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 7MOD_LIVEPATCH=test_klp_livepatch 8 9setup_config 10 11 12# TEST: livepatch interaction with ftrace_enabled sysctl 13# - turn ftrace_enabled OFF and verify livepatches can't load 14# - turn ftrace_enabled ON and verify livepatch can load 15# - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded 16 17echo -n "TEST: livepatch interaction with ftrace_enabled sysctl ... " 18dmesg -C 19 20set_ftrace_enabled 0 21load_failing_mod $MOD_LIVEPATCH 22 23set_ftrace_enabled 1 24load_lp $MOD_LIVEPATCH 25if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then 26 echo -e "FAIL\n\n" 27 die "livepatch kselftest(s) failed" 28fi 29 30set_ftrace_enabled 0 31if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then 32 echo -e "FAIL\n\n" 33 die "livepatch kselftest(s) failed" 34fi 35disable_lp $MOD_LIVEPATCH 36unload_lp $MOD_LIVEPATCH 37 38check_result "livepatch: kernel.ftrace_enabled = 0 39% modprobe $MOD_LIVEPATCH 40livepatch: enabling patch '$MOD_LIVEPATCH' 41livepatch: '$MOD_LIVEPATCH': initializing patching transition 42livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16) 43livepatch: failed to patch object 'vmlinux' 44livepatch: failed to enable patch '$MOD_LIVEPATCH' 45livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch 46livepatch: '$MOD_LIVEPATCH': completing unpatching transition 47livepatch: '$MOD_LIVEPATCH': unpatching complete 48modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Device or resource busy 49livepatch: kernel.ftrace_enabled = 1 50% modprobe $MOD_LIVEPATCH 51livepatch: enabling patch '$MOD_LIVEPATCH' 52livepatch: '$MOD_LIVEPATCH': initializing patching transition 53livepatch: '$MOD_LIVEPATCH': starting patching transition 54livepatch: '$MOD_LIVEPATCH': completing patching transition 55livepatch: '$MOD_LIVEPATCH': patching complete 56livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy kernel.ftrace_enabled = 0 57% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled 58livepatch: '$MOD_LIVEPATCH': initializing unpatching transition 59livepatch: '$MOD_LIVEPATCH': starting unpatching transition 60livepatch: '$MOD_LIVEPATCH': completing unpatching transition 61livepatch: '$MOD_LIVEPATCH': unpatching complete 62% rmmod $MOD_LIVEPATCH" 63 64 65exit 0 66