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113 lines
5.4 KiB
113 lines
5.4 KiB
From a8924006c47a680f038d9ff66fd3896ffbc37bc1 Mon Sep 17 00:00:00 2001
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From: Frantisek Sumsal <frantisek@sumsal.cz>
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Date: Thu, 25 Apr 2024 19:50:10 +0200
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Subject: [PATCH] test: check coredump handling in containers & namespaces
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This is partially based on upstream's 097e28736a, which tests coredump
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forwarding (that we don't have in RHEL 9). It also provides basic
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coverage for RHEL-29430 (generating stack traces for processes in
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containers without coredump fowarding).
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rhel-only
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Related: RHEL-34061
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---
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test/test-functions | 2 +-
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test/units/testsuite-74.coredump.sh | 64 ++++++++++++++++++++++++++++-
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2 files changed, 64 insertions(+), 2 deletions(-)
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diff --git a/test/test-functions b/test/test-functions
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index 1608644cbb..947f8589c5 100644
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--- a/test/test-functions
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+++ b/test/test-functions
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@@ -2619,7 +2619,7 @@ inst_binary() {
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# ls, stat - pulls in nss_systemd with certain options (like ls -l) when
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# nsswitch.conf uses [SUCCESS=merge] (like on Arch Linux)
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# tar - called by machinectl in TEST-25
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- if get_bool "$IS_BUILT_WITH_ASAN" && [[ "$bin" =~ /(chown|getent|login|ls|stat|su|tar|useradd|userdel)$ ]]; then
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+ if get_bool "$IS_BUILT_WITH_ASAN" && [[ "$bin" =~ /(chown|getent|login|id|ls|stat|su|tar|useradd|userdel)$ ]]; then
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wrap_binary=1
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fi
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diff --git a/test/units/testsuite-74.coredump.sh b/test/units/testsuite-74.coredump.sh
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index d30fd73717..1093cad8a9 100755
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--- a/test/units/testsuite-74.coredump.sh
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+++ b/test/units/testsuite-74.coredump.sh
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@@ -74,6 +74,68 @@ 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 $CORE_TEST_BIN | wc -l) -lt 4 ]]; do sleep 1; done"
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+# RHEL9: following part is taken out of 097e28736aed9280dfac0f8e8096deca71bac813 but slightly tweaked, since
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+# in RHEL9 we don't have the support for coredump forwarding
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+CONTAINER="testsuite-74-container"
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+TESTUSER_UID="$(id -u testuser)"
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+TESTUSER_GID="$(id -g testuser)"
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+
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+mkdir -p "/var/lib/machines/$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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+
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+machinectl start "$CONTAINER"
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+timeout 60 bash -xec "until systemd-run -M '$CONTAINER' -q --wait --pipe true; do sleep .5; done"
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+machinectl copy-to "$CONTAINER" "$MAKE_DUMP_SCRIPT"
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+
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+run_namespaced_coredump_tests() {
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+ local TS
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+
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+ # Make a couple of coredumps in a full-fleged container
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+ TS="$(date +"%s.%N")"
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+ [[ "$(coredumpctl list --since="@$TS" -q --no-legend /usr/bin/sleep | wc -l)" -eq 0 ]]
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+ [[ "$(coredumpctl list --since="@$TS" -q --no-legend /usr/bin/sleep _UID="$TESTUSER_UID" | wc -l)" -eq 0 ]]
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+ systemd-run -M "testuser@$CONTAINER" --user -q --wait --pipe "$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 [[ \$(coredumpctl list --since=@$TS -q --no-legend /usr/bin/sleep | wc -l) -ne 2 ]]; do sleep 1; done"
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+ coredumpctl list
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+ [[ "$(coredumpctl list --since="@$TS" -q --no-legend /usr/bin/sleep _UID="$TESTUSER_UID" _GID="$TESTUSER_GID" | wc -l)" -eq 1 ]]
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+
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+ # Simplified version of the above - not a full container, just a mount & pid namespace
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+ TS="$(date +"%s.%N")"
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+ unshare --mount --pid --fork --mount-proc /bin/bash -xec "$MAKE_DUMP_SCRIPT /usr/bin/sleep SIGABRT"
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+ timeout 30 bash -c "while [[ \$(coredumpctl list --since=@$TS -q --no-legend /usr/bin/sleep | wc -l) -ne 1 ]]; do sleep 1; done"
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+ TS="$(date +"%s.%N")"
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+ unshare --setuid="$TESTUSER_UID" --setgid="$TESTUSER_GID" --mount --pid --fork --mount-proc /bin/bash -xec "$MAKE_DUMP_SCRIPT /usr/bin/sleep SIGABRT"
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+ timeout 30 bash -c "while [[ \$(coredumpctl list --since=@$TS -q --no-legend /usr/bin/sleep _UID=$TESTUSER_UID _GID=$TESTUSER_GID | wc -l) -ne 1 ]]; do sleep 1; done"
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+}
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+
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+# First, run the tests with default systemd-coredumpd settings
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+run_namespaced_coredump_tests
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+
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+# And now with SYSTEMD_COREDUMP_ALLOW_NAMESPACE_CHANGE=1 (RHEL-only)
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+cat >/tmp/coredump-handler.sh <<EOF
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+#!/bin/bash
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+export SYSTEMD_COREDUMP_ALLOW_NAMESPACE_CHANGE=1
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+exec /usr/lib/systemd/systemd-coredump "\$@"
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+EOF
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+chmod +x /tmp/coredump-handler.sh
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+sysctl -w kernel.core_pattern="|/tmp/coredump-handler.sh %P %u %g %s %t %c %h"
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+run_namespaced_coredump_tests
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+
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+# Restore the original coredump handler
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+sysctl -p /usr/lib/sysctl.d/50-coredump.conf
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+sysctl kernel.core_pattern
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+
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coredumpctl
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SYSTEMD_LOG_LEVEL=debug coredumpctl
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coredumpctl --help
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@@ -89,7 +151,7 @@ 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)/system.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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