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Livepatching changes for 6.13
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEESH4wyp42V4tXvYsjUqAMR0iAlPIFAmc7MNgACgkQUqAMR0iA lPKrRA/+MOGNP1YgLZ7Hql9RWqd8uNL5llFrN5dViYR03bZc+0sqSL0VO5dfhvyD 3L/EzI0E0Ne6E+cG5odo3AnUqU55ZlHEhMxz0vlxHQMCP8zXw/5d5s03JZEPaaD0 v4F88fqJNNcAeHbNnURsY8r6EjPwZqa7a8yV6mHm52CknlxhYkapwe28oXGhdrfA TAW8iXxYK4MxeITTjyAsPfe1LtTNm0uzeRdCriQZVXycFnN9ffE4EcrB7+HgwsRk cbemBiXXJ3/HE3he/MuFmwtI8A26Awcqc8Cj09VzMIDUFkZ2gSP5aVdRxM8u2lSQ yNAjXWnD4EPh+aJm1c0z3tihvcT55hX201Mlg8gR1QdOoAyCr3nA5wiodqnmyX1d edGulexXuoi2sZlMYHFDVeLdn+3CC7fIF6bOxLC8LHBbZBOAaxZDID0Irp9CGhHP OkDvtAfm6orEX3/MX0blo4Q1mYlgQvG05lP7aU4DRoPk7BZ/r23hcjHpwpxhNneu kQukflS8hmrAnUMm8+ttSvF/o0C76GIrmj1FM/aDtwcuB/9DNlC3DDuWcq/Pc79a 7W6dtAeOdGr+KoSmyfH903fZF6uJEn1A3tzFsVhVAqcpUWB3ENw7Uh91OcTxHoOE AYnblvTRSJSxhjZ5fP35wM9oSwyh9rB/bd6lY2ms0dW0RU7NXy0= =Zf0e -----END PGP SIGNATURE----- Merge tag 'livepatching-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching Pull livepatching update from Petr Mladek: - A new selftest for livepatching of a kprobed function * tag 'livepatching-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: selftests: livepatch: test livepatching a kprobed function selftests: livepatch: save and restore kprobe state selftests: livepatch: rename KLP_SYSFS_DIR to SYSFS_KLP_DIR
This commit is contained in:
commit
aa44f41470
@ -10,7 +10,8 @@ TEST_PROGS := \
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test-state.sh \
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test-ftrace.sh \
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test-sysfs.sh \
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test-syscall.sh
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test-syscall.sh \
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test-kprobe.sh
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TEST_FILES := settings
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@ -6,7 +6,10 @@
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MAX_RETRIES=600
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RETRY_INTERVAL=".1" # seconds
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KLP_SYSFS_DIR="/sys/kernel/livepatch"
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SYSFS_KERNEL_DIR="/sys/kernel"
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SYSFS_KLP_DIR="$SYSFS_KERNEL_DIR/livepatch"
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SYSFS_DEBUG_DIR="$SYSFS_KERNEL_DIR/debug"
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SYSFS_KPROBES_DIR="$SYSFS_DEBUG_DIR/kprobes"
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# Kselftest framework requirement - SKIP code is 4
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ksft_skip=4
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@ -55,22 +58,26 @@ function die() {
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}
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function push_config() {
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DYNAMIC_DEBUG=$(grep '^kernel/livepatch' /sys/kernel/debug/dynamic_debug/control | \
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DYNAMIC_DEBUG=$(grep '^kernel/livepatch' "$SYSFS_DEBUG_DIR/dynamic_debug/control" | \
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awk -F'[: ]' '{print "file " $1 " line " $2 " " $4}')
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FTRACE_ENABLED=$(sysctl --values kernel.ftrace_enabled)
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KPROBE_ENABLED=$(cat "$SYSFS_KPROBES_DIR/enabled")
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}
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function pop_config() {
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if [[ -n "$DYNAMIC_DEBUG" ]]; then
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echo -n "$DYNAMIC_DEBUG" > /sys/kernel/debug/dynamic_debug/control
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echo -n "$DYNAMIC_DEBUG" > "$SYSFS_DEBUG_DIR/dynamic_debug/control"
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fi
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if [[ -n "$FTRACE_ENABLED" ]]; then
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sysctl kernel.ftrace_enabled="$FTRACE_ENABLED" &> /dev/null
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fi
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if [[ -n "$KPROBE_ENABLED" ]]; then
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echo "$KPROBE_ENABLED" > "$SYSFS_KPROBES_DIR/enabled"
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fi
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}
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function set_dynamic_debug() {
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cat <<-EOF > /sys/kernel/debug/dynamic_debug/control
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cat <<-EOF > "$SYSFS_DEBUG_DIR/dynamic_debug/control"
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file kernel/livepatch/* +p
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func klp_try_switch_task -p
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EOF
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@ -183,7 +190,7 @@ function load_lp_nowait() {
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__load_mod "$mod" "$@"
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# Wait for livepatch in sysfs ...
