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|
#!/bin/env python3
# crun - OCI runtime written in C
#
# Copyright (C) 2017, 2018, 2019 Giuseppe Scrivano <giuseppe@scrivano.org>
# crun is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# crun 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 crun. If not, see <http://www.gnu.org/licenses/>.
import os
import subprocess
import shutil
from tests_utils import *
def test_mode_device():
if is_rootless():
return 77
# verify the umask doesn't affect the result
os.umask(0o22)
for have_userns in [True, False]:
conf = base_config()
add_all_namespaces(conf, userns=have_userns)
if have_userns:
fullMapping = [
{
"containerID": 0,
"hostID": 0,
"size": 4294967295
}
]
conf['linux']['uidMappings'] = fullMapping
conf['linux']['gidMappings'] = fullMapping
conf['process']['args'] = ['/init', 'mode', '/dev/foo']
conf['linux']['devices'] = [{"path": "/dev/foo", "type": "b", "major": 1, "minor": 5, "uid": 10, "gid": 11, "fileMode": 0o157},]
try:
expected = "157"
out = run_and_get_output(conf)
if expected not in out[0]:
sys.stderr.write("# device mode test failed with userns=%s: expected '%s' in output\n" % (have_userns, expected))
sys.stderr.write("# actual output: %s\n" % out[0])
sys.stderr.write("# device config: %s\n" % conf['linux']['devices'][0])
return -1
except Exception as e:
sys.stderr.write("# device mode test failed with userns=%s: %s\n" % (have_userns, str(e)))
return -1
return 0
def test_owner_device():
if is_rootless():
return 77
for have_userns in [True, False]:
conf = base_config()
add_all_namespaces(conf, userns=have_userns)
if have_userns:
fullMapping = [
{
"containerID": 0,
"hostID": 0,
"size": 4294967295
}
]
conf['linux']['uidMappings'] = fullMapping
conf['linux']['gidMappings'] = fullMapping
conf['process']['args'] = ['/init', 'owner', '/dev/foo']
conf['linux']['devices'] = [{"path": "/dev/foo", "type": "b", "major": 1, "minor": 5, "uid": 10, "gid": 11},]
try:
expected = "10:11"
out = run_and_get_output(conf)
if expected not in out[0]:
sys.stderr.write("# device owner test failed with userns=%s: expected '%s' in output\n" % (have_userns, expected))
sys.stderr.write("# actual output: %s\n" % out[0])
sys.stderr.write("# device config: %s\n" % conf['linux']['devices'][0])
return -1
except Exception as e:
sys.stderr.write("# device owner test failed with userns=%s: %s\n" % (have_userns, str(e)))
return -1
return 0
def test_deny_devices():
if is_rootless():
return 77
try:
os.stat("/dev/fuse")
except:
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'open', '/dev/fuse']
conf['linux']['resources'] = {"devices": [{"allow": False, "access": "rwm"}]}
dev = {
"destination": "/dev",
"type": "bind",
"source": "/dev",
"options": [
"rbind",
"rw"
]
}
conf['mounts'].append(dev)
try:
run_and_get_output(conf)
except Exception as e:
if "Operation not permitted" in e.output.decode():
return 0
return -1
def test_create_or_bind_mount_device():
try:
os.stat("/dev/fuse")
except:
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'access', '/dev/fuse']
conf['linux']['devices'] = [{ "path": "/dev/fuse",
"type": "c",
"major": 10,
"minor": 229,
"fileMode": 0o775,
"uid": 0,
"gid": 0
}]
try:
run_and_get_output(conf)
except Exception as e:
sys.stderr.write("# " + str(e) + "\n")
return -1
return 0
def test_allow_device():
if is_rootless():
return 77
try:
os.stat("/dev/fuse")
except:
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'open', '/dev/fuse']
conf['linux']['resources'] = {"devices": [{"allow": False, "access": "rwm"},
