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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#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_unlocked((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,
0,
u,
NULL);
g = open_memstream_unlocked(&out, &out_size);
assert_se(g);
unit_dump(u, g, "");
manager_dump(m, g, ">>>");
return 0;
}
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