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loop_until '[[ -e "/sys/kernel/livepatch/$mod" ]]' ||
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loop_until '[[ -e "$SYSFS_KLP_DIR/$mod" ]]' ||
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die "failed to load module $mod (sysfs)"
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}
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@ -196,7 +203,7 @@ function load_lp() {
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load_lp_nowait "$mod" "$@"
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# Wait until the transition finishes ...
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loop_until 'grep -q '^0$' /sys/kernel/livepatch/$mod/transition' ||
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loop_until 'grep -q '^0$' $SYSFS_KLP_DIR/$mod/transition' ||
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die "failed to complete transition"
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}
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@ -246,12 +253,12 @@ function unload_lp() {
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function disable_lp() {
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local mod="$1"
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log "% echo 0 > /sys/kernel/livepatch/$mod/enabled"
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echo 0 > /sys/kernel/livepatch/"$mod"/enabled
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log "% echo 0 > $SYSFS_KLP_DIR/$mod/enabled"
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echo 0 > "$SYSFS_KLP_DIR/$mod/enabled"
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# Wait until the transition finishes and the livepatch gets
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# removed from sysfs...
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loop_until '[[ ! -e "/sys/kernel/livepatch/$mod" ]]' ||
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loop_until '[[ ! -e "$SYSFS_KLP_DIR/$mod" ]]' ||
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die "failed to disable livepatch $mod"
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}
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@ -322,7 +329,7 @@ function check_sysfs_rights() {
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local rel_path="$1"; shift
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local expected_rights="$1"; shift
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local path="$KLP_SYSFS_DIR/$mod/$rel_path"
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local path="$SYSFS_KLP_DIR/$mod/$rel_path"
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local rights=$(/bin/stat --format '%A' "$path")
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if test "$rights" != "$expected_rights" ; then
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die "Unexpected access rights of $path: $expected_rights vs. $rights"
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@ -338,7 +345,7 @@ function check_sysfs_value() {
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local rel_path="$1"; shift
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local expected_value="$1"; shift
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local path="$KLP_SYSFS_DIR/$mod/$rel_path"
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local path="$SYSFS_KLP_DIR/$mod/$rel_path"
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local value=`cat $path`
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if test "$value" != "$expected_value" ; then
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die "Unexpected value in $path: $expected_value vs. $value"
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@ -46,7 +46,7 @@ livepatch: '$MOD_LIVEPATCH': completing patching transition
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$MOD_LIVEPATCH: post_patch_callback: vmlinux
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$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state
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livepatch: '$MOD_LIVEPATCH': patching complete
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state
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@ -94,7 +94,7 @@ livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET'
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$MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init
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$MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init
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$MOD_TARGET: ${MOD_TARGET}_init
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_LIVE] Normal state
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@ -146,7 +146,7 @@ $MOD_TARGET: ${MOD_TARGET}_exit
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$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET'
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$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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@ -195,7 +195,7 @@ $MOD_TARGET: ${MOD_TARGET}_exit
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$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET'
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$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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@ -227,7 +227,7 @@ livepatch: '$MOD_LIVEPATCH': starting patching transition
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livepatch: '$MOD_LIVEPATCH': completing patching transition
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$MOD_LIVEPATCH: post_patch_callback: vmlinux
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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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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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@ -310,7 +310,7 @@ $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full fo
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livepatch: pre-patch callback failed for object '$MOD_TARGET'
