| #!/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 |
