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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
const kernelModuleControlSummary = `allows insertion, removal and querying of kernel modules`
const kernelModuleControlBaseDeclarationPlugs = `
kernel-module-control:
allow-installation: false
deny-auto-connection: true
`
const kernelModuleControlBaseDeclarationSlots = `
kernel-module-control:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const kernelModuleControlConnectedPlugAppArmor = `
# Description: Allow insertion, removal and querying of modules.
capability sys_module,
@{PROC}/modules r,
/{,usr/}bin/kmod ixr,
# FIXME: moved to physical-memory-observe (will be removed when using different
# policies for different bases)
/dev/mem r,
# Required to use SYSLOG_ACTION_READ_ALL and SYSLOG_ACTION_SIZE_BUFFER when
# /proc/sys/kernel/dmesg_restrict is '1' (syslog(2)). These operations are
# required to verify kernel modules that are loaded. This also exposes kernel
# pointer addresses via %pK format specifiers for processes running with this
# capability when accessing /proc/kallsyms, etc when kptr_restrict=1.
capability syslog,
# Allow reading information about loaded kernel modules
/sys/module/{,**} r,
/etc/modprobe.d/{,**} r,
/{,usr/}lib/modprobe.d/{,**} r,
`
const kernelModuleControlConnectedPlugSecComp = `
# Description: Allow insertion, removal and querying of modules.
init_module
finit_module
delete_module
`
var kernelModuleControlConnectedPlugUDev = []string{`KERNEL=="mem"`}
func init() {
registerIface(&commonInterface{
name: "kernel-module-control",
summary: kernelModuleControlSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationPlugs: kernelModuleControlBaseDeclarationPlugs,
baseDeclarationSlots: kernelModuleControlBaseDeclarationSlots,
connectedPlugAppArmor: kernelModuleControlConnectedPlugAppArmor,
connectedPlugSecComp: kernelModuleControlConnectedPlugSecComp,
connectedPlugUDev: kernelModuleControlConnectedPlugUDev,
usesSysModuleCapability: true,
})
}
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