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2eeb0d457d
Inspired by commit f131d9edc2 ("selftests/lkdtm: Don't clear dmesg
when running tests"), keep a reference dmesg copy when beginning each
test. This way check_result() can compare against the initial copy
rather than relying upon an empty log.
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Reviewed-by: Yannick Cote <ycote@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200618181040.21132-2-joe.lawrence@redhat.com
163 lines
5.5 KiB
Bash
Executable File
163 lines
5.5 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018 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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MOD_REPLACE=test_klp_atomic_replace
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setup_config
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# - load a livepatch that modifies the output from /proc/cmdline and
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# verify correct behavior
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# - unload the livepatch and make sure the patch was removed
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start_test "basic function patching"
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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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disable_lp $MOD_LIVEPATCH
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unload_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_result "% 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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% 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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# - load a livepatch that modifies the output from /proc/cmdline and
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# verify correct behavior
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# - load another livepatch and verify that both livepatches are active
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# - unload the second livepatch and verify that the first is still active
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# - unload the first livepatch and verify none are active
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start_test "multiple livepatches"
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load_lp $MOD_LIVEPATCH
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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load_lp $MOD_REPLACE replace=0
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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disable_lp $MOD_REPLACE
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unload_lp $MOD_REPLACE
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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disable_lp $MOD_LIVEPATCH
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unload_lp $MOD_LIVEPATCH
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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check_result "% 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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$MOD_LIVEPATCH: this has been live patched
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% modprobe $MOD_REPLACE replace=0
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livepatch: enabling patch '$MOD_REPLACE'
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livepatch: '$MOD_REPLACE': initializing patching transition
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livepatch: '$MOD_REPLACE': starting patching transition
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livepatch: '$MOD_REPLACE': completing patching transition
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livepatch: '$MOD_REPLACE': patching complete
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$MOD_LIVEPATCH: this has been live patched
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$MOD_REPLACE: this has been live patched
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% echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
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livepatch: '$MOD_REPLACE': initializing unpatching transition
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livepatch: '$MOD_REPLACE': starting unpatching transition
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livepatch: '$MOD_REPLACE': completing unpatching transition
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livepatch: '$MOD_REPLACE': unpatching complete
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% rmmod $MOD_REPLACE
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$MOD_LIVEPATCH: this has been live patched
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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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# - load a livepatch that modifies the output from /proc/cmdline and
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# verify correct behavior
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# - load an atomic replace livepatch and verify that only the second is active
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# - remove the first livepatch and verify that the atomic replace livepatch
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# is still active
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# - remove the atomic replace livepatch and verify that none are active
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start_test "atomic replace livepatch"
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load_lp $MOD_LIVEPATCH
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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load_lp $MOD_REPLACE replace=1
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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unload_lp $MOD_LIVEPATCH
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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disable_lp $MOD_REPLACE
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unload_lp $MOD_REPLACE
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grep 'live patched' /proc/cmdline > /dev/kmsg
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grep 'live patched' /proc/meminfo > /dev/kmsg
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check_result "% 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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$MOD_LIVEPATCH: this has been live patched
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% modprobe $MOD_REPLACE replace=1
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livepatch: enabling patch '$MOD_REPLACE'
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livepatch: '$MOD_REPLACE': initializing patching transition
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livepatch: '$MOD_REPLACE': starting patching transition
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livepatch: '$MOD_REPLACE': completing patching transition
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livepatch: '$MOD_REPLACE': patching complete
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$MOD_REPLACE: this has been live patched
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% rmmod $MOD_LIVEPATCH
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$MOD_REPLACE: this has been live patched
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% echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
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livepatch: '$MOD_REPLACE': initializing unpatching transition
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livepatch: '$MOD_REPLACE': starting unpatching transition
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livepatch: '$MOD_REPLACE': completing unpatching transition
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livepatch: '$MOD_REPLACE': unpatching complete
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% rmmod $MOD_REPLACE"
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exit 0
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