65 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03# Copyright (C) 2019 Joe Lawrence <joe.lawrence@redhat.com>4 5. $(dirname $0)/functions.sh6 7MOD_LIVEPATCH=test_klp_livepatch8 9setup_config10 11 12# - turn ftrace_enabled OFF and verify livepatches can't load13# - turn ftrace_enabled ON and verify livepatch can load14# - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded15 16start_test "livepatch interaction with ftrace_enabled sysctl"17 18set_ftrace_enabled 019load_failing_mod $MOD_LIVEPATCH20 21set_ftrace_enabled 122load_lp $MOD_LIVEPATCH23if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then24 echo -e "FAIL\n\n"25 die "livepatch kselftest(s) failed"26fi27 28# Check that ftrace could not get disabled when a livepatch is enabled29set_ftrace_enabled --fail 030if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then31 echo -e "FAIL\n\n"32 die "livepatch kselftest(s) failed"33fi34disable_lp $MOD_LIVEPATCH35unload_lp $MOD_LIVEPATCH36 37check_result "livepatch: kernel.ftrace_enabled = 038% insmod test_modules/$MOD_LIVEPATCH.ko39livepatch: enabling patch '$MOD_LIVEPATCH'40livepatch: '$MOD_LIVEPATCH': initializing patching transition41livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16)42livepatch: failed to patch object 'vmlinux'43livepatch: failed to enable patch '$MOD_LIVEPATCH'44livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch45livepatch: '$MOD_LIVEPATCH': completing unpatching transition46livepatch: '$MOD_LIVEPATCH': unpatching complete47insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Device or resource busy48livepatch: kernel.ftrace_enabled = 149% insmod test_modules/$MOD_LIVEPATCH.ko50livepatch: enabling patch '$MOD_LIVEPATCH'51livepatch: '$MOD_LIVEPATCH': initializing patching transition52livepatch: '$MOD_LIVEPATCH': starting patching transition53livepatch: '$MOD_LIVEPATCH': completing patching transition54livepatch: '$MOD_LIVEPATCH': patching complete55livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy56% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled57livepatch: '$MOD_LIVEPATCH': initializing unpatching transition58livepatch: '$MOD_LIVEPATCH': starting unpatching transition59livepatch: '$MOD_LIVEPATCH': completing unpatching transition60livepatch: '$MOD_LIVEPATCH': unpatching complete61% rmmod $MOD_LIVEPATCH"62 63 64exit 065