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livepatch: patch '$MOD_LIVEPATCH' failed for module '$MOD_TARGET', refusing to load module '$MOD_TARGET'
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insmod: ERROR: could not insert module test_modules/$MOD_TARGET.ko: No such device
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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@ -364,7 +364,7 @@ $MOD_TARGET: ${MOD_TARGET}_exit
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$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET'
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$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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$MOD_LIVEPATCH: pre_unpatch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state
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@ -412,7 +412,7 @@ load_lp_nowait $MOD_LIVEPATCH
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# Wait until the livepatch reports in-transition state, i.e. that it's
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# stalled on $MOD_TARGET_BUSY::busymod_work_func()
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loop_until 'grep -q '^1$' /sys/kernel/livepatch/$MOD_LIVEPATCH/transition' ||
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loop_until 'grep -q '^1$' $SYSFS_KLP_DIR/$MOD_LIVEPATCH/transition' ||
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die "failed to stall transition"
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load_mod $MOD_TARGET
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@ -438,7 +438,7 @@ $MOD_TARGET: ${MOD_TARGET}_init
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$MOD_TARGET: ${MOD_TARGET}_exit
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livepatch: reverting patch '$MOD_LIVEPATCH' on unloading module '$MOD_TARGET'
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$MOD_LIVEPATCH: post_unpatch_callback: $MOD_TARGET -> [MODULE_STATE_GOING] Going away
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': reversing transition from patching to unpatching
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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livepatch: '$MOD_LIVEPATCH': completing unpatching transition
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@ -483,14 +483,14 @@ livepatch: '$MOD_LIVEPATCH2': starting patching transition
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livepatch: '$MOD_LIVEPATCH2': completing patching transition
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$MOD_LIVEPATCH2: post_patch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH2': patching complete
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH2/enabled
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livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
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$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH2': starting unpatching transition
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livepatch: '$MOD_LIVEPATCH2': completing unpatching transition
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$MOD_LIVEPATCH2: post_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH2': unpatching complete
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
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livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
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$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH': starting unpatching transition
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@ -539,7 +539,7 @@ livepatch: '$MOD_LIVEPATCH2': starting patching transition
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livepatch: '$MOD_LIVEPATCH2': completing patching transition
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$MOD_LIVEPATCH2: post_patch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH2': patching complete
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% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled
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% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH2/enabled
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livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
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$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
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livepatch: '$MOD_LIVEPATCH2': starting unpatching transition
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@ -53,7 +53,7 @@ livepatch: '$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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% echo 0 > $SYSFS_KLP_DIR/$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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|
62
tools/testing/selftests/livepatch/test-kprobe.sh
Executable file
62
tools/testing/selftests/livepatch/test-kprobe.sh
Executable file
@ -0,0 +1,62 @@
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2024 SUSE
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# Author: Michael Vetter <mvetter@suse.com>
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. $(dirname $0)/functions.sh
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MOD_LIVEPATCH=test_klp_livepatch
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MOD_KPROBE=test_klp_kprobe
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setup_config
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# Kprobe a function and verify that we can't livepatch that same function
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# when it uses a post_handler since only one IPMODIFY maybe be registered
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# to any given function at a time.
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start_test "livepatch interaction with kprobed function with post_handler"
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echo 1 > "$SYSFS_KPROBES_DIR/enabled"
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load_mod $MOD_KPROBE has_post_handler=true
