1 files changed, 145 insertions, 0 deletions
diff --git a/test/units/TEST-43-PRIVATEUSER-UNPRIV.sh b/test/units/TEST-43-PRIVATEUSER-UNPRIV.sh
new file mode 100755
index 0000000..165af47
--- /dev/null
+++ b/test/units/TEST-43-PRIVATEUSER-UNPRIV.sh
@@ -0,0 +1,145 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+# shellcheck source=test/units/util.sh
+. "$(dirname "$0")"/util.sh
+
+install_extension_images
+
+if [[ "$(sysctl -ne kernel.apparmor_restrict_unprivileged_userns)" -eq 1 ]]; then
+    echo "Cannot create unprivileged user namespaces" >/skipped
+    exit 77
+fi
+
+systemd-analyze log-level debug
+
+runas testuser systemd-run --wait --user --unit=test-private-users \
+    -p PrivateUsers=yes -P echo hello
+
+runas testuser systemctl --user log-level debug
+
+runas testuser systemd-run --wait --user --unit=test-private-tmp-innerfile \
+    -p PrivateTmp=yes \
+    -P touch /tmp/innerfile.txt
+# File should not exist outside the job's tmp directory.
+test ! -e /tmp/innerfile.txt
+
+touch /tmp/outerfile.txt
+# File should not appear in unit's private tmp.
+runas testuser systemd-run --wait --user --unit=test-private-tmp-outerfile \
+    -p PrivateTmp=yes \
+    -P test ! -e /tmp/outerfile.txt
+
+# Confirm that creating a file in home works
+runas testuser systemd-run --wait --user --unit=test-unprotected-home \
+    -P touch /home/testuser/works.txt
+test -e /home/testuser/works.txt
+
+# Confirm that creating a file in home is blocked under read-only
+(! runas testuser systemd-run --wait --user --unit=test-protect-home-read-only \
+    -p ProtectHome=read-only \
+    -P bash -c '
+        test -e /home/testuser/works.txt || exit 10
+        touch /home/testuser/blocked.txt && exit 11
+    ')
+test ! -e /home/testuser/blocked.txt
+
+# Check that tmpfs hides the whole directory
+runas testuser systemd-run --wait --user --unit=test-protect-home-tmpfs \
+    -p ProtectHome=tmpfs \
+    -P test ! -e /home/testuser
+
+# Confirm that home, /root, and /run/user are inaccessible under "yes"
+# shellcheck disable=SC2016
+runas testuser systemd-run --wait --user --unit=test-protect-home-yes \
+    -p ProtectHome=yes \
+    -P bash -c '
+        test "$(stat -c %a /home)" = "0"
+        test "$(stat -c %a /root)" = "0"
+        test "$(stat -c %a /run/user)" = "0"
+    '
+
+# Confirm we cannot change groups because we only have one mapping in the user
+# namespace (no CAP_SETGID in the parent namespace to write the additional
+# mapping of the user supplied group and thus cannot change groups to an
+# unmapped group ID)
+(! runas testuser systemd-run --wait --user --unit=test-group-fail \
+    -p PrivateUsers=yes -p Group=daemon \
+    -P true)
+
+# Check that with a new user namespace we can bind mount
+# files and use a different root directory
+runas testuser systemd-run --wait --user --unit=test-bind-mount \
+    -p BindPaths=/dev/null:/etc/os-release \
+    test ! -s /etc/os-release
+
+runas testuser systemd-run --wait --user --unit=test-read-write \
+    -p ReadOnlyPaths=/ \
+    -p ReadWritePaths="/var /run /tmp" \
+    -p NoExecPaths=/ -p ExecPaths=/usr \
+    test ! -w /etc/os-release
+
+runas testuser systemd-run --wait --user --unit=test-caps \
+    -p PrivateUsers=yes -p AmbientCapabilities=CAP_SYS_ADMIN \
+    -p CapabilityBoundingSet=CAP_SYS_ADMIN \
+    test -s /etc/os-release
+
+runas testuser systemd-run --wait --user --unit=test-devices \
+    -p PrivateDevices=yes -p PrivateIPC=yes \
+    sh -c "ls -1 /dev/ | wc -l | grep -q -F 18"
+
+# Same check as test/test-execute/exec-privatenetwork-yes.service
+runas testuser systemd-run --wait --user --unit=test-network \
+    -p PrivateNetwork=yes \
+    /bin/sh -x -c '! ip link | grep -E "^[0-9]+: " | grep -Ev ": (lo|(erspan|gre|gretap|ip_vti|ip6_vti|ip6gre|ip6tnl|sit|tunl)0@.*):"'
+
+(! runas testuser systemd-run --wait --user --unit=test-hostname \
+    -p ProtectHostname=yes \
+    hostnamectl hostname foo)
+
+(! runas testuser systemd-run --wait --user --unit=test-clock \
+    -p ProtectClock=yes \
+    timedatectl set-time "2012-10-30 18:17:16")
+
+(! runas testuser systemd-run --wait --user --unit=test-kernel-tunable \
+    -p ProtectKernelTunables=yes \
+    sh -c "echo 0 >/proc/sys/user/max_user_namespaces")
+
+(! runas testuser systemd-run --wait --user --unit=test-kernel-mod \
+    -p ProtectKernelModules=yes \
+    sh -c "modprobe -r overlay && modprobe overlay")
+
+if sysctl kernel.dmesg_restrict=0; then
+    (! runas testuser systemd-run --wait --user --unit=test-kernel-log \
+        -p ProtectKernelLogs=yes -p LogNamespace=yes \
+        dmesg)
+fi
+
+unsquashfs -no-xattrs -d /tmp/img /usr/share/minimal_0.raw
+runas testuser systemd-run --wait --user --unit=test-root-dir \
+    -p RootDirectory=/tmp/img \
+    grep MARKER=1 /etc/os-release
+
+mkdir /tmp/img_bind
+mount --bind /tmp/img /tmp/img_bind
+runas testuser systemd-run --wait --user --unit=test-root-dir-bind \
+    -p RootDirectory=/tmp/img_bind -p MountFlags=private \
+    grep MARKER=1 /etc/os-release
+umount /tmp/img_bind
+
+# Unprivileged overlayfs was added to Linux 5.11, so try to detect it first
+mkdir -p /tmp/a /tmp/b /tmp/c
+if unshare --mount --user --map-root-user mount -t overlay overlay /tmp/c -o lowerdir=/tmp/a:/tmp/b; then
+    unsquashfs -no-xattrs -d /tmp/app2 /tmp/app1.raw
+    runas testuser systemd-run --wait --user --unit=test-extension-dir \
+        -p ExtensionDirectories=/tmp/app2 \
+        -p TemporaryFileSystem=/run -p RootDirectory=/tmp/img \
+        -p MountAPIVFS=yes \
+        grep PORTABLE_PREFIXES=app1 /usr/lib/extension-release.d/extension-release.app2
+fi
+
+systemd-analyze log-level info
+
+touch /testok