/etc/apparmor.d/usr.sbin.dnsmasq is in apparmor-profiles 2.9.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (C) 2009 John Dong <jdong@ubuntu.com>
# Copyright (C) 2010 Canonical Ltd.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 2 of the GNU General Public
# License published by the Free Software Foundation.
#
# ------------------------------------------------------------------
@{TFTP_DIR}=/var/tftp /srv/tftpboot
#include <tunables/global>
/usr/sbin/dnsmasq flags=(complain) {
#include <abstractions/base>
#include <abstractions/dbus>
#include <abstractions/nameservice>
capability net_bind_service,
capability setgid,
capability setuid,
capability dac_override,
capability net_admin, # for DHCP server
capability net_raw, # for DHCP server ping checks
network inet raw,
signal (receive) peer=/usr/sbin/libvirtd,
ptrace (readby) peer=/usr/sbin/libvirtd,
/etc/dnsmasq.conf r,
/etc/dnsmasq.d/ r,
/etc/dnsmasq.d/* r,
/etc/ethers r,
/etc/NetworkManager/dnsmasq.d/ r,
/etc/NetworkManager/dnsmasq.d/* r,
/usr/sbin/dnsmasq mr,
/{,var/}run/*dnsmasq*.pid w,
/{,var/}run/dnsmasq-forwarders.conf r,
/{,var/}run/dnsmasq/ r,
/{,var/}run/dnsmasq/* rw,
/var/lib/misc/dnsmasq.leases rw, # Required only for DHCP server usage
# access to iface mtu needed for Router Advertisement messages in IPv6
# Neighbor Discovery protocol (RFC 2461)
@{PROC}/sys/net/ipv6/conf/*/mtu r,
# for the read-only TFTP server
@{TFTP_DIR}/ r,
@{TFTP_DIR}/** r,
# libvirt config, lease and hosts files for dnsmasq
/var/lib/libvirt/dnsmasq/ r,
/var/lib/libvirt/dnsmasq/* r,
/var/lib/libvirt/dnsmasq/*.leases rw,
/var/lib/libvirt/dnsmasq/*.status* rw,
# libvirt pid files for dnsmasq
/{,var/}run/libvirt/network/ r,
/{,var/}run/libvirt/network/*.pid rw,
# libvirt lease helper
/usr/lib/libvirt/libvirt_leaseshelper ix,
/{,var/}run/leaseshelper.pid rwk,
# NetworkManager integration
/{,var/}run/nm-dns-dnsmasq.conf r,
/{,var/}run/sendsigs.omit.d/*dnsmasq.pid w,
/{,var/}run/NetworkManager/dnsmasq.conf r,
/{,var/}run/NetworkManager/dnsmasq.pid w,
# Site-specific additions and overrides. See local/README for details.
#include <local/usr.sbin.dnsmasq>
}
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