| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (C) 2019 Joe Lawrence <joe.lawrence@redhat.com> |
| |
| . $(dirname $0)/functions.sh |
| |
| MOD_LIVEPATCH=test_klp_livepatch |
| |
| setup_config |
| |
| |
| # - turn ftrace_enabled OFF and verify livepatches can't load |
| # - turn ftrace_enabled ON and verify livepatch can load |
| # - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded |
| |
| start_test "livepatch interaction with ftrace_enabled sysctl" |
| |
| set_ftrace_enabled 0 |
| load_failing_mod $MOD_LIVEPATCH |
| |
| set_ftrace_enabled 1 |
| load_lp $MOD_LIVEPATCH |
| if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then |
| echo -e "FAIL\n\n" |
| die "livepatch kselftest(s) failed" |
| fi |
| |
| # Check that ftrace could not get disabled when a livepatch is enabled |
| set_ftrace_enabled --fail 0 |
| if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then |
| echo -e "FAIL\n\n" |
| die "livepatch kselftest(s) failed" |
| fi |
| disable_lp $MOD_LIVEPATCH |
| unload_lp $MOD_LIVEPATCH |
| |
| check_result "livepatch: kernel.ftrace_enabled = 0 |
| % modprobe $MOD_LIVEPATCH |
| livepatch: enabling patch '$MOD_LIVEPATCH' |
| livepatch: '$MOD_LIVEPATCH': initializing patching transition |
| livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16) |
| livepatch: failed to patch object 'vmlinux' |
| livepatch: failed to enable patch '$MOD_LIVEPATCH' |
| livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch |
| livepatch: '$MOD_LIVEPATCH': completing unpatching transition |
| livepatch: '$MOD_LIVEPATCH': unpatching complete |
| modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Device or resource busy |
| livepatch: kernel.ftrace_enabled = 1 |
| % modprobe $MOD_LIVEPATCH |
| livepatch: enabling patch '$MOD_LIVEPATCH' |
| livepatch: '$MOD_LIVEPATCH': initializing patching transition |
| livepatch: '$MOD_LIVEPATCH': starting patching transition |
| livepatch: '$MOD_LIVEPATCH': completing patching transition |
| livepatch: '$MOD_LIVEPATCH': patching complete |
| livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy |
| % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled |
| livepatch: '$MOD_LIVEPATCH': initializing unpatching transition |
| livepatch: '$MOD_LIVEPATCH': starting unpatching transition |
| livepatch: '$MOD_LIVEPATCH': completing unpatching transition |
| livepatch: '$MOD_LIVEPATCH': unpatching complete |
| % rmmod $MOD_LIVEPATCH" |
| |
| |
| exit 0 |
