tools/testing/selftests/livepatch/test-livepatch.sh

   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 > $SYSFS_KLP_DIR/$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 > $SYSFS_KLP_DIR/$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 > $SYSFS_KLP_DIR/$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=($SYSFS_KLP_DIR/*)
 132 nmods=${#mods[@]}
 133 if [ "$nmods" -ne 3 ]; then
 134         die "Expecting three modules listed, found $nmods"
 135 fi
 136
 137 load_lp $MOD_REPLACE replace=1
 138
 139 grep 'live patched' /proc/cmdline > /dev/kmsg
 140 grep 'live patched' /proc/meminfo > /dev/kmsg
 141
 142 loop_until 'mods=($SYSFS_KLP_DIR/*); nmods=${#mods[@]}; [[ "$nmods" -eq 1 ]]' ||
 143         die "Expecting only one moduled listed, found $nmods"
 144
 145 # These modules were disabled by the atomic replace
 146 for mod in $MOD_LIVEPATCH3 $MOD_LIVEPATCH2 $MOD_LIVEPATCH1; do
 147         unload_lp "$mod"
 148 done
 149
 150 grep 'live patched' /proc/cmdline > /dev/kmsg
 151 grep 'live patched' /proc/meminfo > /dev/kmsg
 152
 153 disable_lp $MOD_REPLACE
 154 unload_lp $MOD_REPLACE
 155
 156 grep 'live patched' /proc/cmdline > /dev/kmsg
 157 grep 'live patched' /proc/meminfo > /dev/kmsg
 158
 159 check_result "% insmod test_modules/$MOD_LIVEPATCH1.ko
 160 livepatch: enabling patch '$MOD_LIVEPATCH1'
 161 livepatch: '$MOD_LIVEPATCH1': initializing patching transition
 162 livepatch: '$MOD_LIVEPATCH1': starting patching transition
 163 livepatch: '$MOD_LIVEPATCH1': completing patching transition
 164 livepatch: '$MOD_LIVEPATCH1': patching complete
 165 $MOD_LIVEPATCH1: this has been live patched
 166 % insmod test_modules/$MOD_LIVEPATCH2.ko
 167 livepatch: enabling patch '$MOD_LIVEPATCH2'
 168 livepatch: '$MOD_LIVEPATCH2': initializing patching transition
 169 livepatch: '$MOD_LIVEPATCH2': starting patching transition
 170 livepatch: '$MOD_LIVEPATCH2': completing patching transition
 171 livepatch: '$MOD_LIVEPATCH2': patching complete
 172 % insmod test_modules/$MOD_LIVEPATCH3.ko
 173 livepatch: enabling patch '$MOD_LIVEPATCH3'
 174 livepatch: '$MOD_LIVEPATCH3': initializing patching transition
 175 $MOD_LIVEPATCH3: pre_patch_callback: vmlinux
 176 livepatch: '$MOD_LIVEPATCH3': starting patching transition
 177 livepatch: '$MOD_LIVEPATCH3': completing patching transition
 178 $MOD_LIVEPATCH3: post_patch_callback: vmlinux
 179 livepatch: '$MOD_LIVEPATCH3': patching complete
 180 % insmod test_modules/$MOD_REPLACE.ko replace=1
 181 livepatch: enabling patch '$MOD_REPLACE'
 182 livepatch: '$MOD_REPLACE': initializing patching transition
 183 livepatch: '$MOD_REPLACE': starting patching transition
 184 livepatch: '$MOD_REPLACE': completing patching transition
 185 livepatch: '$MOD_REPLACE': patching complete
 186 $MOD_REPLACE: this has been live patched
 187 % rmmod $MOD_LIVEPATCH3
 188 % rmmod $MOD_LIVEPATCH2
 189 % rmmod $MOD_LIVEPATCH1
 190 $MOD_REPLACE: this has been live patched
 191 % echo 0 > $SYSFS_KLP_DIR/$MOD_REPLACE/enabled
 192 livepatch: '$MOD_REPLACE': initializing unpatching transition
 193 livepatch: '$MOD_REPLACE': starting unpatching transition
 194 livepatch: '$MOD_REPLACE': completing unpatching transition
 195 livepatch: '$MOD_REPLACE': unpatching complete
 196 % rmmod $MOD_REPLACE"
 197
 198
 199 exit 0