| #!/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 |