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-rw-r--r--src/fuzz/fuzz-unit-file.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/src/fuzz/fuzz-unit-file.c b/src/fuzz/fuzz-unit-file.c
new file mode 100644
index 0000000..93de501
--- /dev/null
+++ b/src/fuzz/fuzz-unit-file.c
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "conf-parser.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fuzz.h"
+#include "install.h"
+#include "load-fragment.h"
+#include "string-util.h"
+#include "unit.h"
+#include "utf8.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+ _cleanup_free_ char *out = NULL; /* out should be freed after g */
+ size_t out_size;
+ _cleanup_fclose_ FILE *f = NULL, *g = NULL;
+ _cleanup_free_ char *p = NULL;
+ UnitType t;
+ _cleanup_(manager_freep) Manager *m = NULL;
+ Unit *u;
+ const char *name;
+ long offset;
+
+ if (size == 0)
+ return 0;
+
+ f = fmemopen((char*) data, size, "re");
+ assert_se(f);
+
+ if (read_line(f, LINE_MAX, &p) < 0)
+ return 0;
+
+ t = unit_type_from_string(p);
+ if (t < 0)
+ return 0;
+
+ if (!unit_vtable[t]->load)
+ return 0;
+
+ offset = ftell(f);
+ assert_se(offset >= 0);
+
+ for (;;) {
+ _cleanup_free_ char *l = NULL;
+ const char *ll;
+
+ if (read_line(f, LONG_LINE_MAX, &l) <= 0)
+ break;
+
+ ll = startswith(l, UTF8_BYTE_ORDER_MARK) ?: l;
+ ll = ll + strspn(ll, WHITESPACE);
+
+ if (HAS_FEATURE_MEMORY_SANITIZER && startswith(ll, "ListenNetlink")) {
+ /* ListenNetlink causes a false positive in msan,
+ * let's skip this for now. */
+ log_notice("Skipping test because ListenNetlink= is present");
+ return 0;
+ }
+ }
+
+ assert_se(fseek(f, offset, SEEK_SET) == 0);
+
+ /* We don't want to fill the logs with messages about parse errors.
+ * Disable most logging if not running standalone */
+ if (!getenv("SYSTEMD_LOG_LEVEL"))
+ log_set_max_level(LOG_CRIT);
+
+ assert_se(manager_new(UNIT_FILE_SYSTEM, MANAGER_TEST_RUN_MINIMAL, &m) >= 0);
+
+ name = strjoina("a.", unit_type_to_string(t));
+ assert_se(unit_new_for_name(m, unit_vtable[t]->object_size, name, &u) >= 0);
+
+ (void) config_parse(name, name, f,
+ UNIT_VTABLE(u)->sections,
+ config_item_perf_lookup, load_fragment_gperf_lookup,
+ CONFIG_PARSE_ALLOW_INCLUDE, u);
+
+ g = open_memstream(&out, &out_size);
+ assert_se(g);
+
+ unit_dump(u, g, "");
+
+ return 0;
+}