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# Copyright (c) 2026 The FreeBSD Foundation
#
# SPDX-License-Identifier: BSD-2-Clause
#
# This software was developed by Olivier Certner <olce@FreeBSD.org> at
# Kumacom SARL under sponsorship from the FreeBSD Foundation.
SJ_JID_FILE=sj.jid
atf_test_case concurrent_rules_exec_paths_changes
concurrent_rules_exec_paths_changes_head()
{
atf_set descr "Consistency of rules and exec paths changes on same jail"
}
concurrent_rules_exec_paths_changes_body()
{
local rules exec_paths rules_es exec_paths_es
for I in $(jot - 1 1000); do
sysctl_set_and_check_rules "uid=$I>uid=1001"
done &
rules=$!
for I in $(jot - 1 1000); do
sysctl_set_and_check_exec_paths /nowhere/nonexistent$I
done &
exec_paths=$!
wait $rules
rules_es=$?
wait $exec_paths
exec_paths_es=$?
# atf_check called in the asynchronous AND-OR lists above causes exit of the
# subshells and also a write to the ATF result file. These writes are
# concurrent and may cause the result file to be malformed. Consequently,
# it is important that, once execution becomes sequential again, atf_fail() is
# called again (and not just exit()).
if [ $rules_es -ne 0 ] || [ $exec_paths_es -ne 0 ]; then
atf_fail "Rules exit status: $rules_es, \
exec paths exit status: $exec_paths_es"
fi
}
atf_test_case inheritance cleanup
inheritance_head()
{
atf_set descr "Simple inheritance test (values propagated to child jail)"
}
inheritance_body()
{
local sj rules exec_paths
# For the sake of not running the test under Kyua
mac_do_ensure_disabled
sj=$(launch_subjail)
echo $sj > "${SJ_JID_FILE}"
jail -m jid=$sj ${ROOT_JAIL_PARAM}=inherit
JEXEC="jexec $sj"
mac_do_check_disabled
JEXEC=
rules="uid=1001>uid=0"
sysctl_set_and_check_rules $rules
JEXEC="jexec $sj"
sysctl_check_rules $rules
JEXEC=
rules="gid=1001>uid=0"
sysctl_set_and_check_rules $rules
JEXEC="jexec $sj"
sysctl_check_rules $rules
JEXEC=
# Not really necessary, just to keep mac_do(4) disabled
sysctl_set_and_check_rules ""
exec_paths="/nowhere/nonexistent"
sysctl_set_and_check_exec_paths $exec_paths
JEXEC="jexec $sj"
sysctl_check_exec_paths $exec_paths
JEXEC=
exec_paths="$MDO"
sysctl_set_and_check_exec_paths $exec_paths
JEXEC="jexec $sj"
sysctl_check_exec_paths $exec_paths
JEXEC=
}
inheritance_cleanup()
{
# We clean up our subjail manually just for the sake of launching this test
# with atf-sh. Kyua is informed that these tests should run in a jail, and
# kills it automatically after the test, which kills all subjails. It is
# annoying that atf-sh does not offer a more practical way to pass
# information from the body to the cleanup part than a file.
jail -r $(cat "${SJ_JID_FILE}")
rm -f "${SJ_JID_FILE}"
}
atf_test_case inheritance_relax_parent_jail cleanup
inheritance_relax_parent_jail_head()
{
atf_set descr \
"Test sequential consistency in a \"relax parent rules\" scenario"
}
inheritance_relax_parent_jail_body()
{
local sj rules exec_paths subproc
sj=$(launch_subjail)
echo $sj > "${SJ_JID_FILE}"
jail -m jid=$sj ${ROOT_JAIL_PARAM}=inherit
rules="uid=1001>uid=0"
sysctl_set_and_check_rules $rules
# Additional inheritance sanity check
JEXEC="jexec $sj"
sysctl_check_rules $rules
JEXEC=
exec_paths="$MDO"
sysctl_set_and_check_exec_paths $exec_paths
# Additional inheritance sanity check
JEXEC="jexec $sj"
sysctl_check_exec_paths $exec_paths
JEXEC=
# Launch a process that tries to become 'root' from user 1002, and verify
# that this always fails.
{ for I in $(jot - 1 1000); do
jexec $sj "$MDO" -u 1002 -g 1002 -G 1002 "$MDO" -i true 2>/dev/null &&
exit 1
done; true; } &
subproc=$!
# Decouple the subjail from the parent jail, copying its parameters
jail -m jid=$sj ${ROOT_JAIL_PARAM}=new
# Allow user 1002 to become 'root' on the parent jail
sysctl_set_and_check_rules "$rules;uid=1002>uid=0"
JEXEC="jexec $sj"
# Additional sanity check (that rules of the subjail are now independent)
[ "$(sysctl_rules)" == $rules ] || atf_fail "Rules not copied"
[ "$(sysctl_exec_paths)" == $exec_paths ] ||
atf_fail "Exec paths not copied"
JEXEC=
wait $subproc || atf_fail "A transition wrongly succeeded in the subjail!"
}
inheritance_relax_parent_jail_cleanup()
{
# See inheritance_cleanup() for explanations
jail -r $(cat "${SJ_JID_FILE}")
rm -f "${SJ_JID_FILE}"
}
atf_test_case same_knob_and_jail_parameter cleanup
same_knob_and_jail_parameter_head()
{
atf_set descr \
"Corresponding sysctl knobs and jail parameters have same value"
}
same_knob_and_jail_parameter_body()
{
local sj rules exec_paths subproc
sj=$(launch_subjail)
echo $sj > "${SJ_JID_FILE}"
# Set sysctl knobs, observe parameters
rules="uid=19999>uid=21700"
exec_paths="/improbable/path/he"
JEXEC="jexec $sj"
sysctl_set_and_check_rules $rules
sysctl_set_and_check_exec_paths $exec_paths
JEXEC=
atf_check -o inline:"$rules\n" jls -j $sj ${RULES_JAIL_PARAM}
atf_check -o inline:"${exec_paths}\n" jls -j $sj ${EXEC_PATHS_JAIL_PARAM}
# Set parameters, observe knobs
rules="uid=128000>uid=-1"
exec_paths="/hello/i_ve/changed"
jail -m jid=$sj ${RULES_JAIL_PARAM}=$rules \
${EXEC_PATHS_JAIL_PARAM}=${exec_paths}
JEXEC="jexec $sj"
sysctl_check_rules $rules
sysctl_check_exec_paths $exec_paths
JEXEC=
}
same_knob_and_jail_parameter_cleanup()
{
# See inheritance_cleanup() for explanations
jail -r $(cat "${SJ_JID_FILE}")
rm -f "${SJ_JID_FILE}"
}
atf_init_test_cases()
{
. $(atf_get_srcdir)/common.sh
atf_require_prog jot
# Needs an absolute path for mdo(1), to set it in exec_paths
atf_require_prog "$MDO"
atf_add_test_case concurrent_rules_exec_paths_changes
atf_add_test_case inheritance
atf_add_test_case inheritance_relax_parent_jail
atf_add_test_case same_knob_and_jail_parameter
}
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