1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com>
4
5 . $(dirname $0)/functions.sh
6
7 MOD_LIVEPATCH1=test_klp_livepatch
8 MOD_LIVEPATCH2=test_klp_syscall
9 MOD_LIVEPATCH3=test_klp_callbacks_demo
10 MOD_REPLACE=test_klp_atomic_replace
11
12 setup_config
13
14
15 # - load a livepatch that modifies the output from /proc/cmdline and
16 # verify correct behavior
17 # - unload the livepatch and make sure the patch was removed
18
19 start_test "basic function patching"
20
21 load_lp $MOD_LIVEPATCH1
22
23 if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH1: this has been live patched" ]] ; then
24 echo -e "FAIL\n\n"
25 die "livepatch kselftest(s) failed"
26 fi
27
28 disable_lp $MOD_LIVEPATCH1
29 unload_lp $MOD_LIVEPATCH1
30
31 if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH1: this has been live patched" ]] ; then
32 echo -e "FAIL\n\n"
33 die "livepatch kselftest(s) failed"
34 fi
35
36 check_result "% insmod test_modules/$MOD_LIVEPATCH1.ko
37 livepatch: enabling patch '$MOD_LIVEPATCH1'
38 livepatch: '$MOD_LIVEPATCH1': initializing patching transition
39 livepatch: '$MOD_LIVEPATCH1': starting patching transition
40 livepatch: '$MOD_LIVEPATCH1': completing patching transition
41 livepatch: '$MOD_LIVEPATCH1': patching complete
42 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH1/enabled
43 livepatch: '$MOD_LIVEPATCH1': initializing unpatching transition
44 livepatch: '$MOD_LIVEPATCH1': starting unpatching transition
45 livepatch: '$MOD_LIVEPATCH1': completing unpatching transition
46 livepatch: '$MOD_LIVEPATCH1': unpatching complete
47 % rmmod $MOD_LIVEPATCH1"
48
49
50 # - load a livepatch that modifies the output from /proc/cmdline and
51 # verify correct behavior
52 # - load another livepatch and verify that both livepatches are active
53 # - unload the second livepatch and verify that the first is still active
54 # - unload the first livepatch and verify none are active
55
56 start_test "multiple livepatches"
57
58 load_lp $MOD_LIVEPATCH1
59
60 grep 'live patched' /proc/cmdline > /dev/kmsg
61 grep 'live patched' /proc/meminfo > /dev/kmsg
62
63 load_lp $MOD_REPLACE replace=0
64
65 grep 'live patched' /proc/cmdline > /dev/kmsg
66 grep 'live patched' /proc/meminfo > /dev/kmsg
67
68 disable_lp $MOD_REPLACE
69 unload_lp $MOD_REPLACE
70
71 grep 'live patched' /proc/cmdline > /dev/kmsg
72 grep 'live patched' /proc/meminfo > /dev/kmsg
73
74 disable_lp $MOD_LIVEPATCH1
75 unload_lp $MOD_LIVEPATCH1
76
77 grep 'live patched' /proc/cmdline > /dev/kmsg
78 grep 'live patched' /proc/meminfo > /dev/kmsg
79
80 check_result "% insmod test_modules/$MOD_LIVEPATCH1.ko
81 livepatch: enabling patch '$MOD_LIVEPATCH1'
82 livepatch: '$MOD_LIVEPATCH1': initializing patching transition
83 livepatch: '$MOD_LIVEPATCH1': starting patching transition
84 livepatch: '$MOD_LIVEPATCH1': completing patching transition
85 livepatch: '$MOD_LIVEPATCH1': patching complete
86 $MOD_LIVEPATCH1: this has been live patched
87 % insmod test_modules/$MOD_REPLACE.ko replace=0
88 livepatch: enabling patch '$MOD_REPLACE'
89 livepatch: '$MOD_REPLACE': initializing patching transition
90 livepatch: '$MOD_REPLACE': starting patching transition
91 livepatch: '$MOD_REPLACE': completing patching transition
92 livepatch: '$MOD_REPLACE': patching complete
93 $MOD_LIVEPATCH1: this has been live patched
94 $MOD_REPLACE: this has been live patched
95 % echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
96 livepatch: '$MOD_REPLACE': initializing unpatching transition
97 livepatch: '$MOD_REPLACE': starting unpatching transition
98 livepatch: '$MOD_REPLACE': completing unpatching transition
99 livepatch: '$MOD_REPLACE': unpatching complete
100 % rmmod $MOD_REPLACE
101 $MOD_LIVEPATCH1: this has been live patched
102 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH1/enabled
103 livepatch: '$MOD_LIVEPATCH1': initializing unpatching transition
104 livepatch: '$MOD_LIVEPATCH1': starting unpatching transition
