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259 lines
10 KiB
Bash
Executable File
259 lines
10 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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set -eux
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set -o pipefail
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# shellcheck source=test/units/util.sh
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. "$(dirname "$0")"/util.sh
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# Make sure the binary name fits into 15 characters
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CORE_TEST_BIN="/tmp/test-dump"
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CORE_STACKTRACE_TEST_BIN="/tmp/test-stacktrace-dump"
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MAKE_STACKTRACE_DUMP="/tmp/make-stacktrace-dump"
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CORE_TEST_UNPRIV_BIN="/tmp/test-usr-dump"
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MAKE_DUMP_SCRIPT="/tmp/make-dump"
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# Unset $PAGER so we don't have to use --no-pager everywhere
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export PAGER=
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at_exit() {
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rm -fv -- "$CORE_TEST_BIN" "$CORE_TEST_UNPRIV_BIN" "$MAKE_DUMP_SCRIPT" "$MAKE_STACKTRACE_DUMP"
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}
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trap at_exit EXIT
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if systemd-detect-virt -cq; then
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echo "Running in a container, skipping the systemd-coredump test..."
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exit 0
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fi
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# To make all coredump entries stored in system.journal.
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journalctl --rotate
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# Check that we're the ones to receive coredumps
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sysctl kernel.core_pattern | grep systemd-coredump
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# Prepare "fake" binaries for coredumps, so we can properly exercise
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# the matching stuff too
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cp -vf /bin/sleep "${CORE_TEST_BIN:?}"
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cp -vf /bin/sleep "${CORE_TEST_UNPRIV_BIN:?}"
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# Simple script that spawns given "fake" binary and then kills it with
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# given signal
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cat >"${MAKE_DUMP_SCRIPT:?}" <<\EOF
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#!/bin/bash -ex
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bin="${1:?}"
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sig="${2:?}"
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ulimit -c unlimited
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"$bin" infinity &
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pid=$!
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# Sync with the "fake" binary, so we kill it once it's fully forked off,
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# otherwise we might kill it during fork and kernel would then report
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# "wrong" binary name (i.e. $MAKE_DUMP_SCRIPT instead of $CORE_TEST_BIN).
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# In this case, wait until the "fake" binary (sleep in this case) enters
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# the "interruptible sleep" state, at which point it should be ready
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# to be sacrificed.
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for _ in {0..9}; do
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read -ra self_stat <"/proc/$pid/stat"
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[[ "${self_stat[2]}" == S ]] && break
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sleep .5
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done
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kill -s "$sig" "$pid"
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# This should always fail
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! wait "$pid"
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EOF
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chmod +x "$MAKE_DUMP_SCRIPT"
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# Privileged stuff
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[[ "$(id -u)" -eq 0 ]]
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# Trigger a couple of coredumps
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"$MAKE_DUMP_SCRIPT" "$CORE_TEST_BIN" "SIGTRAP"
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"$MAKE_DUMP_SCRIPT" "$CORE_TEST_BIN" "SIGABRT"
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# In the tests we store the coredumps in journals, so let's generate a couple
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# with Storage=external as well
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mkdir -p /run/systemd/coredump.conf.d/
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printf '[Coredump]\nStorage=external' >/run/systemd/coredump.conf.d/99-external.conf
