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 # TEST: basic function patching
  14 # - load a livepatch that modifies the output from /proc/cmdline and
  15 #   verify correct behavior
  16 # - unload the livepatch and make sure the patch was removed
  17
  18 echo -n "TEST: basic function patching ... "
  19 dmesg -C
  20
  21 load_lp $MOD_LIVEPATCH
  22
  23 if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: 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_LIVEPATCH
  29 unload_lp $MOD_LIVEPATCH
  30
  31 if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH: this has been live patched" ]] ; then
  32         echo -e "FAIL\n\n"
  33         die "livepatch kselftest(s) failed"
  34 fi
  35
  36 check_result "% modprobe $MOD_LIVEPATCH
  37 livepatch: enabling patch '$MOD_LIVEPATCH'
  38 livepatch: '$MOD_LIVEPATCH': initializing patching transition
  39 livepatch: '$MOD_LIVEPATCH': starting patching transition
  40 livepatch: '$MOD_LIVEPATCH': completing patching transition
  41 livepatch: '$MOD_LIVEPATCH': patching complete
  42 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
  43 livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
  44 livepatch: '$MOD_LIVEPATCH': starting unpatching transition
  45 livepatch: '$MOD_LIVEPATCH': completing unpatching transition
  46 livepatch: '$MOD_LIVEPATCH': unpatching complete
  47 % rmmod $MOD_LIVEPATCH"
  48
  49
  50 # TEST: multiple livepatches
  51 # - load a livepatch that modifies the output from /proc/cmdline and
  52 #   verify correct behavior
  53 # - load another livepatch and verify that both livepatches are active
  54 # - unload the second livepatch and verify that the first is still active
  55 # - unload the first livepatch and verify none are active
  56
  57 echo -n "TEST: multiple livepatches ... "
  58 dmesg -C
  59
  60 load_lp $MOD_LIVEPATCH
  61
  62 grep 'live patched' /proc/cmdline > /dev/kmsg
  63 grep 'live patched' /proc/meminfo > /dev/kmsg
  64
  65 load_lp $MOD_REPLACE replace=0
  66
  67 grep 'live patched' /proc/cmdline > /dev/kmsg
  68 grep 'live patched' /proc/meminfo > /dev/kmsg
  69
  70 disable_lp $MOD_REPLACE
  71 unload_lp $MOD_REPLACE
  72
  73 grep 'live patched' /proc/cmdline > /dev/kmsg
  74 grep 'live patched' /proc/meminfo > /dev/kmsg
  75
  76 disable_lp $MOD_LIVEPATCH
  77 unload_lp $MOD_LIVEPATCH
  78
  79 grep 'live patched' /proc/cmdline > /dev/kmsg
  80 grep 'live patched' /proc/meminfo > /dev/kmsg
  81
  82 check_result "% modprobe $MOD_LIVEPATCH
  83 livepatch: enabling patch '$MOD_LIVEPATCH'
  84 livepatch: '$MOD_LIVEPATCH': initializing patching transition
  85 livepatch: '$MOD_LIVEPATCH': starting patching transition
  86 livepatch: '$MOD_LIVEPATCH': completing patching transition
  87 livepatch: '$MOD_LIVEPATCH': patching complete
  88 $MOD_LIVEPATCH: this has been live patched
  89 % modprobe $MOD_REPLACE replace=0
  90 livepatch: enabling patch '$MOD_REPLACE'
  91 livepatch: '$MOD_REPLACE': initializing patching transition
  92 livepatch: '$MOD_REPLACE': starting patching transition
  93 livepatch: '$MOD_REPLACE': completing patching transition
  94 livepatch: '$MOD_REPLACE': patching complete
  95 $MOD_LIVEPATCH: this has been live patched
  96 $MOD_REPLACE: this has been live patched
  97 % echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
  98 livepatch: '$MOD_REPLACE': initializing unpatching transition
  99 livepatch: '$MOD_REPLACE': starting unpatching transition
 100 livepatch: '$MOD_REPLACE': completing unpatching transition
 101 livepatch: '$MOD_REPLACE': unpatching complete
 102 % rmmod $MOD_REPLACE
 103 $MOD_LIVEPATCH: this has been live patched
 104 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
 105 livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
 106 livepatch: '$MOD_LIVEPATCH': starting unpatching transition
 107 livepatch: '$MOD_LIVEPATCH': completing unpatching transition
 108 livepatch: '$MOD_LIVEPATCH': unpatching complete
 109 % rmmod $MOD_LIVEPATCH"
 110
 111
 112 # TEST: atomic replace livepatch
 113 # - load a livepatch that modifies the output from /proc/cmdline and
 114 #   verify correct behavior
 115 # - load an atomic replace livepatch and verify that only the second is active
 116 # - remove the first livepatch and verify that the atomic replace livepatch
 117 #   is still active
 118 # - remove the atomic replace livepatch and verify that none are active
 119
 120 echo -n "TEST: atomic replace livepatch ... "
 121 dmesg -C
 122
 123 load_lp $MOD_LIVEPATCH
 124
 125 grep 'live patched' /proc/cmdline > /dev/kmsg
 126 grep 'live patched' /proc/meminfo > /dev/kmsg
 127
 128 load_lp $MOD_REPLACE replace=1
 129
 130 grep 'live patched' /proc/cmdline > /dev/kmsg
 131 grep 'live patched' /proc/meminfo > /dev/kmsg
 132
 133 unload_lp $MOD_LIVEPATCH
 134
 135 grep 'live patched' /proc/cmdline > /dev/kmsg
 136 grep 'live patched' /proc/meminfo > /dev/kmsg
 137
 138 disable_lp $MOD_REPLACE
 139 unload_lp $MOD_REPLACE
 140
 141 grep 'live patched' /proc/cmdline > /dev/kmsg
 142 grep 'live patched' /proc/meminfo > /dev/kmsg
 143
 144 check_result "% modprobe $MOD_LIVEPATCH
 145 livepatch: enabling patch '$MOD_LIVEPATCH'
 146 livepatch: '$MOD_LIVEPATCH': initializing patching transition
 147 livepatch: '$MOD_LIVEPATCH': starting patching transition
 148 livepatch: '$MOD_LIVEPATCH': completing patching transition
 149 livepatch: '$MOD_LIVEPATCH': patching complete
 150 $MOD_LIVEPATCH: this has been live patched
 151 % modprobe $MOD_REPLACE replace=1
 152 livepatch: enabling patch '$MOD_REPLACE'
 153 livepatch: '$MOD_REPLACE': initializing patching transition
 154 livepatch: '$MOD_REPLACE': starting patching transition
 155 livepatch: '$MOD_REPLACE': completing patching transition
 156 livepatch: '$MOD_REPLACE': patching complete
 157 $MOD_REPLACE: this has been live patched
 158 % rmmod $MOD_LIVEPATCH
 159 $MOD_REPLACE: this has been live patched
 160 % echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
 161 livepatch: '$MOD_REPLACE': initializing unpatching transition
 162 livepatch: '$MOD_REPLACE': starting unpatching transition
 163 livepatch: '$MOD_REPLACE': completing unpatching transition
 164 livepatch: '$MOD_REPLACE': unpatching complete
 165 % rmmod $MOD_REPLACE"
 166
 167
 168 exit 0