apparmor.d/profiles/xorg

# apparmor.d - Full set of apparmor profiles
# Copyright (C) 2017-2021 Mikhail Morfikov
# SPDX-License-Identifier: GPL-2.0-only

abi <abi/3.0>,

include <tunables/global>

# The attach_disconnected flag is needed when xserver is started via startx, or the mouse/keyboard
# won't work.
#  operation="getattr" info="Failed name lookup - disconnected path" error=-13 profile="xorg"
#  name="dev/dri/card*"
#  operation="getattr" info="Failed name lookup - disconnected path" error=-13 profile="xorg"
#  name="dev/input/event*"
@{exec_path}  = /{usr/,}bin/X
@{exec_path} += /{usr/,}bin/Xorg
@{exec_path} += /{usr/,}lib/xorg/Xorg
profile xorg @{exec_path} flags=(attach_disconnected) {
  include <abstractions/base>
  include <abstractions/opencl-intel>
  include <abstractions/vulkan>
  include <abstractions/fonts>
  include <abstractions/fontconfig-cache-read>
  include <abstractions/freedesktop.org>
  include <abstractions/mesa>
  include <abstractions/nameservice-strict>
  include <abstractions/deny-root-dir-access>

  # When the Xserver is started via startx as a regular user, there's no need for any of the
  # following CAPs. When some DM is used instead, some of the CAPs are needed.
  # Tested so far with LightDM and SDDM.
  #
  # In the case of most of the DMs, the sys_admin CAP is needed becasue if it's denied then Xserver
  # has the following issue:
  #  (EE) modeset(0): drmSetMaster failed: Permission denied
  #capability sys_admin,
  #
  # It looks like the Xserver started via LightDM can work just fine without the rest of the
  # following CAPs.
  #
  # This has something to do with attaching the System V shared memory segments:
  #  shmat(131103, NULL, 0)            = -1 EACCES (Permission denied)
  #capability ipc_owner,
  #
  # For SDDM to read some /proc/ and /sys/ files:
  #capability dac_read_search,
  #
  # These can be denied.
  #deny capability dac_override,
  #deny capability sys_rawio,
  deny capability sys_nice,

  # For KDE/SDDM
  #capability sys_tty_config,

  signal (send) set=(usr1),

  signal (receive) peer=lightdm,
  signal (receive) peer=sddm,
  signal (receive) peer=xinit,

  network netlink raw,

  @{exec_path} mrix,

  /{usr/,}bin/{,ba,da}sh rix,
  /{usr/,}bin/xkbcomp    rPx,
  /{usr/,}bin/pkexec     rPx,

  # Xorg files
  /etc/X11/{,**} r,
  /{usr/,}lib/xorg/ r,
  /{usr/,}lib/xorg/modules/ r,
  /{usr/,}lib/xorg/modules/** mr,

  #
  /var/lib/xkb/server-[0-9]*.xkm rw,

  # Log files
  owner /var/log/Xorg.[0-9].log{,.old} rw,
  owner /var/log/Xorg.pid-@{pid}.log{,.old} rw,
  owner @{HOME}/ r,
  owner @{HOME}/.local/share/xorg/ rw,
  owner @{HOME}/.local/share/xorg/Xorg.[0-9].log{,.old} rw,
  owner @{HOME}/.local/share/xorg/Xorg.pid-@{pid}.log{,.old} rw,
  owner @{HOME}/.xsession-errors w,

  # TMP files
        /tmp/ r,
  owner /tmp/.X11-unix/ rw,
  owner /tmp/.X11-unix/X* rwk,
  owner /tmp/.tX[0-9]-lock rwk,
  owner /tmp/.X[0-9]-lock rwkl -> /tmp/.tX[0-9]-lock,
  owner /tmp/server-* rwk,
  owner /tmp/serverauth.* r,

  # Graphic card modules
  /dev/vga_arbiter rw,
  @{sys}/module/i915/{,**} r,

  # Input devices (keyboard, mouse, etc)
  /dev/input/event[0-9]* rw,

  /usr/share/libinput/ r,
  /usr/share/libinput/[0-9][0-9]-*.quirks r,

  # Screen backlight
  @{sys}/devices/pci[0-9]*/**/backlight/*/{,max_}brightness r,
  @{sys}/devices/pci[0-9]*/**/backlight/*/brightness rw,

  # Display Xserver on a specific TTY
  owner /dev/tty[0-9]* rw,

  # Needed for SDDM display manager
  @{run}/sddm/{,**} rw,

  # Needed for LightDM display manager
  @{run}/lightdm/{,**} rw,
  /var/log/lightdm/x-*.log* rw,

  @{sys}/bus/ r,
  @{sys}/bus/pci/devices/ r,
  @{sys}/class/ r,
  @{sys}/class/{tty,input,drm}/ r,
  @{sys}/devices/**/{uevent,name,id,config} r,
  @{sys}/devices/pci[0-9]*/**/ r,
  @{sys}/devices/pci[0-9]*/**/boot_vga r,

  @{run}/udev/data/+input* r,          # for mouse, keyboard, touchpad
  @{run}/udev/data/+platform* r,       # for ?
  @{run}/udev/data/+drm:card[0-9]-* r, # for screen outputs
  #@{run}/udev/data/+dmi* r,           # for ?
  @{run}/udev/data/+acpi* r,           # for ?
  @{run}/udev/data/+hid* r,            # for HID-Compliant Keyboard
  @{run}/udev/data/+pci* r,            # for VGA compatible controller
  @{run}/udev/data/+usb* r,            # for USB mouse and keyboard
  @{run}/udev/data/+serio* r,          # for touchpad?
  @{run}/udev/data/c4:[0-9]*   r,      # for /dev/tty[0-9]*
  @{run}/udev/data/c5:[0-9]*   r,      # for /dev/tty, /dev/console, /dev/ptmx
  @{run}/udev/data/c13:[0-9]*  r,      # for /dev/input/*
  @{run}/udev/data/c189:[0-9]* r,      # for /dev/bus/usb/**
  @{run}/udev/data/c226:[0-9]* r,      # for /dev/dri/card*

  @{PROC}/@{pids}/cmdline r,
  @{PROC}/cmdline r,
  @{PROC}/mtrr rw,

  #
  /dev/shm/shmfd-* rw,
  /dev/shm/#[0-9]*[0-9] rw,

  include if exists <local/xorg>
}