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"$MAKE_DUMP_SCRIPT" "$CORE_TEST_BIN" "SIGTRAP"
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"$MAKE_DUMP_SCRIPT" "$CORE_TEST_BIN" "SIGABRT"
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rm -fv /run/systemd/coredump.conf.d/99-external.conf
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# Wait a bit for the coredumps to get processed
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timeout 30 bash -c "while [[ \$(coredumpctl list -q --no-legend $CORE_TEST_BIN | wc -l) -lt 4 ]]; do sleep 1; done"
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if cgroupfs_supports_user_xattrs; then
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# Make sure we can forward crashes back to containers
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CONTAINER="TEST-74-AUX-UTILS-container"
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mkdir -p "/var/lib/machines/$CONTAINER"
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mkdir -p "/run/systemd/system/systemd-nspawn@$CONTAINER.service.d"
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# Bind-mounting /etc into the container kinda defeats the purpose of --volatile=,
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# but we need the ASan-related overrides scattered across /etc
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cat > "/run/systemd/system/systemd-nspawn@$CONTAINER.service.d/override.conf" <<EOF
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[Service]
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ExecStart=
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ExecStart=systemd-nspawn --quiet --link-journal=try-guest --keep-unit --machine=%i --boot \
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--volatile=yes --directory=/ --bind-ro=/etc --inaccessible=/etc/machine-id
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EOF
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systemctl daemon-reload
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[[ "$(systemd-detect-virt)" == "qemu" ]] && TIMEOUT=120 || TIMEOUT=60
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machinectl start "$CONTAINER"
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timeout "$TIMEOUT" bash -xec "until systemd-run -M '$CONTAINER' -q --wait --pipe true; do sleep .5; done"
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[[ "$(systemd-run -M "$CONTAINER" -q --wait --pipe coredumpctl list -q --no-legend /usr/bin/sleep | wc -l)" -eq 0 ]]
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machinectl copy-to "$CONTAINER" "$MAKE_DUMP_SCRIPT"
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systemd-run -M "$CONTAINER" -q --wait --pipe "$MAKE_DUMP_SCRIPT" "/usr/bin/sleep" "SIGABRT"
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systemd-run -M "$CONTAINER" -q --wait --pipe "$MAKE_DUMP_SCRIPT" "/usr/bin/sleep" "SIGTRAP"
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# Wait a bit for the coredumps to get processed
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timeout 30 bash -c "while [[ \$(systemd-run -M $CONTAINER -q --wait --pipe coredumpctl list -q --no-legend /usr/bin/sleep | wc -l) -lt 2 ]]; do sleep 1; done"
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machinectl stop "$CONTAINER"
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rm -rf "/var/lib/machines/$CONTAINER"
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unset CONTAINER
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fi
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coredumpctl
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SYSTEMD_LOG_LEVEL=debug coredumpctl
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coredumpctl --help
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coredumpctl --version
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coredumpctl --no-pager --no-legend
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coredumpctl --all
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coredumpctl -1
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coredumpctl -n 1
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coredumpctl --reverse
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coredumpctl -F COREDUMP_EXE
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coredumpctl --json=short | jq
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coredumpctl --json=pretty | jq
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coredumpctl --json=off
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coredumpctl --root=/
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coredumpctl --directory=/var/log/journal
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coredumpctl --file="/var/log/journal/$(</etc/machine-id)"/*.journal
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coredumpctl --since=@0
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coredumpctl --since=yesterday --until=tomorrow
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# We should have a couple of externally stored coredumps
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coredumpctl --field=COREDUMP_FILENAME | tee /tmp/coredumpctl.out
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grep "/var/lib/systemd/coredump/core" /tmp/coredumpctl.out
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rm -f /tmp/coredumpctl.out
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coredumpctl info
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coredumpctl info "$CORE_TEST_BIN"
