1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Linux Security Module infrastructure tests
  4 * Tests for the lsm_list_modules 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(size_null_lsm_list_modules)
 19{
 20	const long page_size = sysconf(_SC_PAGESIZE);
 21	__u64 *syscall_lsms = calloc(page_size, 1);
 22
 23	ASSERT_NE(NULL, syscall_lsms);
 24	errno = 0;
 25	ASSERT_EQ(-1, lsm_list_modules(syscall_lsms, NULL, 0));
 26	ASSERT_EQ(EFAULT, errno);
 27
 28	free(syscall_lsms);
 29}
 30
 31TEST(ids_null_lsm_list_modules)
 32{
 33	const long page_size = sysconf(_SC_PAGESIZE);
 34	size_t size = page_size;
 35
 36	errno = 0;
 37	ASSERT_EQ(-1, lsm_list_modules(NULL, &size, 0));
 38	ASSERT_EQ(EFAULT, errno);
 39	ASSERT_NE(1, size);
 40}
 41
 42TEST(size_too_small_lsm_list_modules)
 43{
 44	const long page_size = sysconf(_SC_PAGESIZE);
 45	__u64 *syscall_lsms = calloc(page_size, 1);
 46	size_t size = 1;
 47
 48	ASSERT_NE(NULL, syscall_lsms);
 49	errno = 0;
 50	ASSERT_EQ(-1, lsm_list_modules(syscall_lsms, &size, 0));
 51	ASSERT_EQ(E2BIG, errno);
 52	ASSERT_NE(1, size);
 53
 54	free(syscall_lsms);
 55}
 56
 57TEST(flags_set_lsm_list_modules)
 58{
 59	const long page_size = sysconf(_SC_PAGESIZE);
 60	__u64 *syscall_lsms = calloc(page_size, 1);
 61	size_t size = page_size;
 62
 63	ASSERT_NE(NULL, syscall_lsms);
 64	errno = 0;
 65	ASSERT_EQ(-1, lsm_list_modules(syscall_lsms, &size, 7));
 66	ASSERT_EQ(EINVAL, errno);
 67	ASSERT_EQ(page_size, size);
 68
 69	free(syscall_lsms);
 70}
 71
 72TEST(correct_lsm_list_modules)
 73{
 74	const long page_size = sysconf(_SC_PAGESIZE);
 75	size_t size = page_size;
 76	__u64 *syscall_lsms = calloc(page_size, 1);
 77	char *sysfs_lsms = calloc(page_size, 1);
 78	char *name;
 79	char *cp;
 80	int count;
 81	int i;
 82
 83	ASSERT_NE(NULL, sysfs_lsms);
 84	ASSERT_NE(NULL, syscall_lsms);
 85	ASSERT_EQ(0, read_sysfs_lsms(sysfs_lsms, page_size));
 86
 87	count = lsm_list_modules(syscall_lsms, &size, 0);
 88	ASSERT_LE(1, count);
 89	cp = sysfs_lsms;
 90	for (i = 0; i < count; i++) {
 91		switch (syscall_lsms[i]) {
 92		case LSM_ID_CAPABILITY:
 93			name = "capability";
 94			break;
 95		case LSM_ID_SELINUX:
 96			name = "selinux";
 97			break;
 98		case LSM_ID_SMACK:
 99			name = "smack";
100			break;
101		case LSM_ID_TOMOYO:
102			name = "tomoyo";
103			break;
104		case LSM_ID_APPARMOR:
105			name = "apparmor";
106			break;
107		case LSM_ID_YAMA:
108			name = "yama";
109			break;
110		case LSM_ID_LOADPIN:
111			name = "loadpin";
112			break;
113		case LSM_ID_SAFESETID:
114			name = "safesetid";
115			break;
116		case LSM_ID_LOCKDOWN:
117			name = "lockdown";
118			break;
119		case LSM_ID_BPF:
120			name = "bpf";
121			break;
122		case LSM_ID_LANDLOCK:
123			name = "landlock";
124			break;
125		default:
126			name = "INVALID";
127			break;
128		}
129		ASSERT_EQ(0, strncmp(cp, name, strlen(name)));
130		cp += strlen(name) + 1;
131	}
132
133	free(sysfs_lsms);
134	free(syscall_lsms);
135}
136
137TEST_HARNESS_MAIN