162597edfSMichael Vetter#!/bin/bash 262597edfSMichael Vetter# SPDX-License-Identifier: GPL-2.0 362597edfSMichael Vetter# Copyright (C) 2024 SUSE 462597edfSMichael Vetter# Author: Michael Vetter <mvetter@suse.com> 562597edfSMichael Vetter 662597edfSMichael Vetter. $(dirname $0)/functions.sh 762597edfSMichael Vetter 8*59481b8bSSong Liugrep -q kprobe_ftrace_ops /proc/kallsyms || skip "test-kprobe requires CONFIG_KPROBES_ON_FTRACE" 9*59481b8bSSong Liu 1062597edfSMichael VetterMOD_LIVEPATCH=test_klp_livepatch 1162597edfSMichael VetterMOD_KPROBE=test_klp_kprobe 1262597edfSMichael Vetter 1362597edfSMichael Vettersetup_config 1462597edfSMichael Vetter 1562597edfSMichael Vetter# Kprobe a function and verify that we can't livepatch that same function 1662597edfSMichael Vetter# when it uses a post_handler since only one IPMODIFY maybe be registered 1762597edfSMichael Vetter# to any given function at a time. 1862597edfSMichael Vetter 1962597edfSMichael Vetterstart_test "livepatch interaction with kprobed function with post_handler" 2062597edfSMichael Vetter 2162597edfSMichael Vetterecho 1 > "$SYSFS_KPROBES_DIR/enabled" 2262597edfSMichael Vetter 2362597edfSMichael Vetterload_mod $MOD_KPROBE has_post_handler=true 2462597edfSMichael Vetterload_failing_mod $MOD_LIVEPATCH 2562597edfSMichael Vetterunload_mod $MOD_KPROBE 2662597edfSMichael Vetter 2762597edfSMichael Vettercheck_result "% insmod test_modules/test_klp_kprobe.ko has_post_handler=true 2862597edfSMichael Vetter% insmod test_modules/$MOD_LIVEPATCH.ko 2962597edfSMichael Vetterlivepatch: enabling patch '$MOD_LIVEPATCH' 3062597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': initializing patching transition 3162597edfSMichael Vetterlivepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16) 3262597edfSMichael Vetterlivepatch: failed to patch object 'vmlinux' 3362597edfSMichael Vetterlivepatch: failed to enable patch '$MOD_LIVEPATCH' 3462597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch 3562597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': completing unpatching transition 3662597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': unpatching complete 3762597edfSMichael Vetterinsmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Device or resource busy 3862597edfSMichael Vetter% rmmod test_klp_kprobe" 3962597edfSMichael Vetter 4062597edfSMichael Vetterstart_test "livepatch interaction with kprobed function without post_handler" 4162597edfSMichael Vetter 4262597edfSMichael Vetterload_mod $MOD_KPROBE has_post_handler=false 4362597edfSMichael Vetterload_lp $MOD_LIVEPATCH 4462597edfSMichael Vetter 4562597edfSMichael Vetterunload_mod $MOD_KPROBE 4662597edfSMichael Vetterdisable_lp $MOD_LIVEPATCH 4762597edfSMichael Vetterunload_lp $MOD_LIVEPATCH 4862597edfSMichael Vetter 4962597edfSMichael Vettercheck_result "% insmod test_modules/test_klp_kprobe.ko has_post_handler=false 5062597edfSMichael Vetter% insmod test_modules/$MOD_LIVEPATCH.ko 5162597edfSMichael Vetterlivepatch: enabling patch '$MOD_LIVEPATCH' 5262597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': initializing patching transition 5362597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': starting patching transition 5462597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': completing patching transition 5562597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': patching complete 5662597edfSMichael Vetter% rmmod test_klp_kprobe 5762597edfSMichael Vetter% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled 5862597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': initializing unpatching transition 5962597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': starting unpatching transition 6062597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': completing unpatching transition 6162597edfSMichael Vetterlivepatch: '$MOD_LIVEPATCH': unpatching complete 6262597edfSMichael Vetter% rmmod $MOD_LIVEPATCH" 6362597edfSMichael Vetter 6462597edfSMichael Vetterexit 0 65