105 livepatch: '$MOD_LIVEPATCH1': completing unpatching transition
106 livepatch: '$MOD_LIVEPATCH1': unpatching complete
107 % rmmod $MOD_LIVEPATCH1"
108
109
110 # - load a livepatch that modifies the output from /proc/cmdline and
111 # verify correct behavior
112 # - load two additional livepatches and check the number of livepatch modules
113 # applied
114 # - load an atomic replace livepatch and check that the other three modules were
115 # disabled
116 # - remove all livepatches besides the atomic replace one and verify that the
117 # atomic replace livepatch is still active
118 # - remove the atomic replace livepatch and verify that none are active
119
120 start_test "atomic replace livepatch"
121
122 load_lp $MOD_LIVEPATCH1
123
124 grep 'live patched' /proc/cmdline > /dev/kmsg
125 grep 'live patched' /proc/meminfo > /dev/kmsg
126
127 for mod in $MOD_LIVEPATCH2 $MOD_LIVEPATCH3; do
128 load_lp "$mod"
129 done
130
131 mods=(/sys/kernel/livepatch/*)
132 nmods=${#mods[@]}
133 if [ "$nmods" -ne 3 ]; then
134 die "Expecting three modules listed, found $nmods"
135 fi
136
137 load_lp $MOD_REPLACE replace=1
138
139 grep 'live patched' /proc/cmdline > /dev/kmsg
140 grep 'live patched' /proc/meminfo > /dev/kmsg
141
142 mods=(/sys/kernel/livepatch/*)
143 nmods=${#mods[@]}
144 if [ "$nmods" -ne 1 ]; then
145 die "Expecting only one moduled listed, found $nmods"
146 fi
147
148 # These modules were disabled by the atomic replace
149 for mod in $MOD_LIVEPATCH3 $MOD_LIVEPATCH2 $MOD_LIVEPATCH1; do
150 unload_lp "$mod"
151 done
152
153 grep 'live patched' /proc/cmdline > /dev/kmsg
154 grep 'live patched' /proc/meminfo > /dev/kmsg
155
156 disable_lp $MOD_REPLACE
157 unload_lp $MOD_REPLACE
158
159 grep 'live patched' /proc/cmdline > /dev/kmsg
160 grep 'live patched' /proc/meminfo > /dev/kmsg
161
162 check_result "% insmod test_modules/$MOD_LIVEPATCH1.ko
163 livepatch: enabling patch '$MOD_LIVEPATCH1'
164 livepatch: '$MOD_LIVEPATCH1': initializing patching transition
165 livepatch: '$MOD_LIVEPATCH1': starting patching transition
166 livepatch: '$MOD_LIVEPATCH1': completing patching transition
167 livepatch: '$MOD_LIVEPATCH1': patching complete
168 $MOD_LIVEPATCH1: this has been live patched
169 % insmod test_modules/$MOD_LIVEPATCH2.ko
170 livepatch: enabling patch '$MOD_LIVEPATCH2'
171 livepatch: '$MOD_LIVEPATCH2': initializing patching transition
172 livepatch: '$MOD_LIVEPATCH2': starting patching transition
173 livepatch: '$MOD_LIVEPATCH2': completing patching transition
174 livepatch: '$MOD_LIVEPATCH2': patching complete
175 % insmod test_modules/$MOD_LIVEPATCH3.ko
176 livepatch: enabling patch '$MOD_LIVEPATCH3'
177 livepatch: '$MOD_LIVEPATCH3': initializing patching transition
178 $MOD_LIVEPATCH3: pre_patch_callback: vmlinux
179 livepatch: '$MOD_LIVEPATCH3': starting patching transition
180 livepatch: '$MOD_LIVEPATCH3': completing patching transition
181 $MOD_LIVEPATCH3: post_patch_callback: vmlinux
182 livepatch: '$MOD_LIVEPATCH3': patching complete
183 % insmod test_modules/$MOD_REPLACE.ko replace=1
184 livepatch: enabling patch '$MOD_REPLACE'
185 livepatch: '$MOD_REPLACE': initializing patching transition
186 livepatch: '$MOD_REPLACE': starting patching transition
187 livepatch: '$MOD_REPLACE': completing patching transition
188 livepatch: '$MOD_REPLACE': patching complete
189 $MOD_REPLACE: this has been live patched
190 % rmmod $MOD_LIVEPATCH3
191 % rmmod $MOD_LIVEPATCH2
192 % rmmod $MOD_LIVEPATCH1
193 $MOD_REPLACE: this has been live patched
194 % echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
195 livepatch: '$MOD_REPLACE': initializing unpatching transition
196 livepatch: '$MOD_REPLACE': starting unpatching transition
197 livepatch: '$MOD_REPLACE': completing unpatching transition
198 livepatch: '$MOD_REPLACE': unpatching complete
199 % rmmod $MOD_REPLACE"
200
201
202 exit 0
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