65 lines
2.3 KiB
Bash
65 lines
2.3 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2019 Joe Lawrence <joe.lawrence@redhat.com>
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. $(dirname $0)/functions.sh
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MOD_LIVEPATCH=test_klp_livepatch
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setup_config
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# - turn ftrace_enabled OFF and verify livepatches can't load
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# - turn ftrace_enabled ON and verify livepatch can load
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# - verify that ftrace_enabled can't be turned OFF while a livepatch is loaded
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start_test "livepatch interaction with ftrace_enabled sysctl"
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set_ftrace_enabled 0
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load_failing_mod $MOD_LIVEPATCH
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set_ftrace_enabled 1
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load_lp $MOD_LIVEPATCH
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if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
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echo -e "FAIL\n\n"
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die "livepatch kselftest(s) failed"
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fi
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# Check that ftrace could not get disabled when a livepatch is enabled
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set_ftrace_enabled --fail 0
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if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then
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echo -e "FAIL\n\n"
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die "livepatch kselftest(s) failed"
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fi
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disable_lp $MOD_LIVEPATCH
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unload_lp $MOD_LIVEPATCH
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check_result "livepatch: kernel.ftrace_enabled = 0
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% modprobe $MOD_LIVEPATCH
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livepatch: enabling patch '$MOD_LIVEPATCH'
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livepatch: '$MOD_LIVEPATCH': initializing patching transition
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livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16)
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livepatch: failed to patch object 'vmlinux'
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livepatch: failed to enable patch '$MOD_LIVEPATCH'
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livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch
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livepatch: '$MOD_LIVEPATCH': completing unpatching transition
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livepatch: '$MOD_LIVEPATCH': unpatching complete
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modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Device or resource busy
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livepatch: kernel.ftrace_enabled = 1
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% modprobe $MOD_LIVEPATCH
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livepatch: enabling patch '$MOD_LIVEPATCH'
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livepatch: '$MOD_LIVEPATCH': initializing patching transition
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livepatch: '$MOD_LIVEPATCH': starting patching transition
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livepatch: '$MOD_LIVEPATCH': completing patching transition
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livepatch: '$MOD_LIVEPATCH': patching complete
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livepatch: sysctl: setting key \"kernel.ftrace_enabled\": Device or resource busy
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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livepatch: '$MOD_LIVEPATCH': completing unpatching transition
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livepatch: '$MOD_LIVEPATCH': unpatching complete
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% rmmod $MOD_LIVEPATCH"
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exit 0
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