1#!/bin/bash
 2# SPDX-License-Identifier: GPL-2.0
 3# Copyright (C) 2019 Joe Lawrence <joe.lawrence@redhat.com>
 4
 5. $(dirname $0)/functions.sh
 6
 7MOD_LIVEPATCH=test_klp_livepatch
 8
 9setup_config
10
11
12# - turn ftrace_enabled OFF and verify livepatches can't load
13# - turn ftrace_enabled ON and verify livepatch can load
14# - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded
15
16start_test "livepatch interaction with ftrace_enabled sysctl"
17
18set_ftrace_enabled 0
19load_failing_mod $MOD_LIVEPATCH
20
21set_ftrace_enabled 1
22load_lp $MOD_LIVEPATCH
23if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
24	echo -e "FAIL\n\n"
25	die "livepatch kselftest(s) failed"
26fi
27
28# Check that ftrace could not get disabled when a livepatch is enabled
29set_ftrace_enabled --fail 0
30if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
31	echo -e "FAIL\n\n"
32	die "livepatch kselftest(s) failed"
33fi
34disable_lp $MOD_LIVEPATCH
35unload_lp $MOD_LIVEPATCH
36
37check_result "livepatch: kernel.ftrace_enabled = 0
38% insmod test_modules/$MOD_LIVEPATCH.ko
39livepatch: enabling patch '$MOD_LIVEPATCH'
40livepatch: '$MOD_LIVEPATCH': initializing patching transition
41livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16)
42livepatch: failed to patch object 'vmlinux'
43livepatch: failed to enable patch '$MOD_LIVEPATCH'
44livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch
45livepatch: '$MOD_LIVEPATCH': completing unpatching transition
46livepatch: '$MOD_LIVEPATCH': unpatching complete
47insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Device or resource busy
48livepatch: kernel.ftrace_enabled = 1
49% insmod test_modules/$MOD_LIVEPATCH.ko
50livepatch: enabling patch '$MOD_LIVEPATCH'
51livepatch: '$MOD_LIVEPATCH': initializing patching transition
52livepatch: '$MOD_LIVEPATCH': starting patching transition
53livepatch: '$MOD_LIVEPATCH': completing patching transition
54livepatch: '$MOD_LIVEPATCH': patching complete
55livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy
56% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
57livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
58livepatch: '$MOD_LIVEPATCH': starting unpatching transition
59livepatch: '$MOD_LIVEPATCH': completing unpatching transition
60livepatch: '$MOD_LIVEPATCH': unpatching complete
61% rmmod $MOD_LIVEPATCH"
62
63
64exit 0

 1#!/bin/bash
 2# SPDX-License-Identifier: GPL-2.0
 3# Copyright (C) 2019 Joe Lawrence <joe.lawrence@redhat.com>
 4
 5. $(dirname $0)/functions.sh
 6
 7MOD_LIVEPATCH=test_klp_livepatch
 8
 9setup_config
10
11
12# - turn ftrace_enabled OFF and verify livepatches can't load
13# - turn ftrace_enabled ON and verify livepatch can load
14# - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded
15
16start_test "livepatch interaction with ftrace_enabled sysctl"
17
18set_ftrace_enabled 0
19load_failing_mod $MOD_LIVEPATCH
20
21set_ftrace_enabled 1
22load_lp $MOD_LIVEPATCH
23if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
24	echo -e "FAIL\n\n"
25	die "livepatch kselftest(s) failed"
26fi
27
28set_ftrace_enabled 0
 
29if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
30	echo -e "FAIL\n\n"
31	die "livepatch kselftest(s) failed"
32fi
33disable_lp $MOD_LIVEPATCH
34unload_lp $MOD_LIVEPATCH
35
36check_result "livepatch: kernel.ftrace_enabled = 0
37% modprobe $MOD_LIVEPATCH
38livepatch: enabling patch '$MOD_LIVEPATCH'
39livepatch: '$MOD_LIVEPATCH': initializing patching transition
40livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16)
41livepatch: failed to patch object 'vmlinux'
42livepatch: failed to enable patch '$MOD_LIVEPATCH'
43livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch
44livepatch: '$MOD_LIVEPATCH': completing unpatching transition
45livepatch: '$MOD_LIVEPATCH': unpatching complete
46modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Device or resource busy
47livepatch: kernel.ftrace_enabled = 1
48% modprobe $MOD_LIVEPATCH
49livepatch: enabling patch '$MOD_LIVEPATCH'
50livepatch: '$MOD_LIVEPATCH': initializing patching transition
51livepatch: '$MOD_LIVEPATCH': starting patching transition
52livepatch: '$MOD_LIVEPATCH': completing patching transition
53livepatch: '$MOD_LIVEPATCH': patching complete
54livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy
55% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
56livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
57livepatch: '$MOD_LIVEPATCH': starting unpatching transition
58livepatch: '$MOD_LIVEPATCH': completing unpatching transition
59livepatch: '$MOD_LIVEPATCH': unpatching complete
60% rmmod $MOD_LIVEPATCH"
61
62
63exit 0