github.com/bugraaydogar/snapd@v0.0.0-20210315170335-8c70bb858939/interfaces/builtin/kernel_module_observe.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2018 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package builtin
    21  
    22  const kernelModuleObserveSummary = `allows querying of kernel modules`
    23  
    24  const kernelModuleObserveBaseDeclarationSlots = `
    25    kernel-module-observe:
    26      allow-installation:
    27        slot-snap-type:
    28          - core
    29      deny-auto-connection: true
    30  `
    31  
    32  const kernelModuleObserveConnectedPlugAppArmor = `
    33  # Description: Allow querying of kernel modules.
    34  /{,usr/}bin/kmod ixr, # seccomp and no SYS_MODULE prevents loading/removing
    35  @{PROC}/modules r,
    36  
    37  # Required to use SYSLOG_ACTION_READ_ALL and SYSLOG_ACTION_SIZE_BUFFER when
    38  # /proc/sys/kernel/dmesg_restrict is '1' (syslog(2)). These operations are
    39  # required to verify kernel modules that are loaded. This also exposes kernel
    40  # pointer addresses via %pK format specifiers for processes running with this
    41  # capability when accessing /proc/kallsyms, etc when kptr_restrict=1.
    42  capability syslog,
    43  
    44  # Allow reading information about loaded kernel modules
    45  /sys/module/{,**} r,
    46  /etc/modprobe.d/{,**} r,
    47  /lib/modprobe.d/{,**} r,
    48  `
    49  
    50  func init() {
    51  	registerIface(&commonInterface{
    52  		name:                  "kernel-module-observe",
    53  		summary:               kernelModuleObserveSummary,
    54  		implicitOnCore:        true,
    55  		implicitOnClassic:     true,
    56  		baseDeclarationSlots:  kernelModuleObserveBaseDeclarationSlots,
    57  		connectedPlugAppArmor: kernelModuleObserveConnectedPlugAppArmor,
    58  	})
    59  }