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coredumpctl info /foo /bar/ /baz "$CORE_TEST_BIN"
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coredumpctl info "${CORE_TEST_BIN##*/}"
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coredumpctl info foo bar baz "${CORE_TEST_BIN##*/}"
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coredumpctl info COREDUMP_EXE="$CORE_TEST_BIN"
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coredumpctl info COREDUMP_EXE=aaaaa COREDUMP_EXE= COREDUMP_EXE="$CORE_TEST_BIN"
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coredumpctl debug --debugger=/bin/true "$CORE_TEST_BIN"
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SYSTEMD_DEBUGGER=/bin/true coredumpctl debug "$CORE_TEST_BIN"
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coredumpctl debug --debugger=/bin/true --debugger-arguments="-this --does --not 'do anything' -a -t --all" "${CORE_TEST_BIN##*/}"
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coredumpctl dump "$CORE_TEST_BIN" >/tmp/core.redirected
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test -s /tmp/core.redirected
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coredumpctl dump -o /tmp/core.output "${CORE_TEST_BIN##*/}"
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test -s /tmp/core.output
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rm -f /tmp/core.{output,redirected}
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# Unprivileged stuff
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# Related issue: https://github.com/systemd/systemd/issues/26912
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UNPRIV_CMD=(systemd-run --user --wait --pipe -M "testuser@.host" --)
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# Trigger a couple of coredumps as an unprivileged user
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"${UNPRIV_CMD[@]}" "$MAKE_DUMP_SCRIPT" "$CORE_TEST_UNPRIV_BIN" "SIGTRAP"
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"${UNPRIV_CMD[@]}" "$MAKE_DUMP_SCRIPT" "$CORE_TEST_UNPRIV_BIN" "SIGABRT"
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# In the tests we store the coredumps in journals, so let's generate a couple
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# with Storage=external as well
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mkdir -p /run/systemd/coredump.conf.d/
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printf '[Coredump]\nStorage=external' >/run/systemd/coredump.conf.d/99-external.conf
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"${UNPRIV_CMD[@]}" "$MAKE_DUMP_SCRIPT" "$CORE_TEST_UNPRIV_BIN" "SIGTRAP"
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"${UNPRIV_CMD[@]}" "$MAKE_DUMP_SCRIPT" "$CORE_TEST_UNPRIV_BIN" "SIGABRT"
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rm -fv /run/systemd/coredump.conf.d/99-external.conf
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# Wait a bit for the coredumps to get processed
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timeout 30 bash -c "while [[ \$(coredumpctl list -q --no-legend $CORE_TEST_UNPRIV_BIN | wc -l) -lt 4 ]]; do sleep 1; done"
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# root should see coredumps from both binaries
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coredumpctl info "$CORE_TEST_UNPRIV_BIN"
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coredumpctl info "${CORE_TEST_UNPRIV_BIN##*/}"
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# The test user should see only their own coredumps
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"${UNPRIV_CMD[@]}" coredumpctl
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"${UNPRIV_CMD[@]}" coredumpctl info "$CORE_TEST_UNPRIV_BIN"
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"${UNPRIV_CMD[@]}" coredumpctl info "${CORE_TEST_UNPRIV_BIN##*/}"
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(! "${UNPRIV_CMD[@]}" coredumpctl info --all "$CORE_TEST_BIN")
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(! "${UNPRIV_CMD[@]}" coredumpctl info --all "${CORE_TEST_BIN##*/}")
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# We should have a couple of externally stored coredumps
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"${UNPRIV_CMD[@]}" coredumpctl --field=COREDUMP_FILENAME | tee /tmp/coredumpctl.out
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grep "/var/lib/systemd/coredump/core" /tmp/coredumpctl.out
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rm -f /tmp/coredumpctl.out
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"${UNPRIV_CMD[@]}" coredumpctl debug --debugger=/bin/true "$CORE_TEST_UNPRIV_BIN"
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"${UNPRIV_CMD[@]}" coredumpctl debug --debugger=/bin/true --debugger-arguments="-this --does --not 'do anything' -a -t --all" "${CORE_TEST_UNPRIV_BIN##*/}"
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"${UNPRIV_CMD[@]}" coredumpctl dump "$CORE_TEST_UNPRIV_BIN" >/tmp/core.redirected
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test -s /tmp/core.redirected
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"${UNPRIV_CMD[@]}" coredumpctl dump -o /tmp/core.output "${CORE_TEST_UNPRIV_BIN##*/}"
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test -s /tmp/core.output
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rm -f /tmp/core.{output,redirected}
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(! "${UNPRIV_CMD[@]}" coredumpctl dump "$CORE_TEST_BIN" >/dev/null)
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# --backtrace mode
