test: add test case for issue user journal corruption

For issue systemd#24150 and systemd#31222.

test/TEST-04-JOURNAL/test.sh

@@ -27,6 +27,10 @@ test_append_files() {
         mkdir -p "$dropin_dir"
         printf '[Service]\nStandardOutput=journal+console\nStandardError=journal+console' >"$dropin_dir/99-stdout.conf"
     fi
+
+    image_install sudo
+    inst /etc/sudoers
+    inst_recursive /usr/libexec/sudo/
 }
 
 do_test "$@"

test/test-functions

@@ -2099,7 +2099,7 @@ install_testuser() {
     # create unprivileged user for user manager tests
     mkdir -p "${initdir:?}/etc/sysusers.d"
     cat >"$initdir/etc/sysusers.d/testuser.conf" <<EOF
-u testuser    4711     "Test User" /home/testuser
+u testuser    4711     "Test User" /home/testuser /bin/bash
 EOF
 
     mkdir -p "$initdir/home/testuser"

test/units/testsuite-04.user-corrupt.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+mkdir -p /etc/sudoers.d/
+echo "testuser ALL=(ALL) NOPASSWD: ALL" >/etc/sudoers.d/testuser
+
+REPRO_SCRIPT="$(mktemp)"
+
+cat >"$REPRO_SCRIPT" <<\EOF
+#!/bin/bash
+set -eux
+set -o pipefail
+
+journalctl --rotate --vacuum-files=1
+# Nuke all archived journals, so we start with a clean slate
+rm -f /var/log/journal/$(</etc/machine-id)/system@*.journal
+rm -f /var/log/journal/$(</etc/machine-id)/user-*@*.journal
+journalctl --header | grep path
+
+for i in {0..10}; do
+    journalctl --rotate
+    journalctl --sync
+    SYSTEMD_LOG_LEVEL=debug journalctl -n1 -q
+    (! journalctl -n0 -q |& grep corrupted)
+done
+EOF
+chmod +x "$REPRO_SCRIPT"
+
+systemd-run --wait --pipe --user -M testuser@ -- sudo "$REPRO_SCRIPT"