1*4882a593Smuzhiyun#!/bin/bash 2*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 3*4882a593Smuzhiyun# Copyright (C) 2019 Joe Lawrence <joe.lawrence@redhat.com> 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun. $(dirname $0)/functions.sh 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunMOD_LIVEPATCH=test_klp_livepatch 8*4882a593Smuzhiyun 9*4882a593Smuzhiyunsetup_config 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun# - turn ftrace_enabled OFF and verify livepatches can't load 13*4882a593Smuzhiyun# - turn ftrace_enabled ON and verify livepatch can load 14*4882a593Smuzhiyun# - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded 15*4882a593Smuzhiyun 16*4882a593Smuzhiyunstart_test "livepatch interaction with ftrace_enabled sysctl" 17*4882a593Smuzhiyun 18*4882a593Smuzhiyunset_ftrace_enabled 0 19*4882a593Smuzhiyunload_failing_mod $MOD_LIVEPATCH 20*4882a593Smuzhiyun 21*4882a593Smuzhiyunset_ftrace_enabled 1 22*4882a593Smuzhiyunload_lp $MOD_LIVEPATCH 23*4882a593Smuzhiyunif [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then 24*4882a593Smuzhiyun echo -e "FAIL\n\n" 25*4882a593Smuzhiyun die "livepatch kselftest(s) failed" 26*4882a593Smuzhiyunfi 27*4882a593Smuzhiyun 28*4882a593Smuzhiyunset_ftrace_enabled 0 29*4882a593Smuzhiyunif [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then 30*4882a593Smuzhiyun echo -e "FAIL\n\n" 31*4882a593Smuzhiyun die "livepatch kselftest(s) failed" 32*4882a593Smuzhiyunfi 33*4882a593Smuzhiyundisable_lp $MOD_LIVEPATCH 34*4882a593Smuzhiyununload_lp $MOD_LIVEPATCH 35*4882a593Smuzhiyun 36*4882a593Smuzhiyuncheck_result "livepatch: kernel.ftrace_enabled = 0 37*4882a593Smuzhiyun% modprobe $MOD_LIVEPATCH 38*4882a593Smuzhiyunlivepatch: enabling patch '$MOD_LIVEPATCH' 39*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': initializing patching transition 40*4882a593Smuzhiyunlivepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16) 41*4882a593Smuzhiyunlivepatch: failed to patch object 'vmlinux' 42*4882a593Smuzhiyunlivepatch: failed to enable patch '$MOD_LIVEPATCH' 43*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch 44*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': completing unpatching transition 45*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': unpatching complete 46*4882a593Smuzhiyunmodprobe: ERROR: could not insert '$MOD_LIVEPATCH': Device or resource busy 47*4882a593Smuzhiyunlivepatch: kernel.ftrace_enabled = 1 48*4882a593Smuzhiyun% modprobe $MOD_LIVEPATCH 49*4882a593Smuzhiyunlivepatch: enabling patch '$MOD_LIVEPATCH' 50*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': initializing patching transition 51*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': starting patching transition 52*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': completing patching transition 53*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': patching complete 54*4882a593Smuzhiyunlivepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy 55*4882a593Smuzhiyun% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled 56*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': initializing unpatching transition 57*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': starting unpatching transition 58*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': completing unpatching transition 59*4882a593Smuzhiyunlivepatch: '$MOD_LIVEPATCH': unpatching complete 60*4882a593Smuzhiyun% rmmod $MOD_LIVEPATCH" 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun 63*4882a593Smuzhiyunexit 0 64