{"allow": True, "type": "c", "major": 10, "minor": 229, "access": "r"}]}
dev = {
"destination": "/dev",
"type": "bind",
"source": "/dev",
"options": [
"rbind",
"rw"
]
}
conf['mounts'].append(dev)
try:
run_and_get_output(conf)
except Exception as e:
return -1
return 0
def test_allow_access():
if is_rootless():
return 77
try:
os.stat("/dev/fuse")
except:
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'access', '/dev/fuse']
conf['linux']['resources'] = {"devices": [{"allow": False, "access": "rwm"},
{"allow": True, "type": "c", "major": 10, "minor": 229, "access": "rw"}]}
dev = {
"destination": "/dev",
"type": "bind",
"source": "/dev",
"options": [
"rbind",
"rw"
]
}
conf['mounts'].append(dev)
try:
run_and_get_output(conf)
except Exception as e:
return -1
return 0
def test_mknod_device():
if is_rootless():
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'true']
conf['linux']['devices'] = [{"path": "/foo-dev", "type": "b", "major": 10, "minor": 229},
{"path": "/subdir/foo-dev", "type": "b", "major": 10, "minor": 229},]
try:
run_and_get_output(conf)
except Exception as e:
return -1
return 0
def test_trailing_slash_mknod_device():
if is_rootless():
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'true']
conf['linux']['devices'] = [{"path": "/mnt/", "type": "b", "major": 10, "minor": 229}]
try:
run_and_get_output(conf)
except Exception as e:
return -1
return 0
def test_net_devices():
if is_rootless():
return 77
ip_path = shutil.which("ip")
if ip_path is None:
sys.stderr.write("# ip command not found\n")
return 77
current_netns = os.open("/proc/self/ns/net", os.O_RDONLY)
try:
os.unshare(os.CLONE_NEWNET)
for specify_broadcast in [True, False]:
for specify_name in [True, False]:
sys.stderr.write("# test_net_devices: creating testdevice with specify_broadcast=%s, specify_name=%s\n" % (specify_broadcast, specify_name))
result = subprocess.run(["ip", "link", "add", "testdevice", "type", "dummy"], capture_output=True, text=True)
if result.returncode != 0:
sys.stderr.write("# ip link add failed: %s\n" % result.stderr)
return -1
if specify_broadcast:
result = subprocess.run(["ip", "addr", "add", "10.1.2.3/24", "brd", "10.1.2.254", "dev", "testdevice"], capture_output=True, text=True)
if result.returncode != 0:
sys.stderr.write("# ip addr add with broadcast failed: %s\n" % result.stderr)
return -1
else:
result = subprocess.run(["ip", "addr", "add", "10.1.2.3/24", "dev", "testdevice"], capture_output=True, text=True)
if result.returncode != 0:
sys.stderr.write("# ip addr add without broadcast failed: %s\n" % result.stderr)
return -1
conf = base_config()
add_all_namespaces(conf)
# Add network capabilities needed for network device operations
conf['process']['capabilities'] = {
"bounding": [
"CAP_NET_ADMIN",
"CAP_NET_RAW",
"CAP_SYS_ADMIN"
],
"effective": [
"CAP_NET_ADMIN",
"CAP_NET_RAW",
"CAP_SYS_ADMIN"
],
"inheritable": [
"CAP_NET_ADMIN",
"CAP_NET_RAW",
"CAP_SYS_ADMIN"
],
"permitted": [
"CAP_NET_ADMIN",
"CAP_NET_RAW",
"CAP_SYS_ADMIN"
]
}
if specify_name:
conf['process']['args'] = ['/init', 'ip', 'newtestdevice']
conf['linux']['netDevices'] = {
"testdevice": {
"name": "newtestdevice"
}
}
else:
conf['process']['args'] = ['/init', 'ip', 'testdevice']
conf['linux']['netDevices'] = {
"testdevice": {
}
}
try:
out = run_and_get_output(conf)
sys.stderr.write("# test_net_devices: specify_broadcast=%s, specify_name=%s\n" % (specify_broadcast, specify_name))
sys.stderr.write("# test_net_devices: output: %s\n" % repr(out[0]))
