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Diffstat (limited to 'tools/testing/selftests/livepatch/test-callbacks.sh')
| -rwxr-xr-x | tools/testing/selftests/livepatch/test-callbacks.sh | 553 |
1 files changed, 553 insertions, 0 deletions
diff --git a/tools/testing/selftests/livepatch/test-callbacks.sh b/tools/testing/selftests/livepatch/test-callbacks.sh new file mode 100755 index 000000000..90b26dbb2 --- /dev/null +++ b/tools/testing/selftests/livepatch/test-callbacks.sh @@ -0,0 +1,553 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com> + +. $(dirname $0)/functions.sh + +MOD_LIVEPATCH=test_klp_callbacks_demo +MOD_LIVEPATCH2=test_klp_callbacks_demo2 +MOD_TARGET=test_klp_callbacks_mod +MOD_TARGET_BUSY=test_klp_callbacks_busy + +setup_config + + +# Test a combination of loading a kernel module and a livepatch that +# patches a function in the first module. Load the target module +# before the livepatch module. Unload them in the same order. +# +# - On livepatch enable, before the livepatch transition starts, +# pre-patch callbacks are executed for vmlinux and $MOD_TARGET (those +# klp_objects currently loaded). After klp_objects are patched +# according to the klp_patch, their post-patch callbacks run and the +# transition completes. +# +# - Similarly, on livepatch disable, pre-patch callbacks run before the +# unpatching transition starts. klp_objects are reverted, post-patch +# callbacks execute and the transition completes. + +start_test "target module before livepatch" + +load_mod $MOD_TARGET +load_lp $MOD_LIVEPATCH +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH +unload_mod $MOD_TARGET + +check_result "% modprobe $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_init +% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': patching complete +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit" + + +# This test is similar to the previous test, but (un)load the livepatch +# module before the target kernel module. This tests the livepatch +# core's module_coming handler. +# +# - On livepatch enable, only pre/post-patch callbacks are executed for +# currently loaded klp_objects, in this case, vmlinux. +# +# - When a targeted module is subsequently loaded, only its +# pre/post-patch callbacks are executed. +# +# - On livepatch disable, all currently loaded klp_objects' (vmlinux and +# $MOD_TARGET) pre/post-unpatch callbacks are executed. + +start_test "module_coming notifier" + +load_lp $MOD_LIVEPATCH +load_mod $MOD_TARGET +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH +unload_mod $MOD_TARGET + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': patching complete +% modprobe $MOD_TARGET +livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_TARGET: ${MOD_TARGET}_init +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit" + + +# Test loading the livepatch after a targeted kernel module, then unload +# the kernel module before disabling the livepatch. This tests the +# livepatch core's module_going handler. +# +# - First load a target module, then the livepatch. +# +# - When a target module is unloaded, the livepatch is only reverted +# from that klp_object ($MOD_TARGET). As such, only its pre and +# post-unpatch callbacks are executed when this occurs. +# +# - When the livepatch is disabled, pre and post-unpatch callbacks are +# run for the remaining klp_object, vmlinux. + +start_test "module_going notifier" + +load_mod $MOD_TARGET +load_lp $MOD_LIVEPATCH +unload_mod $MOD_TARGET +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH + +check_result "% modprobe $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_init +% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': patching complete +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit +$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET' +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH" + + +# This test is similar to the previous test, however the livepatch is +# loaded first. This tests the livepatch core's module_coming and +# module_going handlers. +# +# - First load the livepatch. +# +# - When a targeted kernel module is subsequently loaded, only its +# pre/post-patch callbacks are executed. +# +# - When the target module is unloaded, the livepatch is only reverted +# from the $MOD_TARGET klp_object. As such, only pre and +# post-unpatch callbacks are executed when this occurs. + +start_test "module_coming and module_going notifiers" + +load_lp $MOD_LIVEPATCH +load_mod $MOD_TARGET +unload_mod $MOD_TARGET +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': patching complete +% modprobe $MOD_TARGET +livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_TARGET: ${MOD_TARGET}_init +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit +$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET' +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH" + + +# A