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10#include <errno.h>
11#include <linux/landlock.h>
12#include <sys/capability.h>
13#include <sys/syscall.h>
14#include <sys/types.h>
15#include <sys/wait.h>
16#include <unistd.h>
17
18#include "../kselftest_harness.h"
19
20#ifndef ARRAY_SIZE
21#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
22#endif
23
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30
31
32#define TEST_F_FORK(fixture_name, test_name) \
33 static void fixture_name##_##test_name##_child( \
34 struct __test_metadata *_metadata, \
35 FIXTURE_DATA(fixture_name) *self, \
36 const FIXTURE_VARIANT(fixture_name) *variant); \
37 TEST_F(fixture_name, test_name) \
38 { \
39 int status; \
40 const pid_t child = fork(); \
41 if (child < 0) \
42 abort(); \
43 if (child == 0) { \
44 _metadata->no_print = 1; \
45 fixture_name##_##test_name##_child(_metadata, self, variant); \
46 if (_metadata->skip) \
47 _exit(255); \
48 if (_metadata->passed) \
49 _exit(0); \
50 _exit(_metadata->step); \
51 } \
52 if (child != waitpid(child, &status, 0)) \
53 abort(); \
54 if (WIFSIGNALED(status) || !WIFEXITED(status)) { \
55 _metadata->passed = 0; \
56 _metadata->step = 1; \
57 return; \
58 } \
59 switch (WEXITSTATUS(status)) { \
60 case 0: \
61 _metadata->passed = 1; \
62 break; \
63 case 255: \
64 _metadata->passed = 1; \
65 _metadata->skip = 1; \
66 break; \
67 default: \
68 _metadata->passed = 0; \
69 _metadata->step = WEXITSTATUS(status); \
70 break; \
71 } \
72 } \
73 static void fixture_name##_##test_name##_child( \
74 struct __test_metadata __attribute__((unused)) *_metadata, \
75 FIXTURE_DATA(fixture_name) __attribute__((unused)) *self, \
76 const FIXTURE_VARIANT(fixture_name) \
77 __attribute__((unused)) *variant)
78
79#ifndef landlock_create_ruleset
80static inline int landlock_create_ruleset(
81 const struct landlock_ruleset_attr *const attr,
82 const size_t size, const __u32 flags)
83{
84 return syscall(__NR_landlock_create_ruleset, attr, size, flags);
85}
86#endif
87
88#ifndef landlock_add_rule
89static inline int landlock_add_rule(const int ruleset_fd,
90 const enum landlock_rule_type rule_type,
91 const void *const rule_attr, const __u32 flags)
92{
93 return syscall(__NR_landlock_add_rule, ruleset_fd, rule_type,
94 rule_attr, flags);
95}
96#endif
97
98#ifndef landlock_restrict_self
99static inline int landlock_restrict_self(const int ruleset_fd,
100 const __u32 flags)
101{
102 return syscall(__NR_landlock_restrict_self, ruleset_fd, flags);
103}
104#endif
105
106static void _init_caps(struct __test_metadata *const _metadata, bool drop_all)
107{
108 cap_t cap_p;
109
110 const cap_value_t caps[] = {
111 CAP_DAC_OVERRIDE,
112 CAP_MKNOD,
113 CAP_SYS_ADMIN,
114 CAP_SYS_CHROOT,
115 };
116
117 cap_p = cap_get_proc();
118 EXPECT_NE(NULL, cap_p) {
119 TH_LOG("Failed to cap_get_proc: %s", strerror(errno));
120 }
121 EXPECT_NE(-1, cap_clear(cap_p)) {
122 TH_LOG("Failed to cap_clear: %s", strerror(errno));
123 }
124 if (!drop_all) {
125 EXPECT_NE(-1, cap_set_flag(cap_p, CAP_PERMITTED,
126 ARRAY_SIZE(caps), caps, CAP_SET)) {
127 TH_LOG("Failed to cap_set_flag: %s", strerror(errno));
128 }
129 }
130 EXPECT_NE(-1, cap_set_proc(cap_p)) {
131 TH_LOG("Failed to cap_set_proc: %s", strerror(errno));
132 }
133 EXPECT_NE(-1, cap_free(cap_p)) {
134 TH_LOG("Failed to cap_free: %s", strerror(errno));
135 }
136}
137
138
139__attribute__((__unused__))
140static void disable_caps(struct __test_metadata *const _metadata)
141{
142 _init_caps(_metadata, false);
143}
144
145__attribute__((__unused__))
146static void drop_caps(struct __test_metadata *const _metadata)
147{
148 _init_caps(_metadata, true);
149}
150
151static void _effective_cap(struct __test_metadata *const _metadata,
152 const cap_value_t caps, const cap_flag_value_t value)
153{
154 cap_t cap_p;
155
156 cap_p = cap_get_proc();
157 EXPECT_NE(NULL, cap_p) {
158 TH_LOG("Failed to cap_get_proc: %s", strerror(errno));
159 }
160 EXPECT_NE(-1, cap_set_flag(cap_p, CAP_EFFECTIVE, 1, &caps, value)) {
161 TH_LOG("Failed to cap_set_flag: %s", strerror(errno));
162 }
163 EXPECT_NE(-1, cap_set_proc(cap_p)) {
164 TH_LOG("Failed to cap_set_proc: %s", strerror(errno));
165 }
166 EXPECT_NE(-1, cap_free(cap_p)) {
167 TH_LOG("Failed to cap_free: %s", strerror(errno));
168 }
169}
170
171__attribute__((__unused__))
172static void set_cap(struct __test_metadata *const _metadata,
173 const cap_value_t caps)
174{
175 _effective_cap(_metadata, caps, CAP_SET);
176}
177
178__attribute__((__unused__))
179static void clear_cap(struct __test_metadata *const _metadata,
180 const cap_value_t caps)
181{
182 _effective_cap(_metadata, caps, CAP_CLEAR);
183}
184