if "address: 10.1.2.3" not in out[0]:
sys.stderr.write("# address not found in output\n")
sys.stderr.write("# full output: %s\n" % repr(out[0]))
return 1
if specify_broadcast:
if "broadcast: 10.1.2.254" not in out[0]:
sys.stderr.write("# broadcast address not found in output\n")
sys.stderr.write("# full output: %s\n" % repr(out[0]))
return 1
else:
if "broadcast" in out[0]:
sys.stderr.write("# broadcast address found in output when it shouldn't be\n")
sys.stderr.write("# full output: %s\n" % repr(out[0]))
return 1
except Exception as e:
sys.stderr.write("# test_net_devices exception: %s\n" % str(e))
return -1
finally:
# Clean up the test device
subprocess.run(["ip", "link", "del", "testdevice"], capture_output=True)
finally:
os.setns(current_netns, os.CLONE_NEWNET)
os.close(current_netns)
return 0
def test_mknod_fifo_device():
if is_rootless():
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'isfifo', '/dev/testfifo']
conf['linux']['devices'] = [
{"path": "/dev/testfifo", "type": "p", "fileMode": 0o0660, "uid": 1, "gid": 2}
]
try:
run_and_get_output(conf)
except Exception as e:
sys.stderr.write("# test_mknod_fifo_device failed: %s\n" % e)
return -1
return 0
def test_mknod_char_device():
if is_rootless():
return 77
conf = base_config()
add_all_namespaces(conf)
conf['process']['args'] = ['/init', 'ischar', '/dev/testchar']
conf['linux']['devices'] = [
{"path": "/dev/testchar", "type": "c", "major": 251, "minor": 1, "fileMode": 0o0640, "uid": 3, "gid": 4}
]
try:
run_and_get_output(conf)
except Exception as e:
sys.stderr.write("# test_mknod_char_device failed: {e}\n")
return -1
return 0
def test_allow_device_read_only():
if is_rootless():
return 77
try:
# Best effort load
subprocess.run(["modprobe", "null_blk", "nr_devices=1"])
except:
pass
try:
st = os.stat("/dev/nullb0")
major, minor = os.major(st.st_rdev), os.minor(st.st_rdev)
except:
return 77
conf = base_config()
add_all_namespaces(conf)
conf['linux']['devices'] = [{
"path": "/dev/controlledchar",
"type": "b",
"major": major,
"minor": minor,
"fileMode": 0o0666
}]
conf['linux']['resources'] = {
"devices": [
{"allow": False, "access": "rwm"},
{"allow": True, "type": "b", "major": major, "minor": minor, "access": "r"},
]
}
conf['process']['args'] = ['/init', 'open', '/dev/controlledchar']
try:
run_and_get_output(conf)
except Exception as e:
sys.stderr.write("# test_allow_device_read_only failed: %s\n" % e)
return -1
conf['process']['args'] = ['/init', 'openwronly', '/dev/controlledchar']
try:
run_and_get_output(conf)
sys.stderr.write("# test_allow_device_read_only: write access was unexpectedly allowed.\n")
return 1
except Exception as e:
output_str = getattr(e, 'output', b'').decode(errors='ignore')
if "Operation not permitted" in output_str or "Permission denied" in output_str:
return 0
else:
sys.stderr.write("# test_allow_device_read_only (write attempt) failed with: %s, output: %s\n" % (e, output_str))
return 1
return 1
all_tests = {
"mknod-fifo-device": test_mknod_fifo_device,
"mknod-char-device": test_mknod_char_device,
"allow-device-read-only": test_allow_device_read_only,
"owner-device" : test_owner_device,
"deny-devices" : test_deny_devices,
"allow-device" : test_allow_device,
"allow-access" : test_allow_access,
"mknod-device" : test_mknod_device,
"mode-device" : test_mode_device,
"create-or-bind-mount-device" : test_create_or_bind_mount_device,
"handle-device-trailing-slash" : test_trailing_slash_mknod_device,
"net-devices" : test_net_devices,
}
if __name__ == "__main__":
tests_main(all_tests)
|