simple test of loading a livepatch without one of its patch target +# klp_objects ever loaded ($MOD_TARGET). +# +# - Load the livepatch. +# +# - As expected, only pre/post-(un)patch handlers are executed for +# vmlinux. + +start_test "target module not present" + +load_lp $MOD_LIVEPATCH +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': patching complete +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH" + + +# Test a scenario where a vmlinux pre-patch callback returns a non-zero +# status (ie, failure). +# +# - First load a target module. +# +# - Load the livepatch module, setting its 'pre_patch_ret' value to -19 +# (-ENODEV). When its vmlinux pre-patch callback executes, this +# status code will propagate back to the module-loading subsystem. +# The result is that the insmod command refuses to load the livepatch +# module. + +start_test "pre-patch callback -ENODEV" + +load_mod $MOD_TARGET +load_failing_mod $MOD_LIVEPATCH pre_patch_ret=-19 +unload_mod $MOD_TARGET + +check_result "% modprobe $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_init +% modprobe $MOD_LIVEPATCH pre_patch_ret=-19 +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +test_klp_callbacks_demo: pre_patch_callback: vmlinux +livepatch: pre-patch callback failed for object 'vmlinux' +livepatch: failed to enable patch '$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': No such device +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit" + + +# Similar to the previous test, setup a livepatch such that its vmlinux +# pre-patch callback returns success. However, when a targeted kernel +# module is later loaded, have the livepatch return a failing status +# code. +# +# - Load the livepatch, vmlinux pre-patch callback succeeds. +# +# - Set a trap so subsequent pre-patch callbacks to this livepatch will +# return -ENODEV. +# +# - The livepatch pre-patch callback for subsequently loaded target +# modules will return failure, so the module loader refuses to load +# the kernel module. No post-patch or pre/post-unpatch callbacks are +# executed for this klp_object. +# +# - Pre/post-unpatch callbacks are run for the vmlinux klp_object. + +start_test "module_coming + pre-patch callback -ENODEV" + +load_lp $MOD_LIVEPATCH +set_pre_patch_ret $MOD_LIVEPATCH -19 +load_failing_mod $MOD_TARGET +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': patching complete +% echo -19 > /sys/module/$MOD_LIVEPATCH/parameters/pre_patch_ret +% modprobe $MOD_TARGET +livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +livepatch: pre-patch callback failed for object '$MOD_TARGET' +livepatch: patch '$MOD_LIVEPATCH' failed for module '$MOD_TARGET', refusing to load module '$MOD_TARGET' +modprobe: ERROR: could not insert '$MOD_TARGET': No such device +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH" + + +# Test loading multiple targeted kernel modules. This test-case is +# mainly for comparing with the next test-case. +# +# - Load a target "busy" kernel module which kicks off a worker function +# that immediately exits. +# +# - Proceed with loading the livepatch and another ordinary target +# module. Post-patch callbacks are executed and the transition +# completes quickly. + +start_test "multiple target modules" + +load_mod $MOD_TARGET_BUSY block_transition=N +load_lp $MOD_LIVEPATCH +load_mod $MOD_TARGET +unload_mod $MOD_TARGET +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH +unload_mod $MOD_TARGET_BUSY + +check_result "% modprobe $MOD_TARGET_BUSY block_transition=N +$MOD_TARGET_BUSY: ${MOD_TARGET_BUSY}_init +$MOD_TARGET_BUSY: busymod_work_func enter +$MOD_TARGET_BUSY: busymod_work_func exit +% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': patching complete +% modprobe $MOD_TARGET +livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_TARGET: ${MOD_TARGET}_init +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit +$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET' +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH +% rmmod $MOD_TARGET_BUSY +$MOD_TARGET_BUSY: ${MOD_TARGET_BUSY}_exit" + + +# A similar test as the previous one, but force the "busy" kernel module +# to block the livepatch transition. +# +# The livepatching core will refuse to patch a task that is currently +# executing a to-be-patched function -- the consistency model stalls the +# current patch transition until this safety-check is met. Test a +# scenario where one of a livepatch's target klp_objects sits on such a +# function for a long time. Meanwhile, load and unload other target +# kernel modules while the livepatch transition is in progress. +# +# - Load the "busy" kernel module, this time make its work function loop +# +# - Meanwhile, the livepatch is loaded. Notice that the patch +# transition does not complete as the targeted "busy" module