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load_failing_mod $MOD_LIVEPATCH
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unload_mod $MOD_KPROBE
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check_result "% insmod test_modules/test_klp_kprobe.ko has_post_handler=true
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% insmod test_modules/$MOD_LIVEPATCH.ko
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livepatch: enabling patch '$MOD_LIVEPATCH'
|
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livepatch: '$MOD_LIVEPATCH': initializing patching transition
|
||||
livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16)
|
||||
livepatch: failed to patch object 'vmlinux'
|
||||
livepatch: failed to enable patch '$MOD_LIVEPATCH'
|
||||
livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch
|
||||
livepatch: '$MOD_LIVEPATCH': completing unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH': unpatching complete
|
||||
insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Device or resource busy
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% rmmod test_klp_kprobe"
|
||||
|
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start_test "livepatch interaction with kprobed function without post_handler"
|
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|
||||
load_mod $MOD_KPROBE has_post_handler=false
|
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load_lp $MOD_LIVEPATCH
|
||||
|
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unload_mod $MOD_KPROBE
|
||||
disable_lp $MOD_LIVEPATCH
|
||||
unload_lp $MOD_LIVEPATCH
|
||||
|
||||
check_result "% insmod test_modules/test_klp_kprobe.ko has_post_handler=false
|
||||
% insmod test_modules/$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: '$MOD_LIVEPATCH': patching complete
|
||||
% rmmod test_klp_kprobe
|
||||
% echo 0 > /sys/kernel/livepatch/$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 $MOD_LIVEPATCH"
|
||||
|
||||
exit 0
|
@ -39,7 +39,7 @@ livepatch: '$MOD_LIVEPATCH1': initializing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': starting patching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': completing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': patching complete
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH1/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH1/enabled
|
||||
livepatch: '$MOD_LIVEPATCH1': initializing unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': starting unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': completing unpatching transition
|
||||
@ -92,14 +92,14 @@ livepatch: '$MOD_REPLACE': completing patching transition
|
||||
livepatch: '$MOD_REPLACE': patching complete
|
||||
$MOD_LIVEPATCH1: this has been live patched
|
||||
$MOD_REPLACE: this has been live patched
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_REPLACE/enabled
|
||||
livepatch: '$MOD_REPLACE': initializing unpatching transition
|
||||
livepatch: '$MOD_REPLACE': starting unpatching transition
|
||||
livepatch: '$MOD_REPLACE': completing unpatching transition
|
||||
livepatch: '$MOD_REPLACE': unpatching complete
|
||||
% rmmod $MOD_REPLACE
|
||||
$MOD_LIVEPATCH1: this has been live patched
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH1/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH1/enabled
|
||||
livepatch: '$MOD_LIVEPATCH1': initializing unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': starting unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH1': completing unpatching transition
|
||||
@ -128,7 +128,7 @@ for mod in $MOD_LIVEPATCH2 $MOD_LIVEPATCH3; do
|
||||
load_lp "$mod"
|
||||
done
|
||||
|
||||
mods=(/sys/kernel/livepatch/*)
|
||||
mods=($SYSFS_KLP_DIR/*)
|
||||
nmods=${#mods[@]}
|
||||
if [ "$nmods" -ne 3 ]; then
|
||||
die "Expecting three modules listed, found $nmods"
|
||||
@ -139,7 +139,7 @@ load_lp $MOD_REPLACE replace=1
|
||||
grep 'live patched' /proc/cmdline > /dev/kmsg
|
||||
grep 'live patched' /proc/meminfo > /dev/kmsg
|
||||
|
||||
loop_until 'mods=(/sys/kernel/livepatch/*); nmods=${#mods[@]}; [[ "$nmods" -eq 1 ]]' ||
|
||||
loop_until 'mods=($SYSFS_KLP_DIR/*); nmods=${#mods[@]}; [[ "$nmods" -eq 1 ]]' ||
|
||||
die "Expecting only one moduled listed, found $nmods"
|
||||
|
||||
# These modules were disabled by the atomic replace
|
||||
@ -188,7 +188,7 @@ $MOD_REPLACE: this has been live patched
|
||||
% rmmod $MOD_LIVEPATCH2
|
||||
% rmmod $MOD_LIVEPATCH1
|
||||
$MOD_REPLACE: this has been live patched
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_REPLACE/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_REPLACE/enabled
|
||||
livepatch: '$MOD_REPLACE': initializing unpatching transition
|
||||
livepatch: '$MOD_REPLACE': starting unpatching transition
|
||||
livepatch: '$MOD_REPLACE': completing unpatching transition
|
||||
|
@ -29,7 +29,7 @@ livepatch: '$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
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
|
||||
livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
|
||||
$MOD_LIVEPATCH: pre_unpatch_callback: vmlinux
|
||||
$MOD_LIVEPATCH: restore_console_loglevel: restoring console_loglevel
|
||||
@ -72,7 +72,7 @@ $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
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH2/enabled
|
||||
livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
|
||||
$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
|
||||
$MOD_LIVEPATCH2: restore_console_loglevel: restoring console_loglevel
|
||||
@ -127,7 +127,7 @@ livepatch: '$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
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH2/enabled
|
||||
livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
|
||||
$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
|
||||
$MOD_LIVEPATCH2: restore_console_loglevel: restoring console_loglevel
|
||||
@ -162,7 +162,7 @@ livepatch: '$MOD_LIVEPATCH2': patching complete
|
||||
% insmod test_modules/$MOD_LIVEPATCH.ko
|
||||
livepatch: Livepatch patch ($MOD_LIVEPATCH) is not compatible with the already installed livepatches.
