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test-livepatch.sh

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com>

. $(dirname $0)/functions.sh

MOD_LIVEPATCH=test_klp_livepatch
MOD_REPLACE=test_klp_atomic_replace

set_dynamic_debug

# TEST: basic function patching
# - load a livepatch that modifies the output from /proc/cmdline and
#   verify correct behavior
# - unload the livepatch and make sure the patch was removed

echo -n "TEST: basic function patching ... "
dmesg -C

load_lp $MOD_LIVEPATCH

if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
	echo -e "FAIL\n\n"
	die "livepatch kselftest(s) failed"
fi

disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH

if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH: this has been live patched" ]] ; then
	echo -e "FAIL\n\n"
	die "livepatch kselftest(s) failed"
fi

check_result "% modprobe $MOD_LIVEPATCH
livepatch: enabling patch '$MOD_LIVEPATCH'
livepatch: '$MOD_LIVEPATCH': initializing patching transition
livepatch: '$MOD_LIVEPATCH': starting patching transition
livepatch: '$MOD_LIVEPATCH': completing patching transition
livepatch: '$MOD_LIVEPATCH': patching complete
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
livepatch: '$MOD_LIVEPATCH': starting unpatching transition
livepatch: '$MOD_LIVEPATCH': completing unpatching transition
livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"

# TEST: multiple livepatches
# - load a livepatch that modifies the output from /proc/cmdline and
#   verify correct behavior
# - load another livepatch and verify that both livepatches are active
# - unload the second livepatch and verify that the first is still active
# - unload the first livepatch and verify none are active

echo -n "TEST: multiple livepatches ... "
dmesg -C

load_lp $MOD_LIVEPATCH

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

load_lp $MOD_REPLACE replace=0

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

disable_lp $MOD_REPLACE
unload_lp $MOD_REPLACE

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

check_result "% modprobe $MOD_LIVEPATCH
livepatch: enabling patch '$MOD_LIVEPATCH'
livepatch: '$MOD_LIVEPATCH': initializing patching transition
livepatch: '$MOD_LIVEPATCH': starting patching transition
livepatch: '$MOD_LIVEPATCH': completing patching transition
livepatch: '$MOD_LIVEPATCH': patching complete
$MOD_LIVEPATCH: this has been live patched
% modprobe $MOD_REPLACE replace=0
livepatch: enabling patch '$MOD_REPLACE'
livepatch: '$MOD_REPLACE': initializing patching transition
livepatch: '$MOD_REPLACE': starting patching transition
livepatch: '$MOD_REPLACE': completing patching transition
livepatch: '$MOD_REPLACE': patching complete
$MOD_LIVEPATCH: this has been live patched
$MOD_REPLACE: this has been live patched
% echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
livepatch: '$MOD_REPLACE': initializing unpatching transition
livepatch: '$MOD_REPLACE': starting unpatching transition
livepatch: '$MOD_REPLACE': completing unpatching transition
livepatch: '$MOD_REPLACE': unpatching complete
% rmmod $MOD_REPLACE
$MOD_LIVEPATCH: this has been live patched
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
livepatch: '$MOD_LIVEPATCH': starting unpatching transition
livepatch: '$MOD_LIVEPATCH': completing unpatching transition
livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"

# TEST: atomic replace livepatch
# - load a livepatch that modifies the output from /proc/cmdline and
#   verify correct behavior
# - load an atomic replace livepatch and verify that only the second is active
# - remove the first livepatch and verify that the atomic replace livepatch
#   is still active
# - remove the atomic replace livepatch and verify that none are active

echo -n "TEST: atomic replace livepatch ... "
dmesg -C

load_lp $MOD_LIVEPATCH

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

load_lp $MOD_REPLACE replace=1

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

unload_lp $MOD_LIVEPATCH

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

disable_lp $MOD_REPLACE
unload_lp $MOD_REPLACE

grep 'live patched' /proc/cmdline > /dev/kmsg
grep 'live patched' /proc/meminfo > /dev/kmsg

check_result "% modprobe $MOD_LIVEPATCH
livepatch: enabling patch '$MOD_LIVEPATCH'
livepatch: '$MOD_LIVEPATCH': initializing patching transition
livepatch: '$MOD_LIVEPATCH': starting patching transition
livepatch: '$MOD_LIVEPATCH': completing patching transition
livepatch: '$MOD_LIVEPATCH': patching complete
$MOD_LIVEPATCH: this has been live patched
% modprobe $MOD_REPLACE replace=1
livepatch: enabling patch '$MOD_REPLACE'
livepatch: '$MOD_REPLACE': initializing patching transition
livepatch: '$MOD_REPLACE': starting patching transition
livepatch: '$MOD_REPLACE': completing patching transition
livepatch: '$MOD_REPLACE': patching complete
$MOD_REPLACE: this has been live patched
% rmmod $MOD_LIVEPATCH
$MOD_REPLACE: this has been live patched
% echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
livepatch: '$MOD_REPLACE': initializing unpatching transition
livepatch: '$MOD_REPLACE': starting unpatching transition
livepatch: '$MOD_REPLACE': completing unpatching transition
livepatch: '$MOD_REPLACE': unpatching complete
% rmmod $MOD_REPLACE"

exit 0

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2022-03-28 12:15:32
..	dir	-	root/root	0755	2022-03-28 12:15:32
Makefile	text/plain	194 B	root/root	0644	2022-03-07 04:07:14
functions.sh	text/x-shellscript	5.78 KB	root/root	0644	2019-11-25 12:32:01
test-callbacks.sh	text/x-shellscript	23.25 KB	root/root	0755	2019-11-25 12:32:01
test-livepatch.sh	text/x-shellscript	5.64 KB	root/root	0755	2019-11-25 12:32:01
test-shadow-vars.sh	text/x-shellscript	2.49 KB	root/root	0755	2019-11-25 12:32:01

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