Commit 920e5001 authored by Marcos Paulo de Souza's avatar Marcos Paulo de Souza Committed by Petr Mladek
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selftests: livepatch: test-ftrace: livepatch a traced function 



This is basically the inverse case of commit 474eecc8
("selftests: livepatch: test if ftrace can trace a livepatched function")
but ensuring that livepatch would work on a traced function.

Signed-off-by: default avatarMarcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.com>
Tested-by: default avatarPetr Mladek <pmladek@suse.com>
Acked-by: default avatarMiroslav Benes <mbenes@suse.cz>
Acked-by: default avatarJoe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260220-lp-test-trace-v1-1-4b6703cd01a6@suse.com


[pmladek: Fixed a typo found by Joe.]
Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
parent 51ab33fc

tools/testing/selftests/livepatch/test-ftrace.sh

+36 −0
Original line number Diff line number Diff line
@@ -95,4 +95,40 @@ livepatch: '$MOD_LIVEPATCH': completing unpatching transition 
livepatch: '$MOD_LIVEPATCH': unpatching complete

% rmmod $MOD_LIVEPATCH"





# - trace a function

# - verify livepatch can load targgeting on the same traced function

# - check if the livepatch is in effect

# - reset trace and unload livepatch



start_test "livepatch a traced function and check that the live patch remains in effect"



FUNCTION_NAME="cmdline_proc_show"



trace_function "$FUNCTION_NAME"

load_lp $MOD_LIVEPATCH



if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH: this has been live patched" ]] ; then

	log "livepatch: ok"

fi



check_traced_functions "$FUNCTION_NAME"



disable_lp $MOD_LIVEPATCH

unload_lp $MOD_LIVEPATCH



check_result "% insmod test_modules/$MOD_LIVEPATCH.ko

livepatch: enabling patch '$MOD_LIVEPATCH'

livepatch: '$MOD_LIVEPATCH': initializing patching transition

livepatch: '$MOD_LIVEPATCH': starting patching transition

livepatch: '$MOD_LIVEPATCH': completing patching transition

livepatch: '$MOD_LIVEPATCH': patching complete

livepatch: ok

% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled

livepatch: '$MOD_LIVEPATCH': initializing unpatching transition

livepatch: '$MOD_LIVEPATCH': starting unpatching transition

livepatch: '$MOD_LIVEPATCH': completing unpatching transition

livepatch: '$MOD_LIVEPATCH': unpatching complete

% rmmod $MOD_LIVEPATCH"



exit 0