1#include <stdlib.h>
2#include <stdio.h>
3#include <stdint.h>
4#include <string.h>
5#include <getopt.h>
6#include <sys/stat.h>
7
8#include <sepol/cil/cil.h>
9#include <sepol/policydb.h>
10
11static void log_handler(__attribute__((unused)) int lvl, __attribute__((unused)) const char *msg) {
12	/* be quiet */
13}
14
15int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
16	enum cil_log_level log_level = CIL_ERR;
17	struct sepol_policy_file *pf = NULL;
18	FILE *dev_null = NULL;
19	int target = SEPOL_TARGET_SELINUX;
20	int disable_dontaudit = 0;
21	int multiple_decls = 0;
22	int disable_neverallow = 0;
23	int preserve_tunables = 0;
24	int policyvers = POLICYDB_VERSION_MAX;
25	int mls = -1;
26	int attrs_expand_generated = 0;
27	struct cil_db *db = NULL;
28	sepol_policydb_t *pdb = NULL;
29
30	cil_set_log_level(log_level);
31	cil_set_log_handler(log_handler);
32
33	cil_db_init(&db);
34	cil_set_disable_dontaudit(db, disable_dontaudit);
35	cil_set_multiple_decls(db, multiple_decls);
36	cil_set_disable_neverallow(db, disable_neverallow);
37	cil_set_preserve_tunables(db, preserve_tunables);
38	cil_set_mls(db, mls);
39	cil_set_target_platform(db, target);
40	cil_set_policy_version(db, policyvers);
41	cil_set_attrs_expand_generated(db, attrs_expand_generated);
42
43	if (cil_add_file(db, "fuzz", (const char *)data, size) != SEPOL_OK)
44		goto exit;
45
46	if (cil_compile(db) != SEPOL_OK)
47		goto exit;
48
49	if (cil_build_policydb(db, &pdb) != SEPOL_OK)
50		goto exit;
51
52	if (sepol_policydb_optimize(pdb) != SEPOL_OK)
53		goto exit;
54
55	dev_null = fopen("/dev/null", "w");
56	if (dev_null == NULL)
57		goto exit;
58
59	if (sepol_policy_file_create(&pf) != 0)
60		goto exit;
61
62	sepol_policy_file_set_fp(pf, dev_null);
63
64	if (sepol_policydb_write(pdb, pf) != 0)
65		goto exit;
66exit:
67	if (dev_null != NULL)
68		fclose(dev_null);
69
70	cil_db_destroy(&db);
71	sepol_policydb_free(pdb);
72	sepol_policy_file_free(pf);
73	return 0;
74}
75