|
||||
insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Invalid parameters
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH2/enabled
|
||||
livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition
|
||||
$MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux
|
||||
$MOD_LIVEPATCH2: restore_console_loglevel: restoring console_loglevel
|
||||
|
@ -27,9 +27,9 @@ pid_list=$(echo ${pids[@]} | tr ' ' ',')
|
||||
load_lp $MOD_SYSCALL klp_pids=$pid_list
|
||||
|
||||
# wait for all tasks to transition to patched state
|
||||
loop_until 'grep -q '^0$' /sys/kernel/test_klp_syscall/npids'
|
||||
loop_until 'grep -q '^0$' $SYSFS_KERNEL_DIR/$MOD_SYSCALL/npids'
|
||||
|
||||
pending_pids=$(cat /sys/kernel/test_klp_syscall/npids)
|
||||
pending_pids=$(cat $SYSFS_KERNEL_DIR/$MOD_SYSCALL/npids)
|
||||
log "$MOD_SYSCALL: Remaining not livepatched processes: $pending_pids"
|
||||
|
||||
for pid in ${pids[@]}; do
|
||||
@ -46,7 +46,7 @@ livepatch: '$MOD_SYSCALL': starting patching transition
|
||||
livepatch: '$MOD_SYSCALL': completing patching transition
|
||||
livepatch: '$MOD_SYSCALL': patching complete
|
||||
$MOD_SYSCALL: Remaining not livepatched processes: 0
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_SYSCALL/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_SYSCALL/enabled
|
||||
livepatch: '$MOD_SYSCALL': initializing unpatching transition
|
||||
livepatch: '$MOD_SYSCALL': starting unpatching transition
|
||||
livepatch: '$MOD_SYSCALL': completing unpatching transition
|
||||
|
@ -34,7 +34,7 @@ livepatch: '$MOD_LIVEPATCH': initializing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': starting patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': completing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': patching complete
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
|
||||
% 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
|
||||
@ -75,7 +75,7 @@ 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 > /sys/kernel/livepatch/test_klp_callbacks_demo/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/test_klp_callbacks_demo/enabled
|
||||
livepatch: 'test_klp_callbacks_demo': initializing unpatching transition
|
||||
test_klp_callbacks_demo: pre_unpatch_callback: vmlinux
|
||||
livepatch: 'test_klp_callbacks_demo': starting unpatching transition
|
||||
@ -101,7 +101,7 @@ livepatch: '$MOD_LIVEPATCH': initializing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': starting patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': completing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': patching complete
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
|
||||
% echo 0 > $SYSFS_KLP_DIR/$MOD_LIVEPATCH/enabled
|
||||
livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH': starting unpatching transition
|
||||
livepatch: '$MOD_LIVEPATCH': completing unpatching transition
|
||||
@ -124,7 +124,7 @@ livepatch: '$MOD_LIVEPATCH': initializing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': starting patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': completing patching transition
|
||||
livepatch: '$MOD_LIVEPATCH': patching complete
|
||||
% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
|
||||
% 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
|
||||
|
@ -6,11 +6,12 @@ obj-m += test_klp_atomic_replace.o \
|
||||
test_klp_callbacks_demo.o \
|
||||
test_klp_callbacks_demo2.o \
|
||||
test_klp_callbacks_mod.o \
|
||||
test_klp_kprobe.o \
|
||||
test_klp_livepatch.o \
|
||||
test_klp_shadow_vars.o \
|
||||
test_klp_state.o \
|
||||
test_klp_state2.o \
|
||||
test_klp_state3.o \
|
||||
test_klp_shadow_vars.o \
|
||||
test_klp_syscall.o
|
||||
|
||||
# Ensure that KDIR exists, otherwise skip the compilation
|
||||
|
@ -0,0 +1,38 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
// Copyright (C) 2024 Marcos Paulo de Souza <mpdesouza@suse.com>
|
||||
// Copyright (C) 2024 Michael Vetter <mvetter@suse.com>
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kprobes.h>
|
||||
|
||||
static bool has_post_handler = true;
|
||||
module_param(has_post_handler, bool, 0444);
|
||||
|
||||
static void __kprobes post_handler(struct kprobe *p, struct pt_regs *regs,
|
||||
unsigned long flags)
|
||||
{
|
||||
}
|
||||
|
||||
static struct kprobe kp = {
|
||||
.symbol_name = "cmdline_proc_show",
|
||||
};
|
||||
|
||||
static int __init kprobe_init(void)
|
||||
{
|
||||
if (has_post_handler)
|
||||
kp.post_handler = post_handler;
|
||||
|
||||
return register_kprobe(&kp);
|
||||
}
|
||||
|
||||
static void __exit kprobe_exit(void)
|
||||
{
|
||||
unregister_kprobe(&kp);
|
||||
}
|
||||
|
||||
module_init(kprobe_init)
|
||||
module_exit(kprobe_exit)
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Michael Vetter <mvetter@suse.com>");
|
||||
MODULE_DESCRIPTION("Livepatch test: kprobe function");
|
Loading…
Reference in New Issue
Block a user