diff options
Diffstat (limited to 'tools/testing/selftests/livepatch/test-ftrace.sh')
| -rwxr-xr-x | tools/testing/selftests/livepatch/test-ftrace.sh | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/tools/testing/selftests/livepatch/test-ftrace.sh b/tools/testing/selftests/livepatch/test-ftrace.sh new file mode 100755 index 0000000000..825540a519 --- /dev/null +++ b/tools/testing/selftests/livepatch/test-ftrace.sh @@ -0,0 +1,64 @@ +#!/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 |