test: append to corrupted journals

Introduce a manual test tool that creates a journal, corrupts it by
flipping bits at given offsets, and then attempts to write to the journal.
In ideal case we should handle this gracefully without any crash or
memory corruption.

1 files changed, 46 insertions, 0 deletions

diff --git a/test/units/testsuite-04.journal-append.sh b/test/units/testsuite-04.journal-append.sh
new file mode 100755
index 0000000000..35f9433b83
--- /dev/null
+++ b/test/units/testsuite-04.journal-append.sh
@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+# test-journal-append corrupts the journal file by flipping a bit at a given offset and
+# following it by a write to check if we handle appending messages to corrupted journals
+# gracefully
+
+TEST_JOURNAL_APPEND=/usr/lib/systemd/tests/unit-tests/manual/test-journal-append
+
+[[ -x "$TEST_JOURNAL_APPEND" ]]
+
+# Corrupt the first ~1024 bytes, this should be pretty quick
+"$TEST_JOURNAL_APPEND" --sequential --start-offset=0 --iterations=350 --iteration-step=3
+
+# Skip most of the test when running without acceleration, as it's excruciatingly slow
+# (this shouldn't be an issue, as it should run in nspawn as well)
+if ! [[ "$(systemd-detect-virt -v)" == "qemu" ]]; then
+    # Corrupt the beginning of every 1K block between 1K - 32K
+    for ((i = 1024; i <= (32 * 1024); i += 1024)); do
+        "$TEST_JOURNAL_APPEND" --sequential --start-offset="$i" --iterations=5 --iteration-step=13
+    done
+
+    # Corrupt the beginning of every 16K block between 32K - 128K
+    for ((i = (32 * 1024); i <= (256 * 1024); i += (16 * 1024))); do
+        "$TEST_JOURNAL_APPEND" --sequential --start-offset="$i" --iterations=5 --iteration-step=13
+    done
+
+    # Corrupt the beginning of every 128K block between 128K - 1M
+    for ((i = (128 * 1024); i <= (1 * 1024 * 1024); i += (128 * 1024))); do
+        "$TEST_JOURNAL_APPEND" --sequential --start-offset="$i" --iterations=5 --iteration-step=13
+    done
+
+    # And finally the beginning of every 1M block between 1M and 8M
+    for ((i = (1 * 1024 * 1024); i < (8 * 1024 * 1024); i += (1 * 1024 * 1024))); do
+        "$TEST_JOURNAL_APPEND" --sequential --start-offset="$i" --iterations=5 --iteration-step=13
+    done
+
+    if [[ "$(nproc)" -ge 2 ]]; then
+        # Try to corrupt random bytes throughout the journal
+        "$TEST_JOURNAL_APPEND" --iterations=25
+    fi
+else
+    "$TEST_JOURNAL_APPEND" --iterations=10
+fi