From 29d968e13007e067b35d41a047e2a4573a017194 Mon Sep 17 00:00:00 2001 From: Miroslav Benes Date: Fri, 25 Oct 2019 13:50:41 +0200 Subject: selftests/livepatch: Disable the timeout Commit 852c8cbf34d3 ("selftests/kselftest/runner.sh: Add 45 second timeout per test") introduced a timeout per test. Livepatch tests could run longer than 45 seconds, especially on slower machines. They do not hang and they detect if something goes awry with internal accounting. Better than looking for an arbitrary value, just disable the timeout for livepatch selftests. Signed-off-by: Miroslav Benes Reviewed-by: Joe Lawrence Signed-off-by: Jiri Kosina --- tools/testing/selftests/livepatch/settings | 1 + 1 file changed, 1 insertion(+) create mode 100644 tools/testing/selftests/livepatch/settings (limited to 'tools/testing') diff --git a/tools/testing/selftests/livepatch/settings b/tools/testing/selftests/livepatch/settings new file mode 100644 index 000000000000..e7b9417537fb --- /dev/null +++ b/tools/testing/selftests/livepatch/settings @@ -0,0 +1 @@ +timeout=0 -- cgit v1.2.3-59-g8ed1b From ecd25094c5f5d5af12dffd3a4f2f4a42e486cdd8 Mon Sep 17 00:00:00 2001 From: Petr Mladek Date: Wed, 30 Oct 2019 16:43:13 +0100 Subject: livepatch: Selftests of the API for tracking system state changes Four selftests for the new API. Link: http://lkml.kernel.org/r/20191030154313.13263-6-pmladek@suse.com To: Jiri Kosina Cc: Kamalesh Babulal Cc: Nicolai Stange Cc: live-patching@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Miroslav Benes Acked-by: Joe Lawrence Acked-by: Josh Poimboeuf Signed-off-by: Petr Mladek --- lib/livepatch/Makefile | 5 +- lib/livepatch/test_klp_state.c | 162 ++++++++++++++++++++ lib/livepatch/test_klp_state2.c | 191 ++++++++++++++++++++++++ lib/livepatch/test_klp_state3.c | 5 + tools/testing/selftests/livepatch/Makefile | 3 +- tools/testing/selftests/livepatch/test-state.sh | 180 ++++++++++++++++++++++ 6 files changed, 544 insertions(+), 2 deletions(-) create mode 100644 lib/livepatch/test_klp_state.c create mode 100644 lib/livepatch/test_klp_state2.c create mode 100644 lib/livepatch/test_klp_state3.c create mode 100755 tools/testing/selftests/livepatch/test-state.sh (limited to 'tools/testing') diff --git a/lib/livepatch/Makefile b/lib/livepatch/Makefile index 26900ddaef82..295b94bff370 100644 --- a/lib/livepatch/Makefile +++ b/lib/livepatch/Makefile @@ -8,7 +8,10 @@ obj-$(CONFIG_TEST_LIVEPATCH) += test_klp_atomic_replace.o \ test_klp_callbacks_busy.o \ test_klp_callbacks_mod.o \ test_klp_livepatch.o \ - test_klp_shadow_vars.o + test_klp_shadow_vars.o \ + test_klp_state.o \ + test_klp_state2.o \ + test_klp_state3.o # Target modules to be livepatched require CC_FLAGS_FTRACE CFLAGS_test_klp_callbacks_busy.o += $(CC_FLAGS_FTRACE) diff --git a/lib/livepatch/test_klp_state.c b/lib/livepatch/test_klp_state.c new file mode 100644 index 000000000000..57a4253acb01 --- /dev/null +++ b/lib/livepatch/test_klp_state.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 SUSE + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +#define CONSOLE_LOGLEVEL_STATE 1 +/* Version 1 does not support migration. */ +#define CONSOLE_LOGLEVEL_STATE_VERSION 1 + +static const char *const module_state[] = { + [MODULE_STATE_LIVE] = "[MODULE_STATE_LIVE] Normal state", + [MODULE_STATE_COMING] = "[MODULE_STATE_COMING] Full formed, running module_init", + [MODULE_STATE_GOING] = "[MODULE_STATE_GOING] Going away", + [MODULE_STATE_UNFORMED] = "[MODULE_STATE_UNFORMED] Still setting it up", +}; + +static void callback_info(const char *callback, struct klp_object *obj) +{ + if (obj->mod) + pr_info("%s: %s -> %s\n", callback, obj->mod->name, + module_state[obj->mod->state]); + else + pr_info("%s: vmlinux\n", callback); +} + +static struct klp_patch patch; + +static int allocate_loglevel_state(void) +{ + struct klp_state *loglevel_state; + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return -EINVAL; + + loglevel_state->data = kzalloc(sizeof(console_loglevel), GFP_KERNEL); + if (!loglevel_state->data) + return -ENOMEM; + + pr_info("%s: allocating space to store console_loglevel\n", + __func__); + return 0; +} + +static void fix_console_loglevel(void) +{ + struct klp_state *loglevel_state; + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return; + + pr_info("%s: fixing console_loglevel\n", __func__); + *(int *)loglevel_state->data = console_loglevel; + console_loglevel = CONSOLE_LOGLEVEL_MOTORMOUTH; +} + +static void restore_console_loglevel(void) +{ + struct klp_state *loglevel_state; + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return; + + pr_info("%s: restoring console_loglevel\n", __func__); + console_loglevel = *(int *)loglevel_state->data; +} + +static void free_loglevel_state(void) +{ + struct klp_state *loglevel_state; + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return; + + pr_info("%s: freeing space for the stored console_loglevel\n", + __func__); + kfree(loglevel_state->data); +} + +/* Executed on object patching (ie, patch enablement) */ +static int pre_patch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + return allocate_loglevel_state(); +} + +/* Executed on object unpatching (ie, patch disablement) */ +static void post_patch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + fix_console_loglevel(); +} + +/* Executed on object unpatching (ie, patch disablement) */ +static void pre_unpatch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + restore_console_loglevel(); +} + +/* Executed on object unpatching (ie, patch disablement) */ +static void post_unpatch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + free_loglevel_state(); +} + +static struct klp_func no_funcs[] = { + {} +}; + +static struct klp_object objs[] = { + { + .name = NULL, /* vmlinux */ + .funcs = no_funcs, + .callbacks = { + .pre_patch = pre_patch_callback, + .post_patch = post_patch_callback, + .pre_unpatch = pre_unpatch_callback, + .post_unpatch = post_unpatch_callback, + }, + }, { } +}; + +static struct klp_state states[] = { + { + .id = CONSOLE_LOGLEVEL_STATE, + .version = CONSOLE_LOGLEVEL_STATE_VERSION, + }, { } +}; + +static struct klp_patch patch = { + .mod = THIS_MODULE, + .objs = objs, + .states = states, + .replace = true, +}; + +static int test_klp_callbacks_demo_init(void) +{ + return klp_enable_patch(&patch); +} + +static void test_klp_callbacks_demo_exit(void) +{ +} + +module_init(test_klp_callbacks_demo_init); +module_exit(test_klp_callbacks_demo_exit); +MODULE_LICENSE("GPL"); +MODULE_INFO(livepatch, "Y"); +MODULE_AUTHOR("Petr Mladek "); +MODULE_DESCRIPTION("Livepatch test: system state modification"); diff --git a/lib/livepatch/test_klp_state2.c b/lib/livepatch/test_klp_state2.c new file mode 100644 index 000000000000..c978ea4d5e67 --- /dev/null +++ b/lib/livepatch/test_klp_state2.c @@ -0,0 +1,191 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 SUSE + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +#define CONSOLE_LOGLEVEL_STATE 1 +/* Version 2 supports migration. */ +#define CONSOLE_LOGLEVEL_STATE_VERSION 2 + +static const char *const module_state[] = { + [MODULE_STATE_LIVE] = "[MODULE_STATE_LIVE] Normal state", + [MODULE_STATE_COMING] = "[MODULE_STATE_COMING] Full formed, running module_init", + [MODULE_STATE_GOING] = "[MODULE_STATE_GOING] Going away", + [MODULE_STATE_UNFORMED] = "[MODULE_STATE_UNFORMED] Still setting it up", +}; + +static void callback_info(const char *callback, struct klp_object *obj) +{ + if (obj->mod) + pr_info("%s: %s -> %s\n", callback, obj->mod->name, + module_state[obj->mod->state]); + else + pr_info("%s: vmlinux\n", callback); +} + +static struct klp_patch patch; + +static int allocate_loglevel_state(void) +{ + struct klp_state *loglevel_state, *prev_loglevel_state; + + prev_loglevel_state = klp_get_prev_state(CONSOLE_LOGLEVEL_STATE); + if (prev_loglevel_state) { + pr_info("%s: space to store console_loglevel already allocated\n", + __func__); + return 0; + } + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return -EINVAL; + + loglevel_state->data = kzalloc(sizeof(console_loglevel), GFP_KERNEL); + if (!loglevel_state->data) + return -ENOMEM; + + pr_info("%s: allocating space to store console_loglevel\n", + __func__); + return 0; +} + +static void fix_console_loglevel(void) +{ + struct klp_state *loglevel_state, *prev_loglevel_state; + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return; + + prev_loglevel_state = klp_get_prev_state(CONSOLE_LOGLEVEL_STATE); + if (prev_loglevel_state) { + pr_info("%s: taking over the console_loglevel change\n", + __func__); + loglevel_state->data = prev_loglevel_state->data; + return; + } + + pr_info("%s: fixing console_loglevel\n", __func__); + *(int *)loglevel_state->data = console_loglevel; + console_loglevel = CONSOLE_LOGLEVEL_MOTORMOUTH; +} + +static void restore_console_loglevel(void) +{ + struct klp_state *loglevel_state, *prev_loglevel_state; + + prev_loglevel_state = klp_get_prev_state(CONSOLE_LOGLEVEL_STATE); + if (prev_loglevel_state) { + pr_info("%s: passing the console_loglevel change back to the old livepatch\n", + __func__); + return; + } + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return; + + pr_info("%s: restoring console_loglevel\n", __func__); + console_loglevel = *(int *)loglevel_state->data; +} + +static void free_loglevel_state(void) +{ + struct klp_state *loglevel_state, *prev_loglevel_state; + + prev_loglevel_state = klp_get_prev_state(CONSOLE_LOGLEVEL_STATE); + if (prev_loglevel_state) { + pr_info("%s: keeping space to store console_loglevel\n", + __func__); + return; + } + + loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE); + if (!loglevel_state) + return; + + pr_info("%s: freeing space for the stored console_loglevel\n", + __func__); + kfree(loglevel_state->data); +} + +/* Executed on object patching (ie, patch enablement) */ +static int pre_patch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + return allocate_loglevel_state(); +} + +/* Executed on object unpatching (ie, patch disablement) */ +static void post_patch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + fix_console_loglevel(); +} + +/* Executed on object unpatching (ie, patch disablement) */ +static void pre_unpatch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + restore_console_loglevel(); +} + +/* Executed on object unpatching (ie, patch disablement) */ +static void post_unpatch_callback(struct klp_object *obj) +{ + callback_info(__func__, obj); + free_loglevel_state(); +} + +static struct klp_func no_funcs[] = { + {} +}; + +static struct klp_object objs[] = { + { + .name = NULL, /* vmlinux */ + .funcs = no_funcs, + .callbacks = { + .pre_patch = pre_patch_callback, + .post_patch = post_patch_callback, + .pre_unpatch = pre_unpatch_callback, + .post_unpatch = post_unpatch_callback, + }, + }, { } +}; + +static struct klp_state states[] = { + { + .id = CONSOLE_LOGLEVEL_STATE, + .version = CONSOLE_LOGLEVEL_STATE_VERSION, + }, { } +}; + +static struct klp_patch patch = { + .mod = THIS_MODULE, + .objs = objs, + .states = states, + .replace = true, +}; + +static int test_klp_callbacks_demo_init(void) +{ + return klp_enable_patch(&patch); +} + +static void test_klp_callbacks_demo_exit(void) +{ +} + +module_init(test_klp_callbacks_demo_init); +module_exit(test_klp_callbacks_demo_exit); +MODULE_LICENSE("GPL"); +MODULE_INFO(livepatch, "Y"); +MODULE_AUTHOR("Petr Mladek "); +MODULE_DESCRIPTION("Livepatch test: system state modification"); diff --git a/lib/livepatch/test_klp_state3.c b/lib/livepatch/test_klp_state3.c new file mode 100644 index 000000000000..9226579d10c5 --- /dev/null +++ b/lib/livepatch/test_klp_state3.c @@ -0,0 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 SUSE + +/* The console loglevel fix is the same in the next cumulative patch. */ +#include "test_klp_state2.c" diff --git a/tools/testing/selftests/livepatch/Makefile b/tools/testing/selftests/livepatch/Makefile index fd405402c3ff..1cf40a9e7185 100644 --- a/tools/testing/selftests/livepatch/Makefile +++ b/tools/testing/selftests/livepatch/Makefile @@ -4,6 +4,7 @@ TEST_PROGS_EXTENDED := functions.sh TEST_PROGS := \ test-livepatch.sh \ test-callbacks.sh \ - test-shadow-vars.sh + test-shadow-vars.sh \ + test-state.sh include ../lib.mk diff --git a/tools/testing/selftests/livepatch/test-state.sh b/tools/testing/selftests/livepatch/test-state.sh new file mode 100755 index 000000000000..dc2908c22c26 --- /dev/null +++ b/tools/testing/selftests/livepatch/test-state.sh @@ -0,0 +1,180 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2019 SUSE + +. $(dirname $0)/functions.sh + +MOD_LIVEPATCH=test_klp_state +MOD_LIVEPATCH2=test_klp_state2 +MOD_LIVEPATCH3=test_klp_state3 + +set_dynamic_debug + + +# TEST: Loading and removing a module that modifies the system state + +echo -n "TEST: system state modification ... " +dmesg -C + +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 +$MOD_LIVEPATCH: allocate_loglevel_state: allocating space to store console_loglevel +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +$MOD_LIVEPATCH: fix_console_loglevel: fixing console_loglevel +livepatch: '$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: restore_console_loglevel: restoring console_loglevel +livepatch: '$MOD_LIVEPATCH': starting unpatching transition +livepatch: '$MOD_LIVEPATCH': completing unpatching transition +$MOD_LIVEPATCH: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH: free_loglevel_state: freeing space for the stored console_loglevel +livepatch: '$MOD_LIVEPATCH': unpatching complete +% rmmod $MOD_LIVEPATCH" + + +# TEST: Take over system state change by a cumulative patch + +echo -n "TEST: taking over system state modification ... " +dmesg -C + +load_lp $MOD_LIVEPATCH +load_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH +disable_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH2 + +check_result "% modprobe $MOD_LIVEPATCH +livepatch: enabling patch '$MOD_LIVEPATCH' +livepatch: '$MOD_LIVEPATCH': initializing patching transition +$MOD_LIVEPATCH: pre_patch_callback: vmlinux +$MOD_LIVEPATCH: allocate_loglevel_state: allocating space to store console_loglevel +livepatch: '$MOD_LIVEPATCH': starting patching transition +livepatch: '$MOD_LIVEPATCH': completing patching transition +$MOD_LIVEPATCH: post_patch_callback: vmlinux +$MOD_LIVEPATCH: fix_console_loglevel: fixing console_loglevel +livepatch: '$MOD_LIVEPATCH': patching complete +% modprobe $MOD_LIVEPATCH2 +livepatch: enabling patch '$MOD_LIVEPATCH2' +livepatch: '$MOD_LIVEPATCH2': initializing patching transition +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux +$MOD_LIVEPATCH2: allocate_loglevel_state: space to store console_loglevel already allocated +livepatch: '$MOD_LIVEPATCH2': starting patching transition +livepatch: '$MOD_LIVEPATCH2': completing patching transition +$MOD_LIVEPATCH2: post_patch_callback: vmlinux +$MOD_LIVEPATCH2: fix_console_loglevel: taking over the console_loglevel change +livepatch: '$MOD_LIVEPATCH2': patching complete +% rmmod $MOD_LIVEPATCH +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled +livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition +$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux +$MOD_LIVEPATCH2: restore_console_loglevel: restoring console_loglevel +livepatch: '$MOD_LIVEPATCH2': starting unpatching transition +livepatch: '$MOD_LIVEPATCH2': completing unpatching transition +$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH2: free_loglevel_state: freeing space for the stored console_loglevel +livepatch: '$MOD_LIVEPATCH2': unpatching complete +% rmmod $MOD_LIVEPATCH2" + + +# TEST: Take over system state change by a cumulative patch + +echo -n "TEST: compatible cumulative livepatches ... " +dmesg -C + +load_lp $MOD_LIVEPATCH2 +load_lp $MOD_LIVEPATCH3 +unload_lp $MOD_LIVEPATCH2 +load_lp $MOD_LIVEPATCH2 +disable_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH3 + +check_result "% modprobe $MOD_LIVEPATCH2 +livepatch: enabling patch '$MOD_LIVEPATCH2' +livepatch: '$MOD_LIVEPATCH2': initializing patching transition +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux +$MOD_LIVEPATCH2: allocate_loglevel_state: allocating space to store console_loglevel +livepatch: '$MOD_LIVEPATCH2': starting patching transition +livepatch: '$MOD_LIVEPATCH2': completing patching transition +$MOD_LIVEPATCH2: post_patch_callback: vmlinux +$MOD_LIVEPATCH2: fix_console_loglevel: fixing console_loglevel +livepatch: '$MOD_LIVEPATCH2': patching complete +% modprobe $MOD_LIVEPATCH3 +livepatch: enabling patch '$MOD_LIVEPATCH3' +livepatch: '$MOD_LIVEPATCH3': initializing patching transition +$MOD_LIVEPATCH3: pre_patch_callback: vmlinux +$MOD_LIVEPATCH3: allocate_loglevel_state: space to store console_loglevel already allocated +livepatch: '$MOD_LIVEPATCH3': starting patching transition +livepatch: '$MOD_LIVEPATCH3': completing patching transition +$MOD_LIVEPATCH3: post_patch_callback: vmlinux +$MOD_LIVEPATCH3: fix_console_loglevel: taking over the console_loglevel change +livepatch: '$MOD_LIVEPATCH3': patching complete +% rmmod $MOD_LIVEPATCH2 +% modprobe $MOD_LIVEPATCH2 +livepatch: enabling patch '$MOD_LIVEPATCH2' +livepatch: '$MOD_LIVEPATCH2': initializing patching transition +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux +$MOD_LIVEPATCH2: allocate_loglevel_state: space to store console_loglevel already allocated +livepatch: '$MOD_LIVEPATCH2': starting patching transition +livepatch: '$MOD_LIVEPATCH2': completing patching transition +$MOD_LIVEPATCH2: post_patch_callback: vmlinux +$MOD_LIVEPATCH2: fix_console_loglevel: taking over the console_loglevel change +livepatch: '$MOD_LIVEPATCH2': patching complete +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled +livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition +$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux +$MOD_LIVEPATCH2: restore_console_loglevel: restoring console_loglevel +livepatch: '$MOD_LIVEPATCH2': starting unpatching transition +livepatch: '$MOD_LIVEPATCH2': completing unpatching transition +$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH2: free_loglevel_state: freeing space for the stored console_loglevel +livepatch: '$MOD_LIVEPATCH2': unpatching complete +% rmmod $MOD_LIVEPATCH2 +% rmmod $MOD_LIVEPATCH3" + + +# TEST: Failure caused by incompatible cumulative livepatches + +echo -n "TEST: incompatible cumulative livepatches ... " +dmesg -C + +load_lp $MOD_LIVEPATCH2 +load_failing_mod $MOD_LIVEPATCH +disable_lp $MOD_LIVEPATCH2 +unload_lp $MOD_LIVEPATCH2 + +check_result "% modprobe $MOD_LIVEPATCH2 +livepatch: enabling patch '$MOD_LIVEPATCH2' +livepatch: '$MOD_LIVEPATCH2': initializing patching transition +$MOD_LIVEPATCH2: pre_patch_callback: vmlinux +$MOD_LIVEPATCH2: allocate_loglevel_state: allocating space to store console_loglevel +livepatch: '$MOD_LIVEPATCH2': starting patching transition +livepatch: '$MOD_LIVEPATCH2': completing patching transition +$MOD_LIVEPATCH2: post_patch_callback: vmlinux +$MOD_LIVEPATCH2: fix_console_loglevel: fixing console_loglevel +livepatch: '$MOD_LIVEPATCH2': patching complete +% modprobe $MOD_LIVEPATCH +livepatch: Livepatch patch ($MOD_LIVEPATCH) is not compatible with the already installed livepatches. +modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Invalid argument +% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled +livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition +$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux +$MOD_LIVEPATCH2: restore_console_loglevel: restoring console_loglevel +livepatch: '$MOD_LIVEPATCH2': starting unpatching transition +livepatch: '$MOD_LIVEPATCH2': completing unpatching transition +$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux +$MOD_LIVEPATCH2: free_loglevel_state: freeing space for the stored console_loglevel +livepatch: '$MOD_LIVEPATCH2': unpatching complete +% rmmod $MOD_LIVEPATCH2" + +exit 0 -- cgit v1.2.3-59-g8ed1b