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_LIVEPATCH=test_klp_livepatch
   8 MOD_REPLACE=test_klp_atomic_replace
   9
  10 setup_config
  11
  12
  13 # - load a livepatch that modifies the output from /proc/cmdline and
  14 #   verify correct behavior
  15 # - unload the livepatch and make sure the patch was removed
  16
  17 start_test "basic function patching"
  18
  19 load_lp $MOD_LIVEPATCH
  20
  21 if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
  22         echo -e "FAIL\n\n"
  23         die "livepatch kselftest(s) failed"
  24 fi
  25
  26 disable_lp $MOD_LIVEPATCH
  27 unload_lp $MOD_LIVEPATCH
  28
  29 if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH: this has been live patched" ]] ; then
  30         echo -e "FAIL\n\n"
  31         die "livepatch kselftest(s) failed"
  32 fi
  33
  34 check_result "% modprobe $MOD_LIVEPATCH
  35 livepatch: enabling patch '$MOD_LIVEPATCH'
  36 livepatch: '$MOD_LIVEPATCH': initializing patching transition
  37 livepatch: '$MOD_LIVEPATCH': starting patching transition
  38 livepatch: '$MOD_LIVEPATCH': completing patching transition
  39 livepatch: '$MOD_LIVEPATCH': patching complete
  40 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
  41 livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
  42 livepatch: '$MOD_LIVEPATCH': starting unpatching transition
  43 livepatch: '$MOD_LIVEPATCH': completing unpatching transition
  44 livepatch: '$MOD_LIVEPATCH': unpatching complete
  45 % rmmod $MOD_LIVEPATCH"
  46
  47
  48 # - load a livepatch that modifies the output from /proc/cmdline and
  49 #   verify correct behavior
  50 # - load another livepatch and verify that both livepatches are active
  51 # - unload the second livepatch and verify that the first is still active
  52 # - unload the first livepatch and verify none are active
  53
  54 start_test "multiple livepatches"
  55
  56 load_lp $MOD_LIVEPATCH
  57
  58 grep 'live patched' /proc/cmdline > /dev/kmsg
  59 grep 'live patched' /proc/meminfo > /dev/kmsg
  60
  61 load_lp $MOD_REPLACE replace=0
  62
  63 grep 'live patched' /proc/cmdline > /dev/kmsg
  64 grep 'live patched' /proc/meminfo > /dev/kmsg
  65
  66 disable_lp $MOD_REPLACE
  67 unload_lp $MOD_REPLACE
  68
  69 grep 'live patched' /proc/cmdline > /dev/kmsg
  70 grep 'live patched' /proc/meminfo > /dev/kmsg
  71
  72 disable_lp $MOD_LIVEPATCH
  73 unload_lp $MOD_LIVEPATCH
  74
  75 grep 'live patched' /proc/cmdline > /dev/kmsg
  76 grep 'live patched' /proc/meminfo > /dev/kmsg
  77
  78 check_result "% modprobe $MOD_LIVEPATCH
  79 livepatch: enabling patch '$MOD_LIVEPATCH'
  80 livepatch: '$MOD_LIVEPATCH': initializing patching transition
  81 livepatch: '$MOD_LIVEPATCH': starting patching transition
  82 livepatch: '$MOD_LIVEPATCH': completing patching transition
  83 livepatch: '$MOD_LIVEPATCH': patching complete
  84 $MOD_LIVEPATCH: this has been live patched
  85 % modprobe $MOD_REPLACE replace=0
  86 livepatch: enabling patch '$MOD_REPLACE'
  87 livepatch: '$MOD_REPLACE': initializing patching transition
  88 livepatch: '$MOD_REPLACE': starting patching transition
  89 livepatch: '$MOD_REPLACE': completing patching transition
  90 livepatch: '$MOD_REPLACE': patching complete
  91 $MOD_LIVEPATCH: this has been live patched
  92 $MOD_REPLACE: this has been live patched
  93 % echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
  94 livepatch: '$MOD_REPLACE': initializing unpatching transition
  95 livepatch: '$MOD_REPLACE': starting unpatching transition
  96 livepatch: '$MOD_REPLACE': completing unpatching transition
  97 livepatch: '$MOD_REPLACE': unpatching complete
  98 % rmmod $MOD_REPLACE
  99 $MOD_LIVEPATCH: this has been live patched
 100 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
 101 livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
 102 livepatch: '$MOD_LIVEPATCH': starting unpatching transition
 103 livepatch: '$MOD_LIVEPATCH': completing unpatching transition
 104 livepatch: '$MOD_LIVEPATCH': unpatching complete
 105 % rmmod $MOD_LIVEPATCH"
 106
 107
 108 # - load a livepatch that modifies the output from /proc/cmdline and
 109 #   verify correct behavior
 110 # - load an atomic replace livepatch and verify that only the second is active
 111 # - remove the first livepatch and verify that the atomic replace livepatch
 112 #   is still active
 113 # - remove the atomic replace livepatch and verify that none are active
 114
 115 start_test "atomic replace livepatch"
 116
 117 load_lp $MOD_LIVEPATCH
 118
 119 grep 'live patched' /proc/cmdline > /dev/kmsg
 120 grep 'live patched' /proc/meminfo > /dev/kmsg
 121
 122 load_lp $MOD_REPLACE replace=1
 123
 124 grep 'live patched' /proc/cmdline > /dev/kmsg
 125 grep 'live patched' /proc/meminfo > /dev/kmsg
 126
 127 unload_lp $MOD_LIVEPATCH
 128
 129 grep 'live patched' /proc/cmdline > /dev/kmsg
 130 grep 'live patched' /proc/meminfo > /dev/kmsg
 131
 132 disable_lp $MOD_REPLACE
 133 unload_lp $MOD_REPLACE
 134
 135 grep 'live patched' /proc/cmdline > /dev/kmsg
 136 grep 'live patched' /proc/meminfo > /dev/kmsg
 137
 138 check_result "% modprobe $MOD_LIVEPATCH
 139 livepatch: enabling patch '$MOD_LIVEPATCH'
 140 livepatch: '$MOD_LIVEPATCH': initializing patching transition
 141 livepatch: '$MOD_LIVEPATCH': starting patching transition
 142 livepatch: '$MOD_LIVEPATCH': completing patching transition
 143 livepatch: '$MOD_LIVEPATCH': patching complete
 144 $MOD_LIVEPATCH: this has been live patched
 145 % modprobe $MOD_REPLACE replace=1
 146 livepatch: enabling patch '$MOD_REPLACE'
 147 livepatch: '$MOD_REPLACE': initializing patching transition
 148 livepatch: '$MOD_REPLACE': starting patching transition
 149 livepatch: '$MOD_REPLACE': completing patching transition
 150 livepatch: '$MOD_REPLACE': patching complete
 151 $MOD_REPLACE: this has been live patched
 152 % rmmod $MOD_LIVEPATCH
 153 $MOD_REPLACE: this has been live patched
 154 % echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
 155 livepatch: '$MOD_REPLACE': initializing unpatching transition
 156 livepatch: '$MOD_REPLACE': starting unpatching transition
 157 livepatch: '$MOD_REPLACE': completing unpatching transition
 158 livepatch: '$MOD_REPLACE': unpatching complete
 159 % rmmod $MOD_REPLACE"
 160
 161
 162 exit 0