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# Pass one of the existing journal coredump records to systemd-coredump and
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# use our PID as the source to make matching the coredump later easier
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# systemd-coredump args: PID UID GID SIGNUM TIMESTAMP CORE_SOFT_RLIMIT HOSTNAME
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journalctl -b -n 1 --output=export --output-fields=MESSAGE,COREDUMP COREDUMP_EXE="/usr/bin/test-dump" |
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/usr/lib/systemd/systemd-coredump --backtrace $$ 0 0 6 1679509994 12345 mymachine
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# Wait a bit for the coredump to get processed
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timeout 30 bash -c "while [[ \$(coredumpctl list -q --no-legend $$ | wc -l) -eq 0 ]]; do sleep 1; done"
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coredumpctl info "$$"
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coredumpctl info COREDUMP_HOSTNAME="mymachine"
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# This used to cause a stack overflow
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systemd-run -t --property CoredumpFilter=all ls /tmp
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systemd-run -t --property CoredumpFilter=default ls /tmp
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(! coredumpctl --hello-world)
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(! coredumpctl -n 0)
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(! coredumpctl -n -1)
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(! coredumpctl --file=/dev/null)
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(! coredumpctl --since=0)
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(! coredumpctl --until='')
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(! coredumpctl --since=today --until=yesterday)
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(! coredumpctl --directory=/ --root=/)
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(! coredumpctl --json=foo)
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(! coredumpctl -F foo -F bar)
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(! coredumpctl list 0)
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(! coredumpctl list -- -1)
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(! coredumpctl list '')
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(! coredumpctl info /../.~=)
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(! coredumpctl info '')
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(! coredumpctl dump --output=/dev/full "$CORE_TEST_BIN")
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(! coredumpctl dump --output=/dev/null --output=/dev/null "$CORE_TEST_BIN")
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(! coredumpctl debug --debugger=/bin/false)
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(! coredumpctl debug --debugger=/bin/true --debugger-arguments='"')
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# Test for EnterNamespace= feature
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if pkgconf --atleast-version 0.192 libdw ; then
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# dwfl_set_sysroot() is supported only in libdw-0.192 or newer.
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cat >"$MAKE_STACKTRACE_DUMP" <<END
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#!/bin/bash
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mount -t tmpfs tmpfs /tmp
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gcc -xc -O0 -g -o $CORE_STACKTRACE_TEST_BIN - <<EOF
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void baz(void) { int *x = 0; *x = 42; }
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void bar(void) { baz(); }
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void foo(void) { bar(); }
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int main(void) { foo(); return 0;}
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EOF
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$CORE_STACKTRACE_TEST_BIN
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END
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chmod +x "$MAKE_STACKTRACE_DUMP"
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mkdir -p /run/systemd/coredump.conf.d/
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printf '[Coredump]\nEnterNamespace=no' >/run/systemd/coredump.conf.d/99-enter-namespace.conf
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unshare --pid --fork --mount-proc --mount --uts --ipc --net /bin/bash -c "$MAKE_STACKTRACE_DUMP" || :
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timeout 30 bash -c "until coredumpctl -1 info $CORE_STACKTRACE_TEST_BIN | grep -zvqE 'baz.*bar.*foo'; do sleep .2; done"
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printf '[Coredump]\nEnterNamespace=yes' >/run/systemd/coredump.conf.d/99-enter-namespace.conf
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unshare --pid --fork --mount-proc --mount --uts --ipc --net /bin/bash -c "$MAKE_STACKTRACE_DUMP" || :
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timeout 30 bash -c "until coredumpctl -1 info $CORE_STACKTRACE_TEST_BIN | grep -zqE 'baz.*bar.*foo'; do sleep .2; done"
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else
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echo "libdw doesn't not support setting sysroot, skipping EnterNamespace= test"
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fi
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