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selftests: livepatch: Check if patched sysfs attribute exists

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The commit bb26cfd9e7
("livepatch: add sysfs entry "patched" for each klp_object") was merged
in v6.1, introducing a new sysfs attribute.

In order to run the selftests on older kernels, check if given kernel
has support for the attribute. If the attribute is not supported, skip
the checks.

Along with this change, use MOD_LIVEPATCH2 variable instead of
reassigning a new value to MOD_LIVEPATCH, and also use the variable
names in the check_result, to avoid using the module names.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-4-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Marcos Paulo de Souza 2026-05-04 15:34:45 -03:00 committed by Petr Mladek
parent cdc1848ba0
commit e6b71aefae
1 changed files with 47 additions and 40 deletions
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87
tools/testing/selftests/livepatch/test-sysfs.sh
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@ -8,6 +8,8 @@ MOD_LIVEPATCH=test_klp_livepatch
MOD_LIVEPATCH2=test_klp_callbacks_demo
MOD_LIVEPATCH3=test_klp_syscall
HAS_PATCH_ATTR=0
setup_config
# - load a livepatch and verifies the sysfs entries work as expected
@ -25,8 +27,12 @@ check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "stack_order" "1"
check_sysfs_rights "$MOD_LIVEPATCH" "transition" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "transition" "0"
check_sysfs_rights "$MOD_LIVEPATCH" "vmlinux/patched" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "vmlinux/patched" "1"
if does_sysfs_exist "$MOD_LIVEPATCH/vmlinux" "patched"; then
check_sysfs_rights "$MOD_LIVEPATCH" "vmlinux/patched" "-r--r--r--"
check_sysfs_value "$MOD_LIVEPATCH" "vmlinux/patched" "1"
HAS_PATCH_ATTR=1
fi
disable_lp $MOD_LIVEPATCH
@ -45,48 +51,49 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition
livepatch: '$MOD_LIVEPATCH': unpatching complete
% rmmod $MOD_LIVEPATCH"
start_test "sysfs test object/patched"
if [[ "$HAS_PATCH_ATTR" == "1" ]]; then
start_test "sysfs test object/patched"
MOD_LIVEPATCH=test_klp_callbacks_demo
MOD_TARGET=test_klp_callbacks_mod
load_lp $MOD_LIVEPATCH
MOD_TARGET=test_klp_callbacks_mod
load_lp $MOD_LIVEPATCH2
# check the "patch" file changes as target module loads/unloads
check_sysfs_value "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "0"
load_mod $MOD_TARGET
check_sysfs_value "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "1"
unload_mod $MOD_TARGET
check_sysfs_value "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "0"
# check the "patch" file changes as target module loads/unloads
check_sysfs_value "$MOD_LIVEPATCH2" "$MOD_TARGET/patched" "0"
load_mod $MOD_TARGET
check_sysfs_value "$MOD_LIVEPATCH2" "$MOD_TARGET/patched" "1"
unload_mod $MOD_TARGET
check_sysfs_value "$MOD_LIVEPATCH2" "$MOD_TARGET/patched" "0"
disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH
disable_lp $MOD_LIVEPATCH2
unload_lp $MOD_LIVEPATCH2
check_result "% insmod test_modules/test_klp_callbacks_demo.ko
livepatch: enabling patch 'test_klp_callbacks_demo'
livepatch: 'test_klp_callbacks_demo': initializing patching transition
test_klp_callbacks_demo: pre_patch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': starting patching transition
livepatch: 'test_klp_callbacks_demo': completing patching transition
test_klp_callbacks_demo: post_patch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': patching complete
% insmod test_modules/test_klp_callbacks_mod.ko
livepatch: applying patch 'test_klp_callbacks_demo' to loading module 'test_klp_callbacks_mod'
test_klp_callbacks_demo: pre_patch_callback: test_klp_callbacks_mod -> [MODULE_STATE_COMING] Full formed, running module_init
test_klp_callbacks_demo: post_patch_callback: test_klp_callbacks_mod -> [MODULE_STATE_COMING] Full formed, running module_init
test_klp_callbacks_mod: test_klp_callbacks_mod_init
% rmmod test_klp_callbacks_mod
test_klp_callbacks_mod: test_klp_callbacks_mod_exit
test_klp_callbacks_demo: pre_unpatch_callback: test_klp_callbacks_mod -> [MODULE_STATE_GOING] Going away
livepatch: reverting patch 'test_klp_callbacks_demo' on unloading module 'test_klp_callbacks_mod'
test_klp_callbacks_demo: post_unpatch_callback: test_klp_callbacks_mod -> [MODULE_STATE_GOING] Going away
% echo 0 > $SYSFS_KLP_DIR/test_klp_callbacks_demo/enabled
livepatch: 'test_klp_callbacks_demo': initializing unpatching transition
test_klp_callbacks_demo: pre_unpatch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': starting unpatching transition
livepatch: 'test_klp_callbacks_demo': completing unpatching transition
test_klp_callbacks_demo: post_unpatch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': unpatching complete
% rmmod test_klp_callbacks_demo"
check_result "% insmod test_modules/$MOD_LIVEPATCH2.ko
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
% insmod test_modules/$MOD_TARGET.ko
livepatch: applying patch '$MOD_LIVEPATCH2' to loading module '$MOD_TARGET'
$MOD_LIVEPATCH2: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init
$MOD_LIVEPATCH2: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init
$MOD_TARGET: test_klp_callbacks_mod_init
% rmmod $MOD_TARGET
$MOD_TARGET: test_klp_callbacks_mod_exit
$MOD_LIVEPATCH2: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
livepatch: reverting patch '$MOD_LIVEPATCH2' on unloading module '$MOD_TARGET'
$MOD_LIVEPATCH2: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
% echo 0 > $SYSFS_KLP_DIR/$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"
fi
start_test "sysfs test replace enabled"