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 7 MOD_LIVEPATCH=test_klp_livepatch 8 9 setup_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 16 start_test "livepatch interaction with ftrace_enabled sysctl" 17 18 set_ftrace_enabled 0 19 load_failing_mod $MOD_LIVEPATCH 20 21 set_ftrace_enabled 1 22 load_lp $MOD_LIVEPATCH 23 if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then 24 echo -e "FAIL\n\n" 25 die "livepatch kselftest(s) failed" 26 fi 27 28 # Check that ftrace could not get disabled when a livepatch is enabled 29 set_ftrace_enabled --fail 0 30 if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then 31 echo -e "FAIL\n\n" 32 die "livepatch kselftest(s) failed" 33 fi 34 disable_lp $MOD_LIVEPATCH 35 unload_lp $MOD_LIVEPATCH 36 37 check_result "livepatch: kernel.ftrace_enabled = 0 38 % insmod test_modules/$MOD_LIVEPATCH.ko 39 livepatch: enabling patch '$MOD_LIVEPATCH' 40 livepatch: '$MOD_LIVEPATCH': initializing patching transition 41 livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16) 42 livepatch: failed to patch object 'vmlinux' 43 livepatch: failed to enable patch '$MOD_LIVEPATCH' 44 livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch 45 livepatch: '$MOD_LIVEPATCH': completing unpatching transition 46 livepatch: '$MOD_LIVEPATCH': unpatching complete 47 insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Device or resource busy 48 livepatch: kernel.ftrace_enabled = 1 49 % insmod test_modules/$MOD_LIVEPATCH.ko 50 livepatch: enabling patch '$MOD_LIVEPATCH' 51 livepatch: '$MOD_LIVEPATCH': initializing patching transition 52 livepatch: '$MOD_LIVEPATCH': starting patching transition 53 livepatch: '$MOD_LIVEPATCH': completing patching transition 54 livepatch: '$MOD_LIVEPATCH': patching complete 55 livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy 56 % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled 57 livepatch: '$MOD_LIVEPATCH': initializing unpatching transition 58 livepatch: '$MOD_LIVEPATCH': starting unpatching transition 59 livepatch: '$MOD_LIVEPATCH': completing unpatching transition 60 livepatch: '$MOD_LIVEPATCH': unpatching complete 61 % rmmod $MOD_LIVEPATCH" 62 63 64 exit 0
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