is +# sitting on a to-be-patched function. +# +# - Load a second target module (this one is an ordinary idle kernel +# module). Note that *no* post-patch callbacks will be executed while +# the livepatch is still in transition. +# +# - Request an unload of the simple kernel module. The patch is still +# transitioning, so its pre-unpatch callbacks are skipped. +# +# - Finally the livepatch is disabled. Since none of the patch's +# klp_object's post-patch callbacks executed, the remaining +# klp_object's pre-unpatch callbacks are skipped. + +start_test "busy target module" + +load_mod $MOD_TARGET_BUSY block_transition=Y +load_lp_nowait $MOD_LIVEPATCH + +# Wait until the livepatch reports in-transition state, i.e. that it's +# stalled on $MOD_TARGET_BUSY::busymod_work_func() +loop_until 'grep -q '^1$' /sys/kernel/livepatch/$MOD_LIVEPATCH/transition' || + die "failed to stall transition" + +load_mod $MOD_TARGET +unload_mod $MOD_TARGET +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH +unload_mod $MOD_TARGET_BUSY + +check_result "% modprobe $MOD_TARGET_BUSY block_transition=Y +$MOD_TARGET_BUSY: ${MOD_TARGET_BUSY}_init +$MOD_TARGET_BUSY: busymod_work_func enter +% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': starting patching transition +% modprobe $MOD_TARGET +livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' +$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init +$MOD_TARGET: ${MOD_TARGET}_init +% rmmod $MOD_TARGET +$MOD_TARGET: ${MOD_TARGET}_exit +livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET' +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': reversing transition from patching to unpatching +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH +% rmmod $MOD_TARGET_BUSY +$MOD_TARGET_BUSY: busymod_work_func exit +$MOD_TARGET_BUSY: ${MOD_TARGET_BUSY}_exit" + + +# Test loading multiple livepatches. This test-case is mainly for comparing +# with the next test-case. +# +# - Load and unload two livepatches, pre and post (un)patch callbacks +# execute as each patch progresses through its (un)patching +# transition. + +start_test "multiple livepatches" + +load_lp $MOD_LIVEPATCH +load_lp $MOD_LIVEPATCH2 +disable_lp $MOD_LIVEPATCH2 +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': patching complete +% modprobe $MOD_LIVEPATCH2 +livepatch: enabling patch '$MOD_LIVEPATCH2' +livepatch: '$MOD_LIVEPATCH2': initializing patching transition +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': starting patching transition +livepatch: '$MOD_LIVEPATCH2': completing patching transition +$MOD_LIVEPATCH2: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': patching complete +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled +livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition +$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': starting unpatching transition +livepatch: '$MOD_LIVEPATCH2': completing unpatching transition +$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': unpatching complete +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled +livepatch: '$MOD_LIVEPATCH': initializing unpatching transition +$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH2 +% rmmod $MOD_LIVEPATCH" + + +# Load multiple livepatches, but the second as an 'atomic-replace' +# patch. When the latter loads, the original livepatch should be +# disabled and *none* of its pre/post-unpatch callbacks executed. On +# the other hand, when the atomic-replace livepatch is disabled, its +# pre/post-unpatch callbacks *should* be executed. +# +# - Load and unload two livepatches, the second of which has its +# .replace flag set true. +# +# - Pre and post patch callbacks are executed for both livepatches. +# +# - Once the atomic replace module is loaded, only its pre and post +# unpatch callbacks are executed. + +start_test "atomic replace" + +load_lp $MOD_LIVEPATCH +load_lp $MOD_LIVEPATCH2 replace=1 +disable_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH': patching complete +% modprobe $MOD_LIVEPATCH2 replace=1 +livepatch: enabling patch '$MOD_LIVEPATCH2' +livepatch: '$MOD_LIVEPATCH2': initializing patching transition +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': starting patching transition +livepatch: '$MOD_LIVEPATCH2': completing patching transition +$MOD_LIVEPATCH2: post_patch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': patching complete +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled +livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition +$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': starting unpatching transition +livepatch: '$MOD_LIVEPATCH2': completing unpatching transition +$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux +livepatch: '$MOD_LIVEPATCH2': unpatching complete +% rmmod $MOD_LIVEPATCH2 +% rmmod $MOD_LIVEPATCH" + + +exit 0 |