 15:17:13 +03:00
Tuomas Tynkkynen 717206010f nixos/installer: Drop extra copy of w3m
The nixos-manual service already uses w3m-nographics for a variant that
drops unnecessary junk like various image libraries.

iso_minimal closure (i.e. uncompressed) goes from 1884M -> 1837M.
2018-10-27 13:16:30 +03:00
Matthew Bauer 1902adb437 ova: add cloneConfigExtra option
Customize virtualbox ovas to contain a clone config option giving some
useful hints.

Fixes #38429
2018-10-21 14:52:49 -05:00
Joachim F 205aff5a65
Merge pull request #48439 from joachifm/hardened-misc
nixos/security/misc: init
2018-10-15 21:25:42 +00:00
Joachim Fasting f4ea22e5de
nixos/security/misc: init
A module for security options that are too small to warrant their own module.

The impetus for adding this module is to make it more convenient to override
the behavior of the hardened profile wrt user namespaces.
Without a dedicated option for user namespaces, the user needs to
1) know which sysctl knob controls userns
2) know how large a value the sysctl knob needs to allow e.g.,
   Nix sandbox builds to work

In the future, other mitigations currently enabled by the hardened profile may
be promoted to options in this module.
2018-10-15 23:11:37 +02:00
Joachim Fasting cb845123d4
nixos/hardened: add myself to maintainers 2018-10-15 01:33:33 +02:00
aszlig c5bb43188d
nixos: Fix eval error for documentation.nixos
Introduced by 0f3b89bbed.

If services.nixosManual.showManual is enabled and
documentation.nixos.enable is not, there is no
config.system.build.manual available, so evaluation fails. For example
this is the case for the installer tests.

There is however an assertion which should catch exactly this, but it
isn't thrown because the usage of config.system.build.manual is
evaluated earlier than the assertions.

So I split the assertion off into a separate mkIf to make sure it is
shown appropriately and also fixed the installation-device profile to
enable documentation.nixos.

Signed-off-by: aszlig <aszlig@nix.build>
Cc: @oxij
2018-09-25 23:39:44 +02:00
Michael Raskin 61abf3bbd9
Merge pull request #47298 from oxij/nixos/doc-in-installer
nixos: fix fallout from #46193
2018-09-25 09:00:43 +00:00
xeji bc22265e65
Merge pull request #47296 from matthewbauer/closure-size-reductions
ISO/OVA closure size reductions
2018-09-24 23:21:02 +02:00
Jan Malakhovski 1a6ce11518 nixos: doc: fix minimal profile and installer configs 2018-09-24 21:07:59 +00:00
Matthew Bauer 2b7d6e463e nixos: don’t enableQt4Support for installer profile
This is already done in
installer/cd-dvd/installation-cd-graphical-kde.nix but not in
profiles/graphical.nix. Related to #47256.
2018-09-24 15:07:25 -05:00
Samuel Dionne-Riel ebf041d4bd
Merge pull request #46193 from oxij/nixos/manual-to-doc
nixos: doc: implement #12542
2018-09-24 00:09:23 -04:00
Jan Malakhovski 0f3b89bbed nixos: doc: move non-service parts of service.nixosManual to documentation.nixos 2018-09-23 20:50:47 +00:00
Matthew Bauer 94bec239d5 nixos: make firefox default browser
Without this the graphical installer has no way to open the manual.
You can fix it yourself by installing any HTML browser but this might
be unfamiliar to users new to NixOS and without any other way to open
the manual. The downside is it will also increase download sizes.

Fixes #46537
2018-09-22 23:33:16 -05:00
volth d4ef7c6772 usb-storage -> uas
Following up https://github.com/NixOS/nixpkgs/pull/23665

Bootable USB-drives are not limited to ISO-images, there can be "normal" MBR/GPT-partitioned disk connected via USB-rack.
Also, "uas" implies "usb-storage", so there is no need to mention both.
2018-08-23 01:42:34 +00:00
Tuomas Tynkkynen 58dc26180f nixos: Fix iso_graphical evaluation
I broke it:
in job ‘nixos.iso_graphical.x86_64-linux’:
The option `services.udisks2.enable' has conflicting definitions, in `/nix/store/bwcjw1ddj94q83vbbnq1nnrs5aisaw59-source/nixos/modules/profiles/installation-device.nix' and `/nix/store/bwcjw1ddj94q83vbbnq1nnrs5aisaw59-source/nixos/modules/services/x11/desktop-managers/plasma5.nix'.
2018-08-17 07:43:58 +03:00
Tuomas Tynkkynen 571fb74f44 installer: Disable udisks
Due to whoever-knows-what, udisks nowadays pulls in GTK+ et al. But it
shouldn't be needed anyway in the installer, so disable it.
2018-08-17 06:56:51 +03:00
Bob van der Linden e1da32d887 set initialHashedPassword in installation-device.nix 2018-08-07 14:45:50 +02:00
volth 2e979e8ceb [bot] nixos/*: remove unused arguments in lambdas 2018-07-20 20:56:59 +00:00
volth 87f5930c3f [bot]: remove unreferenced code 2018-07-20 18:48:37 +00:00
Florian Klink fff5923686 nixos/modules: users.(extraUsers|extraGroup->users|group) 2018-06-30 03:02:58 +02:00