1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Linux Security Module infrastructure tests
4 * Tests for the lsm_set_self_attr system call
5 *
6 * Copyright © 2022 Casey Schaufler <casey@schaufler-ca.com>
7 */
8
9 #define _GNU_SOURCE
10 #include <linux/lsm.h>
11 #include <string.h>
12 #include <stdio.h>
13 #include <unistd.h>
14 #include <sys/types.h>
15 #include "../kselftest_harness.h"
16 #include "common.h"
17
TEST(ctx_null_lsm_set_self_attr)18 TEST(ctx_null_lsm_set_self_attr)
19 {
20 ASSERT_EQ(-1, lsm_set_self_attr(LSM_ATTR_CURRENT, NULL,
21 sizeof(struct lsm_ctx), 0));
22 }
23
TEST(size_too_small_lsm_set_self_attr)24 TEST(size_too_small_lsm_set_self_attr)
25 {
26 const long page_size = sysconf(_SC_PAGESIZE);
27 struct lsm_ctx *ctx = calloc(page_size, 1);
28 __u32 size = page_size;
29
30 ASSERT_NE(NULL, ctx);
31 if (attr_lsm_count()) {
32 ASSERT_LE(1, lsm_get_self_attr(LSM_ATTR_CURRENT, ctx, &size,
33 0));
34 }
35 ASSERT_EQ(-1, lsm_set_self_attr(LSM_ATTR_CURRENT, ctx, 1, 0));
36
37 free(ctx);
38 }
39
TEST(flags_zero_lsm_set_self_attr)40 TEST(flags_zero_lsm_set_self_attr)
41 {
42 const long page_size = sysconf(_SC_PAGESIZE);
43 struct lsm_ctx *ctx = calloc(page_size, 1);
44 __u32 size = page_size;
45
46 ASSERT_NE(NULL, ctx);
47 if (attr_lsm_count()) {
48 ASSERT_LE(1, lsm_get_self_attr(LSM_ATTR_CURRENT, ctx, &size,
49 0));
50 }
51 ASSERT_EQ(-1, lsm_set_self_attr(LSM_ATTR_CURRENT, ctx, size, 1));
52
53 free(ctx);
54 }
55
TEST(flags_overset_lsm_set_self_attr)56 TEST(flags_overset_lsm_set_self_attr)
57 {
58 const long page_size = sysconf(_SC_PAGESIZE);
59 char *ctx = calloc(page_size, 1);
60 __u32 size = page_size;
61 struct lsm_ctx *tctx = (struct lsm_ctx *)ctx;
62
63 ASSERT_NE(NULL, ctx);
64 if (attr_lsm_count()) {
65 ASSERT_LE(1, lsm_get_self_attr(LSM_ATTR_CURRENT, tctx, &size,
66 0));
67 }
68 ASSERT_EQ(-1, lsm_set_self_attr(LSM_ATTR_CURRENT | LSM_ATTR_PREV, tctx,
69 size, 0));
70
71 free(ctx);
72 }
73
74 TEST_HARNESS_MAIN
75