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# SPDX-License-Identifier: AGPL-3.0-or-later
#
# PASST - Plug A Simple Socket Transport
# for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
# for network namespace/tap device mode
#
# contrib/apparmor/usr.bin.passt - AppArmor profile for passt(1) and pasta(1)
#
# Copyright (c) 2022 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>
abi <abi/3.0>,
include <tunables/global>
profile passt /usr/bin/passt{,.avx2} flags=(attach_disconnected) {
### Common rules for passt and pasta
include <abstractions/base>
# Alternatively: include <abstractions/nameservice>
@{etc_ro}/resolv.conf r, # get_dns(), conf.c
capability net_bind_service, # isolation.c, conf.c
capability setuid,
capability setgid,
capability sys_admin,
capability setpcap,
capability net_admin,
capability sys_ptrace,
/ r, # isolate_prefork(), isolation.c
mount "" -> "/",
mount "" -> "/tmp/",
pivot_root "/tmp/" -> "/tmp/",
umount "/",
network netlink raw, # nl_sock_init_do(), netlink.c
network inet stream, # tcp.c
network inet6 stream,
network inet dgram, # udp.c
network inet6 dgram,
network unix stream, # tap.c
network unix dgram, # __openlog(), log.c
# Alternatively: include <abstractions/user-tmp>
owner /tmp/** w, # tap_sock_unix_init(), pcap(),
# write_pidfile(),
# logfile_init()
owner @{HOME}/** w, # pcap(), write_pidfile()
/usr/bin/passt.avx2 ix, # arch_avx2_exec(), arch.c
### Rules for pasta
###
### TODO: AppArmor doesn't give us the chance to attach a separate profile
### depending on the executable symlink. That's possible with SELinux. Two
### alternatives: implement that in AppArmor, or consider aa_change_hat(2).
### With this, rules for passt(1) could be restricted significantly. Note that
### the attach_disconnected flag is not needed for passt(1).
@{PROC}/net/tcp r, # procfs_scan_listen(), util.c
@{PROC}/net/tcp6 r,
@{PROC}/net/udp r,
@{PROC}/net/udp6 r,
@{run}/user/@{uid}/netns/* r, # pasta_open_ns(), pasta.c
@{PROC}/[0-9]*/ns/net r, # pasta_wait_for_ns(),
@{PROC}/[0-9]*/ns/user r, # conf_pasta_ns()
/dev/net/tun rw, # tap_ns_tun(), tap.c
owner @{PROC}/@{pid}/gid_map w, # pasta_start_ns(), conf_ugid()
owner @{PROC}/@{pid}/setgroups w,
owner @{PROC}/@{pid}/uid_map rw,
owner @{PROC}/sys/net/ipv4/ping_group_range w, # pasta_spawn_cmd(), pasta.c
/{usr/,}bin/** Ux,
}
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