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| author | Marcos Paulo de Souza <mpdesouza@suse.com> | 2026-02-20 11:12:33 -0300 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2026-03-06 14:54:28 +0100 |
| commit | 920e5001f4beb38685d5b8cac061cb1d2760eeab (patch) | |
| tree | 51aeeb13174fa04eda25ad1d208af31cd968b2ea /tools/testing/selftests/livepatch | |
| parent | 51ab33fc0a8bef9454849371ef897a1241911b37 (diff) | |
| download | lwn-920e5001f4beb38685d5b8cac061cb1d2760eeab.tar.gz lwn-920e5001f4beb38685d5b8cac061cb1d2760eeab.zip | |
selftests: livepatch: test-ftrace: livepatch a traced function
This is basically the inverse case of commit 474eecc882ae
("selftests: livepatch: test if ftrace can trace a livepatched function")
but ensuring that livepatch would work on a traced function.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260220-lp-test-trace-v1-1-4b6703cd01a6@suse.com
[pmladek: Fixed a typo found by Joe.]
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'tools/testing/selftests/livepatch')
| -rwxr-xr-x | tools/testing/selftests/livepatch/test-ftrace.sh | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tools/testing/selftests/livepatch/test-ftrace.sh b/tools/testing/selftests/livepatch/test-ftrace.sh index 094176f1a46a..d2c3dea63104 100755 --- a/tools/testing/selftests/livepatch/test-ftrace.sh +++ b/tools/testing/selftests/livepatch/test-ftrace.sh @@ -95,4 +95,40 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition livepatch: '$MOD_LIVEPATCH': unpatching complete % rmmod $MOD_LIVEPATCH" + +# - trace a function +# - verify livepatch can load targgeting on the same traced function +# - check if the livepatch is in effect +# - reset trace and unload livepatch + +start_test "livepatch a traced function and check that the live patch remains in effect" + +FUNCTION_NAME="cmdline_proc_show" + +trace_function "$FUNCTION_NAME" +load_lp $MOD_LIVEPATCH + +if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH: this has been live patched" ]] ; then + log "livepatch: ok" +fi + +check_traced_functions "$FUNCTION_NAME" + +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH + +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko +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: ok +% echo 0 > $SYSFS_KLP_DIR/$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 |