lsm_set_self_attr_test.c

 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
18TEST(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
24TEST(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
40TEST(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
56TEST(flags_overset_lsm_set_self_attr)
57{
58	const long page_size = sysconf(_SC_PAGESIZE);
59	struct lsm_ctx *ctx = calloc(page_size, 1);
60	__u32 size = page_size;
61
62	ASSERT_NE(NULL, ctx);
63	if (attr_lsm_count()) {
64		ASSERT_LE(1, lsm_get_self_attr(LSM_ATTR_CURRENT, ctx, &size,
65					       0));
66	}
67	ASSERT_EQ(-1, lsm_set_self_attr(LSM_ATTR_CURRENT | LSM_ATTR_PREV, ctx,
68					size, 0));
69
70	free(ctx);
71}
72
73TEST_HARNESS_MAIN